CoreApplication.cpp

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/*
 * =====================================================================================
 *
 *       Filename:  CoreApplication.cpp
 *
 *    Description:
 *
 *        Created:  14/06/2018 02:00:18
 *
 *         Author:  Quentin Bazin, <quent42340@gmail.com>
 *
 * =====================================================================================
 */
#include <ctime>

#include "gk/audio/AudioPlayer.hpp"
#include "gk/core/CoreApplication.hpp"
#include "gk/core/Mouse.hpp"
#include "gk/core/Exception.hpp"

namespace gk {

CoreApplication::CoreApplication(int argc, char **argv) : m_argumentParser(argc, argv) {
}

void CoreApplication::init() {
    std::srand(std::time(nullptr));

    Mouse::setWindow(&m_window);

    ApplicationStateStack::setInstance(m_stateStack);
    ResourceHandler::setInstance(m_resourceHandler);

    m_argumentParser.addArgument("mute", {"", "--no-sound"});
    m_argumentParser.parse();
    if (m_argumentParser.getArgument("mute").isFound)
        AudioPlayer::setMuteState(true);
    // m_argumentParser.debug();
}

int CoreApplication::run(bool isProtected) {
    auto runGame = [&]() {
        if (m_loadSDL)
            m_sdlLoader.load();

        init();
        mainLoop();
    };

    if (isProtected) {
        try {
            runGame();
        }
        catch(const Exception &e) {
            std::cerr << "Fatal error " << e.what() << std::endl;
            return 1;
        }
        // catch(const std::exception &e) {
        //  std::cerr << "Exception caught: " << e.what() << std::endl;
        //  return 1;
        // }
        // catch(...) {
        //  std::cerr << "Fatal error: Unknown error." << std::endl;
        //  return 1;
        // }
    }
    else {
        runGame();
    }

    return 0;
}

void CoreApplication::createWindow(u16 screenWidth, u16 screenHeight, const char *windowTitle) {
    m_window.open(windowTitle, screenWidth, screenHeight);
}

void CoreApplication::onEvent(const SDL_Event &event) {
    if (event.type == SDL_QUIT) {
        m_window.close();
    }
}

void CoreApplication::handleEvents() {
    SDL_Event event;
    while (SDL_PollEvent(&event)) {
        onEvent(event);

        if (!m_stateStack.empty())
            m_stateStack.top().onEvent(event);
    }
}

void CoreApplication::mainLoop() {
    while(m_window.isOpen() && m_stateStack.size()) {
        handleEvents();

        m_clock.updateGame([&] {
            if (!m_stateStack.empty())
                m_stateStack.top().update();

            m_stateStack.clearDeletedStates();
        });

        m_clock.drawGame([&] {
            m_window.clear();

            if(!m_stateStack.empty())
                m_window.draw(m_stateStack.top(), m_renderStates);

            m_window.display();
        });
    }
}

} // namespace gk