from typing import TYPE_CHECKING

import BaseClasses
from BaseClasses import Region, ItemClassification, Entrance
from entrance_rando import randomize_entrances
from .items import Lingo2Item
from .locations import Lingo2Location
from .player_logic import AccessRequirements
from .rules import make_location_lambda

if TYPE_CHECKING:
    from . import Lingo2World


def create_region(room, world: "Lingo2World") -> Region:
    return Region(world.static_logic.get_room_region_name(room.id), world.player, world.multiworld)


def create_locations(room, new_region: Region, world: "Lingo2World", regions: dict[str, Region]):
    for location in world.player_logic.locations_by_room.get(room.id, {}):
        reqs = location.reqs.copy()
        reqs.remove_room(new_region.name)

        new_location = Lingo2Location(world.player, world.static_logic.location_id_to_name[location.code],
                                      location.code, new_region)
        new_location.access_rule = make_location_lambda(reqs, world, regions)
        new_region.locations.append(new_location)

    for event_name, item_name in world.player_logic.event_loc_item_by_room.get(room.id, {}).items():
        new_location = Lingo2Location(world.player, event_name, None, new_region)
        if world.for_tracker and item_name == "Victory":
            new_location.goal = True

        event_item = Lingo2Item(item_name, ItemClassification.progression, None, world.player)
        new_location.place_locked_item(event_item)
        new_region.locations.append(new_location)

    if world.for_tracker and world.options.shuffle_worldports:
        for port_id in room.ports:
            port = world.static_logic.objects.ports[port_id]
            if port.no_shuffle:
                continue

            new_location = Lingo2Location(world.player, f"Worldport {port.id} Entered", None, new_region)
            new_location.port_id = port.id

            if port.HasField("required_door"):
                new_location.access_rule = \
                    make_location_lambda(world.player_logic.get_door_open_reqs(port.required_door), world, regions)

            new_region.locations.append(new_location)


def create_regions(world: "Lingo2World"):
    regions = {
        "Menu": Region("Menu", world.player, world.multiworld)
    }

    region_and_room = []

    # Create the regions in two stages. First, make the actual region objects and memoize them. Then, add all of the
    # locations. This allows us to reference the actual region objects in the access rules for the locations, which is
    # faster than having to look them up during access checking.
    for room in world.static_logic.objects.rooms:
        region = create_region(room, world)
        regions[region.name] = region
        region_and_room.append((region, room))

    for (region, room) in region_and_room:
        create_locations(room, region, world, regions)

    regions["Menu"].connect(regions["The Entry - Starting Room"], "Start Game")

    for connection in world.static_logic.objects.connections:
        if connection.roof_access and not world.options.daedalus_roof_access:
            continue

        if connection.vanilla_only and world.options.shuffle_doors:
            continue

        from_region = world.static_logic.get_room_region_name(connection.from_room)
        to_region = world.static_logic.get_room_region_name(connection.to_room)

        if from_region not in regions or to_region not in regions:
            continue

        connection_name = f"{from_region} -> {to_region}"

        reqs = AccessRequirements()

        if connection.HasField("required_door"):
            reqs.merge(world.player_logic.get_door_open_reqs(connection.required_door))

            door = world.static_logic.objects.doors[connection.required_door]
            wmap = world.static_logic.objects.maps[door.map_id]
            connection_name = f"{connection_name} (using {wmap.name} - {door.name})"

        if connection.HasField("port"):
            port = world.static_logic.objects.ports[connection.port]
            connection_name = f"{connection_name} (via {port.display_name})"

            if world.options.shuffle_worldports and not port.no_shuffle:
                continue

            if port.HasField("required_door"):
                reqs.merge(world.player_logic.get_door_open_reqs(port.required_door))

        if connection.HasField("painting"):
            painting = world.static_logic.objects.paintings[connection.painting]
            connection_name = f"{connection_name} (via painting {painting.name})"

            if painting.HasField("required_door"):
                reqs.merge(world.player_logic.get_door_open_reqs(painting.required_door))

        if connection.HasField("panel"):
            proxy = connection.panel
            reqs.merge(world.player_logic.get_panel_reqs(proxy.panel,
                                                         proxy.answer if proxy.HasField("answer") else None))

            panel = world.static_logic.objects.panels[proxy.panel]
            if proxy.HasField("answer"):
                connection_name = f"{connection_name} (via panel {panel.name}/{proxy.answer})"
            else:
                connection_name = f"{connection_name} (via panel {panel.name})"

        if connection.HasField("purple_ending") and connection.purple_ending and world.options.strict_purple_ending:
            world.player_logic.add_solution_reqs(reqs, "abcdefghijklmnopqrstuvwxyz")

        if connection.HasField("cyan_ending") and connection.cyan_ending and world.options.strict_cyan_ending:
            world.player_logic.add_solution_reqs(reqs, "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz")

        reqs.simplify()
        reqs.remove_room(from_region)

        if to_region in reqs.rooms:
            # This connection can't ever increase access because you're required to have access to the other side in
            # order for it to be usable. We will just not create the connection at all, in order to help GER figure out
            # what regions are dead ends.
            continue

        connection = Entrance(world.player, connection_name, regions[from_region])
        connection.access_rule = make_location_lambda(reqs, world, regions)

        regions[from_region].exits.append(connection)
        connection.connect(regions[to_region])

        for region in reqs.get_referenced_rooms():
            world.multiworld.register_indirect_condition(regions[region], connection)

    world.multiworld.regions += regions.values()


def shuffle_entrances(world: "Lingo2World"):
    er_entrances: list[Entrance] = []
    er_exits: list[Entrance] = []

    port_id_by_name: dict[str, int] = {}

    for port in world.static_logic.objects.ports:
        if port.no_shuffle:
            continue

        port_region_name = world.static_logic.get_room_region_name(port.room_id)
        port_region = world.multiworld.get_region(port_region_name, world.player)

        connection_name = f"{port_region_name} - {port.display_name}"
        port_id_by_name[connection_name] = port.id

        entrance = port_region.create_er_target(connection_name)
        entrance.randomization_type = BaseClasses.EntranceType.TWO_WAY

        er_exit = port_region.create_exit(connection_name)
        er_exit.randomization_type = BaseClasses.EntranceType.TWO_WAY

        if port.HasField("required_door"):
            door_reqs = world.player_logic.get_door_open_reqs(port.required_door)
            er_exit.access_rule = make_location_lambda(door_reqs, world, None)

            for region in door_reqs.get_referenced_rooms():
                world.multiworld.register_indirect_condition(world.multiworld.get_region(region, world.player),
                                                             er_exit)

        er_entrances.append(entrance)
        er_exits.append(er_exit)

    result = randomize_entrances(world, True, {0:[0]}, False, er_entrances,
                                 er_exits)

    for (f, to) in result.pairings:
        world.port_pairings[port_id_by_name[f]] = port_id_by_name[to]


def connect_ports_from_ut(port_pairings: dict[int, int], world: "Lingo2World"):
    for fpid, tpid in port_pairings.items():
        from_port = world.static_logic.objects.ports[fpid]
        to_port = world.static_logic.objects.ports[tpid]

        from_region_name = world.static_logic.get_room_region_name(from_port.room_id)
        to_region_name = world.static_logic.get_room_region_name(to_port.room_id)

        from_region = world.multiworld.get_region(from_region_name, world.player)
        to_region = world.multiworld.get_region(to_region_name, world.player)

        connection = Entrance(world.player, f"{from_region_name} - {from_port.display_name}", from_region)

        reqs = AccessRequirements()
        if from_port.HasField("required_door"):
            reqs = world.player_logic.get_door_open_reqs(from_port.required_door).copy()

        if world.for_tracker:
            reqs.items.add(f"Worldport {fpid} Entered")

        if not reqs.is_empty():
            connection.access_rule = make_location_lambda(reqs, world, None)

            for region in reqs.get_referenced_rooms():
                world.multiworld.register_indirect_condition(world.multiworld.get_region(region, world.player),
                                                             connection)

        from_region.exits.append(connection)
        connection.connect(to_region)