"""
-------------------------------------
    Project: Platformer Style Game
   Standard: Te Punga Assessment 2 - 20%
     School: Tauranga Boys' College
     Author: Zack Norwood
       Date: July 2024
     Pygame: 2.6.0
     Python: 3.11.9
-------------------------------------
"""
#importing neccisary modules
import pygame
from pygame.locals import *
from pygame import mixer
import pickle
from os import path


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


#Setting fixed variable values
clock = pygame.time.Clock()
fps = 60

screen_width = 1000
screen_height = 1000

screen = pygame.display.set_mode((screen_width, screen_height))
pygame.display.set_caption('Platformer')


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

tile_size = 50
game_over = 0
main_menu = True
level = 4
max_levels = 8
score = 0


white = (255, 255, 255)
blue = (0, 0, 255)

#load images

sky_img = pygame.image.load('sky.png')


restart_img = pygame.image.load('restart_btn.png')
start_img = pygame.image.load('start_btn.png')
exit_img = pygame.image.load('exit_btn.png')

pygame.mixer.music.load('music.mp3')
pygame.mixer.music.play(-1, 0.0, 5000)
coin_fx = pygame.mixer.Sound('coin.wav')
coin_fx.set_volume(99)
jump_fx = pygame.mixer.Sound('jump.wav')
jump_fx.set_volume(0.5)
game_over_fx = pygame.mixer.Sound('game_over.mp3')
game_over_fx.set_volume(0.5)

#Function for drawing text
def draw_text(text, font, text_col, x, y):
    img = font.render(text, True, text_col)
    screen.blit(img, (x, y))


#Function for resetting after death or completion
def reset_level(level):
    player.reset(100, screen_height - 130)
    slime_group.empty()
    platform_group.empty()
    coin_group.empty()
    lava_group.empty()
    exit_group.empty()
    #Searching for the world data in directory
    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)
    #Creating a dummy coin for the score
    score_coin = Coin(tile_size // 2, tile_size // 2)
    coin_group.add(score_coin)
    return world
#Defining the button class
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
    #function for drawing buttons
    def draw(self):
        action = False 
        #getting mouse position
        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


#Defining the class for the player
class Player():
    def __init__(self, x, y):
        self.reset(x, y)

        
    #Defining the function for all player movements and changes
    def update(self, game_over):
        dx = 0
        dy = 0
        walk_cooldown = 10
        col_thresh = 20
        
        #Code for when the spacebar is pressed to make the character jump
        if game_over == 0:
            key = pygame.key.get_pressed()
            #Code to check if the player is in the air before jumping
            if key[pygame.K_SPACE] and self.jumped == False and self.in_air == False:
                jump_fx.play()
                self.vel_y = -15
                self.jumped = True
            if key[pygame.K_SPACE] == False:
                self.jumped = False
            #Code for basic left and right movements
            if key[pygame.K_LEFT]:
                dx -= 5
                self.counter += 1
                self.direction = -1
            if key[pygame.K_RIGHT]:
                dx += 5
                self.counter += 1
                self.direction = 1
            if key[pygame.K_LEFT] == False and key[pygame.K_RIGHT] == False:
                self.counter =0
                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]
                    
            #Handle animation
            if self.counter > walk_cooldown:
                self.counter = 0  
                self.index += 1
                if self.index >= len(self.images_right):
                    self.index = 0
                self.image = self.images_right[self.index]
                if self.direction == 1:
                    self.image = self.images_right[self.index]
                if self.direction == -1:
                    self.image = self.images_left[self.index]

            #Add gravity
            self.vel_y += 1 
            if self.vel_y > 10 :
                self.vel_y = 10 
            dy += self.vel_y

            #Check for colision with floor
            self.in_air = True
            for tile in world.tile_list:
                #Check for colision in x direction
                if tile[1].colliderect(self.rect.x + dx, self.rect.y, self.width, self.height):
                    dx = 0
                
                #Check for colision in y direction
                if tile[1].colliderect(self.rect.x, self.rect.y + dy, self.width, self.height):
                    #Check if below the ground (Jumping)
                    if self.vel_y < 0:
                        dy = tile[1].bottom - self.rect.top
                        self.vel_y = 0
                    #Check if above the ground (Falling)
                    elif self.vel_y >= 0:
                        dy = tile[1].top - self.rect.bottom
                        self.vel_y = 0
                        self.in_air = False
            
            #Check for collision with enemies
            if pygame.sprite.spritecollide(self, slime_group, False):
                game_over = -1
                game_over_fx.play()

            #Check for collision with Lava
            if pygame.sprite.spritecollide(self, lava_group, False):
                game_over = -1
                game_over_fx.play()
            
            ##Check for collision with 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 
                    

            #update player coordinates
            self.rect.x += dx
            self.rect.y += dy

        elif game_over == -1:
            self.image = self.dead_image
            draw_text('GAME OVER!', font, blue, (screen_width // 2) - 2000, screen_height // 2)
            if self.rect.y > 200:
                self.rect.y -= 5

            if self.rect.bottom > screen_height:
                self.rect.bottom = screen_height
                dy = 0
        #draw player onto screen
        screen.blit(self.image, self.rect)
        

        return game_over

    #function for resetting the game
    def reset(self, x, y):
        self.images_right = []
        self.images_left = []
        self.index = 0 
        self.counter = 0
        for num in range(1, 5):
            img_right = pygame.image.load(f'steve{num}.png')
            img_right = pygame.transform.scale(img_right, (40,80))
            self.images_right.append(img_right)
            img_left = pygame.transform.flip(img_right, True, False)
            self.images_left.append(img_left)
        self.dead_image = pygame.image.load('ghost.png')
        self.dead_image = pygame.transform.scale(self.dead_image, (40,80))
        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 = []

        #load images
        dirt_img = pygame.image.load('dirt.png')
        grass_img = pygame.image.load('grass1.png')

        #Define what tile numbers correlate to what thing (Platform, enemy, exit ect)
        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:
                    slime = Enemy(col_count * tile_size, row_count * tile_size + 10)
                    slime_group.add(slime)
                if tile == 4:
                    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:
                    lava = Lava(col_count * tile_size-1, row_count * tile_size + (tile_size // 2))
                    lava_group.add(lava)
                if tile == 7:
                    coin = Coin(col_count * tile_size + (tile_size // 2), row_count * tile_size + (tile_size // 2))
                    coin_group.add(coin)
                if tile == 8:
                    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])

            
#Define the enemy class
class Enemy(pygame.sprite.Sprite):
    def __init__(self, x, y):
        pygame.sprite.Sprite.__init__(self)
        self.image= pygame.image.load('slime.png')
        self.image = pygame.transform.scale( self.image, (tile_size - 10, tile_size - 10))
        self.rect = self.image.get_rect()
        self.rect. x = x
        self.rect.y = y
        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

#Define the platform class
class Platform(pygame.sprite.Sprite):
    def __init__(self, x, y, move_x, move_y):
        pygame.sprite.Sprite.__init__(self)
        img = pygame.image.load('platform.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

#Define the lava class
class Lava(pygame.sprite.Sprite):
    def __init__(self, x, y):
        pygame.sprite.Sprite.__init__(self)
        img = pygame.image.load('lava.png')
        self.image = pygame.transform.scale(img, (tile_size +2, tile_size // 1.5))
        self.rect = self.image.get_rect()
        self.rect. x = x
        self.rect.y = y

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

#Define the exit class
class Exit(pygame.sprite.Sprite):
    def __init__(self, x, y):
        pygame.sprite.Sprite.__init__(self)
        img = pygame.image.load('exit.png')
        self.image = pygame.transform.scale(img, (tile_size, int(tile_size * 1.7)))
        self.rect = self.image.get_rect()
        self.rect. x = x
        self.rect.y = y


player = Player(100, screen_height - 130)

slime_group = pygame.sprite.Group()
platform_group = pygame.sprite.Group()
lava_group = pygame.sprite.Group()
coin_group = pygame.sprite.Group()
exit_group = pygame.sprite.Group()

#Create dummy coin to show 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 - 50, screen_height // 2 + 100, restart_img)
start_button = Button(screen_width // 2 - 350, screen_height // 2, start_img)
exit_button = Button(screen_width // 2 + 150, screen_height // 2, exit_img)

#Run the game 
run = True
while run: 

    clock.tick(fps)
    
    screen.blit(sky_img, (0, 0))


    if main_menu == True:
        if exit_button.draw() == True:
            run = False
        if start_button.draw():
            main_menu = False
    else:
        world.draw()

        if game_over == 0:
            slime_group.update()
            #update score
			#check if a coin has been collected
            if pygame.sprite.spritecollide(player, coin_group, True):
                score += 1
                coin_fx.play()
            draw_text('X ' + str(score), font_score, white, tile_size - 10, 10)
            
        slime_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 the player has died
        if game_over == -1:
            if restart_button.draw():
                world_data = []
                world = reset_level(level)
                game_over = 0
                score = 0 

        #if player has completed the 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, blue, (screen_width // 2) - 140, screen_height // 2)
                if restart_button.draw():
                    level = 1 
                    #Reset level
                    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