import sys
from typing import Any

from .display.display import Display
from .display.mapdisplay import MapDisplay
from .display.menudisplay import MenuDisplay
from .display.texturepack import TexturePack
from .entities.player import Player
from .interfaces import Map
from .settings import Settings
from enum import Enum, auto
from . import menus


class GameMode(Enum):
    MAINMENU = auto()
    PLAY = auto()
    SETTINGS = auto()
    INVENTORY = auto()


class KeyValues(Enum):
    UP = auto()
    DOWN = auto()
    LEFT = auto()
    RIGHT = auto()
    ENTER = auto()
    SPACE = auto()


class Game:
    map: Map
    player: Player
    menu_display: MenuDisplay
    map_display: MapDisplay
    current_display: Display

    def __init__(self) -> None:
        self.state = GameMode.MAINMENU
        self.main_menu = menus.MainMenu()
        self.settings = Settings()
        self.settings.load_settings()
        self.settings.write_settings()

    def new_game(self, screen: Any) -> None:
        # TODO generate a new map procedurally
        self.map = Map.load("example_map.txt")
        self.player = Player()
        self.player.move(1, 6)
        self.map.add_entity(self.player)
        self.menu_display = MenuDisplay(screen, self.main_menu, 0, 0)
        self.map_display = MapDisplay(
            screen, self.map, self.player,
            TexturePack.get_pack(self.settings.TEXTURE_PACK))
        self.current_display = self.menu_display

    @staticmethod
    def load_game(filename: str) -> None:
        # TODO loading map from a file
        raise NotImplementedError()

    def run(self, screen: Any) -> None:
        while True:
            screen.clear()
            screen.refresh()
            # self.d.display(self.player.y, self.player.x)
            self.current_display.refresh()
            key = screen.getkey()
            self.handle_key_pressed(self.translate_key(key))

    def translate_key(self, key: str) -> KeyValues:
        if key in (self.settings.KEY_DOWN_SECONDARY,
                   self.settings.KEY_DOWN_PRIMARY):
            return KeyValues.DOWN
        elif key in (self.settings.KEY_LEFT_PRIMARY,
                     self.settings.KEY_LEFT_SECONDARY):
            return KeyValues.LEFT
        elif key in (self.settings.KEY_RIGHT_PRIMARY,
                     self.settings.KEY_RIGHT_SECONDARY):
            return KeyValues.RIGHT
        elif key in (self.settings.KEY_UP_PRIMARY,
                     self.settings.KEY_UP_SECONDARY):
            return KeyValues.UP
        elif key == self.settings.KEY_ENTER:
            return KeyValues.ENTER
        elif key == ' ':
            return KeyValues.SPACE

    def handle_key_pressed(self, key: KeyValues) -> None:
        if self.state == GameMode.PLAY:
            self.handle_key_pressed_play(key)
        elif self.state == GameMode.MAINMENU:
            self.handle_key_pressed_main_menu(key)
        elif self.state == GameMode.SETTINGS:
            self.handle_key_pressed_settings(key)
        self.current_display.refresh()

    def handle_key_pressed_play(self, key: KeyValues) -> None:
        if key == KeyValues.UP:
            self.player.move_up()
        elif key == KeyValues.DOWN:
            self.player.move_down()
        elif key == KeyValues.LEFT:
            self.player.move_left()
        elif key == KeyValues.RIGHT:
            self.player.move_right()
        elif key == KeyValues.SPACE:
            self.state = GameMode.MAINMENU
            self.current_display = self.menu_display

    def handle_key_pressed_main_menu(self, key: KeyValues) -> None:
        if key == KeyValues.DOWN:
            self.main_menu.go_down()
        if key == KeyValues.UP:
            self.main_menu.go_up()
        if key == KeyValues.ENTER:
            option = self.main_menu.validate()
            if option == menus.MainMenuValues.START:
                self.state = GameMode.PLAY
                self.current_display = self.map_display
            elif option == menus.MainMenuValues.SETTINGS:
                self.state = GameMode.SETTINGS
            elif option == menus.MainMenuValues.EXIT:
                sys.exit(0)

    def handle_key_pressed_settings(self, key: KeyValues) -> None:
        if key == KeyValues.SPACE:
            self.state = GameMode.MAINMENU
            self.current_display = self.menu_display