from collections import Counter
from collections.abc import Callable
from typing import TYPE_CHECKING

from .events import Event, LocationClearedEvent, VictoryEvent
from .gameboard import Gameboard
from .graphics import Graphic
from .inputs import Direction
from .items import Item


class Player:
    current_x: int
    current_y: int
    current_health: int

    has_won: bool = False

    facing: Direction

    inventory: Counter[Item]

    gameboard: Gameboard
    push_event: Callable[[Event], None]

    def __init__(self, gameboard: Gameboard, push_event: Callable[[Event], None]) -> None:
        self.gameboard = gameboard
        self.inventory = Counter()
        self.push_event = push_event
        self.respawn()

    def respawn(self) -> None:
        self.current_x = 4
        self.current_y = 9
        self.current_health = self.max_health
        self.facing = Direction.DOWN

    @property
    def max_health(self) -> int:
        return 2 + 2 * self.inventory[Item.HEALTH_UPGRADE]

    def render(self) -> Graphic:
        if not self.gameboard.ready:
            return Graphic.EMPTY

        if self.facing == Direction.LEFT:
            return Graphic.PLAYER_LEFT
        if self.facing == Direction.UP:
            return Graphic.PLAYER_UP
        if self.facing == Direction.RIGHT:
            return Graphic.PLAYER_RIGHT
        return Graphic.PLAYER_DOWN

    def receive_item(self, item: Item) -> None:
        assert item != Item.REMOTE_ITEM, "Player should not directly receive the remote item"

        self.inventory[item] += 1
        if item == Item.HEALTH_UPGRADE:
            self.current_health += 2

    def has_item(self, item: Item) -> bool:
        return self.inventory[item] > 0

    def remove_item(self, item: Item) -> None:
        self.inventory[item] -= 1

    def damage(self, damage: int) -> None:
        if self.has_item(Item.SHIELD):
            damage = damage // 2

        self.current_health = max(0, self.current_health - damage)

        if self.current_health <= 0:
            self.die()

    def die(self) -> None:
        self.respawn()
        self.gameboard.respawn_final_boss()
        self.gameboard.heal_alive_enemies()

    def location_cleared(self, location_id: int) -> None:
        event = LocationClearedEvent(location_id)
        self.push_event(event)

    def victory(self) -> None:
        self.has_won = True
        event = VictoryEvent()
        self.push_event(event)