#include "credits.h"

// Constructor
Credits::Credits(SDL_Renderer *renderer, Screen *screen, Asset *asset)
{
	// Copia la dirección de los objetos
	this->renderer = renderer;
	this->screen = screen;
	this->asset = asset;

	// Reserva memoria para los punteros
	eventHandler = new SDL_Event();
	text = new Text(asset->get("smb2.png"), asset->get("smb2.txt"), renderer);

	// Inicializa variables
	counter = 0;
	counterEnabled = true;
	subCounter = 0;
	section.name = SECTION_PROG_CREDITS;
	section.subsection = 0;
	ticks = 0;
	ticksSpeed = 15;

	// Cambia el color del borde
	screen->setBorderColor(stringToColor("black"));

	// Inicializa los textos
	texts.push_back({"", stringToColor("white")});
	texts.push_back({"INSTRUCTIONS:", stringToColor("yellow")});
	texts.push_back({"", stringToColor("white")});
	texts.push_back({"HELP JAILDOC TO GET BACK ALL HIS", stringToColor("white")});
	texts.push_back({"PROJECTS AND GO TO THE JAIL TO", stringToColor("white")});
	texts.push_back({"FINISH THEM", stringToColor("white")});
	texts.push_back({"", stringToColor("white")});
	texts.push_back({"", stringToColor("white")});

	texts.push_back({"KEYS:", stringToColor("yellow")});
	texts.push_back({"", stringToColor("white")});
	texts.push_back({"USE CURSORS TO MOVE AND JUMP", stringToColor("white")});
	texts.push_back({"F1-F4 TO CHANGE WINDOWS SIZE", stringToColor("white")});
	texts.push_back({"F TO SWITCH TO FULLSCREEN", stringToColor("white")});
	texts.push_back({"B TO DE/ACTIVATE THE BORDER SC.", stringToColor("white")});
	texts.push_back({"M TO TURN ON/OFF THE MUSIC", stringToColor("white")});
	texts.push_back({"ESC TO EXIT GAME", stringToColor("white")});
	texts.push_back({"", stringToColor("white")});
	texts.push_back({"", stringToColor("white")});

	texts.push_back({"A GAME BY JAILDESIGNER", stringToColor("yellow")});
	texts.push_back({"MADE ON SUMMER/FALL 2022", stringToColor("yellow")});
	texts.push_back({"", stringToColor("white")});
	texts.push_back({"", stringToColor("white")});

	texts.push_back({"LOVE JAILGAMES!}", stringToColor("white")});
	texts.push_back({"", stringToColor("white")});

	// Crea la textura para el texto que se escribe en pantalla
	textTexture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, GAMECANVAS_WIDTH, GAMECANVAS_HEIGHT);
	if (textTexture == nullptr)
	{
		printf("Error: textTexture could not be created!\nSDL Error: %s\n", SDL_GetError());
	}
	SDL_SetTextureBlendMode(textTexture, SDL_BLENDMODE_BLEND);

	// Crea la textura para cubrir el rexto
	coverTexture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, GAMECANVAS_WIDTH, GAMECANVAS_HEIGHT);
	if (coverTexture == nullptr)
	{
		printf("Error: coverTexture could not be created!\nSDL Error: %s\n", SDL_GetError());
	}
	SDL_SetTextureBlendMode(coverTexture, SDL_BLENDMODE_BLEND);

	// Escribe el texto en la textura
	fillTexture();
}

// Destructor
Credits::~Credits()
{
	delete eventHandler;
	delete text;
	SDL_DestroyTexture(textTexture);
	SDL_DestroyTexture(coverTexture);
}

// Comprueba el manejador de eventos
void Credits::checkEventHandler()
{
	// Comprueba los eventos que hay en la cola
	while (SDL_PollEvent(eventHandler) != 0)
	{
		// Evento de salida de la aplicación
		if (eventHandler->type == SDL_QUIT)
		{
			section.name = SECTION_PROG_QUIT;
			break;
		}

		// Comprueba si se ha pulsado alguna tecla
		else if ((eventHandler->type == SDL_KEYDOWN) and (eventHandler->key.repeat == 0))
		{
			switch (eventHandler->key.keysym.scancode)
			{
			case SDL_SCANCODE_ESCAPE:
				section.name = SECTION_PROG_QUIT;
				break;

			default:
				section.name = SECTION_PROG_TITLE;
				section.subsection = 0;
				break;
			}
		}
	}
}

// Escribe el texto en la textura
void Credits::fillTexture()
{
	// Rellena la textura de texto
	SDL_SetRenderTarget(renderer, textTexture);
	const color_t c = stringToColor("black");
	SDL_SetRenderDrawColor(renderer, c.r, c.g, c.b, 0x00);
	SDL_RenderClear(renderer);

	// Escribe el texto en la textura
	const int size = text->getCharacterSize();
	int i = 0;

	for (auto t : texts)
	{
		text->writeDX(TXT_CENTER | TXT_COLOR, PLAY_AREA_CENTER_X, i * size, t.label, 1, t.color);
		i++;
	}

	SDL_SetRenderTarget(renderer, nullptr);

	// Rellena la textura que cubre el texto
	SDL_SetRenderTarget(renderer, coverTexture);
	SDL_SetRenderDrawColor(renderer, c.r, c.g, c.b, 0x00);
	SDL_RenderClear(renderer);

	// Los primeros 8 pixels crea una malla
	SDL_SetRenderDrawColor(renderer, c.r, c.g, c.b, 0xFF);
	for (int i = 0; i < 256; i += 2)
	{
		SDL_RenderDrawPoint(renderer, i, 0);
		SDL_RenderDrawPoint(renderer, i, 2);
		SDL_RenderDrawPoint(renderer, i, 4);
		SDL_RenderDrawPoint(renderer, i, 6);

		SDL_RenderDrawPoint(renderer, i + 1, 1);
		SDL_RenderDrawPoint(renderer, i + 1, 3);
		SDL_RenderDrawPoint(renderer, i + 1, 5);
		SDL_RenderDrawPoint(renderer, i + 1, 7);
	}

	// El resto se rellena de color
	SDL_Rect rect = {0, 8, 256, 192};
	SDL_RenderFillRect(renderer, &rect);

	SDL_SetRenderTarget(renderer, nullptr);
}

// Actualiza el contador
void Credits::updateCounter()
{
	// Incrementa el contador
	if (counterEnabled)
	{
		counter++;
		if (counter == 224 || counter == 544 || counter == 672)
		{
			counterEnabled = false;
		}
	}
	else
	{
		subCounter++;
		if (subCounter == 100)
		{
			counterEnabled = true;
			subCounter = 0;
		}
	}

	// Comprueba si ha terminado la sección
	if (counter > 1000)
	{
		section.name = SECTION_PROG_DEMO;
	}
}

// Actualiza las variables
void Credits::update()
{
	// Comprueba que la diferencia de ticks sea mayor a la velocidad del juego
	if (SDL_GetTicks() - ticks > ticksSpeed)
	{
		// Actualiza el contador de ticks
		ticks = SDL_GetTicks();

		// Comprueba el manejador de eventos
		checkEventHandler();

		// Actualiza el contador
		updateCounter();
	}
}

// Dibuja en pantalla
void Credits::render()
{
	// Prepara para empezar a dibujar en la textura de juego
	screen->start();

	// Limpia la pantalla
	screen->clean();

	// Dibuja la textura con el texto en pantalla
	SDL_RenderCopy(renderer, textTexture, nullptr, nullptr);

	// Dibuja la textura que cubre el texto
	const int offset = std::min(counter / 8, 192 / 2);
	SDL_Rect rect = {0, offset * 2, 256, 192};
	SDL_RenderCopy(renderer, coverTexture, nullptr, &rect);

	// text->write(0,0,std::to_string(counter));
	// text->write(0,8,std::to_string(counterEnabled));

	// Vuelca el contenido del renderizador en pantalla
	screen->blit();
}

// Bucle para el logo del juego
section_t Credits::run()
{
	while (section.name == SECTION_PROG_CREDITS)
	{
		update();
		render();
	}

	return section;
}