from enum import Enum
from random import random, randint

from pygame import Surface, draw, Rect, image

from engine.entity import Entity
from engine.resources import res
from engine.components.collide_rect import CollideRect
from engine.components.sprite import Sprite

from .common import S
from .pacdot import PacDot


class Direction(Enum):
    UP =  1
    DOWN = 2
    LEFT = 3
    RIGHT = 4


class Ghost(Entity):
    SPEED = 1

    def __init__(self, x, y):
        super().__init__(self.__repr__())
        sprite = Sprite(image.load(res('ghost.png')).convert(), 2)
        self.add(sprite)
        self.phys = CollideRect(Rect(self.x, self.y,
                                     sprite.width, sprite.width),
                                static=False,
                                solid=False,
                                cb=self.on_col)
        self.add(self.phys)
        self.script = Ghost.script
        self.x = x
        self.y = y
        self.direction = Direction(randint(1, 4))

    def on_col(self, c):
        if isinstance(c.parent, PacDot):
            return

        if c.parent.name == 'pacman':
            print('Perdu !')
            exit(0)

        if self.direction == Direction.UP:
            self.direction = Direction.RIGHT if random() < .5 \
                else Direction.LEFT
            return
        if self.direction == Direction.RIGHT:
            self.direction = Direction.DOWN if random() < .5 \
                else Direction.UP
            return
        if self.direction == Direction.DOWN:
            self.direction = Direction.LEFT if random() < .5 \
                else Direction.RIGHT
            return
        if self.direction == Direction.LEFT:
            self.direction = Direction.UP if random() < .5 \
                else Direction.DOWN
            return

    def script(self):
        if self.direction == Direction.UP:
            self.phys.vy = -Ghost.SPEED
            self.phys.vx = 0
        elif self.direction == Direction.DOWN:
            self.phys.vy = Ghost.SPEED
            self.phys.vx = 0
        elif self.direction == Direction.LEFT:
            self.phys.vx = -Ghost.SPEED
            self.phys.vy = 0
        elif self.direction == Direction.RIGHT:
            self.phys.vx = Ghost.SPEED
            self.phys.vy = 0