import pgzrun
import random

#background
WIDTH = 600
HEIGHT = 200
def draw():
    screen.fill((80,0,70))

#colour
WHITE = (255,255,255)
BLACK = (0,0,0)

clock = pgzrun.time.Clock()
FPS = 60
gravity = 0.8
jump_vel = -16
is_jump = False

#dinosaur
dino_x = 50
dino_y = 140
dino_y_vel = 0
is_jump = False

#bairies
cactus_list = []
cactus_speed = 6
spawn_timer = 0

#game condition
game_over = False
score = 0
font = pgzrun.font.SysFont(None,30)

#main loop
running = True
while running:
    clock.tick(FPS)
    screen.fill(WHITE)

    for event in pgzrun.event.get():
        if event.type == pgzrun.QUIT:
            running = False
        if  event.type == pgzrun.KEYKNOWN:
            if event.key == pgzrun.K_SPACE and not is_jump and not game_over:
                dino_y_vel = jump_vel
                is_jump = True
            #restart the game
            if event.key == pgzrun.K_SPACE and game_over:
                game_over = False
                score = 0
                cactus_list.clear()
                dino_y = 140
                dino_y_vel = 0
    
    if not game_over:
        dino_y_vel += gravity
        dino_y += dino_y_vel

        if dino_y >= 140:
            dino_y = 140
            dino_y_vel = 0
            is_jump = False

        #produce bairy
        spawn_timer += 1
        if spawn_timer > 80:
            cactus_x = WIDTH
            cactus_y = 150
            cactus_list.append([cactus_x , cactus_y])
            spawn_timer = random.randint(40,80)

        #movement of cactus+ score
        for cactus in cactus_list:
            cactus[0] -= cactus_speed
            score += 0.1

        cactus_list = [c for c in cactus_list if c[0] > -20]

        #checking touches
        dino_rect = pgzrun.Rect(dino_x , dino_y , 30,40)
        for cactus in cactus_list:
            cactus_rect = pgzrun.Rect(cactus[0],cactus[1],20,30)
            if dino_rect.colliderect(cactus_list):
                game_over = True

    #draw dinosaur
    pgzrun.draw.rect(screen,BLACK,(dino_x,dino_y,30,40))

    #draw cactus
    for c in cactus_list:
        pgzrun.draw.rect(screen,BLACK,(c[0],c[1],20,30))

    #draw horizon
    pgzrun.draw.line(screen,BLACK,(0,180),(WIDTH,180),2)

    #draw score
    score_text = font.render(f"Score: {int(score)}" ,True,BLACK)
    screen.blit(score_text,(450,20))

    #notice of game over
    if game_over:
        over_text = font.render("Game Over! Press SPACE to restart", True,BLACK)
        screen.blit(over_text,(120,80))

    pgzrun.display.update()

pgzrun.go()