from engine.resources import res
from engine.scene import Scene
from engine.entity import Entity
from engine.components.sprite import Sprite
from engine.components.collide_rect import CollideRect
from engine.servers.graphics import GraphicsServer
from pygame import Rect
from pygame import image
from pygame import Surface
from pygame import draw
from pygame.locals import *
from pygame import key
from itertools import product


S=20


entities=[]


class PacDot(Entity):
    s = Surface((S, S))
    draw.circle(s, (255, 255, 0), (S//2, S//2), S//4)

    def __init__(self):
        super().__init__()
        CollideRect(self, Rect(0, 0, S, S),
                    static=True, solid=False, cb=self.cb)
        Sprite(self, PacDot.s, 1)

    def cb(self):
        self.unregister()


class Level(Entity):
    def __init__(self, path):
        super().__init__()
        desc = image.load(res(path))
        w, h = desc.get_size()
        GraphicsServer().resize((w * S, h * S))
        self.surf = Surface((w * S, h * S)).convert()
        self.surf.fill((0, 0, 0))
        wall = Surface((S, S)).convert()
        wall.fill((0, 0, 255))
        for x, y in product(range(w), range(h)):
            col = desc.get_at((x, y))
            if col == (0, 0, 255):
                CollideRect(self, Rect(x * S, y * S, S, S))
                self.surf.blit(wall, (x * S, y * S))
            elif col == (139, 139, 139):
                pc = PacDot()
                pc.x = x * S
                pc.y = y * S
                entities.append(pc)
        Sprite(self, self.surf, 0)


class MovingEntity(Entity):
    def __init__(self, surf):
        super().__init__()
        sprite = Sprite(self, surf, 2)
        self.phys = CollideRect(
            self,
            Rect(self.x, self.y, sprite.width, sprite.width),
            static=False)


class Ghost(MovingEntity):
    def update_ghost():
        pass

    def __init__(self):
        super().__init__(image.load(res('ghost.png')).convert())
        self.script = update_ghost()


class Lvl0(Scene):
    def load(self):
        T = 1
        v = 2

        pac_surf = Surface((S//T, S//T)).convert()
        pac_surf.fill((0, 0, 0))
        draw.circle(pac_surf, (255, 255, 0), (S//(2*T), S//(2*T)), S//(2*T))
        pacman = MovingEntity(pac_surf)
        def pacman_script(entity):
            p = pacman.phys
            inputs = key.get_pressed()
            if T > 1:
                p.vx = 0
                p.vy = 0
            if inputs[K_UP]:
                p.vy = -v
            if inputs[K_DOWN]:
                p.vy = v
            if inputs[K_LEFT]:
                p.vx = -v
            if inputs[K_RIGHT]:
                p.vx = v
        pacman.script = pacman_script
        pacman.x = pacman.phys.rect.x = S*1
        pacman.y = pacman.phys.rect.y = S*1

        pacman.phys.rect.w = S//T
        pacman.phys.rect.h = S//T

        self.entities.append(Level('lvl0.png'))
        for entity in entities:
            self.entities.append(entity)
        self.entities.append(pacman)

        super().load()


scene = Lvl0()