#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QQmlContext>
#include <QtQml>
#include <QDebug>
#include "input/InputManager.h"
#include "library/LibraryDatabase.h"
#include "library/GameRepository.h"
#include "library/GameLibraryModel.h"

int main(int argc, char *argv[])
{
    // creates our Qt GUI app
    QGuiApplication app(argc, argv);

    // opens nomad's persistent library database, ensures ready schema, etc
    LibraryDatabase libraryDatabase;

    if (!libraryDatabase.open()) {
        qCritical() << "Failed to open nomad library:" << libraryDatabase.lastError();

        return -1;
    }

    // GameRepository hadnles reading our game records from the database, while
    // GameLibraryModel exposes those records in a QML-friendly list model
    GameRepository gameRepository(libraryDatabase.database());
    GameLibraryModel gameLibraryModel(gameRepository);

    // database diagnostics
    qDebug() << "Library database:" << libraryDatabase.databasePath(); 
    qDebug() << "Games loaded:" << gameLibraryModel.rowCount();

    // creats InputManager and installs it as an application-wide event filter so it can observe input events before normal delivery
    InputManager inputManager;
    app.installEventFilter(&inputManager);

    // Expose InputManager's Qt meta-object to QML under the NomadInput module, for ease of reading code.
    // This lets us refer to inputs as InputManager.Left, InputManager.Right, et cetera
    // QML isn't allowed to create it's own
    qmlRegisterUncreatableMetaObject(InputManager::staticMetaObject, "NomadInput", 1, 0, "InputManager", "InputManager is created by nomad");

    // start up the QML engine
    QQmlApplicationEngine engine;
    // make our InputManager instance available to QML for signals
    engine.rootContext()->setContextProperty("inputManager", &inputManager);
    engine.rootContext()->setContextProperty("gameLibraryModel", &gameLibraryModel);

    // load our Main.qml into the engine to start things off
    engine.loadFromModule("nomad", "Main");

    // makes sure we've got QML objects
    if (engine.rootObjects().isEmpty()) {
        return -1;
    }

    // Start the event loop and keeps nomad running until it exits
    return app.exec();
}