import pygame, sys, random, math

WIDTH, HEIGHT = 700, 980
FPS = 120
BG_COLOR = (10, 10, 12)

BALL_RADIUS = 10
BALL_COLOR = (255, 128, 0)
BALL_SPEED = 6.0

BUBBLE_R = 14
BLUE = (0, 0, 255)
PINK = (255, 0, 255)

WHITE = (255, 255, 255)
UI_BLUE = (20, 80, 165)

pygame.init()
pygame.display.set_caption("Bubble labyrinth ")
screen = pygame.display.set_mode((WIDTH, HEIGHT))
clock = pygame.time.Clock()
font_big = pygame.font.SysFont('Arial', 48, bold=True)
font_ui = pygame.font.SysFont('Arial', 24, bold=False)

def reflect_velocity(vx,vy,nx,ny):
    dot = vx * nx + vy * ny
    rx = vx - 2 * dot * nx
    ry = vy - 2 * dot * ny
    return rx, ry
def clamp(minv, v, maxv):
    return max(minv, min(v, maxv))
class Ball:
    def __init__(self, x, y):
        self.x = x
        self.y = y
        self.vx = 0
        self.vy = 0
    def launch(self):
        angle = random.uniform(-0.9, -2.3)
        self.vx = BALL_SPEED * math.cos(angle)
        self.vy = BALL_SPEED * math.sin(angle)
    def reset(self,x,y):
        self.x,self.y = float(x), float(y)
        self.vx, self.vy = 0.0
    def move(self):
        self.x += self.vx
        self.y += self.vy

        if self.x < BALL_RADIUS:
            self.x = BALL_RADIUS
            self.vx *= -1
        if self.x > WIDTH - BALL_RADIUS:
            self.x = WIDTH - BALL_RADIUS
            self.vx *= -1
        if self.y < BALL_RADIUS:
            self.y = BALL_RADIUS
            self.vy *= -1
        if self.y > HEIGHT - BALL_RADIUS:
            self.y = HEIGHT - BALL_RADIUS
            self.vy *= -1
    def draw(self, screen):
        pygame.draw.circle(screen, BALL_COLOR, (int(self.x), int(self.y)), BALL_RADIUS)