// #include <QtCore>
#include <QCoreApplication>
#include <QSysInfo>
#include <QDir>
#include <QCommandLineParser>
#include <QImageReader>

#include "comic_db.h"
#include "db_helper.h"
#include "yacreader_http_server.h"
#include "yacreader_global.h"
#include "yacreader_libraries.h"
#include "yacreader_local_server.h"

#include "libraries_updater.h"

#include "console_ui_library_creator.h"

#include <iostream>

#include "QsLog.h"
#include "QsLogDest.h"

using namespace QsLogging;
// Returns false in case of a parse error (unknown option or missing value); returns true otherwise.

void logSystemAndConfig()
{
    QLOG_INFO() << "---------- System & configuration ----------";
    QLOG_INFO() << "OS:" << QSysInfo::prettyProductName() << "Version: " << QSysInfo::productVersion();
    QLOG_INFO() << "Kernel:" << QSysInfo::kernelType() << QSysInfo::kernelVersion() << "Architecture:" << QSysInfo::currentCpuArchitecture();
    /* TODO: qrencode could be helpfull for showing a qr code in the web client for client devices
#if defined Q_OS_UNIX && !defined Q_OS_MAC
    if(QFileInfo(QString(BINDIR)+"/qrencode").exists())
#else
    if(QFileInfo(QCoreApplication::applicationDirPath()+"/utils/qrencode.exe").exists() || QFileInfo("./util/qrencode").exists())
#endif
        QLOG_INFO() << "qrencode : found";
    else
        QLOG_INFO() << "qrencode : not found";
        */

    QLOG_INFO() << "Libraries: " << DBHelper::getLibraries().getLibraries();
    QLOG_INFO() << "--------------------------------------------";
}

void messageHandler(QtMsgType type, const QMessageLogContext &context, const QString &msg)
{
    Q_UNUSED(context);

    QByteArray localMsg = msg.toLocal8Bit();
    switch (type) {
    case QtInfoMsg: {
        QLOG_INFO() << localMsg.constData();
        break;
    }
    case QtDebugMsg: {
        QLOG_DEBUG() << localMsg.constData();
        break;
    }

    case QtWarningMsg: {
        QLOG_WARN() << localMsg.constData();
        break;
    }

    case QtCriticalMsg: {
        QLOG_ERROR() << localMsg.constData();
        break;
    }

    case QtFatalMsg: {
        QLOG_FATAL() << localMsg.constData();
        break;
    }
    }
}

int main(int argc, char **argv)
{
    qInstallMessageHandler(messageHandler);

    QCoreApplication app(argc, argv);

#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
    QImageReader::setAllocationLimit(0);
#endif

    app.setApplicationName("YACReaderLibrary");
    app.setOrganizationName("YACReader");

    QString buildNumber = ".0";

#ifdef BUILD_NUMBER
    buildNumber = QString(".%1").arg(BUILD_NUMBER);
#endif

    app.setApplicationVersion(VERSION + buildNumber);

    QTextStream qout(stdout);

    // general help
    QTranslator translator;
    QString sufix = QLocale::system().name();

#if defined Q_OS_UNIX && !defined Q_OS_MAC
    translator.load(QString(DATADIR) + "/yacreader/languages/yacreaderlibrary_" + sufix);
#else
    translator.load(QCoreApplication::applicationDirPath() + "/languages/yacreaderlibrary_" + sufix);
#endif
    app.installTranslator(&translator);

    QCommandLineParser parser;
    parser.setApplicationDescription(QCoreApplication::tr("\nYACReaderLibraryServer is the headless (no gui) version of YACReaderLibrary"));
    parser.addHelpOption();
    const QCommandLineOption versionOption = parser.addVersionOption();
    parser.addPositionalArgument("command", "The command to execute. [start, create-library, update-library, add-library, remove-library, list-libraries, set-port]");
    parser.addOption({ "loglevel", "Set log level. Valid values: trace, info, debug, warn, error.", "loglevel", "info" });
    parser.addOption({ "port", "Set server port (temporary). Valid values: 1-65535", "port" });
    parser.parse(app.arguments());

    const QStringList args = parser.positionalArguments();
    const QString command = args.isEmpty() ? QString() : args.first();

    if (parser.isSet(versionOption)) {
        qout << "YACReaderLibraryServer"
             << " " << VERSION << Qt::endl;

        return 0;
    }

    QSettings *settings = new QSettings(YACReader::getSettingsPath() + "/" + QCoreApplication::applicationName() + ".ini", QSettings::IniFormat);
    settings->beginGroup("libraryConfig");

    if (command == "start") {
        parser.clearPositionalArguments();
        parser.addPositionalArgument("start", "Start YACReaderLibraryServer");
        parser.process(app);

        QString destLog = YACReader::getSettingsPath() + "/yacreaderlibrary.log";
        QDir().mkpath(YACReader::getSettingsPath());

        Logger &logger = Logger::instance();

        if (parser.isSet("loglevel")) {
            if (parser.value("loglevel") == "trace") {
                logger.setLoggingLevel(QsLogging::TraceLevel);
            } else if (parser.value("loglevel") == "info") {
                logger.setLoggingLevel(QsLogging::InfoLevel);
            } else if (parser.value("loglevel") == "debug") {
                logger.setLoggingLevel(QsLogging::DebugLevel);
            } else if (parser.value("loglevel") == "warn") {
                logger.setLoggingLevel(QsLogging::WarnLevel);
            } else if (parser.value("loglevel") == "error") {
                logger.setLoggingLevel(QsLogging::ErrorLevel);
            } else {
                parser.showHelp();
            }
        }

        DestinationPtrU fileDestination(DestinationFactory::MakeFileDestination(
                destLog, LogRotationOption::EnableLogRotation, MaxSizeBytes(1048576), MaxOldLogCount(2)));
        DestinationPtrU debugDestination(DestinationFactory::MakeDebugOutputDestination());
        logger.addDestination(std::move(debugDestination));
        logger.addDestination(std::move(fileDestination));

        QTranslator translator;
        QString sufix = QLocale::system().name();
#if defined Q_OS_UNIX && !defined Q_OS_MAC
        translator.load(QString(DATADIR) + "/yacreader/languages/yacreaderlibrary_" + sufix);
#else
        translator.load(QCoreApplication::applicationDirPath() + "/languages/yacreaderlibrary_" + sufix);
#endif
        app.installTranslator(&translator);

        QTranslator viewerTranslator;
#if defined Q_OS_UNIX && !defined Q_OS_MAC
        viewerTranslator.load(QString(DATADIR) + "/yacreader/languages/yacreader_" + sufix);
#else
        viewerTranslator.load(QCoreApplication::applicationDirPath() + "/languages/yacreader_" + sufix);
#endif
        app.installTranslator(&viewerTranslator);

        qRegisterMetaType<ComicDB>("ComicDB");

        QLOG_INFO() << "YACReaderLibraryServer attempting to start";

        logSystemAndConfig();

        if (YACReaderLocalServer::isRunning()) // allow one server instance
        {
            QLOG_WARN() << "another instance of YACReaderLibrary is running";
#ifdef Q_OS_WIN
            logger.shutDownLoggerThread();
#endif
            return 0;
        }

        QLOG_INFO() << "YACReaderLibrary starting";

        // server
        YACReaderHttpServer *httpServer = new YACReaderHttpServer();
        if (parser.isSet("port")) {
            bool valid;
            qint32 port = parser.value("port").toInt(&valid);
            if (!valid || port < 1 || port > 65535) {
                qout << "Error: " << parser.value("port") << " is not a valid port" << Qt::endl;
                parser.showHelp();
                return 0;
            } else {
                httpServer->start(port);
            }

        } else {
            httpServer->start();
        }

        QLOG_INFO() << "Running on port" << httpServer->getPort();

        // Update libraries to new versions
        LibrariesUpdater updater;
        updater.updateIfNeeded();

        YACReaderLocalServer *localServer = new YACReaderLocalServer();

        int ret = app.exec();

        QLOG_INFO() << "YACReaderLibrary closed with exit code :" << ret;

        // shutdown
        httpServer->stop();
        delete httpServer;
        localServer->close();
        delete localServer;
#ifdef Q_OS_WIN
        logger.shutDownLoggerThread();
#endif
        return ret;
    } else if (command == "create-library") {
        parser.clearPositionalArguments();
        parser.addPositionalArgument("create-library", "Creates a library named \"name\" in the specified destination <path>");
        parser.addPositionalArgument("name", "Library name", "\"name\"");
        parser.addPositionalArgument("path", "Path to the folder where the library will be created", "<path>");
        parser.process(app);

        const QStringList args = parser.positionalArguments();
        if (args.length() != 3) {
            parser.showHelp();
            return 0;
        }

        ConsoleUILibraryCreator *libraryCreatorUI = new ConsoleUILibraryCreator(settings);
        libraryCreatorUI->createLibrary(args.at(1), args.at(2));

        return 0;
    } else if (command == "update-library") {
        parser.clearPositionalArguments();
        parser.addPositionalArgument("update-library", "Updates an existing library at <path>");
        parser.addPositionalArgument("path", "Path to the library to be updated", "<path>");
        parser.process(app);

        const QStringList args = parser.positionalArguments();
        if (args.length() != 2) {
            parser.showHelp();
            return 0;
        }

        ConsoleUILibraryCreator *libraryCreatorUI = new ConsoleUILibraryCreator(settings);
        libraryCreatorUI->updateLibrary(args.at(1));

        return 0;
    } else if (command == "add-library") {
        parser.clearPositionalArguments();
        parser.addPositionalArgument("add-library", "Adds an exiting library named \"name\" at the specified origin <path>");
        parser.addPositionalArgument("name", "Library name", "\"name\"");
        parser.addPositionalArgument("path", "Path to the folder where the library is", "<path>");
        parser.process(app);

        const QStringList args = parser.positionalArguments();
        if (args.length() != 3) {
            parser.showHelp();
            return 0;
        }

        ConsoleUILibraryCreator *libraryCreatorUI = new ConsoleUILibraryCreator(settings);
        libraryCreatorUI->addExistingLibrary(args.at(1), args.at(2));

        return 0;
    } else if (command == "remove-library") {
        parser.clearPositionalArguments();
        parser.addPositionalArgument("remove-library", "Removes a library named \"name\" from the list of libraries");
        parser.addPositionalArgument("name", "Library name", "\"name\"");
        parser.process(app);

        const QStringList args = parser.positionalArguments();
        if (args.length() != 2) {
            parser.showHelp();
            return 0;
        }

        ConsoleUILibraryCreator *libraryCreatorUI = new ConsoleUILibraryCreator(settings);
        libraryCreatorUI->removeLibrary(args.at(1));

        return 0;
    } else if (command == "list-libraries") {
        parser.clearPositionalArguments();
        parser.addPositionalArgument("list-libraries", "List all available libraries");
        parser.process(app);

        YACReaderLibraries libraries = DBHelper::getLibraries();
        for (QString libraryName : libraries.getNames())
            qout << libraryName << " : " << libraries.getPath(libraryName) << Qt::endl;

        return 0;
    } else if (command == "set-port") {
        parser.clearPositionalArguments();
        parser.addPositionalArgument("set-port", "Set server port (persistent).");
        parser.addPositionalArgument("port", "1-65535", "<port>");
        parser.process(app);

        const QStringList args = parser.positionalArguments();
        if (args.length() != 2) {
            parser.showHelp();
            return 0;
        }

        bool valid;
        qint32 port = args.at(1).toInt(&valid);
        if (!valid || port < 1 || port > 65535) {
            qout << "Invalid server port";
            parser.showHelp();
            return 0;
        }

        QSettings *settings = new QSettings(YACReader::getSettingsPath() + "/" + QCoreApplication::applicationName() + ".ini", QSettings::IniFormat);
        settings->setValue("listener/port", QString::number(port));
        delete settings;
        return 0;

    } else // error
    {
        parser.process(app);
        parser.showHelp();
        return 0;
    }
}