import pygame, random
from os import path

img_dir = path.join(path.dirname(__file__), 'img')

Width = 480
Height = 600
FPS = 60
Powerup_time = 5000

White = (255, 255, 255)
Black = (0, 0, 0)
Red = (255, 0, 0)
Green = (0, 255, 0)
Blue = (0, 0, 255)
Yellow = (255, 255, 0)
pygame.init()
pygame.mixer.init()
screen = pygame.display.set_mode((Width, Height))
pygame.display.set_caption("Defender")
clock = pygame.time.Clock()
font_name = pygame.font.match_font('arial')


def draw_text(surf, text, size, x, y):
    font = pygame.font.Font(font_name, size)
    text_surface = font.render(text, True, White)
    text_rect = text_surface.get_rect()
    text_rect.midtop = (x, y)
    surf.blit(text_surface, text_rect)

def newmob():
    m = Mob()
    all_sprites.add(m)
    mobs.add(m)

def draw_shield_bar(surf, x, y, pct):
    if pct < 0:
        pct = 0
    Bar_Length = 100
    Bar_Height = 10
    fill = (pct  / 100) * Bar_Length
    outline_rect = pygame.Rect(x, y, Bar_Length, Bar_Height)
    fill_rect = pygame.Rect(x, y, fill, Bar_Height)
    pygame.draw.rect(surf, Yellow, fill_rect, Bar_Height)
    pygame.draw.rect(surf, White, outline_rect, 2)

def draw_lives(surf, x, y, lives, img):
    for i in range(lives):
        img_rect = img.get_rect()
        img_rect.x = x + 30 * i
        img_rect.y = y
        surf.blit(img, img_rect)

def draw_roundtime(surf, x, y):
    Time_Length = 30
    Time_Height = 10
    pygame.draw.rect(surf, Time_Length, Time_Height)


class Player(pygame.sprite.Sprite):
    def __init__(self):
        pygame.sprite.Sprite.__init__(self)
        self.image = pygame.transform.scale(player_img, (60, 40))
        self.image.set_colorkey(White)
        self.rect = self.image.get_rect()
        self.radius = 14
        self.rect.centerx = Width / 2
        self.rect.bottom = Height - 10
        self.speedx = 0
        self.shield = 100
        self.shoot_delay = 250
        self.last_shot = pygame.time.get_ticks()
        self.lives = 3
        self.hidden = False
        self.hide_timer = pygame.time.get_ticks()
        self.power = 1
        self.power_time = pygame.time.get_ticks()


    def update(self):
        if self.power >= 2 and pygame.time.get_ticks() - self.power_time > Powerup_time:
            self.power -= 1
            self.power_time = pygame.time.get_ticks()

        if self.hidden and pygame.time.get_ticks() - self.hide_timer > 1000:
            self.hidden = False
            self.rect.centerx = (Width / 2)
            self.rect.bottom = Height - 10
        self.speedx = 0
        keystate = pygame.key.get_pressed()
        if keystate[pygame.K_a]:
            self.speedx = -5
        if keystate[pygame.K_d]:
            self.speedx = 5
        if keystate[pygame.K_SPACE]:
            self.shoot()
        self.rect.x += self.speedx
        if self.rect.right > Width:
            self.rect.right = Width
        if self.rect.left < 0:
            self.rect.left = 0

    def powerup(self):
        self.power += 1
        self.power_time = pygame.time.get_ticks()

    def shoot(self):
        now = pygame.time.get_ticks()
        if now - self.last_shot > self.shoot_delay:
            self.last_shot = now
            if self.power == 1:
                bullet = Bullet(self.rect.centerx, self.rect.top)
                all_sprites.add(bullet)
                bullets.add(bullet)
            if self.power >= 2:
                bullet1 = Bullet(self.rect.left, self.rect.centery)
                bullet2 = Bullet(self.rect.right, self.rect.centery)
                all_sprites.add(bullet1)
                all_sprites.add(bullet2)
                bullets.add(bullet1)
                bullets.add(bullet2)

    def hide(self):
        self.hidden = True
        self.hide_timer = pygame.time.get_ticks()
        self.rect.center = (Width / 2, Height + 200)

class Mob(pygame.sprite.Sprite):
    def __init__(self):
        pygame.sprite.Sprite.__init__(self)
        self.image = pygame.transform.scale(enemy_img, (40, 30))
        self.image.set_colorkey(Black)
        self.rect = self.image.get_rect()
        self.radius = 7
        self.rect.x = random.randrange(Width - self.rect.width)
        self.rect.y = random.randrange(-100, -40)
        self.speedy = random.randrange(1, 4)
        self.speedx = random.randrange(-3, 3)

    def update(self):
        self.rect.y += self.speedy
        if self.rect.top > Height + 10 or self.rect.left < -25 or self.rect.right < 25:
            self.rect.x = random.randrange(Width - self.rect.width)
            self.rect.y = random.randrange(-100, -40)
            self.speedy = random.randrange(1, 4)

class Bullet(pygame.sprite.Sprite):
    def __init__(self, x, y):
        pygame.sprite.Sprite.__init__(self)
        self.image = bullet_img
        self.image.set_colorkey(Black)
        self.rect = self.image.get_rect()
        self.rect.bottom = y
        self.rect.centerx = x
        self.speedy = -10

    def update(self):
        self.rect.y += self.speedy
        if self.rect.bottom < 0:
            self.kill()

class Pow(pygame.sprite.Sprite):
    def __init__(self, center):
        pygame.sprite.Sprite.__init__(self)
        self.type = random.choice(['shield', 'gun'])
        self.image = powerup_images[self.type]
        self.image.set_colorkey(Black)
        self.rect = self.image.get_rect()
        self.rect.center = center
        self.speedy = 2

    def update(self):
        self.rect.y += self.speedy
        if self.rect.top > Height:
            self.kill()

class Boss(pygame.sprite.Sprite):
    def __init__(self):
        pygame.sprite.Sprite.__init__(self)
        self.image = pygame.transform.scale(boss_img, (150, 200))
        self.image.set_colorkey(Black)
        self.rect = self.image.get_rect()
        self.rect.center = ((Width / 2, -70))
        self.speedy = 1
        self.shoot_delay = 250
        self.last_shot = pygame.time.get_ticks()
        self.hp = 150
        self.dead = False

    def update(self):
        if self.hp <= 25:
            self.speedy = 3



def show_go_screen():
    screen.blit(background, background_rect)
    draw_text(screen, "Defender", 64, Width / 2, Height / 4)
    draw_text(screen, "A and D to move, Space to fire", 22, Width / 2, Height / 2)
    draw_text(screen, "Press any key to begin", 18, Width / 2, Height * 3 / 4)
    pygame.display.flip()
    waiting = True
    while waiting:
        clock.tick(FPS)
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
            if event.type == pygame.KEYUP:
                waiting = False

background = pygame.image.load(path.join(img_dir, "grass00.png")).convert()
background_rect = background.get_rect()
player_img = pygame.image.load(path.join(img_dir, 'Hero.png')).convert()
player_mini_img = pygame.transform.scale(player_img, (36, 28))
player_mini_img.set_colorkey(White)
enemy_img = pygame.image.load(path.join(img_dir, 'Zombie.png')).convert()
boss_img = pygame.image.load(path.join(img_dir, 'Daddy Big Boi.png')).convert()
bullet_img = pygame.image.load(path.join(img_dir, 'bullet.png')).convert()
powerup_images = {}
powerup_images['shield'] = pygame.image.load(path.join(img_dir, 'Shield.png')).convert()
powerup_images['gun'] = pygame.image.load(path.join(img_dir, 'Gun.png')).convert()

game_over = True
running = True
while running:
    if game_over:
        show_go_screen()
        game_over = False
        all_sprites = pygame.sprite.Group()
        mobs = pygame.sprite.Group()
        bullets = pygame.sprite.Group()
        powerups = pygame.sprite.Group()
        player = Player()
        all_sprites.add(player)
        for i in range(6):
            newmob()
        score = 0

    clock.tick(FPS)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False


    all_sprites.update()

    hits = pygame.sprite.groupcollide(mobs, bullets, True, True)
    for hit in hits:
        score += 10
        if random.random() > 0.9:
            pow = Pow(hit.rect.center)
            all_sprites.add(pow)
            powerups.add(pow)
        newmob()

    hits = pygame.sprite.spritecollide(player, mobs, True, pygame.sprite.collide_circle)
    for hit in hits:
        player.shield -= 20
        newmob()
        if player.shield <= 0:
            player.hide()
            player.lives -= 1
            player.shield = 100

    hits = pygame.sprite.spritecollide(player, powerups, True)
    for hit in hits:
        if hit.type == 'shield':
            player.shield += random.randrange(10, 30)
            if player.shield >= 100:
                player.shield = 100
        if hit.type == 'gun':
            player.powerup()

    hits = pygame.sprite.spritecollide(player, Boss, True)
    for hit in hits:
        player.lives = 0

    hits = pygame.sprite.spritecollide(Boss, bullets, True)
    for hit in hits:
        boss.hp -= 10
        if boss.hp == 0:
            game_over = True

    if player.lives == 0:
        game_over = True


    screen.fill(Black)
    screen.blit(background, background_rect)
    all_sprites.draw(screen)
    draw_text(screen, str(score), 18, Width / 2, 10)
    draw_lives(screen, Width - 100, 5, player.lives, player_mini_img)
    draw_shield_bar(screen, 5, 5, player.shield)
    pygame.display.flip()

pygame.quit()