#include <memory>

//
// Created by trotfunky on 06/06/19.
//

#include "Game.h"


Game::Game(std::vector<std::string>& levels, std::vector<std::string>& textures) : levelFiles(std::move(levels)),
    textureFiles(std::move(textures)), running(false), ruleCount(0)
{
    loadTextures();
}

void Game::loadLevel(int levelID)
{
    // TODO : Reset rules when reseting level
    running = false;

    pugi::xml_document document;
    pugi::xml_parse_result result = document.load_file((pro_maat::levelFolder+levelFiles.at(levelID)).c_str());

    if(!result)
    {
        pro_maat::errorWindow(result.description());
    }

    currentLevel = std::make_unique<Level>(document,textures,levelID);
}

void Game::loadTextures()
{
    textures.reserve(textureFiles.size());
    for(const std::string& filePath : textureFiles)
    {
        textures.emplace_back(std::make_unique<sf::Texture>());
        textures.back()->loadFromFile(pro_maat::textureFolder+filePath);
    }
}

void Game::runGame()
{
    sf::RenderWindow window(sf::VideoMode(1280,1024),"Project Maat");

    sf::Clock clock;

    tgui::Gui gui(window);
    addWidgets(gui);

    while (window.isOpen())
    {
        sf::Event event;
        while (window.pollEvent(event))
        {
            if (event.type == sf::Event::Closed)
            {
                window.close();
            }

            gui.handleEvent(event);
        }
        if (running && clock.getElapsedTime().asMilliseconds() >= 200)
        {
            currentLevel->runStep();
            clock.restart();
        }
        window.clear(sf::Color::White);
        // TODO : Consider drawing in a sf::RenderTexture to allow positioning the level at a fixed position ?
        currentLevel->render(window);
        gui.draw();
        window.display();
    }
}

void Game::addWidgets(tgui::Gui& gui)
{
    tgui::Button::Ptr button = tgui::Button::create("Start");
    button->setSize("10%","5%");
    button->setPosition("89%","94%");
    button->connect("pressed",&Game::setRunning,this,true,std::ref(gui));
    gui.add(button,"start");

    // TODO : Use clone/copy ?
    button = tgui::Button::create("Stop");
    button->setSize("10%","5%");
    button->setPosition("79%","94%");
    button->connect("pressed",&Game::setRunning,this,false,std::ref(gui));
    gui.add(button,"stop");

    button = tgui::Button::create("Reset");
    button->setSize("10%","5%");
    button->setPosition("69%","94%");
    button->connect("pressed",&Game::loadLevel,this,currentLevel->getLevelID());
    gui.add(button,"reset");

    button = tgui::Button::create("Add a new rule");
    button->setSize("10%","5%");
    button->setPosition("89%","6%");
    button->connect("pressed",&Game::addRule,this,std::ref(gui));
    gui.add(button,"add");
}

Game::operator bool() const
{
    return (currentLevel ? true : false);
}

//
// Widget callbacks
//

void Game::setRunning(bool newState, tgui::Gui& gui)
{
    running = newState;

    // TODO : Iterate over all rules

    auto affectedTypeCombo = gui.get<tgui::ComboBox>("AffectedType0");
    if(!affectedTypeCombo) return;
    auto targetTypeCombo = gui.get<tgui::ComboBox>("TargetType0");
    if(!targetTypeCombo) return;
    auto actionCombo = gui.get<tgui::ComboBox>("Action0");
    if(!actionCombo) return;

    // If the rule is complete only
    if(!affectedTypeCombo->getSelectedItem().isEmpty() &&
       !targetTypeCombo->getSelectedItem().isEmpty() &&
       !actionCombo->getSelectedItem().isEmpty())
    {
        currentLevel->addRule(Entity::entityTypeLookup.at(affectedTypeCombo->getSelectedItem()),
                              Entity::stateLookup.at(actionCombo->getSelectedItem()),
                              Entity::entityTypeLookup.at(targetTypeCombo->getSelectedItem()));
    }

}

void Game::addRule(tgui::Gui& gui)
{
    if(ruleCount >= pro_maat::maxRules) return;

    // To update names with indexes
    std::stringstream string;


    tgui::ComboBox::Ptr combo = tgui::ComboBox::create();
    combo->addItem("Citizen");
    combo->addItem("Noble");
    combo->setPosition("85%","5%");

    // TODO : Move height according to number of rules
    // Keep the proportions while moving
//    sf::Vector2f tempPos = combo->getPosition();
//    tempPos.y += tempPos.y*2*ruleCount;
//    combo->setPosition(tempPos);
    combo->setSize("5%","2%");

    string << "AffectedType" << ruleCount;
    gui.add(combo,string.str());
    string.str("");

    // TODO : Use clone/copy ?
    combo = tgui::ComboBox::create();
    combo->addItem("Citizen");
    combo->addItem("Noble");
    combo->addItem("House");
    combo->setSize("5%","2%");
    combo->setPosition("95%","5%");

    // Keep the proportions while moving
//    tempPos = combo->getPosition();
//    tempPos.y += tempPos.y*2*ruleCount;
//    combo->setPosition(tempPos);

    string << "TargetType" << ruleCount;
    gui.add(combo,string.str());
    string.str("");

    combo = tgui::ComboBox::create();
    combo->addItem("Seek");
    combo->addItem("Flee");
    combo->setSize("4%","2%");
    combo->setPosition("90.5%","5%");

    // Keep the proportions while moving
//    tempPos = combo->getPosition();
//    tempPos.y += tempPos.y*2*ruleCount;
//    combo->setPosition(tempPos);

    string << "Action" << ruleCount;
    gui.add(combo,string.str());
    string.str("");

    // TODO : Move the button down with each rule then hide it
    // TODO : Hide button when max rules hit
    // FIXME : Cannot hide ?
    gui.get<tgui::Button>("add")->setSize("0%","0%");
    gui.get<tgui::Button>("add")->setTextSize(0);
    gui.get<tgui::Button>("add")->setPosition("-10%","-10%");

    ruleCount++;
}