import pygame
import time
import sys
import random

WIDTH, HEIGHT = 600, 700
WHITE = (255, 255, 255)
BLUE = (0,100,200)
PINK = (255, 0, 120)
BAR = 60

### SETTINGS  ###
MIN_ENEMY_SPEED = 4
MAX_ENEMY_SPEED = 6
PLAYER_SPEED = 3
MIN_BALL_WIDTH = 20
MAX_BALL_WIDTH = 30
ENEMY_COLOR = WHITE
PLAYER_COLOR = PINK
DIFFICULTY_LEVEL = 15
MAX_LIFE = 10
PLAYER_SIZE = 30
MAX_PLAYER_UP_POS = 200
### SETTINGS  ###

enemies = []
pygame.init()
canvas = pygame.display.set_mode((WIDTH,HEIGHT))
background  = pygame.Surface((WIDTH,HEIGHT))
font = pygame.font.SysFont("Calibri", 30)
pygame.display.set_caption('Dodger')
clock = pygame.time.Clock()

def drawBorder(y):
    pygame.draw.line(canvas, WHITE, (0, y), (WIDTH, y), 2)

def quitGame():
    pygame.quit()
    sys.exit(0)

def drawScore():
    global life
    global score

    life_text = font.render("{} / {} ".format(life, MAX_LIFE), 1, WHITE)
    rect_life = life_text.get_rect()
    rect_life.x = BAR/2
    rect_life.centery = HEIGHT - BAR/2
    canvas.blit(life_text, (rect_life.x, rect_life.y))

    score_text = font.render("{}".format(score), 1, WHITE)
    rect_score = score_text.get_rect()
    rect_score.right = WIDTH - BAR/2
    rect_score.centery = HEIGHT - BAR/2
    canvas.blit(score_text, (rect_score.x, rect_score.y))

class Enemy():
    def __init__(self):
        self.randomize()

    def randomize(self):
        self.x = random.randint(0, WIDTH - 50)
        self.y = random.randint(-700, -10)
        self.w = random.randint(MIN_BALL_WIDTH, MAX_BALL_WIDTH)
        self.speed = random.randint(MIN_ENEMY_SPEED, MAX_ENEMY_SPEED)

    def update(self, player):
        global life
        self.rec = pygame.Rect(self.x, self.y, self.w, self.w)
        self.y += self.speed

        if self.rec.bottom > HEIGHT - BAR:
            self.randomize()
            self.rec = pygame.Rect(self.x, self.y, self.w, self.w)

        if self.rec.colliderect(player.rec):
            life -=1

    def show(self):
        pygame.draw.rect(canvas, ENEMY_COLOR, self.rec, 0)

class Player():
    def __init__(self):
        self.rec = pygame.Rect(0, HEIGHT - (BAR + PLAYER_SIZE), PLAYER_SIZE, PLAYER_SIZE)
        self.rec.centerx = WIDTH/2
        self.speed = PLAYER_SPEED
        self.horizontalDir = 0
        self.verticalDir = 0

    def update(self):
        self.rec.x += self.speed * self.horizontalDir
        self.rec.y += self.speed * self.verticalDir

        if self.rec.left <= 0:
            self.rec.left = 0
        elif self.rec.right >= WIDTH:
            self.rec.right = WIDTH

        if self.rec.top <= HEIGHT - MAX_PLAYER_UP_POS:
            self.rec.top = HEIGHT - MAX_PLAYER_UP_POS
        elif self.rec.bottom >= HEIGHT - BAR:
            self.rec.bottom = HEIGHT - BAR

    def show(self):
        pygame.draw.rect(canvas, PLAYER_COLOR, self.rec, 0)

for i in range(DIFFICULTY_LEVEL):
     enemies.append(Enemy())

player = Player()
life = MAX_LIFE
score = 0
start = time.time()

def theGame():
    global life
    global score
    global start

    player.horizontalDir = 0
    player.verticalDir = 0
    keys = pygame.key.get_pressed()
    if keys[pygame.K_LEFT]:
        player.horizontalDir = -1
    elif keys[pygame.K_RIGHT]:
        player.horizontalDir = 1
    if keys[pygame.K_UP]:
        player.verticalDir = -1
    elif keys[pygame.K_DOWN]:
        player.verticalDir = 1

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            quitGame()

    canvas.blit(background, (0,0))
    drawBorder(HEIGHT - BAR)

    current = time.time()
    score = int(current - start)
    drawScore()

    for enemy in enemies:
        enemy.update(player)
        enemy.show()

    player.update()
    player.show()

    while life <= 0:
        canvas.fill((0,0,0,))

        line1 = 'The End'
        line2 = 'Your score: ' + str(score)
        line3 = 'press P to play again'
        line4 = 'press Q to quit'

        textSet1 = font.render(line1, True, (PINK))
        textSet2 = font.render(line2, True, (PINK))
        textSet3 = font.render(line3, True, (PINK))
        textSet4 = font.render(line4, True, (PINK))

        canvas.blit(textSet1,(20,20))
        canvas.blit(textSet2,(20,80))
        canvas.blit(textSet3,(20,140))
        canvas.blit(textSet4,(20,200))
        pygame.display.flip()

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                quitGame()
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_p:
                    life = MAX_LIFE
                    score = 0
                    start = time.time()
                    player.rec.centerx = WIDTH/2
                    player.rec.bottom = HEIGHT - BAR
                    return
                elif event.key == pygame.K_q:
                    quitGame()

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

while True:
    theGame()