import math

import pygame

# pygame setup
pygame.init()
screen = pygame.display.set_mode((1280, 720))
clock = pygame.time.Clock()
running = True
dt = 0

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

walls = [
    pygame.Rect(980, 100, 50, 440),
    pygame.Rect(280, 650, 720, 35),
]




while running:
    # poll for events
    # pygame.QUIT event means the user clicked X to close your window
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

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

            if event.key == pygame.K_ESCAPE:
                running = False

    # fill the screen with a color to wipe away anything from last frame
    screen.fill("black")

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

    end_pos = pygame.Vector2(player_pos[0] + 300, player_pos[1])

    # pygame.draw.line(screen, "cyan", (640, 360), vector2)

    """---------------------------------------  WICHTIG: Vector2.rotate() ---------------------------------------"""


    ray_end = pygame.Vector2()
    light_points = []
    vector = pygame.Vector2(300, 0)

    # Lichtstrahlen berechnen
    for i in range(360):

        rotated = vector.rotate(i)
        ray_end = player_pos + rotated

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

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

                ray_end = schnittpunkt


        light_points.append(ray_end)




    pygame.draw.polygon(
        screen,
        "yellow",
        light_points
    )



    pygame.draw.circle(screen, "red", player_pos, 40)

    keys = pygame.key.get_pressed()
    if keys[pygame.K_w]:
        player_pos.y -= 300 * dt
    if keys[pygame.K_s]:
        player_pos.y += 300 * dt
    if keys[pygame.K_a]:
        player_pos.x -= 300 * dt
    if keys[pygame.K_d]:
        player_pos.x += 300 * dt

    # flip() the display to put your work on screen
    pygame.display.flip()

    # limits FPS to 60
    # dt is delta time in seconds since last frame, used for framerate-
    # independent physics.
    dt = clock.tick(60) / 1000


pygame.quit()