import pygame
from pygame import mixer
import os
import csv
import Button

mixer.init()
pygame.init()


SCREEN_WIDTH = 800
SCREEN_HEIGHT = int(SCREEN_WIDTH * 0.8)

screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pygame.display.set_caption('Shooter')

#set framerate
clock = pygame.time.Clock()
FPS = 60

#define game variables
GRAVITY = 0.75
SCROLL_THRESH = 100
ROWS = 16
COLS = 150
TILE_SIZE = SCREEN_HEIGHT // ROWS
TILE_TYPES = 21
MAX_LEVELS = 3
screen_scroll = 0
bg_scroll = 0
level = 1
start_game = False
start_intro = False


#define player action variables
moving_left = False
moving_right = False
shoot = False
grenade = False
grenade_thrown = False


#load music and sounds
#pygame.mixer.music.load('audio/music2.mp3')
#pygame.mixer.music.set_volume(0.3)
#pygame.mixer.music.play(-1, 0.0, 5000)
jump_fx = pygame.mixer.Sound('Shooter-main/audio/jump.wav')
jump_fx.set_volume(0.05)


#load images
#Button images
start_img = pygame.image.load('Shooter-main/img/start_btn.png').convert_alpha()
exit_img = pygame.image.load('Shooter-main/img/exit_btn.png').convert_alpha()
restart_img = pygame.image.load('Shooter-main/img/restart_btn.png').convert_alpha()
#background
pine1_img = pygame.image.load('Shooter-main/img/Background/pine1.png').convert_alpha()
pine2_img = pygame.image.load('Shooter-main/img/Background/pine2.png').convert_alpha()
mountain_img = pygame.image.load('Shooter-main/img/Background/mountain.png').convert_alpha()
sky_img = pygame.image.load('Shooter-main/img/Background/sky_cloud.png').convert_alpha()
#store tiles in a list
img_list = []
for x in range(TILE_TYPES):
	img = pygame.image.load(f'Shooter-main/img/Tile/{x}.png')
	img = pygame.transform.scale(img, (TILE_SIZE, TILE_SIZE))
	img_list.append(img)



#define colours
BG = (144, 201, 120)
RED = (255, 0, 0)
WHITE = (255, 255, 255)
GREEN = (0, 255, 0)
BLACK = (0, 0, 0)
PINK = (235, 65, 54)

#define font
font = pygame.font.SysFont('Futura', 30)

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


def draw_bg():
	screen.fill(BG)
	width = sky_img.get_width()
	for x in range(5):
		screen.blit(sky_img, ((x * width) - bg_scroll * 0.5, 0))
		screen.blit(mountain_img, ((x * width) - bg_scroll * 0.6, SCREEN_HEIGHT - mountain_img.get_height() - 300))
		screen.blit(pine1_img, ((x * width) - bg_scroll * 0.7, SCREEN_HEIGHT - pine1_img.get_height() - 150))
		screen.blit(pine2_img, ((x * width) - bg_scroll * 0.8, SCREEN_HEIGHT - pine2_img.get_height()))


#function to reset level
def reset_level():
	decoration_group.empty()
	water_group.empty()
	exit_group.empty()

	#create empty tile list
	data = []
	for row in range(ROWS):
		r = [-1] * COLS
		data.append(r)

	return data

#world	


class Soldier(pygame.sprite.Sprite):
    def __init__(self, char_type, x, y, scale, speed, ammo, grenades):
        pygame.sprite.Sprite.__init__(self)
        self.alive = True
        self.char_type = char_type
        self.speed = speed
        self.health = 100
        self.max_health = self.health
        self.extra_jump = 1
        self.direction = 1
        self.vel_y = 0
        self.jump = False
        self.in_air = True
        self.flip = False
        self.animation_list = []
        self.frame_index = 0
        self.action = 0
        self.update_time = pygame.time.get_ticks()
        self.move_counter = 0
        self.vision = pygame.Rect(0, 0, 150, 20)
        self.idling = False
        self.idling_counter = 0

        animation_types = ['Idle', 'Run', 'Jump', 'Death']
        for animation in animation_types:
            temp_list = []
            num_of_frames = len(os.listdir(f'Shooter-main/img/{self.char_type}/{animation}'))
            for i in range(num_of_frames):
                img = pygame.image.load(f'Shooter-main/img/{self.char_type}/{animation}/{i}.png').convert_alpha()
                img = pygame.transform.scale(img, (int(img.get_width() * scale), int(img.get_height() * scale)))
                temp_list.append(img)
            self.animation_list.append(temp_list)

        self.image = self.animation_list[self.action][self.frame_index]
        self.rect = self.image.get_rect()
        self.rect.center = (x, y)
        self.width = self.image.get_width()
        self.height = self.image.get_height()

    def update(self):
        self.update_animation()  # Ensure animation is updated every frame
        self.check_alive()

        # Cooldown for shooting, if applicable


    def move(self, moving_left, moving_right):
        screen_scroll = 0
        dx = 0
        dy = 0
        level_complete = False

        # Moving left
        if moving_left:
            dx = -self.speed
            self.flip = True
            self.direction = -1

        # Moving right
        if moving_right:
            dx = self.speed
            self.flip = False
            self.direction = 1

        # Handle scrolling
        if self.rect.centerx >= SCREEN_WIDTH // 2 and moving_right:
            screen_scroll = -dx
        if self.rect.centerx <= SCREEN_WIDTH // 2 and moving_left:
            screen_scroll = -dx

#jump
        if self.jump == True and self.in_air == False:
            self.vel_y = -11
            self.jump = False
            self.in_air = True
        elif self.jump == True and self.in_air == True:
            if self.extra_jump == 1:
                self.vel_y = -11
                self.jump = False
                self.in_air = True
                self.extra_jump = 0

        # Apply gravity
        self.vel_y += GRAVITY
        if self.vel_y > 10:
            self.vel_y
        dy += self.vel_y 

        # Check for collisions with tiles
        for tile in world.obstacle_list:
            if tile[1].colliderect(self.rect.x + dx, self.rect.y, self.width, self.height):
                dx = 0
            if tile[1].colliderect(self.rect.x, self.rect.y + dy, self.width, self.height):
                if self.vel_y < 0:
                    self.vel_y = 0
                    dy = tile[1].bottom - self.rect.top
                elif self.vel_y >= 0:
                    self.vel_y = 0
                    self.in_air = False
                    self.extra_jump = 1
                    dy = tile[1].top - self.rect.bottom

        # Ensure the player is still in bounds
        if self.rect.bottom > SCREEN_HEIGHT:
            self.health = 0

        # Check if the player reaches the exit
        for exit_tile in world.exit_group:
            if self.rect.colliderect(exit_tile.rect):
                level_complete = True

        # Update the player’s position
        self.rect.x += dx
        self.rect.y += dy

        # Apply screen scrolling adjustments
        self.rect.x += screen_scroll

        return screen_scroll, level_complete

 

    def update_animation(self):
        ANIMATION_COOLDOWN = 100  # Cooldown time for updating the animation (in milliseconds)

        # Check the current action and update the animation
        self.image = self.animation_list[self.action][self.frame_index]

        # Update the frame only if the cooldown has passed
        if pygame.time.get_ticks() - self.update_time > ANIMATION_COOLDOWN:
            self.frame_index += 1
            self.update_time = pygame.time.get_ticks()

        # If the frame index exceeds the animation frames, reset or loop
        if self.frame_index >= len(self.animation_list[self.action]):
            if self.action == 3:  # Death animation, should freeze at the last frame
                self.frame_index = len(self.animation_list[self.action]) - 1
            else:
                self.frame_index = 0  # Loop the animation for idle, run, or jump

    def update_action(self, new_action):
        if new_action != self.action:
            self.action = new_action
            self.frame_index = 0
            self.update_time = pygame.time.get_ticks()

    def check_alive(self):
        if self.health <= 0:
            self.health = 0
            self.speed = 0
            self.alive = False
            self.update_action(3)

    def draw(self):
        screen.blit(pygame.transform.flip(self.image, self.flip, False), self.rect)





class World:
    def __init__(self):
        self.obstacle_list = []
        self.water_group = pygame.sprite.Group()
        self.enemy_group = pygame.sprite.Group()
        self.item_box_group = pygame.sprite.Group()
        self.decoration_group = pygame.sprite.Group()
        self.exit_group = pygame.sprite.Group()

    def process_data(self, data):
        self.level_length = len(data[0])
        player = None
        health_bar = None

        for y, row in enumerate(data):
            for x, tile in enumerate(row):
                if tile >= 0:
                    img = img_list[tile]
                    img_rect = img.get_rect()
                    img_rect.x = x * TILE_SIZE
                    img_rect.y = y * TILE_SIZE
                    tile_data = (img, img_rect)

                    if tile >= 0 and tile <= 8:
                        self.obstacle_list.append(tile_data)
                    elif tile >= 9 and tile <= 10:
                        water = Water(img, x * TILE_SIZE, y * TILE_SIZE)
                        self.water_group.add(water)
                    elif tile >= 11 and tile <= 14:
                        decoration = Decoration(img, x * TILE_SIZE, y * TILE_SIZE)
                        self.decoration_group.add(decoration)
                    elif tile == 15:
                        player = Soldier('player', x * TILE_SIZE, y * TILE_SIZE, 1.65, 5, 20, 5)
                        health_bar = HealthBar(10, 10, player.health, player.health)


        return player, health_bar

    def draw(self):
        # Scroll and draw obstacles
        for tile in self.obstacle_list:
            tile[1].x += screen_scroll
            screen.blit(tile[0], tile[1])
            
        # Scroll and draw each group
        for group in [self.water_group, self.enemy_group, self.item_box_group,
                    self.decoration_group, self.exit_group]:
            for sprite in group:
                sprite.rect.x += screen_scroll
            group.draw(screen)

    def update(self):
        for tile in self.obstacle_list:
            tile[1].x += screen_scroll
        self.water_group.update()
        self.enemy_group.update()
        self.item_box_group.update()
        self.decoration_group.update()
        self.exit_group.update()

    def reset_level(self):
        self.obstacle_list.clear()
        self.water_group.empty()
        self.enemy_group.empty()
        self.item_box_group.empty()
        self.decoration_group.empty()
        self.exit_group.empty()


class Decoration(pygame.sprite.Sprite):
    def __init__(self, img, x, y):
        pygame.sprite.Sprite.__init__(self)
        self.image = img
        self.rect = self.image.get_rect()
        self.rect.midtop = (x + TILE_SIZE // 2, y + (TILE_SIZE - self.image.get_height()))


    def update(self):
        self.rect.x += screen_scroll




class Water(pygame.sprite.Sprite):
    def __init__(self, img, x, y):
        pygame.sprite.Sprite.__init__(self)
        self.image = img
        self.rect = self.image.get_rect()
        self.rect.midtop = (x + TILE_SIZE // 2, y + (TILE_SIZE - self.image.get_height()))


    def update(self):
        self.rect.x += screen_scroll


class Exit(pygame.sprite.Sprite):
    def __init__(self, img, x, y):
        pygame.sprite.Sprite.__init__(self)
        self.image = img
        self.rect = self.image.get_rect()
        self.rect.midtop = (x + TILE_SIZE // 2, y + (TILE_SIZE - self.image.get_height()))


    def update(self):
        self.rect.x += screen_scroll








    def update(self):
        #scroll
        self.rect.x += screen_scroll
        #check if the player has picked up the box
        if pygame.sprite.collide_rect(self, player):
            #check what kind of box it was
            if self.item_type == 'Health':
                player.health += 25
                if player.health > player.max_health:
                    player.health = player.max_health
            elif self.item_type == 'Ammo':
                player.ammo += 15
            elif self.item_type == 'Grenade':
                player.grenades += 3
            #delete the item box
            self.kill()




class HealthBar():
    def __init__(self, x, y, health, max_health):
        self.x = x
        self.y = y
        self.health = health
        self.max_health = max_health


    def draw(self, health):
        #update with new health
        self.health = health
        #calculate health ratio
        ratio = self.health / self.max_health
        pygame.draw.rect(screen, BLACK, (self.x - 2, self.y - 2, 154, 24))
        pygame.draw.rect(screen, RED, (self.x, self.y, 150, 20))
        pygame.draw.rect(screen, GREEN, (self.x, self.y, 150 * ratio, 20))




class Bullet(pygame.sprite.Sprite):
    def __init__(self, x, y, direction, image):
        pygame.sprite.Sprite.__init__(self)
        self.speed = 6
        self.image = image
        if direction == -1:
            self.image = pygame.transform.flip(self.image, True, False)
        self.rect = self.image.get_rect()
        self.rect.center = (x, y)
        self.direction = direction
        self.invulnerable_time = 0  # Time in frames that the bullet is invulnerable
        
    def update(self):
        # Decrease the invulnerability time (0.3 seconds roughly at 60 FPS = 18 frames)
        if self.invulnerable_time > 0:
            self.invulnerable_time -= 1
        
        # Move the bullet
        self.rect.x += (self.direction * self.speed) + screen_scroll
        
        # Check if bullet has gone off-screen
        if self.rect.right < 0 or self.rect.left > SCREEN_WIDTH:
            self.kill()

        # Check for collision with the world (obstacles)
        for tile in world.obstacle_list:
            if tile[1].colliderect(self.rect) and self.invulnerable_time <= 0:
                self.kill()

        # Check for collision with the player or enemies only if invulnerable time has passed
        if self.invulnerable_time <= 0:
            if pygame.sprite.spritecollide(player, bullet_group, False):
                if player.alive:
                    player.health -= 5
                    self.kill()

            for enemy in enemy_group:
                if pygame.sprite.spritecollide(enemy, bullet_group, False):
                    if enemy.alive:
                        enemy.health -= 25
                        self.kill()

    def make_invulnerable(self):
        # Set invulnerable time (18 frames, roughly 0.3 seconds at 60 FPS)
        self.invulnerable_time = 18




    def update(self):
        self.vel_y += GRAVITY
        dx = self.direction * self.speed
        dy = self.vel_y


        #check for collision with level
        for tile in world.obstacle_list:
            #check collision with walls
            if tile[1].colliderect(self.rect.x + dx, self.rect.y, self.width, self.height):
                self.direction *= -1
                dx = self.direction * self.speed
            #check for collision in the y direction
            if tile[1].colliderect(self.rect.x, self.rect.y + dy, self.width, self.height):
                self.speed = 0
                #check if below the ground, i.e. thrown up
                if self.vel_y < 0:
                    self.vel_y = 0
                    dy = tile[1].bottom - self.rect.top
                #check if above the ground, i.e. falling
                elif self.vel_y >= 0:
                    self.vel_y = 0
                    dy = tile[1].top - self.rect.bottom









class Explosion(pygame.sprite.Sprite):
    def __init__(self, x, y, scale):
        pygame.sprite.Sprite.__init__(self)
        self.images = []
        for num in range(1, 6):
            img = pygame.image.load(f'Shooter-main/img/explosion/exp{num}.png').convert_alpha()
            img = pygame.transform.scale(img, (int(img.get_width() * scale), int(img.get_height() * scale)))
            self.images.append(img)
        self.frame_index = 0
        self.image = self.images[self.frame_index]
        self.rect = self.image.get_rect()
        self.rect.center = (x, y)
        self.counter = 0




    def update(self):
        #scroll
        self.rect.x += screen_scroll


        EXPLOSION_SPEED = 4
        #update explosion amimation
        self.counter += 1


        if self.counter >= EXPLOSION_SPEED:
            self.counter = 0
            self.frame_index += 1
            #if the animation is complete then delete the explosion
            if self.frame_index >= len(self.images):
                self.kill()
            else:
                self.image = self.images[self.frame_index]




class ScreenFade():
    def __init__(self, direction, colour, speed):
        self.direction = direction
        self.colour = colour
        self.speed = speed
        self.fade_counter = 0




    def fade(self):
        fade_complete = False
        self.fade_counter += self.speed
        if self.direction == 1:#whole screen fade
            pygame.draw.rect(screen, self.colour, (0 - self.fade_counter, 0, SCREEN_WIDTH // 2, SCREEN_HEIGHT))
            pygame.draw.rect(screen, self.colour, (SCREEN_WIDTH // 2 + self.fade_counter, 0, SCREEN_WIDTH, SCREEN_HEIGHT))
            pygame.draw.rect(screen, self.colour, (0, 0 - self.fade_counter, SCREEN_WIDTH, SCREEN_HEIGHT // 2))
            pygame.draw.rect(screen, self.colour, (0, SCREEN_HEIGHT // 2 +self.fade_counter, SCREEN_WIDTH, SCREEN_HEIGHT))
        if self.direction == 2:#vertical screen fade down
            pygame.draw.rect(screen, self.colour, (0, 0, SCREEN_WIDTH, 0 + self.fade_counter))
        if self.fade_counter >= SCREEN_WIDTH:
            fade_complete = True


        return fade_complete




#create screen fades
intro_fade = ScreenFade(1, BLACK, 4)
death_fade = ScreenFade(2, PINK, 4)




#create Buttons
start_Button = Button.Button(SCREEN_WIDTH // 2 - 130, SCREEN_HEIGHT // 2 - 150, start_img, 1)
exit_Button = Button.Button(SCREEN_WIDTH // 2 - 110, SCREEN_HEIGHT // 2 + 50, exit_img, 1)
restart_Button = Button.Button(SCREEN_WIDTH // 2 - 100, SCREEN_HEIGHT // 2 - 50, restart_img, 2)


#create sprite groups
enemy_group = pygame.sprite.Group()
bullet_group = pygame.sprite.Group()
grenade_group = pygame.sprite.Group()
explosion_group = pygame.sprite.Group()
item_box_group = pygame.sprite.Group()
decoration_group = pygame.sprite.Group()
water_group = pygame.sprite.Group()
exit_group = pygame.sprite.Group()






#create empty tile list
world_data = []
for row in range(ROWS):
    r = [-1] * COLS
    world_data.append(r)
#load in level data and create world
with open(f'Images/level{level}_data.csv', newline='') as csvfile:
    reader = csv.reader(csvfile, delimiter=',')
    for x, row in enumerate(reader):
        for y, tile in enumerate(row):
            world_data[x][y] = int(tile)
world = World()
player, health_bar = world.process_data(world_data)






run = True
while run:


    clock.tick(FPS)


    if start_game == False:
        #draw menu
        screen.fill(BG)
        #add Buttons
        if start_Button.draw(screen):
            start_game = True
            start_intro = True
        if exit_Button.draw(screen):
            run = False
    else:
        #update background
        draw_bg()
        #draw world map
        world.draw()
        #show player health
        health_bar.draw(player.health)


        player.update()
        player.draw()


        for enemy in enemy_group:
            enemy.ai()
            enemy.update()
            enemy.draw()


        #update and draw groups
        bullet_group.update()
        grenade_group.update()
        explosion_group.update()
        item_box_group.update()
        decoration_group.update()
        water_group.update()
        exit_group.update()
        bullet_group.draw(screen)
        grenade_group.draw(screen)
        explosion_group.draw(screen)
        item_box_group.draw(screen)
        decoration_group.draw(screen)
        water_group.draw(screen)
        exit_group.draw(screen)


        #show intro
        if start_intro == True:
            if intro_fade.fade():
                start_intro = False
                intro_fade.fade_counter = 0




        #update player actions
        if player.alive:
            #shoot bullets
            if player.in_air:
                player.update_action(2)#2: jump
            elif moving_left or moving_right:
                player.update_action(1)#1: run
            else:
                player.update_action(0)#0: idle
            screen_scroll, level_complete = player.move(moving_left, moving_right)
            bg_scroll -= screen_scroll
            #check if player has completed the level
            if level_complete:
                start_intro = True
                level += 1
                bg_scroll = 0
                world_data = reset_level()
                if level <= MAX_LEVELS:
                    #load in level data and create world
                    with open(f'level{level}_data.csv', newline='') as csvfile:
                        reader = csv.reader(csvfile, delimiter=',')
                        for x, row in enumerate(reader):
                            for y, tile in enumerate(row):
                                world_data[x][y] = int(tile)
                    world = World()
                    player, health_bar = world.process_data(world_data)
        else:
            screen_scroll = 0
            if death_fade.fade():
                if restart_Button.draw(screen):
                    death_fade.fade_counter = 0
                    start_intro = True
                    bg_scroll = 0
                    world_data = reset_level()
                    #load in level data and create world
                    with open(f'level{level}_data.csv', newline='') as csvfile:
                        reader = csv.reader(csvfile, delimiter=',')
                        for x, row in enumerate(reader):
                            for y, tile in enumerate(row):
                                world_data[x][y] = int(tile)
                    world = World()
                    player, health_bar = world.process_data(world_data)




    for event in pygame.event.get():
        #quit game
        if event.type == pygame.QUIT:
            run = False
        #keyboard presses
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_a:
                moving_left = True
            if event.key == pygame.K_d:
                moving_right = True
            if event.key == pygame.K_SPACE:
                shoot = True
            if event.key == pygame.K_q:
                grenade = True
            if event.key == pygame.K_w and player.alive:
                player.jump = True
                jump_fx.play()
            if event.key == pygame.K_ESCAPE:
                run = False




        #keyboard Button released
        if event.type == pygame.KEYUP:
            if event.key == pygame.K_a:
                moving_left = False
            if event.key == pygame.K_d:
                moving_right = False
            if event.key == pygame.K_SPACE:
                shoot = False
            if event.key == pygame.K_q:
                grenade = False
                grenade_thrown = False




    pygame.display.update()


pygame.quit()