#include "input.h"
#include <stdio.h>
#include <iostream>

// Constructor
Input::Input()
{
	// Inicializa las variables
	for (int i = 0; i < 17; i++)
	{
		mKeyBindings[i].scancode = 0;
		mKeyBindings[i].active = false;

		mGameControllerBindings[i].button = SDL_CONTROLLER_BUTTON_INVALID;
		mGameControllerBindings[i].active = false;
	}

	discoverGameController();
}

// Destructor
Input::~Input()
{
}

// Asigna uno de los posibles inputs a una tecla del teclado
void Input::bindKey(Uint8 input, SDL_Scancode code)
{
	mKeyBindings[input].scancode = code;
}

// Asigna uno de los posibles inputs a un botón del mando
void Input::bindGameController(Uint8 input, SDL_GameControllerButton button)
{
	mGameControllerBindings[input].button = button;
}

// Comprueba si un input esta activo
bool Input::checkInput(Uint8 input, bool repeat, int device)
{
	bool successKeyboard = false;
	bool successGameController = false;

	if ((device == INPUT_USE_KEYBOARD) || (device == INPUT_USE_ANY))
	{
		const Uint8 *mKeystates = SDL_GetKeyboardState(NULL);

		if (repeat)
		{
			if (mKeystates[mKeyBindings[input].scancode] != 0)
				successKeyboard = true;
			else
				successKeyboard = false;
		}
		else
		{
			if (!mKeyBindings[input].active)
			{
				if (mKeystates[mKeyBindings[input].scancode] != 0)
				{
					mKeyBindings[input].active = true;
					successKeyboard = true;
				}
				else
				{
					successKeyboard = false;
				}
			}
			else
			{
				if (mKeystates[mKeyBindings[input].scancode] == 0)
				{
					mKeyBindings[input].active = false;
					successKeyboard = false;
				}
				else
				{
					successKeyboard = false;
				}
			}
		}
	}
	
	if ((device == INPUT_USE_GAMECONTROLLER) || (device == INPUT_USE_ANY))
	{
		if (repeat)
		{
			if (SDL_GameControllerGetButton(mGameController, mGameControllerBindings[input].button) != 0)
				successGameController = true;
			else
				successGameController = false;
		}
		else
		{
			if (!mGameControllerBindings[input].active)
			{
				if (SDL_GameControllerGetButton(mGameController, mGameControllerBindings[input].button) != 0)
				{
					mGameControllerBindings[input].active = true;
					successGameController = true;
				}
				else
				{
					successGameController = false;
				}
			}
			else
			{
				if (SDL_GameControllerGetButton(mGameController, mGameControllerBindings[input].button) == 0)
				{
					mGameControllerBindings[input].active = false;
					successGameController = false;
				}
				else
				{
					successGameController = false;
				}
			}
		}
	}

	return (successKeyboard || successGameController);
}

// Comprueba si hay un mando conectado
bool Input::discoverGameController()
{
	bool found = false;

	if (SDL_WasInit(SDL_INIT_GAMECONTROLLER) != 1)
		SDL_InitSubSystem(SDL_INIT_GAMECONTROLLER);

	int nJoysticks = SDL_NumJoysticks();
	mNumGamepads = 0;

	// Cuenta el numero de mandos
	for (int i = 0; i < nJoysticks; i++)
		if (SDL_IsGameController(i))
			mNumGamepads++;

	printf(" (%i joysticks found, %i are gamepads)\n", nJoysticks, mNumGamepads);

	if (mNumGamepads > 0)
	{
		found = true;

		for (int i = 0; i < mNumGamepads; i++)
		{
			// Abre el mando y lo añade a la lista
			SDL_GameController *pad = SDL_GameControllerOpen(i);
			if (SDL_GameControllerGetAttached(pad) == 1)
				mConnectedControllers.push_back(pad);
			else
				std::cout << "SDL_GetError() = " << SDL_GetError() << std::endl;
		}

		mGameController = mConnectedControllers[0];
		SDL_GameControllerEventState(SDL_ENABLE);
	}

	return found;
}