import pygame
import random

pygame.init()

SCREEN_WIDTH = 600
SCREEN_HEIGHT = 400
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pygame.display.set_caption("Coin Collector")

clock = pygame.time.Clock()

WHITE = (255, 255, 255)
BLUE  = (50, 100, 200)
GOLD  = (220, 180, 0)

# Player: a rectangle with a position and size
player = pygame.Rect(100, 100, 30, 30)
player_speed = 4

# Coin: a fixed position on screen
coin_x = random.randint(20, SCREEN_WIDTH - 20)
coin_y = random.randint(20, SCREEN_HEIGHT - 20)
coin_radius = 10

score = 0

running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    # TODO: read keyboard input and move the player
    # Hint: use pygame.key.get_pressed()
    # keys = pygame.key.get_pressed()
    # if keys[pygame.K_LEFT]:  player.x -= player_speed
    # ... add UP, DOWN, RIGHT

    # TODO: keep the player inside the screen boundaries
    # Hint: clamp player.x between 0 and SCREEN_WIDTH - player.width

    # TODO: check whether the player has reached the coin
    # Hint: use player.collidepoint(coin_x, coin_y)
    # If they collide: add 1 to score, pick a new random coin position

    screen.fill(WHITE)

    # Draw the coin
    pygame.draw.circle(screen, GOLD, (coin_x, coin_y), coin_radius)

    # Draw the player
    pygame.draw.rect(screen, BLUE, player)

    # TODO: draw the score text on screen
    # Hint: create a font with pygame.font.SysFont("arial", 24)
    # then use font.render() and screen.blit()

    pygame.display.flip()
    clock.tick(60)

pygame.quit()