/**
*	@author: Thomas Brandého
*/

#include "input.h"

#include <iostream>
#include <SFML/Window.hpp>
#include <list>

Input::Input(sf::Window* w, std::string keysmappings, int nb_actions): window(w)
{
    keysmap= KeysMap(keysmappings, nb_actions);
	heldkeys = std::vector<sf::Keyboard::Key>();
	action_file = std::queue<int>();
	window->setKeyRepeatEnabled(false);
	/* test */
	std::vector<int> mv;
	mv.push_back(0);
	current_context = "default";
	keybindings[current_context] = KeyBindings(mv,&keysmap);
//	std::cerr << keybindings[current_context].getPressedAction(sf::Keyboard::I) << std::endl;
}

int Input::getKeyBinding(int action,int num){
	return keysmap.getKeyBinding(action,num-1); //offset num between 0 and 1
}

void Input::setkeyBinding(int action, int num, sf::Keyboard::Key key){
	keysmap.setKeyBinding(action,num-1,key);
}

void Input::setTypeAction(int action, int type)
{
	keysmap.setTypeAction(action, type);
}

void Input::createContext(std::string context_name, std::vector<int> action_list)
{
	contexts[context_name]=action_list;
}

void Input::setCurrentContext(std::string context_name){
	current_context = context_name;
}


void Input::reloadKeyBindings(){
	for (auto iter= keybindings.begin(); iter != keybindings.end(); ++iter){
		iter->second= KeyBindings(contexts[iter->first],&keysmap);
	}
}

void Input::updateEvents(){
	sf::Event event;
	KeyBindings kb;

	/* TEST ------------------------------------------------- */

//	for(auto iter= kb.bindings_hold.begin(); iter != kb.bindings_hold.end(); ++iter){
//		std::cerr <<  iter->second << std::endl;
//	}

	/* ------------------------------------------------------- */

	/* reset variables */
	closeRequested = false;

	/* global affectation */
	kb = keybindings[current_context];

	/* event-parsing loop */
    while(window->pollEvent(event)){
		switch(event.type){
			case sf::Event::Closed:
				closeRequested = true;
				break;
			case sf::Event::TextEntered:
				// add text entered to buffer
				break;
			case sf::Event::KeyPressed:
				action_file.push(kb.getPressedAction(event.key.code));
				heldkeys.push_back(event.key.code);
				break;
			case sf::Event::KeyReleased:
				action_file.push(kb.getReleasedAction(event.key.code));
				releaseHeldKeys(event.key.code);
				break;
			case sf::Event::MouseButtonPressed:
				action_file.push(kb.getPressedAction(sf::Keyboard::KeyCount + event.mouseButton.button));
				heldkeys.push_back((sf::Keyboard::Key) (sf::Keyboard::KeyCount + event.mouseButton.button));
				break;
			case sf::Event::MouseButtonReleased:
				action_file.push(kb.getReleasedAction(sf::Keyboard::KeyCount + event.mouseButton.button));
				releaseHeldKeys((sf::Keyboard::Key) (sf::Keyboard::KeyCount + event.mouseButton.button));
				break;
			case sf::Event::MouseWheelScrolled:
				if (event.mouseWheelScroll.wheel == sf::Mouse::VerticalWheel)
					delta_vertical_scroll = event.mouseWheelScroll.delta;
				break;
			case sf::Event::MouseEntered:
				// action MouseEntered
				break;
			case sf::Event::MouseLeft:
				//action MouseLeft
				break;

		}
		for (auto key: heldkeys){
			action_file.push(kb.getHoldAction(key));
		}
	}
}

int Input::getAction(){
	if (action_file.empty())
		return -1;
	int val = action_file.front();
	action_file.pop();
	return val;
}


/* window-related function */

bool Input::isCloseRequested()
{
	return closeRequested;
}


/* keyboard-related function */

bool Input::isKeyPressed(int key)
{
	return sf::Keyboard::isKeyPressed((sf::Keyboard::Key) key);
}

void Input::releaseHeldKeys(sf::Keyboard::Key keycode){
	auto iter = heldkeys.begin();
	while(*iter != keycode) ++iter;
	heldkeys.erase(iter);
}

/* mouse-related function */

sf::Vector2i Input::getPosition()
{
	mouse_position = sf::Mouse::getPosition();
	return mouse_position;
}

sf::Vector2i Input::getDeltaPosition()
{
	sf::Vector2i last_position = mouse_position;
	mouse_position = sf::Mouse::getPosition();
	return mouse_position - last_position;
}

int Input::getDeltaVerticalScroll()
{
	return delta_vertical_scroll;
}


void Input::test()
{
	std::cerr << keysmap.getTypeAction(1) << std::endl;
	std::cerr << keysmap.getKeyBinding(1,0) << std::endl;
	KeyBindings	kb = keybindings[current_context];
	int action;
	action = kb.getPressedAction(sf::Keyboard::I);
	if (action != NO_ACTION)
		std::cerr << action << std::endl;
	action = kb.getPressedAction(sf::Keyboard::O);
	if (action != NO_ACTION)
		std::cerr << action << std::endl;
}