import pygame

SCREEN_WIDTH = 1280
SCREEN_HEIGHT = 720


class Game:
    def __init__(self):
        pygame.init()
        
        pygame.display.set_caption("School Game")

        self.clock = pygame.Clock()
        self.screen: pygame.Surface = pygame.display.set_mode(
            (SCREEN_WIDTH, SCREEN_HEIGHT)
        )

        self.display: pygame.Surface = pygame.Surface(
            (self.screen.get_width() // 2, self.screen.get_height() // 2)
        )

        self.movement: list[bool] = [False, False, False, False]

        self.running: bool = True

        self.dt: int = 0

        self.player_pos = pygame.Vector2(self.display.get_width() / 2, self.display.get_height() / 2)

        self.item_rect = pygame.Rect(60, 40, 10, 10)

        self.flashlight_rect = (self.player_pos, 50)

        self.flashlight = 0

        self.color_item = (0, 0, 0)

        self.speed = 300

        self.player_width = 20
        self.player_height = 20

        self.walls = [
            pygame.Rect(100, 100, 20, 50),
            pygame.Rect(300, 300, 200, 20),
            pygame.Rect(550, 80, 20, 200)
        ]
        self.light_radius = 75

        # self.circle = pygame.geometry.Circle(self.player_pos[0], self.player_pos[1], 30)

    def run(self) -> None:
        while self.running:
            # Background
            self.display.fill((0, 0, 0, 0))

            self.player_rect = pygame.Rect(self.player_pos[0]-10, self.player_pos[1]-10, self.player_width, self.player_height)


            # Event-Keys
            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    self.running = False

                if event.type == pygame.KEYDOWN:
                    if event.key == pygame.K_ESCAPE:
                        self.running = False

                    if event.key == pygame.K_LSHIFT:
                        self.speed = 600

                if event.type == pygame.KEYUP:
                    if event.key == pygame.K_LSHIFT:
                        self.speed = 300

            # Player-Draw
            # self.flashlight = pygame.draw.circle(self.display, (255, 255, 255, 0), self.flashlight_rect[0], self.flashlight_rect[1])





            """RAYCASTING"""
            ray_end = pygame.Vector2()
            light_points = []
            vector = pygame.Vector2(self.light_radius, 0)

            # Lichtstrahlen berechnen
            for i in range(360):

                rotated_vector = vector.rotate(i)
                ray_end = self.player_pos + rotated_vector


                # Überschneidung mit den Wänden prüfen
                for wall in self.walls:
                    überschneidung = wall.clipline(self.player_pos, ray_end)

                    if überschneidung:
                        schnittpunkt = pygame.Vector2(überschneidung[0])

                        ray_end = schnittpunkt


                light_points.append(ray_end)




            pygame.draw.polygon(
                self.display,
                (243, 255, 74),
                light_points
            )

            pygame.draw.rect(self.display, self.color_item, self.item_rect)

            pygame.draw.rect(self.display, (255, 0, 0), self.player_rect)



            for wall in self.walls:
                pygame.draw.rect(self.display, "grey", wall)
            

            velocity = self.speed * self.dt


            # Smooth Movement
            keys = pygame.key.get_pressed()
            
            direction = pygame.Vector2(
                keys[pygame.K_d] - keys[pygame.K_a],
                keys[pygame.K_s] - keys[pygame.K_w]
            )

            movement = direction * self.speed * self.dt

            self.player_pos += movement

            # player_rect.center = round(player_pos)
            self.player_rect.centerx = round(self.player_pos.x)
            
            for wall in self.walls:
                if self.player_rect.colliderect(wall):
                    if movement.x > 0:
                        self.player_rect.right = wall.left

                    elif movement.x < 0:
                        self.player_rect.left = wall.right

                    self.player_pos.x = self.player_rect.centerx

            self.player_rect.centery = round(self.player_pos.y)

            for wall in self.walls:
                if self.player_rect.colliderect(wall):
                    if movement.y > 0:
                        self.player_rect.bottom = wall.top

                    elif movement.y < 0:
                        self.player_rect.top = wall.bottom

                    self.player_pos.y = self.player_rect.centery


            self.player_pos[1] = max(self.player_pos[1], self.player_height/2)
            
            self.player_pos[1] = min(self.player_pos[1], SCREEN_HEIGHT/2-self.player_height/2)

            self.player_pos[0] = max(self.player_pos[0], self.player_width/2)
            
            self.player_pos[0] = min(self.player_pos[0], SCREEN_WIDTH/2-self.player_width/2)

            # print(f"Player Pos: {self.player_pos}, Player Pos Before: {player_pos_before}")

            if self.rect_circle_collision(self.item_rect, self.flashlight_rect):
                self.color_item = (0, 0, 255)
            else:
                self.color_item = (0, 0, 0)
            
            self.screen.blit(
                pygame.transform.scale(self.display, self.screen.get_size())
            )

            pygame.display.update()
            self.dt = self.clock.tick(60) / 3000

    def rect_circle_collision(self, rect, circle):
        rect_x, rect_y, rect_w, rect_h = rect

        circle_x = circle[0][0]
        circle_y = circle[0][1]
        circle_r = circle[1]


        # Calculate the closest point on the rectangle to the center of the circle
        closest_x = max(rect_x, min(circle_x, rect_x + rect_w))
        closest_y = max(rect_y, min(circle_y, rect_y + rect_h))

        # Calculate the distance between the center of the circle and the closest point on the rectangle
        dx = circle_x - closest_x
        dy = circle_y - closest_y
        distance = (dx ** 2 + dy ** 2) ** 0.5

        return distance <= circle_r


game = Game()
game.run()