import pygame
from pygame.locals import *
from pygame import mixer
import pickle
from os import path


pygame.mixer.pre_init(44100, -16, 2, 512)
mixer.init()
pygame.init()

#how fast things are traveling and how fast the code is running
clock = pygame.time.Clock()
fps = 60

#size of the screen
screen_width = 1000
screen_height = 1000

#the screen display 
screen = pygame.display.set_mode((screen_width, screen_height))
pygame.display.set_caption('Minecraft 2d Platformer')

#define font
font = pygame.font.SysFont('Bauhaus 93', 70)
font_score = pygame.font.SysFont('Bauhaus 93', 30)


#define game variables
tile_size = 50
game_over = 0
main_menu = True
level = 1
max_levels = 7
score = 0

#define colors
white = (255,255,255)


#load images
bg_img = pygame.image.load('img/background_nether.png')
restart_img = pygame.image.load('img/respawn_button.png')
start_img  = pygame.image.load('img/singleplayer_button.png')
exit_img  = pygame.image.load('img/exit_game.png')
minecraft_title = pygame.image.load('img/minecraft_title.png')

#load sounds
pygame.mixer.music.load('img/Rubedo.mp3')
pygame.mixer.music.play(-1, 0.0, 5000)
pygame.mixer.music.set_volume(1.0)
goldcollect_fx = pygame.mixer.Sound('img/goldcollect.wav')
goldcollect_fx.set_volume(5)
jump_fx = pygame.mixer.Sound('img/jump.wav')
jump_fx.set_volume(0.5)
damage_fx = pygame.mixer.Sound('img/damage.wav')
damage_fx.set_volume(0.5)

#identifying the font and text
def draw_text(text,font,text_col,x,y):
    img = font.render(text, True, text_col)
    screen.blit(img, (x, y))


#function to reset level
def reset_level(level):
    player.reset(100, screen_height - 130)
    magma_group.empty()
    platform_group.empty()
    lava_group.empty()
    exit_group.empty()
    
    #load in level data and create world
    if path.exists(f'level{level}_data'):
        with open(f'level{level}_data', 'rb') as f:
            world_data = pickle.load(f)
        world = World(world_data)

    return world



class Button():
    def __init__(self,x,y,image):
        self.image = image
        self.rect = self.image.get_rect()
        self.rect.x = x
        self.rect.y = y
        self.clicked = False
    
    def draw(self):
        action = False

        #get mouse pos
        pos = pygame.mouse.get_pos()

        #check mouseover and clicked conditions
        if self.rect.collidepoint(pos):
            if pygame.mouse.get_pressed()[0] == 1 and self.clicked == False:
                action = True
                self.clicked = True

        if pygame.mouse.get_pressed()[0] == 0:
            self.clicked = False

        #draw button
        screen.blit(self.image, self.rect)

        return action

class Player():
    def __init__(self,x,y):
        self.reset(x,y)


    
    def update(self, game_over):

        dx = 0
        dy = 0
        walk_cooldown = 7.5
        col_thresh = 20


        if game_over == 0:
            key = pygame.key.get_pressed()
            if key[pygame.K_SPACE] and self.jumped == False and self.in_air == False: # Jumping if in air
                jump_fx.play() #sound effect for jumping 
                self.vel_y = -15
                self.jumped = True
            if key[pygame.K_SPACE] == False: #jumping key
                self.jumped = False
            if key[pygame.K_LEFT]:#walk left key
                dx -= 5
                self.counter += 1
                self.direction = -1
            if key[pygame.K_RIGHT]:# walk right key
                dx += 5
                self.counter += 1
                self.direction = 1
            if key[pygame.K_LEFT] == False and key[pygame.K_RIGHT] == False: #standing still
                self.counter = 0
                self.index = 0
                if self.direction == 1: #direction of the images for the character
                    self.image = self.images_right[self.index]
                if self.direction == -1:
                    self.image = self.images_left[self.index]


            if self.counter > walk_cooldown:
                self.counter = 0
                self.index += 1
                if self.index >= len(self.images_right):
                    self.index = 0
                if self.direction == 1:
                    self.image = self.images_right[self.index]
                if self.direction == -1:
                    self.image = self.images_left[self.index]


            self.vel_y += 1
            if self.vel_y > 10:
                self.vel_y = 10  
            dy += self.vel_y



            #collision
            self.in_air = True
            for tile in world.tile_list:
                #check for collision in x direction
                if tile[1].colliderect(self.rect.x + dx, self.rect.y, self.width, self.height):
                    dx = 0
                #check for collision in y direction
                if tile[1].colliderect(self.rect.x, self.rect.y + dy, self.width, self.height):
                    #check if bellow the ground i.e jumping
                    if self.vel_y < 0:
                        dy = tile[1].bottom - self.rect.top
                        self.vel_y = 0
                    #check if above the ground i.e falling
                    elif self.vel_y >= 0:
                        dy = tile[1].top - self.rect.bottom
                        self.vel_y = 0
                        self.in_air = False
            
            #check collsion for enemies
            if pygame.sprite.spritecollide(self, magma_group, False):
                game_over = -1
                damage_fx.play()

            #check collsion for lava
            if pygame.sprite.spritecollide(self, lava_group, False):
                game_over = -1
                damage_fx.play()

            #check collsion for exit
            if pygame.sprite.spritecollide(self, exit_group, False):
                game_over = 1


            #check for collision with platforms
            for platform in platform_group:
                #collision in the x direction
                if platform.rect.colliderect(self.rect.x + dx, self.rect.y, self.width, self.height):
                    dx = 0
                #collision in the y direction
                if platform.rect.colliderect(self.rect.x, self.rect.y + dy, self.width, self.height):
                    #check if below platform
                    if abs((self.rect.top + dy) - platform.rect.bottom) < col_thresh:
                        self.vel_y = 0
                        dy = platform.rect.bottom - self.rect.top
                    #check if above platform
                    elif abs((self.rect.bottom + dy) - platform.rect.top) < col_thresh:
                        self.rect.bottom = platform.rect.top - 1
                        self.in_air = False
                        dy = 0
                    #move sideways with the platform
                    if platform.move_x != 0:
                        self.rect.x += platform.move_direction



            self.rect.x += dx
            self.rect.y += dy

        #"You died" screen
        elif game_over == -1:
            self.image = self.dead_image
            draw_text('You Died!', font, white, (screen_width // 2) - 125, screen_height // 2 )
            if self.rect.y > 200:
                self.rect.y -= 5


        screen.blit(self.image, self.rect)

        return game_over
    
    #player and ghost animations
    def reset(self,x,y):
        self.images_right = []
        self.images_left = []
        self.index = 0
        self.counter = 0
        for num in range(1, 3):
            img_right = pygame.image.load(f'img/steve{num}.png') # player images
            img_right = pygame.transform.scale(img_right, (40,90)) # player hitbox
            img_left = pygame.transform.flip(img_right, True, False) #if the player turns left, it will face left
            self.images_right.append(img_right)
            self.images_left.append(img_left)
        dead_image = pygame.image.load('img/smoke.png') # image for ghost/Ghast
        self.dead_image = pygame.transform.scale(dead_image, (64, 128))
        self.image = self.images_right[self.index]
        self.rect = self.image.get_rect()
        self.rect.x = x
        self.rect.y = y
        self.width = self.image.get_width()
        self.height = self.image.get_height()
        self.vel_y = 0
        self.jumped = False
        self.direction = 0
        self.in_air = True



class World():
    def __init__(self,data):
        self.tile_list = []

        dirt_img = pygame.image.load('img/netherack.png') #image for netherack/dirt
        grass_img = pygame.image.load('img/warped_grass.png') #image for warped grass/grass

        row_count = 0
        for row in data:
            col_count = 0
            for tile in row:
                if tile ==1:
                    img = pygame.transform.scale(dirt_img,(tile_size, tile_size))
                    img_rect = img.get_rect()
                    img_rect.x = col_count * tile_size
                    img_rect.y = row_count * tile_size
                    tile = (img, img_rect)
                    self.tile_list.append(tile)
                if tile ==2:
                    img = pygame.transform.scale(grass_img,(tile_size, tile_size))
                    img_rect = img.get_rect()
                    img_rect.x = col_count * tile_size
                    img_rect.y = row_count * tile_size
                    tile = (img, img_rect)
                    self.tile_list.append(tile)
                if tile == 3: # identifying the tile for the magma enemies
                    magma = Magma(col_count * tile_size, row_count * tile_size + 15)
                    magma_group.add(magma)
                if tile == 4: # identifying the tile for the slab platforms
                    platform = Platform(col_count * tile_size, row_count * tile_size, 1, 0)
                    platform_group.add(platform)
                if tile == 5:
                    platform = Platform(col_count * tile_size, row_count * tile_size, 0, 1)
                    platform_group.add(platform)
                if tile == 6: # identifying the tile for the lava
                    lava = Lava(col_count * tile_size, row_count * tile_size + (tile_size // 2))
                    lava_group.add(lava)
                if tile == 7: # identifying the tile for the coins/gold
                    coin = Coin(col_count * tile_size + (tile_size // 2), row_count * tile_size + (tile_size // 2))
                    coin_group.add(coin)
                if tile == 8: # identifying the tile for the exit/portal
                    exit = Exit(col_count * tile_size, row_count * tile_size - (tile_size // 2))
                    exit_group.add(exit)
                col_count += 1
            row_count += 1
                    
    def draw(self):
        for tile in self.tile_list:
            screen.blit(tile[0], tile[1])


#classes for every moving object and evey object colliding with the player
class Magma(pygame.sprite.Sprite): #magma class
    def __init__(self,x,y):
        pygame.sprite.Sprite.__init__(self)
        img = pygame.image.load('img/magma.png')
        self.image = pygame.transform.scale(img, (tile_size, tile_size))
        self.rect = self.image.get_rect()
        self.rect.x = x
        self.rect.y = y - 15
        self.move_direction = 1
        self.move_counter = 0

    def update(self):
        self.rect.x += self.move_direction
        self.move_counter += 1
        if abs(self.move_counter) > 50:
            self.move_direction *= -1
            self.move_counter *= -1


class Platform(pygame.sprite.Sprite): #platform class
    def __init__(self,x,y, move_x, move_y):
        pygame.sprite.Sprite.__init__(self)
        img = pygame.image.load('img/slab.png')
        self.image = pygame.transform.scale(img, (tile_size, tile_size // 2))
        self.rect = self.image.get_rect()
        self.rect.x = x
        self.rect.y = y
        self.move_counter = 0
        self.move_direction = 1
        self.move_x = move_x
        self.move_y = move_y

    def update(self):
        self.rect.x += self.move_direction * self.move_x
        self.rect.y += self.move_direction * self.move_y
        self.move_counter += 1
        if abs(self.move_counter) > 50:
            self.move_direction *= -1
            self.move_counter *= -1



class Lava(pygame.sprite.Sprite): #lava class
    def __init__(self,x,y):
        pygame.sprite.Sprite.__init__(self)
        img = pygame.image.load('img/lava.png')
        self.image = pygame.transform.scale(img, (tile_size, tile_size))
        self.rect = self.image.get_rect()
        self.rect.x = x
        self.rect.y = y

class Coin(pygame.sprite.Sprite): #gold/coin class
    def __init__(self,x,y):
        pygame.sprite.Sprite.__init__(self)
        img = pygame.image.load('img/gold.png')
        self.image = pygame.transform.scale(img, (tile_size // 2, tile_size // 2))
        self.rect = self.image.get_rect()
        self.rect.center = (x,y)


class Exit(pygame.sprite.Sprite): #exit/portal class
    def __init__(self,x,y):
        pygame.sprite.Sprite.__init__(self)
        img = pygame.image.load('img/portal.png')
        self.image = pygame.transform.scale(img, (tile_size, int(tile_size * 1.5)))
        self.rect = self.image.get_rect()
        self.rect.x = x
        self.rect.y = y

player = Player(100, screen_height - 130)

magma_group = pygame.sprite.Group() #identifiying the magma and putting it in the game
platform_group = pygame.sprite.Group() #identifiying the platform and putting it in the game
lava_group = pygame.sprite.Group() #identifiying the lava and putting it in the game
coin_group = pygame.sprite.Group() #identifiying the coin/gold and putting it in the game
exit_group = pygame.sprite.Group() #identifiying the exit/portal and putting it in the game

#create dummy coin for showing score
score_coin = Coin(tile_size // 2, tile_size // 2)
coin_group.add(score_coin)



#load in level data and create world
if path.exists(f'level{level}_data'):
    pickle_in = open(f'level{level}_data', 'rb')
    world_data = pickle.load(pickle_in)
world = World(world_data)

#create buttons
restart_button = Button(screen_width // 2 - 200, screen_height // 2 + 100, restart_img)
start_button = Button(screen_width // 2 - 400, screen_height // 2, start_img)
exit_button = Button(screen_width // 2 + 50, screen_height // 2, exit_img)


run = True
while run:

    clock.tick(fps)

    screen.blit(bg_img, (0,0))

    if main_menu == True:
        screen.blit(minecraft_title, (240, 150))
        if exit_button.draw():
            run = False
        if start_button.draw():
            main_menu = False
    else:
        world.draw()

        if game_over == 0:
            magma_group.update()
            platform_group.update()
            #update score
            #check if coin is collected
            if pygame.sprite.spritecollide(player, coin_group, True):
                score += 1
                goldcollect_fx.play()
            draw_text('X ' + str(score), font_score,white, tile_size - 10, 10)

        magma_group.draw(screen)
        platform_group.draw(screen)
        lava_group.draw(screen)
        coin_group.draw(screen)
        exit_group.draw(screen)

        game_over = player.update(game_over)

        #if player is dead
        if game_over == -1:
            if restart_button.draw():
                world_data = []
                world = reset_level(level)
                game_over = 0
                score = 0

        #if player has completed a level
        if game_over == 1:
            #reset game and go to next level
            level += 1
            if level <= max_levels:
                #reset level
                world_data = []
                world = reset_level(level)
                game_over = 0
            else:
                draw_text('YOU WIN!', font, white, (screen_width // 2) - 125, screen_height // 2)
                if restart_button.draw():
                    level = 1
                    world_data = []
                    world = reset_level(level)
                    game_over = 0
                    score = 0



    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False
    
    pygame.display.update()

pygame.quit()