Plandomizer.py

from __future__ import annotations
import itertools
import json
import math
import re
import random
from collections import defaultdict
from collections.abc import Callable, Iterable, Sequence
from functools import reduce
from typing import TYPE_CHECKING, Any, Optional

import StartingItems
from Entrance import Entrance
from EntranceShuffle import EntranceShuffleError, change_connections, confirm_replacement, validate_world, check_entrances_compatibility
from Fill import FillError
from Hints import HintArea, gossipLocations, GossipText
from Item import ItemFactory, ItemInfo, ItemIterator, is_item, Item
from ItemPool import item_groups, get_junk_item, song_list, trade_items, child_trade_items, eggs, triforce_blitz_items, triforce_pieces
from JSONDump import dump_obj, CollapseList, CollapseDict, AlignedDict, SortedDict
from Location import Location, LocationIterator, LocationFactory
from LocationList import location_groups, location_table
from Search import Search
from SettingsList import build_close_match, validate_settings
from Spoiler import Spoiler, HASH_ICONS
from version import __version__

if TYPE_CHECKING:
    from SaveContext import SaveContext
    from Settings import Settings
    from State import State
    from World import World


class InvalidFileException(Exception):
    pass


per_world_keys = (
    'settings',
    'randomized_settings',
    'item_pool',
    'dungeons',
    'empty_dungeons',
    'trials',
    'songs',
    'entrances',
    'locations',
    ':skipped_locations',
    ':woth_locations',
    ':goal_locations',
    ':barren_regions',
    'gossip_stones',
)


class Record:
    def __init__(self, properties: Optional[dict[str, Any]] = None, src_dict: Optional[dict[str, Any]] = None) -> None:
        self.properties: dict[str, Any] = properties if properties is not None else getattr(self, "properties")
        if src_dict is not None:
            self.update(src_dict, update_all=True)

    def update(self, src_dict: dict[str, Any], update_all: bool = False) -> None:
        if src_dict is None:
            src_dict = {}
        if isinstance(src_dict, list):
            src_dict = {"item": src_dict}
        for k, p in self.properties.items():
            if update_all or k in src_dict:
                setattr(self, k, src_dict.get(k, p))

    def to_json(self) -> dict[str, Any]:
        return {k: getattr(self, k) for (k, d) in self.properties.items() if getattr(self, k) != d}

    def __str__(self) -> str:
        return dump_obj(self.to_json())


class DungeonRecord(Record):
    mapping: dict[str, Optional[bool]] = {
        'random': None,
        'mq': True,
        'vanilla': False,
    }

    def __init__(self, src_dict: str | dict[str, Optional[bool]] = 'random') -> None:
        self.mq: Optional[bool] = None

        if isinstance(src_dict, str):
            src_dict = {'mq': self.mapping.get(src_dict, None)}
        super().__init__({'mq': None}, src_dict)

    def to_json(self) -> str:
        if self.mq is None:
            return 'random'
        return 'mq' if self.mq else 'vanilla'


class EmptyDungeonRecord(Record):
    def __init__(self, src_dict: Optional[bool | str | dict[str, Optional[bool]]] = 'random') -> None:
        self.empty: Optional[bool] = None

        if src_dict == 'random':
            src_dict = {'empty': None}
        elif isinstance(src_dict, bool):
            src_dict = {'empty': src_dict}
        super().__init__({'empty': None}, src_dict)

    def to_json(self) -> Optional[bool]:
        return self.empty


class GossipRecord(Record):
    def __init__(self, src_dict: dict[str, Any]) -> None:
        self.colors: Optional[Sequence[str]] = None
        self.hinted_locations: Optional[Sequence[str]] = None
        self.hinted_items: Optional[Sequence[str]] = None
        self.hint_type: Optional[str] = None
        super().__init__({'text': None, 'colors': None, 'hinted_locations': None, 'hinted_items': None, 'hint_type': None}, src_dict)

    def to_json(self) -> dict[str, Any]:
        if self.colors is not None:
            self.colors = CollapseList(self.colors)
        if self.hinted_locations is not None:
            self.hinted_locations = CollapseList(self.hinted_locations)
        if self.hinted_items is not None:
            self.hinted_items = CollapseList(self.hinted_items)
        return CollapseDict(super().to_json())


class ItemPoolRecord(Record):
    def __init__(self, src_dict: int | dict[str, int] = 1) -> None:
        self.type: str = 'set'
        self.count: int = 1

        if isinstance(src_dict, int):
            src_dict = {'count': src_dict}
        super().__init__({'type': 'set', 'count': 1}, src_dict)

    def to_json(self) -> int | CollapseDict:
        if self.type == 'set':
            return self.count
        else:
            return CollapseDict(super().to_json())

    def update(self, src_dict: dict[str, Any], update_all: bool = False) -> None:
        super().update(src_dict, update_all)
        if self.count < 0:
            raise ValueError("Count cannot be negative in a ItemPoolRecord.")
        if self.type not in ('add', 'remove', 'set'):
            raise ValueError("Type must be 'add', 'remove', or 'set' in a ItemPoolRecord.")


class LocationRecord(Record):
    def __init__(self, src_dict: dict[str, Any] | str) -> None:
        self.item: Optional[str | list[str]] = None
        self.player: Optional[int] = None

        if isinstance(src_dict, str):
            src_dict = {'item': src_dict}
        super().__init__({'item': None, 'player': None, 'price': None, 'model': None}, src_dict)

    def to_json(self) -> str | CollapseDict:
        self_dict = super().to_json()
        if list(self_dict.keys()) == ['item']:
            return str(self.item)
        else:
            return CollapseDict(self_dict)

    @staticmethod
    def from_item(item: Item) -> LocationRecord:
        if item.world.settings.world_count > 1:
            player = item.world.id + 1
        else:
            player = None if item.location is not None and item.world is item.location.world else (item.world.id + 1)

        return LocationRecord({
            'item': item.name,
            'player': player,
            'model': item.looks_like_item.name if item.looks_like_item is not None and item.location.has_preview() and can_cloak(item, item.looks_like_item) else None,
            'price': item.location.price,
        })


class EntranceRecord(Record):
    def __init__(self, src_dict: dict[str, Optional[str]] | str) -> None:
        self.region: Optional[str] = None
        self.origin: Optional[str] = None

        if isinstance(src_dict, str):
            src_dict = {'region': src_dict}
        if 'from' in src_dict:
            src_dict['origin'] = src_dict['from']
            del src_dict['from']
        super().__init__({'region': None, 'origin': None}, src_dict)

    def to_json(self) -> str | CollapseDict:
        self_dict = super().to_json()
        if list(self_dict.keys()) == ['region']:
            return str(self.region)
        else:
            self_dict['from'] = self_dict['origin']
            del self_dict['origin']
            return CollapseDict(self_dict)

    @staticmethod
    def from_entrance(entrance: Entrance) -> EntranceRecord:
        if entrance.replaces.primary and entrance.replaces.type in ('Interior', 'SpecialInterior', 'Grotto', 'Grave'):
            origin_name = None
        else:
            origin_name = entrance.replaces.parent_region.name
        return EntranceRecord({
            'region': entrance.connected_region.name,
            'origin': origin_name,
        })


class StarterRecord(Record):
    def __init__(self, src_dict: int = 1) -> None:
        self.count: int = 1

        if isinstance(src_dict, int):
            src_dict = {'count': src_dict}
        super().__init__({'count': 1}, src_dict)

    def copy(self) -> StarterRecord:
        return StarterRecord(self.count)

    def to_json(self) -> int:
        return self.count


class TrialRecord(Record):
    mapping: dict[str, Optional[bool]] = {
        'random': None,
        'active': True,
        'inactive': False,
    }

    def __init__(self, src_dict: str | dict[str, Optional[bool]] = 'random') -> None:
        self.active: Optional[bool] = None

        if isinstance(src_dict, str):
            src_dict = {'active': self.mapping.get(src_dict, None)}
        super().__init__({'active': None}, src_dict)

    def to_json(self) -> str:
        if self.active is None:
            return 'random'
        return 'active' if self.active else 'inactive'


class SongRecord(Record):
    def __init__(self, src_dict: Optional[str | dict[str, Optional[str]]] = None) -> None:
        self.notes: Optional[str] = None

        if src_dict is None or isinstance(src_dict, str):
            src_dict = {'notes': src_dict}
        super().__init__({'notes': None}, src_dict)

    def to_json(self) -> str:
        return self.notes


class WorldDistribution:
    def __init__(self, distribution: Distribution, id: int, src_dict: Optional[dict[str, Any]] = None) -> None:
        self.randomized_settings: Optional[dict[str, Any]] = None
        self.dungeons: Optional[dict[str, DungeonRecord]] = None
        self.empty_dungeons: Optional[dict[str, EmptyDungeonRecord]] = None
        self.trials: Optional[dict[str, TrialRecord]] = None
        self.songs: Optional[dict[str, SongRecord]] = None
        self.item_pool: Optional[dict[str, ItemPoolRecord]] = None
        self.entrances: Optional[dict[str, EntranceRecord]] = None
        self.locations: Optional[dict[str, LocationRecord | list[LocationRecord]]] = None
        self.woth_locations: Optional[dict[str, LocationRecord]] = None
        self.goal_locations: Optional[dict[str, dict[str, dict[str, LocationRecord | dict[str, LocationRecord]]]]] = None
        self.barren_regions: Optional[list[str]] = None
        self.gossip_stones: Optional[dict[str, GossipRecord]] = None
        self.settings: Optional[Settings] = None

        self.distribution: Distribution = distribution
        self.id: int = id
        self.base_pool: list[str] = []
        self.major_group: list[str] = []
        self.song_as_items: bool = False
        self.skipped_locations: list[Location] = []
        self.effective_starting_items: dict[str, StarterRecord] = {}

        src_dict = {} if src_dict is None else src_dict
        self.update(src_dict, update_all=True)

    def update(self, src_dict: dict[str, Any], update_all: bool = False) -> None:
        update_dict = {
            'randomized_settings': {name: record for (name, record) in src_dict.get('randomized_settings', {}).items()},
            'dungeons': {name: DungeonRecord(record) for (name, record) in src_dict.get('dungeons', {}).items()},
            'empty_dungeons': {name: EmptyDungeonRecord(record) for (name, record) in src_dict.get('empty_dungeons', {}).items()},
            'trials': {name: TrialRecord(record) for (name, record) in src_dict.get('trials', {}).items()},
            'songs': {name: SongRecord(record) for (name, record) in src_dict.get('songs', {}).items()},
            'item_pool': {name: ItemPoolRecord(record) for (name, record) in src_dict.get('item_pool', {}).items()},
            'entrances': {name: EntranceRecord(record) for (name, record) in src_dict.get('entrances', {}).items()},
            'locations': {name: [LocationRecord(rec) for rec in record] if is_pattern(name) else LocationRecord(record) for (name, record) in src_dict.get('locations', {}).items() if not is_output_only(name)},
            'woth_locations': None,
            'goal_locations': None,
            'barren_regions': None,
            'gossip_stones': {name: [GossipRecord(rec) for rec in record] if is_pattern(name) else GossipRecord(record) for (name, record) in src_dict.get('gossip_stones', {}).items()},
        }

        if update_all:
            self.__dict__.update(update_dict)
        else:
            for k in src_dict:
                if k in update_dict:
                    value = update_dict[k]
                    if self.__dict__.get(k, None) is None:
                        setattr(self, k, value)
                    elif isinstance(value, dict):
                        getattr(self, k).update(value)
                    elif isinstance(value, list):
                        getattr(self, k).extend(value)
                    else:
                        setattr(self, k, None)

    def to_json(self) -> dict[str, Any]:
        return {
            'settings': self.settings.to_json(),
            'randomized_settings': self.randomized_settings,
            'dungeons': {name: record.to_json() for (name, record) in self.dungeons.items()},
            'empty_dungeons': {name: record.to_json() for (name, record) in self.empty_dungeons.items()},
            'trials': {name: record.to_json() for (name, record) in self.trials.items()},
            'songs': {name: record.to_json() for (name, record) in self.songs.items()},
            'item_pool': SortedDict({name: record.to_json() for (name, record) in self.item_pool.items()}),
            'entrances': {name: record.to_json() for (name, record) in self.entrances.items()},
            'locations': {name: [rec.to_json() for rec in record] if is_pattern(name) else record.to_json() for (name, record) in self.locations.items()},
            ':skipped_locations': {loc.name: LocationRecord.from_item(loc.item).to_json() for loc in self.skipped_locations},
            ':woth_locations': None if self.woth_locations is None else {name: record.to_json() for (name, record) in self.woth_locations.items()},
            ':goal_locations': self.goal_locations,
            ':barren_regions': self.barren_regions,
            'gossip_stones': SortedDict({name: [rec.to_json() for rec in record] if is_pattern(name) else record.to_json() for (name, record) in self.gossip_stones.items()}),
        }

    def __str__(self) -> str:
        return dump_obj(self.to_json())

    def pattern_matcher(self, pattern: str | list[str]) -> Callable[[str], bool]:
        if isinstance(pattern, list):
            pattern_list = []
            for pattern_item in pattern:
                pattern_list.append(self.pattern_matcher(pattern_item))
            return reduce(lambda acc, sub_matcher: lambda name, item=None: sub_matcher(name, item) or acc(name, item), pattern_list, lambda s, i=None: False)

        invert = pattern.startswith('!')
        if invert:
            pattern = pattern[1:]
        if pattern.startswith('#'):
            group = self.distribution.search_groups[pattern[1:]]
            if pattern == '#MajorItem':
                if not self.major_group: # If necessary to compute major_group, do so only once
                    self.major_group = [item for item in group if item in self.base_pool]
                    # Songs included by default, remove them if songs not set to anywhere
                    if self.settings.shuffle_song_items != "any":
                        self.major_group = [x for x in self.major_group if x not in item_groups['Song']]
                    # Special handling for things not included in base_pool
                    if self.settings.triforce_hunt:
                        if self.settings.triforce_hunt_mode == 'easter_egg_hunt':
                            self.major_group.extend(eggs)
                        elif self.settings.triforce_hunt_mode == 'blitz':
                            self.major_group.extend(triforce_blitz_items)
                        else:
                            self.major_group.append('Triforce Piece')
                    major_tokens = ((not self.settings.triforce_hunt and
                            self.settings.shuffle_ganon_bosskey == 'on_lacs' and
                            self.settings.lacs_condition == 'tokens') or
                            (not self.settings.triforce_hunt and
                            self.settings.shuffle_ganon_bosskey == 'tokens') or
                            self.settings.bridge == 'tokens')
                    if self.settings.tokensanity == 'all' and major_tokens:
                        self.major_group.append('Gold Skulltula Token')
                    major_hearts = ((not self.settings.triforce_hunt and
                            self.settings.shuffle_ganon_bosskey == 'on_lacs' and
                            self.settings.lacs_condition == 'hearts') or
                            (not self.settings.triforce_hunt and
                            self.settings.shuffle_ganon_bosskey == 'hearts') or
                            self.settings.bridge == 'hearts')
                    if major_hearts:
                        self.major_group += ['Heart Container', 'Piece of Heart', 'Piece of Heart (Treasure Chest Game)']
                    if self.settings.shuffle_smallkeys == 'keysanity':
                        for dungeon in ('Bottom of the Well', 'Forest Temple', 'Fire Temple', 'Water Temple',
                                        'Shadow Temple', 'Spirit Temple', 'Gerudo Training Ground', 'Ganons Castle'):
                            if dungeon in self.settings.key_rings:
                                self.major_group.append(f"Small Key Ring ({dungeon})")
                            else:
                                self.major_group.append(f"Small Key ({dungeon})")
                    if self.settings.shuffle_hideoutkeys == 'keysanity':
                        if 'Thieves Hideout' in self.settings.key_rings:
                            self.major_group.append('Small Key Ring (Thieves Hideout)')
                        else:
                            self.major_group.append('Small Key (Thieves Hideout)')
                    if self.settings.shuffle_tcgkeys == 'keysanity':
                        if 'Treasure Chest Game' in self.settings.key_rings:
                            self.major_group.append('Small Key Ring (Treasure Chest Game)')
                        else:
                            self.major_group.append('Small Key (Treasure Chest Game)')
                    if self.settings.shuffle_bosskeys == 'keysanity':
                        keys = [name for name, item in ItemInfo.items.items() if item.type == 'BossKey' and name != 'Boss Key']
                        self.major_group.extend(keys)
                    if self.settings.shuffle_ganon_bosskey == 'keysanity' and not self.settings.triforce_hunt:
                        keys = [name for name, item in ItemInfo.items.items() if item.type == 'GanonBossKey']
                        self.major_group.extend(keys)
                    if self.settings.shuffle_silver_rupees == 'anywhere':
                        rupees = [name for name, item in ItemInfo.items.items() if item.type == 'SilverRupee']
                        self.major_group.extend(rupees)
                group = self.major_group
            if pattern == '#Junk':
                return lambda s, i=None: invert != (s in group or (i is not None and i.world is not None and i.world.max_tokens == 0 and i.name == 'Gold Skulltula Token'))
            return lambda s, i=None: invert != (s in group)
        wildcard_begin = pattern.startswith('*')
        if wildcard_begin:
            pattern = pattern[1:]
        wildcard_end = pattern.endswith('*')
        if wildcard_end:
            pattern = pattern[:-1]
            if wildcard_begin:
                return lambda s, i=None: invert != (pattern in s)
            else:
                return lambda s, i=None: invert != s.startswith(pattern)
        else:
            if wildcard_begin:
                return lambda s, i=None: invert != s.endswith(pattern)
            else:
                return lambda s, i=None: invert != (s == pattern)

    # adds the location entry only if there is no record for that location already
    def add_location(self, new_location: str, new_item: str) -> None:
        for (location, record) in self.locations.items():
            pattern = self.pattern_matcher(location)
            if pattern(new_location):
                raise KeyError('Cannot add location that already exists')
        self.locations[new_location] = LocationRecord(new_item)

    def configure_dungeons(self, world: World, mq_dungeon_pool: list[str], empty_dungeon_pool: list[str]) -> tuple[int, int]:
        dist_num_mq, dist_num_empty = 0, 0
        for (name, record) in self.dungeons.items():
            if record.mq is not None:
                mq_dungeon_pool.remove(name)
                if record.mq:
                    dist_num_mq += 1
                    world.dungeon_mq[name] = True
        for (name, record) in self.empty_dungeons.items():
            if record.empty is not None:
                empty_dungeon_pool.remove(name)
                if record.empty:
                    dist_num_empty += 1
                    world.empty_dungeons[name].empty = True
        return dist_num_mq, dist_num_empty

    def configure_trials(self, trial_pool: list[str]) -> list[str]:
        dist_chosen = []
        for (name, record) in self.trials.items():
            if record.active is not None:
                trial_pool.remove(name)
                if record.active:
                    dist_chosen.append(name)
        return dist_chosen

    def configure_songs(self) -> dict[str, str]:
        dist_notes = {}
        for (name, record) in self.songs.items():
            if record.notes is not None:
                dist_notes[name] = record.notes
        return dist_notes

    # Add randomized_settings defined in distribution to world's randomized settings list
    def configure_randomized_settings(self, world: World) -> None:
        settings = world.settings
        for name, record in self.randomized_settings.items():
            if not hasattr(settings, name):
                raise RuntimeError(f"Unknown random setting in world {self.id + 1}: '{name}'")
            setattr(settings, name, record)
            if name not in world.randomized_list:
                world.randomized_list.append(name)

    def pool_remove_item(self, pools: list[list[str | Item]], item_name: str, count: int,
                         world_id: Optional[int] = None, use_base_pool: bool = True) -> list[str | Item]:
        removed_items = []

        base_remove_matcher = self.pattern_matcher(item_name)
        remove_matcher = lambda name, item=None: base_remove_matcher(name, item) and ((name in self.base_pool) ^ (not use_base_pool))
        if world_id is None:
            predicate = remove_matcher
        else:
            predicate = lambda item: item.world.id == world_id and remove_matcher(item.name, item)

        for i in range(count):
            removed_item = pull_random_element(pools, predicate)
            if removed_item is None:
                if not use_base_pool:
                    if is_item(item_name):
                        raise KeyError('No remaining items matching "%s" to be removed.' % (item_name))
                    else:
                        raise KeyError('No items matching "%s"' % (item_name))
                else:
                    removed_items.extend(self.pool_remove_item(pools, item_name, count - i, world_id=world_id, use_base_pool=False))
                    break
            if use_base_pool:
                if world_id is None:
                    self.base_pool.remove(removed_item)
                else:
                    self.base_pool.remove(removed_item.name)
            removed_items.append(removed_item)

        return removed_items

    def pool_add_item(self, pool: list[str], item_name: str, count: int) -> list[str]:
        if item_name == '#Junk':
            added_items = get_junk_item(count, pool=pool, plando_pool=self.item_pool)
        elif is_pattern(item_name):
            add_matcher = lambda item: self.pattern_matcher(item_name)(item.name, item)
            candidates = [
                item.name for item in ItemIterator(predicate=add_matcher)
                if item.name not in self.item_pool or self.item_pool[item.name].count != 0
            ]  # Only allow items to be candidates if they haven't been set to 0
            if len(candidates) == 0:
                raise RuntimeError("Unknown item, or item set to 0 in the item pool could not be added: " + repr(item_name) + ". " + build_close_match(item_name, 'item'))
            added_items = random.choices(candidates, k=count)
        else:
            if not is_item(item_name):
                raise RuntimeError("Unknown item could not be added: " + repr(item_name) + ". " + build_close_match(item_name, 'item'))
            added_items = [item_name] * count

        for item in added_items:
            pool.append(item)

        return added_items

    def alter_pool(self, world: World, pool: list[str]) -> list[str]:
        self.base_pool = list(pool)
        pool_size = len(pool)
        bottle_matcher = self.pattern_matcher("#Bottle")
        adult_trade_matcher  = self.pattern_matcher("#AdultTrade")
        child_trade_matcher  = self.pattern_matcher("#ChildTrade")
        bottles = 0

        for item_name, record in self.item_pool.items():
            if record.type == 'add':
                self.pool_add_item(pool, item_name, record.count)
            if record.type == 'remove':
                self.pool_remove_item([pool], item_name, record.count)

        remove_trade = []
        for item_name, record in self.item_pool.items():
            if record.type == 'set':
                if item_name == '#Junk':
                    raise ValueError('#Junk item group cannot have a set number of items')
                elif item_name == 'Ice Arrows' and world.settings.blue_fire_arrows:
                    raise ValueError('Cannot add Ice Arrows to item pool with Blue Fire Arrows enabled')
                elif item_name == 'Blue Fire Arrows' and not world.settings.blue_fire_arrows:
                    raise ValueError('Cannot add Blue Fire Arrows to item pool with Blue Fire Arrows disabled')
                elif child_trade_matcher(item_name) and item_name not in world.settings.shuffle_child_trade:
                    remove_trade.append(item_name)
                    continue
                elif child_trade_matcher(item_name) and world.settings.item_pool_value not in ('plentiful', 'ludicrous'):
                    self.item_pool[item_name].count = 1
                    continue
                predicate = self.pattern_matcher(item_name)
                pool_match = [item for item in pool if predicate(item)]
                for item in pool_match:
                    self.base_pool.remove(item)

                add_count = record.count - len(pool_match)
                if add_count > 0:
                    added_items = self.pool_add_item(pool, item_name, add_count)
                    for item in added_items:
                        if bottle_matcher(item):
                            bottles += 1
                        elif adult_trade_matcher(item) and not (world.settings.item_pool_value in ('plentiful', 'ludicrous') or world.settings.adult_trade_shuffle):
                            self.pool_remove_item([pool], "#AdultTrade", 1)
                else:
                    removed_items = self.pool_remove_item([pool], item_name, -add_count)
                    for item in removed_items:
                        if bottle_matcher(item):
                            bottles -= 1
                        elif adult_trade_matcher(item) and not (world.settings.item_pool_value in ('plentiful', 'ludicrous') or world.settings.adult_trade_shuffle):
                            self.pool_add_item(pool, "#AdultTrade", 1)

        for item in remove_trade:
            del self.item_pool[item]

        if bottles > 0:
            self.pool_remove_item([pool], '#Bottle', bottles)
        else:
            self.pool_add_item(pool, '#Bottle', -bottles)

        for item_name, record in self.settings.starting_items.items():
            if bottle_matcher(item_name):
                self.pool_remove_item([pool], "#Bottle", record.count)
            elif item_name in ('Pocket Egg', 'Pocket Cucco') and world.settings.adult_trade_shuffle:
                try:
                    if 'Pocket Egg' in world.settings.adult_trade_start:
                        try:
                            self.pool_remove_item([pool], "Pocket Egg", record.count)
                        except KeyError:
                            raise KeyError('Tried to start with a Pocket Egg but could not remove it from the item pool. Are both Pocket Egg and Pocket Cucco shuffled?')
                    elif 'Pocket Cucco' not in world.settings.adult_trade_start:
                        raise RuntimeError(f'An unshuffled trade item was included as a starting item. Please either remove {item_name} from starting items or add it to Adult Trade Sequence Items.')
                    else:
                        self.pool_remove_item([pool], "Pocket Cucco", record.count)
                except KeyError:
                    raise KeyError('Tried to start with a Pocket Egg or Pocket Cucco but could not remove it from the item pool. Are both Pocket Egg and Pocket Cucco shuffled?')
            elif adult_trade_matcher(item_name) and not world.settings.adult_trade_shuffle:
                self.pool_remove_item([pool], "#AdultTrade", record.count)
            elif item_name == 'Ice Arrows' and world.settings.blue_fire_arrows:
                self.pool_remove_item([pool], "Blue Fire Arrows", record.count)
            elif item_name in ('Weird Egg', 'Chicken') and world.settings.shuffle_child_trade:
                try:
                    if 'Weird Egg' in world.settings.shuffle_child_trade:
                        self.pool_remove_item([pool], "Weird Egg", record.count)
                    elif 'Chicken' not in world.settings.shuffle_child_trade:
                        raise RuntimeError(f'An unshuffled trade item was included as a starting item. Please either remove {item_name} from starting items or add it to Shuffled Child Trade Sequence Items.')
                    else:
                        self.pool_remove_item([pool], "Chicken", record.count)
                except KeyError:
                    raise KeyError('Tried to start with a Weird Egg or Chicken but could not remove it from the item pool. Are both Weird Egg and the Chicken shuffled?')
            elif is_item(item_name):
                try:
                    self.pool_remove_item([pool], item_name, record.count)
                except KeyError:
                    pass
                if item_name in item_groups["Song"]:
                    self.song_as_items = True

        junk_to_add = pool_size - len(pool)
        if junk_to_add > 0:
            self.pool_add_item(pool, "#Junk", junk_to_add)
        else:
            self.pool_remove_item([pool], "#Junk", -junk_to_add)

        return pool

    def set_complete_itempool(self, pool: list[Item]) -> None:
        self.item_pool = {}
        for item in pool:
            if item.dungeonitem or item.type in ('Drop', 'Event', 'DungeonReward'):
                continue
            if item.name in self.item_pool:
                self.item_pool[item.name].count += 1
            else:
                self.item_pool[item.name] = ItemPoolRecord()

    def collect_starters(self, state: State) -> None:
        for (name, record) in self.settings.starting_items.items():
            for _ in range(record.count):
                item = ItemFactory("Bottle" if name == "Bottle with Milk (Half)" else name, state.world)
                state.collect(item)

    def pool_replace_item(self, item_pools: list[list[Item]], item_group: str, player_id: int, new_item: str, worlds: list[World]) -> Item:
        removed_item = self.pool_remove_item(item_pools, item_group, 1, world_id=player_id)[0]
        item_matcher = lambda item: self.pattern_matcher(new_item)(item.name, item)
        if self.item_pool[removed_item.name].count > 1:
            self.item_pool[removed_item.name].count -= 1
        else:
            del self.item_pool[removed_item.name]
        if new_item == "#Junk":
            if self.settings.enable_distribution_file:
                return ItemFactory(get_junk_item(1, self.base_pool, self.item_pool))[0]
            else:  # Generator settings that add junk to the pool should not be strict about the item_pool definitions
                return ItemFactory(get_junk_item(1))[0]
        return random.choice(list(ItemIterator(item_matcher, worlds[player_id])))

    def set_shuffled_entrances(self, worlds: list[World], entrance_pools: dict[str, list[Entrance]], target_entrance_pools: dict[str, list[Entrance]],
                               locations_to_ensure_reachable: Iterable[Location], itempool: list[Item]) -> None:
        for (name, record) in self.entrances.items():
            if record.region is None:
                continue
            try:
                if not worlds[self.id].get_entrance(name):
                    raise RuntimeError('Unknown entrance in world %d: %s. %s' % (self.id + 1, name, build_close_match(name, 'entrance', entrance_pools)))
            except KeyError:
                raise RuntimeError('Unknown entrance in world %d: %s. %s' % (self.id + 1, name, build_close_match(name, 'entrance', entrance_pools)))

            entrance_found = False
            for pool_type, entrance_pool in entrance_pools.items():
                try:
                    matched_entrance = next(filter(lambda entrance: entrance.name == name, entrance_pool))
                except StopIteration:
                    continue

                entrance_found = True
                if matched_entrance.connected_region is not None:
                    if matched_entrance.type == 'Overworld':
                        continue
                    else:
                        raise RuntimeError('Entrance already shuffled in world %d: %s' % (self.id + 1, name))

                target_region = record.region

                matched_targets_to_region = list(filter(lambda target: target.connected_region and target.connected_region.name == target_region,
                                                        target_entrance_pools[pool_type]))
                if not matched_targets_to_region:
                    raise RuntimeError('No entrance found to replace with %s that leads to %s in world %d' %
                                                (matched_entrance, target_region, self.id + 1))

                if record.origin:
                    target_parent = record.origin
                    try:
                        matched_target = next(filter(lambda target: target.replaces.parent_region.name == target_parent, matched_targets_to_region))
                    except StopIteration:
                        raise RuntimeError('No entrance found to replace with %s that leads to %s from %s in world %d' %
                                                (matched_entrance, target_region, target_parent, self.id + 1))
                else:
                    matched_target = matched_targets_to_region[0]
                    target_parent = matched_target.parent_region.name

                if matched_target.connected_region is None:
                    raise RuntimeError('Entrance leading to %s from %s is already shuffled in world %d' %
                                            (target_region, target_parent, self.id + 1))

                try:
                    check_entrances_compatibility(matched_entrance, matched_target)
                    change_connections(matched_entrance, matched_target)
                    validate_world(matched_entrance.world, worlds, None, locations_to_ensure_reachable, itempool)
                except EntranceShuffleError as error:
                    raise RuntimeError('Cannot connect %s To %s in world %d (Reason: %s)' %
                                            (matched_entrance, matched_entrance.connected_region or matched_target.connected_region, self.id + 1, error))

                confirm_replacement(matched_entrance, matched_target)

            if not entrance_found:
                raise RuntimeError('Entrance does not belong to a pool of shuffled entrances in world %d: %s' % (self.id + 1, name))

    def pattern_dict_items(self, pattern_dict: dict[str, Any]) -> Iterable[tuple[str, Any]]:
        """Retrieve a location by pattern.

        :param pattern_dict: the location dictionary. Capable of containing a pattern.
        :return: tuple:
                    0: the name of the location
                    1: the item to place at the location
        """
        # TODO: This has the same issue with the invert pattern as items do.
        #  It pulls randomly(?) from all locations instead of ones that make sense.
        #  e.g. "!Queen Gohma" results in "KF Kokiri Sword Chest"
        for (key, value) in pattern_dict.items():
            if is_pattern(key):
                pattern = lambda loc: self.pattern_matcher(key)(loc.name)
                for location in LocationIterator(pattern):
                    yield location.name, value
            else:
                yield key, value

    def get_valid_items_from_record(self, itempool: list[Item], used_items: list[str], record: LocationRecord) -> list[str]:
        """Gets items that are valid for placement.

        :param itempool: a list of the item pool to search through for the record
        :param used_items: a list of the items already used from the item pool
        :param record: the item record to choose from
        :return: list:
                    All items in the record that exist in the item pool but have not already been used. Can be empty.
        """
        valid_items = []
        predicate = self.pattern_matcher(record.item)
        if isinstance(record.item, list):
            for choice in record.item:
                if choice[0] == '#' and choice[1:] in item_groups:
                    for item in itempool:
                        if predicate(item.name, item):
                            valid_items.append(choice)
                            break
            for item in itempool:
                if item.name in record.item and predicate(item.name, item):
                    valid_items.append(item.name)
        else:
            if record.item[0] == '#' and record.item[1:] in item_groups:
                for item in itempool:
                    if predicate(item.name, item):
                        valid_items = [record.item]
                        break
            else:
                valid_items = [record.item]
        if used_items is not None:
            for used_item in used_items:
                if used_item in valid_items:
                    valid_items.remove(used_item)

        return valid_items

    def pull_item_or_location(self, pools: list[list[Item | Location]], world: World, name: str, remove: bool = True) -> Optional[Item | Location]:
        """Finds and removes (unless told not to do so) an item or location matching the criteria from a list of pools.

        :param pools: the item pools to pull from
        :param world: the world the pools belong to
        :param name: the name of the element to pull from the pools
        :param remove:
                True: Remove the element pulled from the pool
                False: Keep element pulled in the pool
        :return: the element pulled from the pool
        """
        if is_pattern(name):
            matcher = self.pattern_matcher(name)
            return pull_random_element(pools, lambda e: e.world is world and matcher(e.name), remove)
        else:
            return pull_first_element(pools, lambda e: e.world is world and e.name == name, remove)

    def fill_bosses(self, world: World, prize_locs: list[Location], prizepool: list[Item]) -> int:
        count = 0
        used_items = []
        for (name, record) in self.pattern_dict_items(self.locations):
            boss = self.pull_item_or_location([prize_locs], world, name)
            if boss is None:
                try:
                    location = LocationFactory(name)
                except KeyError:
                    raise RuntimeError('Unknown location in world %d: %r. %s' % (world.id + 1, name, build_close_match(name, 'location')))
                if location.type == 'Boss':
                    raise RuntimeError('Boss or already placed in world %d: %s' % (world.id + 1, name))
                else:
                    continue

            if record.player is not None and (record.player - 1) != self.id:
                raise RuntimeError('A boss can only give rewards in its own world')

            valid_items = []
            if record.item == "#Vanilla": # Get vanilla item at this location from the location table
                valid_items.append(location_table[name][4])
            else: # Do normal method of getting valid items for this location
                valid_items = self.get_valid_items_from_record(prizepool, used_items, record)
            if valid_items:  # Choices still available in the item pool, choose one, mark it as a used item
                record.item = random.choices(valid_items)[0]
                if used_items is not None:
                    used_items.append(record.item)

            reward = self.pull_item_or_location([prizepool], world, record.item)
            if reward is None:
                if record.item not in item_groups['DungeonReward']:
                    raise RuntimeError('Cannot place non-dungeon reward %s in world %d on location %s.' % (record.item, self.id + 1, name))
                if is_item(record.item):
                    raise RuntimeError('Reward already placed in world %d: %s' % (world.id + 1, record.item))
                else:
                    raise RuntimeError('Reward unknown in world %d: %s' % (world.id + 1, record.item))
            count += 1
            world.push_item(boss, reward, True)
        return count

    def fill(self, worlds: list[World], location_pools: list[list[Location]], item_pools: list[list[Item]]) -> None:
        """Fills the world with restrictions defined in a plandomizer JSON distribution file.

        :param worlds: A list of the world objects that define the rules of each game world.
        :param location_pools: A list containing all the location pools.
            0: Shop Locations
            1: Song Locations
            2: Fill locations
        :param item_pools: A list containing all the item pools.
            0: Shop Items
            1: Dungeon Items
            2: Songs
            3: Progression Items
            4: Priority Items
            5: The rest of the Item pool
        """
        world = worlds[self.id]
        fillable_locations = [location for location_pool in location_pools for location in location_pool]
        locations = {}
        if self.locations:
            locations = {loc: self.locations[loc] for loc in random.sample(sorted(self.locations), len(self.locations))}
        used_items = []
        record: LocationRecord
        for (location_name, record) in self.pattern_dict_items(locations):
            if record.item is None:
                continue

            location_matcher = lambda loc: loc.world.id == world.id and loc.name.lower() == location_name.lower()
            location = pull_first_element(location_pools, location_matcher)
            if location is None:
                try:
                    location = LocationFactory(location_name)
                except KeyError:
                    raise RuntimeError('Unknown location in world %d: %r. %s' % (world.id + 1, location_name, build_close_match(location_name, 'location')))
                if location.type == 'Boss':
                    continue
                elif location.name in world.settings.disabled_locations:
                    continue
                elif True in (location_matcher(location) for location in fillable_locations):
                    raise RuntimeError('Location already filled in world %d: %s' % (self.id + 1, location_name))
                else:
                    continue

            valid_items = []
            if record.item == "#Vanilla": # Get vanilla item at this location from the location table
                valid_items.append(location_table[location_name][4])
            else: # Do normal method of getting valid items for this location
                valid_items = self.get_valid_items_from_record(world.itempool, used_items, record)
            if not valid_items:
                # Item pool values exceeded. Remove limited items from the list and choose a random value from it
                limited_items = ['#ChildTrade', '#AdultTrade', '#Bottle']
                if isinstance(record.item, list):
                    allowed_choices = []
                    for item in record.item:
                        if item in limited_items or item in item_groups['Bottle'] or item in item_groups['AdultTrade'] or item in item_groups['ChildTrade']:
                            continue
                        allowed_choices.append(item)
                    record.item = random.choices(allowed_choices)[0]
            else:  # Choices still available in item pool, choose one, mark it as a used item
                record.item = random.choices(valid_items)[0]
                if used_items is not None and record.item[0] != '#':
                    used_items.append(record.item)

            player_id = self.id if record.player is None else record.player - 1

            if record.item == '#Junk' and location.type == 'Song' and world.settings.shuffle_song_items in ('vanilla', 'song') and not any(name in song_list and r.count for name, r in world.settings.starting_items.items()):
                record.item = '#JunkSong'

            ignore_pools = None
            is_invert = self.pattern_matcher(record.item)('!')
            if is_invert and location.type != 'Song' and world.settings.shuffle_song_items in ('vanilla', 'song'):
                ignore_pools = [2]
            if is_invert and location.type == 'Song' and world.settings.shuffle_song_items in ('vanilla', 'song'):
                ignore_pools = [i for i in range(len(item_pools)) if i != 2]
            # location.price will be None for Shop Buy items
            if location.type == 'Shop' and location.price is None:
                ignore_pools = [i for i in range(len(item_pools)) if i != 0]
            else:
                # Prevent assigning Shop Buy items to non-Shop locations
                if ignore_pools is None:
                    ignore_pools = [0]
                else:
                    ignore_pools.append(0)

            item = self.get_item(ignore_pools, item_pools, location, player_id, record, worlds)

            if location.type == 'Song' and item.type != 'Song':
                self.song_as_items = True
            location.world.push_item(location, item, True)

            if item.advancement:
                search = Search.max_explore([world.state for world in worlds], itertools.chain.from_iterable(item_pools))
                if not search.can_beat_game(False):
                    raise FillError('%s in world %d is not reachable without %s in world %d!' % (location.name, self.id + 1, item.name, player_id + 1))

    def get_item(self, ignore_pools: list[int], item_pools: list[list[Item]], location: Location, player_id: int,
                 record: LocationRecord, worlds: list[World]) -> Item:
        """Get or create the item specified by the record and replace something in the item pool with it

        :param ignore_pools: Pools to not replace items in
        :param item_pools: A list containing all the item pools.
        :param location: Location record currently being assigned an item
        :param player_id: Integer representing the current player's ID number
        :param record: Item record from the distribution file to assign to a location
        :param worlds: A list of the world objects that define the rules of each game world.
        :return: item
        """
        world = worlds[player_id]
        if ignore_pools:
            pool = [pool if i not in ignore_pools else [] for i, pool in enumerate(item_pools)]
        else:
            pool = item_pools
        try:
            item = self.pool_remove_item(pool, record.item, 1, world_id=player_id)[0]
        except KeyError:
            if location.type == 'Shop' and "Buy" in record.item:
                try:
                    removed_item = self.pool_remove_item(pool, "Buy *", 1, world_id=player_id)[0]
                    if removed_item.name in self.item_pool:
                        # Update item_pool after item is removed
                        if self.item_pool[removed_item.name].count == 1:
                            del self.item_pool[removed_item.name]
                        else:
                            self.item_pool[removed_item.name].count -= 1
                    item = ItemFactory([record.item], world=world)[0]
                except KeyError:
                    raise RuntimeError(f'Too many shop buy items were added to world {self.id + 1}, and not enough shop buy items are available in the item pool to be removed.')
            elif record.item in item_groups['Bottle']:
                try:
                    item = self.pool_replace_item(pool, "#Bottle", player_id, record.item, worlds)
                except KeyError:
                    raise RuntimeError(f'Too many bottles were added to world {self.id + 1}, and not enough bottles are available in the item pool to be removed.')
            elif record.item in item_groups['AdultTrade'] and not world.settings.adult_trade_shuffle:
                try:
                    item = self.pool_replace_item(pool, "#AdultTrade", player_id, record.item, worlds)
                except KeyError:
                    raise RuntimeError(f'Too many adult trade items were added to world {self.id + 1}, and not enough adult trade items are available in the item pool to be removed.')
            elif record.item in item_groups['ChildTrade'] and record.item not in world.settings.shuffle_child_trade:
                try:
                    item = self.pool_replace_item(pool, "#ChildTrade", player_id, record.item, worlds)
                except KeyError:
                    raise RuntimeError(f'Too many child trade items were added to world {self.id + 1}, and not enough child trade items are available in the item pool to be removed.')
            elif record.item == "Ice Arrows" and worlds[player_id].settings.blue_fire_arrows:
                raise ValueError('Cannot add Ice Arrows to item pool with Blue Fire Arrows enabled')
            elif record.item == "Blue Fire Arrows" and not worlds[player_id].settings.blue_fire_arrows:
                raise ValueError('Cannot add Blue Fire Arrows to item pool with Blue Fire Arrows disabled')
            else:
                try:
                    item = self.pool_replace_item(item_pools, "#Junk", player_id, record.item, worlds)
                except KeyError:
                    raise RuntimeError(f'Too many items were added to world {self.id + 1}, and not enough junk is available to be removed.')
                except IndexError:
                    raise RuntimeError(f'Unknown item {record.item!r} being placed on location {location} in world {self.id + 1}. {build_close_match(record.item, "item")}')
            # Update item_pool after item is replaced
            if item.name not in self.item_pool:
                self.item_pool[item.name] = ItemPoolRecord()
            else:
                self.item_pool[item.name].count += 1
        except IndexError:
            raise RuntimeError(f'Unknown item {record.item!r} being placed on location {location} in world {self.id + 1}. {build_close_match(record.item, "item")}')
        # Ensure pool copy is persisted to real pool
        for i, new_pool in enumerate(pool):
            if new_pool:
                item_pools[i] = new_pool
        return item

    def cloak(self, worlds: list[World], location_pools: list[list[Location]], model_pools: list[list[Item]]) -> None:
        for (name, record) in self.pattern_dict_items(self.locations):
            if record.model is None:
                continue

            player_id = self.id if record.player is None else record.player - 1
            world = worlds[player_id]

            try:
                location = LocationFactory(name)
            except KeyError:
                raise RuntimeError('Unknown location in world %d: %r. %s' % (world.id + 1, name, build_close_match(name, 'location')))
            if location.type == 'Boss':
                continue

            location = self.pull_item_or_location(location_pools, worlds[self.id], name, remove=False)
            if location is None:
                raise RuntimeError('Location already cloaked in world %d: %s' % (self.id + 1, name))
            model = self.pull_item_or_location(model_pools, world, record.model, remove=False)
            if model is None:
                raise RuntimeError('Unknown model in world %d: %s' % (self.id + 1, record.model))
            if can_cloak(location.item, model):
                location.item.looks_like_item = model

    def configure_gossip(self, spoiler: Spoiler, stone_ids: list[int]) -> None:
        for (name, record) in self.pattern_dict_items(self.gossip_stones):
            matcher = self.pattern_matcher(name)
            stone_id = pull_random_element([stone_ids], lambda id: matcher(gossipLocations[id].name))
            if stone_id is None:
                # Allow planning of explicit textids
                match = re.match(r"^(?:\$|x|0x)?([0-9a-f]{4})$", name, flags=re.IGNORECASE)
                if match:
                    stone_id = int(match[1], base=16)
                else:
                    raise RuntimeError('Gossip stone unknown or already assigned in world %d: %r. %s' % (self.id + 1, name, build_close_match(name, 'stone')))
            spoiler.hints[self.id][stone_id] = GossipText(text=record.text, colors=record.colors, prefix='')

    def give_items(self, world: World, save_context: SaveContext) -> None:
        # copy Triforce pieces to all worlds
        triforce_count = sum(
            world_dist.effective_starting_items[triforce_piece].count
            for world_dist in self.distribution.world_dists
            for triforce_piece in triforce_pieces
            if triforce_piece in world_dist.effective_starting_items
        )
        if triforce_count > 0:
            save_context.give_item(world, 'Triforce Piece', triforce_count)

        for (name, record) in self.effective_starting_items.items():
            if name in triforce_pieces or record.count == 0:
                continue
            save_context.give_item(world, name, record.count)

    def get_starting_item(self, item: str) -> int:
        items = self.settings.starting_items
        if item in items:
            return items[item].count
        else:
            return 0

    def configure_effective_starting_items(self, worlds: list[World], world: World) -> None:
        items = {item_name: record.copy() for item_name, record in self.settings.starting_items.items()}

        if world.settings.start_with_rupees:
            add_starting_item_with_ammo(items, 'Rupees', 999)
        if world.settings.start_with_consumables:
            add_starting_item_with_ammo(items, 'Deku Sticks', 99)
            add_starting_item_with_ammo(items, 'Deku Nuts', 99)

        skipped_locations: list[str] = []
        if world.settings.skip_reward_from_rauru:
            skipped_locations += ['ToT Reward from Rauru']
        if world.skip_child_zelda:
            skipped_locations += ['HC Zeldas Letter', 'Song from Impa']
        if world.settings.gerudo_fortress == 'open' and not world.settings.shuffle_gerudo_card:
            skipped_locations.append('Hideout Gerudo Membership Card')
        if world.settings.empty_dungeons_mode != 'none':
            skipped_locations_from_dungeons = []
            if world.settings.shuffle_dungeon_rewards in ('vanilla', 'reward', 'dungeon'):
                skipped_locations_from_dungeons += location_groups['Boss']
            if world.settings.shuffle_song_items in ('vanilla', 'song'):
                skipped_locations_from_dungeons += location_groups['Song']
            elif world.settings.shuffle_song_items == 'dungeon':
                skipped_locations_from_dungeons += location_groups['BossHeart']
            for location_name in skipped_locations_from_dungeons:
                location = world.get_location(location_name)
                hint_area = HintArea.at(location)
                if hint_area.is_dungeon and world.empty_dungeons[hint_area.dungeon_name].empty:
                    skipped_locations.append(location.name)
                    world.item_added_hint_types['barren'].append(location.item.name)
        for iter_world in worlds:
            for location in skipped_locations:
                loc = iter_world.get_location(location)
                if iter_world.id == world.id:
                    self.skipped_locations.append(loc)
                if loc.item is not None and world.id == loc.item.world.id:
                    add_starting_item_with_ammo(items, loc.item.name)

        effective_adult_trade_item_index = -1
        for item_name in items:
            if item_name in trade_items:
                if item_name in world.settings.adult_trade_start:
                    if trade_items.index(item_name) > effective_adult_trade_item_index:
                        effective_adult_trade_item_index = trade_items.index(item_name)
                else:
                    raise RuntimeError(f'An unshuffled trade item was included as a starting item. Please either remove {item_name} from starting items or add it to Adult Trade Sequence Items.')
            if item_name in child_trade_items:
                if item_name not in world.settings.shuffle_child_trade and item_name != 'Zeldas Letter':
                    raise RuntimeError(f'An unshuffled trade item was included as a starting item. Please either remove {item_name} from starting items or add it to Shuffled Child Trade Sequence Items.')

        if effective_adult_trade_item_index >= 0:
            world.adult_trade_starting_inventory = trade_items[effective_adult_trade_item_index]

        self.effective_starting_items = items


class Distribution:
    def __init__(self, settings: Settings, src_dict: Optional[dict[str, Any]] = None) -> None:
        self.file_hash: Optional[list[str]] = None
        self.playthrough: Optional[dict[str, dict[str, LocationRecord]]] = None
        self.entrance_playthrough: Optional[dict[str, dict[str, EntranceRecord]]] = None

        self.src_dict: dict[str, Any] = src_dict or {}
        self.settings: Settings = settings
        self.search_groups: dict[str, Sequence[str]] = {
            **location_groups,
            **item_groups,
        }
        if self.src_dict:
            if 'custom_groups' in self.src_dict:
                self.search_groups.update(self.src_dict['custom_groups'])
            if 'starting_items' in self.src_dict:
                raise ValueError('"starting_items" at the top level is no longer supported, please move it into "settings"')

        self.world_dists: list[WorldDistribution] = [WorldDistribution(self, id) for id in range(settings.world_count)]
        # One-time init
        update_dict = {
            'file_hash': (self.src_dict.get('file_hash', []) + [None, None, None, None, None])[0:5],
            'playthrough': None,
            'playthrough_locations': None,
            'entrance_playthrough': None,
            '_settings': self.src_dict.get('settings', {}),
        }

        # If the plando is using the GUI-based ("legacy") starting items settings, start with a fresh starting_items dict.
        if not update_dict['_settings'].get('starting_items', None):
            if (update_dict['_settings'].get('starting_equipment', None) or update_dict['_settings'].get('starting_inventory', None)
                    or update_dict['_settings'].get('starting_songs', None)):
                update_dict['_settings']['starting_items'] = {}

        self.settings.update(update_dict['_settings'])
        if 'settings' in self.src_dict:
            validate_settings(self.src_dict['settings'])
            self.src_dict['_settings'] = self.src_dict['settings']
            del self.src_dict['settings']

        self.__dict__.update(update_dict)

        # Init we have to do every time we retry
        self.reset()

    # adds the location entry only if there is no record for that location already
    def add_location(self, new_location: str, new_item: str) -> None:
        for world_dist in self.world_dists:
            try:
                world_dist.add_location(new_location, new_item)
            except KeyError:
                print('Cannot place item at excluded location because it already has an item defined in the Distribution.')

    def fill(self, worlds: list[World], location_pools: list[list[Location]], item_pools: list[list[Item]]) -> None:
        search = Search.max_explore([world.state for world in worlds], itertools.chain.from_iterable(item_pools))
        if not search.can_beat_game(False):
            raise FillError('Item pool does not contain items required to beat game!')

        for world_dist in self.world_dists:
            world_dist.fill(worlds, location_pools, item_pools)

    def cloak(self, worlds: list[World], location_pools: list[list[Location]], model_pools: list[list[Item]]) -> None:
        for world_dist in self.world_dists:
            world_dist.cloak(worlds, location_pools, model_pools)

    def configure_triforce_hunt(self, worlds: list[World]) -> None:
        total_count = 0
        total_starting_count = 0
        for world in worlds:
            for triforce_piece in triforce_pieces:
                if triforce_piece in world.settings.starting_items:
                    total_starting_count += world.settings.starting_items[triforce_piece].count
                #TODO add starting pieces from other skipped checks (Links Pocket, pre-completed dungeons)
                if world.skip_child_zelda and 'Song from Impa' in world.distribution.locations and world.distribution.locations['Song from Impa'].item == triforce_piece:
                    total_starting_count += 1
            if world.settings.triforce_hunt:
                total_count += world.triforce_count_per_world
                if world.settings.triforce_hunt_mode == 'ice_percent': #TODO instead of hardcoding Ice%, scan filled locations
                    total_count += 1

        if total_starting_count >= world.triforce_goal:
            raise RuntimeError('Too many Triforce Pieces in starting items. There should be at most %d and there are %d.' % (world.triforce_goal - 1, total_starting_count))

        for world in worlds:
            world.total_starting_triforce_count = total_starting_count # used later in Rules.py

    def reset(self) -> None:
        for world in self.world_dists:
            world.update({}, update_all=True)
            world.settings = self.settings.copy()

        world_names = ['World %d' % (i + 1) for i in range(len(self.world_dists))]

        for k in per_world_keys:
            if k == 'settings':
                if '_settings' in self.src_dict:
                    # For each entry here of the form 'World %d', apply that entry to that world.
                    # If there are any entries that aren't of this form,
                    # apply them all to each world.
                    for world_id, world_name in enumerate(world_names):
                        if world_name in self.src_dict['_settings']:
                            self.world_dists[world_id].settings.settings_dict.update(self.src_dict['_settings'][world_name])
            # Anything starting with ':' is output-only and we ignore it in world.update anyway.
            elif k in self.src_dict and k[0] != ':':
                if isinstance(self.src_dict[k], dict):
                    # For each entry here of the form 'World %d', apply that entry to that world.
                    # If there are any entries that aren't of this form,
                    # apply them all to each world.
                    for world_id, world_name in enumerate(world_names):
                        if world_name in self.src_dict[k]:
                            self.world_dists[world_id].update({k: self.src_dict[k][world_name]})
                    src_all = {key: val for key, val in self.src_dict[k].items() if key not in world_names}
                    if src_all:
                        for world in self.world_dists:
                            world.update({k: src_all})
                else:
                    # Since it's not by world, apply to all worlds.
                    for world in self.world_dists:
                        world.update({k: self.src_dict[k]})

        for world in self.world_dists:
            # normalize starting items to use the dictionary format
            starting_items = itertools.chain(world.settings.starting_equipment, world.settings.starting_songs, world.settings.starting_inventory)
            data: dict[str, StarterRecord | dict[str, StarterRecord]] = defaultdict(lambda: StarterRecord(0))
            if isinstance(world.settings.starting_items, dict) and world.settings.starting_items:
                for name, record in world.settings.starting_items.items():
                    data[name] = record if isinstance(record, StarterRecord) else StarterRecord(record)
                add_starting_ammo(data)
            else:
                starting_items = itertools.chain(world.settings.starting_equipment, world.settings.starting_songs, world.settings.starting_inventory)
            for itemsetting in starting_items:
                if itemsetting in StartingItems.everything:
                    item = StartingItems.everything[itemsetting]
                    if not item.special:
                        add_starting_item_with_ammo(data, item.item_name)
                    else:
                        if item.item_name == 'Rutos Letter' and world.settings.zora_fountain != 'open':
                            data['Rutos Letter'].count += 1
                        elif item.item_name in ('Bottle', 'Rutos Letter'):
                            data['Bottle'].count += 1
                        else:
                            raise KeyError(f"invalid special item: {item.item_name}")
                else:
                    raise KeyError(f"invalid starting item: {itemsetting}")
            world.settings.starting_equipment = []
            world.settings.starting_songs = []
            world.settings.starting_inventory = []
            # add hearts
            if world.settings.starting_hearts > 3 and 'Piece of Heart' not in world.settings.starting_items and 'Heart Container' not in world.settings.starting_items:
                num_hearts_to_collect = world.settings.starting_hearts - 3
                if world.settings.item_pool_value in ('plentiful', 'ludicrous'):
                    if world.settings.starting_hearts >= 20:
                        num_hearts_to_collect -= 1
                        data['Piece of Heart'].count += 4
                    data['Heart Container'].count += num_hearts_to_collect
                else:
                    # evenly split the difference between heart pieces and heart containers removed from the pool,
                    # removing an extra 4 pieces in case of an odd number since there's 9*4 of them but only 8 containers
                    data['Piece of Heart'].count += 4 * math.ceil(num_hearts_to_collect / 2)
                    data['Heart Container'].count += math.floor(num_hearts_to_collect / 2)
            world.settings.starting_items = data

    def to_json(self, include_output: bool = True, spoiler: bool = True) -> dict[str, Any]:
        self_dict = {
            ':version': __version__,
            'file_hash': CollapseList(self.file_hash),
            ':seed': self.settings.seed,
            ':settings_string': self.settings.settings_string,
            ':enable_distribution_file': self.settings.enable_distribution_file,
        }

        world_dist_dicts = [world_dist.to_json() for world_dist in self.world_dists]
        if self.settings.world_count > 1:
            for k in per_world_keys:
                if spoiler or k == 'settings':
                    self_dict[k] = {}
                    for id, world_dist_dict in enumerate(world_dist_dicts):
                        self_dict[k]['World %d' % (id + 1)] = world_dist_dict[k]
        else:
            self_dict.update({k: world_dist_dicts[0][k] for k in per_world_keys if spoiler or k == 'settings'})

        if spoiler:
            if self.playthrough is not None:
                self_dict[':playthrough'] = AlignedDict({
                    sphere_nr: SortedDict({
                        name: record.to_json() for name, record in sphere.items()
                    })
                    for (sphere_nr, sphere) in self.playthrough.items()
                }, depth=2)

            if self.playthrough_locations is not None:
                self_dict[':playthrough_locations'] = {
                    name: [rec.to_json() for rec in record] if is_pattern(name) else record.to_json() for (name, record) in self.playthrough_locations.items()
                }

            if self.entrance_playthrough is not None and len(self.entrance_playthrough) > 0:
                self_dict[':entrance_playthrough'] = AlignedDict({
                    sphere_nr: SortedDict({
                        name: record.to_json() for name, record in sphere.items()
                    })
                    for (sphere_nr, sphere) in self.entrance_playthrough.items()
                }, depth=2)

        if not include_output:
            strip_output_only(self_dict)
            self_dict['settings'] = dict(self._settings)
        return self_dict

    def to_str(self, include_output_only: bool = True, spoiler: bool = True) -> str:
        return dump_obj(self.to_json(include_output_only, spoiler))

    def __str__(self) -> str:
        return dump_obj(self.to_json())

    def update_spoiler(self, spoiler: Spoiler, output_spoiler: bool) -> None:
        self.file_hash = [HASH_ICONS[icon] for icon in spoiler.file_hash]

        if not output_spoiler:
            return

        spoiler.parse_data()

        for world in spoiler.worlds:
            world_dist = self.world_dists[world.id]
            world_dist.randomized_settings = {randomized_item: getattr(world.settings, randomized_item) for randomized_item in world.randomized_list}
            world_dist.dungeons = {dung: DungeonRecord({ 'mq': world.dungeon_mq[dung] }) for dung in world.dungeon_mq}
            world_dist.empty_dungeons = {dung: EmptyDungeonRecord({ 'empty': world.empty_dungeons[dung].empty }) for dung in world.empty_dungeons}
            world_dist.trials = {trial: TrialRecord({ 'active': not world.skipped_trials[trial] }) for trial in world.skipped_trials}
            if hasattr(world, 'song_notes'):
                world_dist.songs = {song: SongRecord({ 'notes': str(world.song_notes[song]) }) for song in world.song_notes}
            world_dist.entrances = {ent.name: EntranceRecord.from_entrance(ent) for ent in spoiler.entrances[world.id]}
            world_dist.locations = {loc: LocationRecord.from_item(item) for (loc, item) in spoiler.locations[world.id].items()}
            world_dist.woth_locations = {loc.name: LocationRecord.from_item(loc.item) for loc in spoiler.required_locations[world.id]}
            world_dist.goal_locations = {}
            if world.id in spoiler.goal_locations and spoiler.goal_locations[world.id]:
                for cat_name, goals in spoiler.goal_locations[world.id].items():
                    world_dist.goal_locations[cat_name] = {}
                    for goal_name, location_worlds in goals.items():
                        goal = spoiler.goal_categories[world.id][cat_name].get_goal(goal_name)
                        goal_text = goal.hint_text.replace('#', '')
                        goal_text = goal_text[0].upper() + goal_text[1:]
                        # Add Token/Triforce Piece/heart reachability data
                        if goal.items[0]['name'] == 'Triforce Piece':
                            goal_text +=  ' (' + str(goal.items[0]['quantity']) + '/' + str(world.triforce_count) + ' reachable)'
                        if goal.items[0]['name'] == 'Gold Skulltula Token':
                            goal_text +=  ' (' + str(goal.items[0]['quantity']) + '/100 reachable)'
                        if goal.items[0]['name'] == 'Piece of Heart':
                            goal_text +=  ' (' + str(goal.items[0]['quantity']) + '/68 reachable)' #TODO adjust total based on starting_hearts?
                        world_dist.goal_locations[cat_name][goal_text] = {}
                        for location_world, locations in location_worlds.items():
                            if len(self.world_dists) == 1:
                                world_dist.goal_locations[cat_name][goal_text] = {loc.name: LocationRecord.from_item(loc.item).to_json() for loc in locations}
                            else:
                                world_dist.goal_locations[cat_name][goal_text]['from World ' + str(location_world + 1)] = {loc.name: LocationRecord.from_item(loc.item).to_json() for loc in locations}
            world_dist.barren_regions = list(map(str, world.empty_areas))
            world_dist.gossip_stones = {}
            for loc in spoiler.hints[world.id]:
                hint = GossipRecord(spoiler.hints[world.id][loc].to_json())
                if loc in gossipLocations:
                    world_dist.gossip_stones[gossipLocations[loc].name] = hint
                else:
                    world_dist.gossip_stones["0x{:04X}".format(loc)] = hint

        self.playthrough = {}
        for (sphere_nr, sphere) in spoiler.playthrough.items():
            loc_rec_sphere = {}
            self.playthrough[sphere_nr] = loc_rec_sphere
            for location in sphere:
                if spoiler.settings.world_count > 1:
                    location_key = '%s [W%d]' % (location.name, location.world.id + 1)
                else:
                    location_key = location.name

                loc_rec_sphere[location_key] = LocationRecord.from_item(location.item)


        self.playthrough_locations = {}
        for (location, item) in spoiler.playthrough_locations.items():
            if spoiler.settings.world_count > 1:
                location_key = '%s [W%d]' % (location.name, location.world.id + 1)
            else:
                location_key = location.name
            self.playthrough_locations[location_key] = LocationRecord.from_item(location.item)

        self.entrance_playthrough = {}
        for (sphere_nr, sphere) in spoiler.entrance_playthrough.items():
            if len(sphere) > 0:
                ent_rec_sphere = {}
                self.entrance_playthrough[sphere_nr] = ent_rec_sphere
                for entrance in sphere:
                    if spoiler.settings.world_count > 1:
                        entrance_key = '%s [W%d]' % (entrance.name, entrance.world.id + 1)
                    else:
                        entrance_key = entrance.name

                    ent_rec_sphere[entrance_key] = EntranceRecord.from_entrance(entrance)

    @staticmethod
    def from_file(settings: Settings, filename: str) -> Distribution:
        if any(map(filename.endswith, ['.z64', '.n64', '.v64'])):
            raise InvalidFileException("Your Ocarina of Time ROM doesn't belong in the plandomizer setting. If you don't know what plandomizer is, or don't plan to use it, leave that setting blank and try again.")

        try:
            with open(filename, encoding='utf-8') as infile:
                src_dict = json.load(infile)
        except json.decoder.JSONDecodeError as e:
            raise InvalidFileException(f"Invalid Plandomizer File. Make sure the file is a valid JSON file. Failure reason: {str(e)}") from None
        return Distribution(settings, src_dict)

    def to_file(self, filename: str, output_spoiler: bool) -> None:
        json = self.to_str(spoiler=output_spoiler)
        with open(filename, 'w', encoding='utf-8') as outfile:
            outfile.write(json)


def add_starting_ammo(starting_items: dict[str, StarterRecord]) -> None:
    for item in StartingItems.inventory.values():
        if item.item_name in starting_items and item.ammo:
            for ammo, qty in item.ammo.items():
                # Add ammo to starter record, but not overriding existing count if present
                if ammo not in starting_items:
                    starting_items[ammo] = StarterRecord(0)
                    starting_items[ammo].count = qty[starting_items[item.item_name].count - 1]


def add_starting_item_with_ammo(starting_items: dict[str, StarterRecord], item_name: str, count: int = 1) -> None:
    if item_name not in starting_items:
        starting_items[item_name] = StarterRecord(0)
    starting_items[item_name].count += count
    for item in StartingItems.inventory.values():
        if item.item_name == item_name and item.ammo:
            for ammo, qty in item.ammo.items():
                if ammo not in starting_items:
                    starting_items[ammo] = StarterRecord(0)
                starting_items[ammo].count = qty[starting_items[item_name].count - 1]
            break


def strip_output_only(obj: list | dict) -> None:
    if isinstance(obj, list):
        for elem in obj:
            strip_output_only(elem)
    elif isinstance(obj, dict):
        output_only_keys = [key for key in obj if is_output_only(key)]
        for key in output_only_keys:
            del obj[key]
        for elem in obj.values():
            strip_output_only(elem)


def can_cloak(actual_item: Item, model: Item) -> bool:
    return actual_item.index == 0x7C  # Ice Trap


def is_output_only(pattern: str) -> bool:
    return pattern.startswith(':')


def is_pattern(pattern: str) -> bool:
    return pattern.startswith('!') or pattern.startswith('*') or pattern.startswith('#') or pattern.endswith('*')


def pull_first_element(pools: list[list[Any]], predicate: Callable[[Any], bool] = lambda k: True, remove: bool = True) -> Optional[Any]:
    for pool in pools:
        for element in pool:
            if predicate(element):
                if remove:
                    pool.remove(element)
                return element
    return None


def pull_random_element(pools: list[list[Any]], predicate: Callable[[Any], bool] = lambda k: True, remove: bool = True) -> Optional[Any]:
    candidates = [(element, pool) for pool in pools for element in pool if predicate(element)]
    if len(candidates) == 0:
        return None
    element, pool = random.choice(candidates)
    if remove:
        pool.remove(element)
    return element


def pull_all_elements(pools: list[list[Any]], predicate: Callable[[Any], bool] = lambda k: True, remove: bool = True) -> Optional[list[Any]]:
    elements = []
    for pool in pools:
        for element in pool:
            if predicate(element):
                if remove:
                    pool.remove(element)
                elements.append(element)

    if len(elements) == 0:
        return None
    return elements