#include "GameInternal.h"

#include <SDL_error.h>

#include "CollisionHandler.h"
#include "AssetManager.h"
#include "SoundManager.h"
#include "TileComponent.h"
#include "Direction.h"
#include "Entity.h"
#include "HealthComponent.h"
#include "Map.h"
#include "TextureManager.h"
#include "StatEffectsComponent.h"
#include "Constants.h"
#include "Game.h"
#include "GameFactory.h"

GameInternal::GameInternal() :
	manager(this),
	tiles(manager.getGroup((size_t)Entity::GroupLabel::MAPTILES)),
	players(manager.getGroup((size_t)Entity::GroupLabel::PLAYERS)),
	projectiles(manager.getGroup((size_t)Entity::GroupLabel::PROJECTILE)),
	hearts(manager.getGroup((size_t)Entity::GroupLabel::HEARTS)),
	powerups(manager.getGroup((size_t)Entity::GroupLabel::POWERUPS))
{};

GameInternal::~GameInternal() = default;

void GameInternal::init(const char* title, int xpos, int ypos, int width, int height, bool fullscreen)
{
	GameInternal::assets = new AssetManager(&manager);
	GameInternal::textureManager = new TextureManager(&manager);
	GameInternal::soundManager = new SoundManager();
	GameInternal::collisionHandler = new CollisionHandler(manager); // why does this use a referrence, but AssetManager a pointer?
	
	int flags = 0;
	if (fullscreen)
	{
		flags = SDL_WINDOW_FULLSCREEN;
	}

	if (SDL_Init(SDL_INIT_EVERYTHING) != 0)
	{
		std::cout << "ERROR. Subsystem couldnt be initialized! " << SDL_GetError() << std::endl;
		SDL_ClearError();
		return;
	}

	if (Mix_Init(MIX_INIT_MP3) != MIX_INIT_MP3) {
		std::cout << "ERROR. Subsystem couldnt be initialized!" << std::endl;
		return;
	}

	window = SDL_CreateWindow(title, xpos, ypos, width, height, flags);
	if (!window)
	{
		std::cout << "ERROR: Window couldnt be created! " << SDL_GetError() << std::endl;
		SDL_ClearError();
		return;
	}

    SDL_Surface* icon = SDL_LoadBMP("assets/iconImage.bmp");
    if(!icon)
    {
        std::cout << "ERROR: Couldn't create icon!" << std::endl;
        return;
    }

    SDL_SetWindowIcon(window, icon);

	renderer = SDL_CreateRenderer(window, -1, 0);
	if (!renderer)
	{
		std::cout << "ERROR: Renderer couldnt be created! " << SDL_GetError() << std::endl;
		SDL_ClearError();
		return;
	}
	SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);

	SDL_Texture* backgroundTexture = GameInternal::textureManager->loadTexture("assets/startscreen.png");

	SDL_RenderClear(renderer);
	SDL_RenderCopy(renderer, backgroundTexture, NULL, NULL);
	SDL_RenderPresent(renderer);

	if (Mix_OpenAudio(44100, MIX_DEFAULT_FORMAT, 2, 2048) < 0)
	{
		std::cout << "ERROR: Mixer couldnt be initialized! " << SDL_GetError() << std::endl;
		SDL_ClearError();
		return;
	}

	Mix_Volume(-1, MIX_MAX_VOLUME);
	Mix_AllocateChannels(16);

	//SDL_Event event;
	bool hasQuit = false;

	while (!hasQuit)
	{
		SDL_PollEvent(&event);

		if (event.type == SDL_QUIT)
		{
			hasQuit = true;
			break;
		}

		if (event.type == SDL_KEYDOWN)
		{
			if (event.key.keysym.scancode == SDL_SCANCODE_RETURN)
			{
				std::cout << "Enter pressed > Game start..." << std::endl;
				break;
			}

			if (event.key.keysym.scancode == SDL_SCANCODE_ESCAPE)
			{
				std::cout << "Escape pressed > Game quit..." << std::endl;
				hasQuit = true;
			}
		}
	}

	if (hasQuit)
	{
		this->setRunning(false);
		return;
	}

	if (this->isRunning() == false) return;

	map = new Map();

	// loading sounds
	assets->addSoundEffect("throw_egg", "assets/sound/throw_egg.wav");
	assets->addSoundEffect("steps", "assets/sound/steps.wav");

	this->gameInstance = GameFactory::instance().create(this);
	this->gameInstance->init();
}

void GameInternal::handleEvents()
{
	SDL_PollEvent(&event);

	switch (event.type)
	{
		case SDL_QUIT: this->setRunning(false);
			break;

		default:
			break;
	}
}

void GameInternal::update()
{
	manager.refresh();
	manager.update();

	this->gameInstance->update(); // TODO: this might have to be split up into two update functions, before and after manager...
}

void GameInternal::render()
{
	SDL_RenderClear(renderer);
	for (auto& t : tiles)
		t->draw();

	for (auto& p : powerups)
		p->draw();

	for (auto& p : players)
		p->draw();

	for (auto& p : projectiles)
		p->draw();

	for (auto& h : hearts)
		h->draw();

	SDL_RenderPresent(renderer);
}

void GameInternal::clean()
{
	delete(textureManager);
	SDL_DestroyRenderer(renderer);
	SDL_DestroyWindow(window);
	SDL_Quit();
	std::cout << "Game Cleaned!" << std::endl;
}

bool GameInternal::isRunning() const
{
	return running;
}

void GameInternal::setRunning(bool running) //TODO: might be depracted
{
	this->running = running;
}

void GameInternal::stopGame()
{
	this->running = false;
}