import pygame 

pygame.init()

clock = pygame.time.Clock()
FPS = 60
#game window 
SCREEN_WIDTH = 800
SCREEN_HEIGHT = 640
LOWER_MARGIN = 100
SIDE_MARGIN = 300

screen = pygame.display.set_mode((SCREEN_WIDTH + SCREEN_HEIGHT, SCREEN_HEIGHT + LOWER_MARGIN))
pygame.display.set_caption('Level Editor')


#define game veribals

ROWS = 16
MAX_COLS = 150
TILE_SIZE = SCREEN_HEIGHT // ROWS
TILE_TYPES = 21
scroll_left = False
scroll_right = False 
scroll = 0
scroll_speed = 1

#Load images
pine1_img = pygame.image.load('img/pine1.png').convert_alpha()
pine2_img = pygame.image.load('img/pine2.png').convert_alpha()
mountion_img = pygame.image.load('img/mountain.png').convert_alpha()
sky_img = pygame.image.load('img/sky_cloud.png').convert_alpha()
#store tiles in a list 

img_list = []
for x in range(TILE_TYPES):
    img = pygame.image.load(f'img/tile/{x}')

#define the clours 
GREEN = (144, 201, 120)
WHITE = (255, 255, 255)
RED = (200, 25, 25)



#draw function for drawing the background
def draw_bg():
    screen.fill(GREEN)
    Width = sky_img.get_width()
    for x in range(4):
        screen.blit(sky_img, ((x * Width) - scroll * 0.5, 0))
        screen.blit(mountion_img, ((x * Width) - scroll * 0.6, SCREEN_HEIGHT - mountion_img.get_height() - 300))
        screen.blit(pine1_img, ((x * Width) - scroll * 0.7, SCREEN_HEIGHT - pine1_img.get_height() - 150))
        screen.blit(pine2_img, ((x * Width) - scroll * 0.8, SCREEN_HEIGHT - pine2_img.get_height()))

#draw grid
def draw_grid():
    #vertical lines
    for c in range(MAX_COLS + 1):
        pygame.draw.line(screen, WHITE, (c * TILE_SIZE - scroll, 0), (c * TILE_SIZE - scroll, SCREEN_HEIGHT))
    #horizontal lines
    for c in range(ROWS+ 1):
        pygame.draw.line(screen, WHITE, (0, c * TILE_SIZE), (SCREEN_WIDTH, c * TILE_SIZE))


run = True
while run:

    clock.tick(FPS)

    draw_bg()
    draw_grid()
#scroll the map
    if scroll_left == True and scroll > 0:
        scroll-= 5 * scroll_speed
    if scroll_right == True:
        scroll += 5 * scroll_speed

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False
        #keybord press
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                scroll_left = True
            if event.key == pygame.K_RIGHT:
                scroll_right = True
            if event.key == pygame.K_RSHIFT:
                scroll_speed = 5


        if event.type == pygame.KEYUP:
            if event.key == pygame.K_LEFT:
                scroll_left = False
            if event.key == pygame.K_RIGHT:
                scroll_right = False
            if event.key == pygame.K_RSHIFT:
                scroll_speed = 1


    pygame.display.update()

pygame.quit()