import turtle
import random

# Set up screen
win = turtle.Screen()
win.title("Flappy Bird in Python (CodeHS)")
win.bgcolor("skyblue")
win.setup(width=500, height=600)

# Bird setup
bird = turtle.Turtle()
bird.shape("circle")
bird.color("yellow")
bird.penup()
bird.goto(-100, 0)
bird.dy = 0  # Bird's vertical speed

# Pipe lists
pipes = []

# Gravity
gravity = -0.3

def create_pipe():
    """Creates a new pipe pair at the right edge of the screen."""
    pipe_top = turtle.Turtle()
    pipe_top.shape("square")
    pipe_top.color("green")
    pipe_top.penup()
    pipe_top.shapesize(stretch_wid=10, stretch_len=2)
    pipe_top.goto(200, random.randint(50, 200))

    pipe_bottom = turtle.Turtle()
    pipe_bottom.shape("square")
    pipe_bottom.color("green")
    pipe_bottom.penup()
    pipe_bottom.shapesize(stretch_wid=10, stretch_len=2)
    pipe_bottom.goto(200, pipe_top.ycor() - 150)  # Space between pipes

    pipes.append((pipe_top, pipe_bottom))

def move_pipes():
    """Moves pipes to the left and removes off-screen pipes."""
    for pipe_top, pipe_bottom in pipes:
        pipe_top.setx(pipe_top.xcor() - 3)
        pipe_bottom.setx(pipe_bottom.xcor() - 3)

    # Remove pipes that move off-screen
    for pipe_top, pipe_bottom in pipes[:]:
        if pipe_top.xcor() < -250:
            pipe_top.hideturtle()
            pipe_bottom.hideturtle()
            pipes.remove((pipe_top, pipe_bottom))

def check_collision():
    """Checks if the bird collides with pipes or the ground."""
    for pipe_top, pipe_bottom in pipes:
        if (bird.xcor() + 10 > pipe_top.xcor() - 20 and
            bird.xcor() - 10 < pipe_top.xcor() + 20):
            if (bird.ycor() + 10 > pipe_top.ycor() - 50 or
                bird.ycor() - 10 < pipe_bottom.ycor() + 50):
                return True  # Collision detected

    # Check if bird hits ground or top of the screen
    if bird.ycor() < -280 or bird.ycor() > 280:
        return True

    return False

def flap():
    """Makes the bird jump."""
    bird.dy = 5  # Move bird up

def game_loop():
    """Main game loop running at ~50 FPS."""
    global gravity

    # Apply gravity
    bird.dy += gravity
    bird.sety(bird.ycor() + bird.dy)

    # Move pipes
    move_pipes()

    # Create new pipes occasionally
    if random.randint(1, 100) < 2:
        create_pipe()

    # Check for collisions
    if check_collision():
        bird.goto(-100, 0)  # Reset bird position
        bird.dy = 0
        for pipe_top, pipe_bottom in pipes:
            pipe_top.hideturtle()
            pipe_bottom.hideturtle()
        pipes.clear()  # Fixed this line

    # Update the screen
    win.update()  # Refresh the screen manually

# Bind spacebar to flap function
win.listen()
win.onkeypress(flap, "space")

# Set up screen update delay
win.tracer(0)  # Disable automatic screen update

# Start the game loop
while True:
    game_loop()  # Continuously run the game loop

    # Simulate FPS with a small delay (adjustable to make game faster/slower)
    win.update()  # Make sure the screen updates after each loop

    # Sleep for a small time interval (approx 20ms to make FPS about 50)
    turtle.delay(20)  # Simulate the 50 FPS (adjustable)