#include <QtGlobal>
#include <QCoreApplication>
#include <QByteArray>


#include <QProcess>
#include <QCommandLineParser>
#include <QStandardPaths>
#include <QSettings>
#include <QDir>
#include <QDebug>

#include "message_handler.h"
#include "commandline_parser.h"
#include "utils.h"
#include "update.h"
#include "System.h"

#include <DeviceController/interfaces.h>


//#include <unistd.h>
//#include <errno.h>

#ifdef PTU5
#define SERIAL_PORT "ttymxc2"
#else
#define SERIAL_PORT "ttyUSB0"
#endif

int read1stLineOfFile(QString fileName) {
    QFile f(fileName);
    if (f.exists()) {
        if (f.open(QIODevice::ReadOnly | QIODevice::Text)) {
            QTextStream in(&f);
            in.setCodec("UTF-8");
            while(!in.atEnd()) {
                return in.readLine().toInt();
            }
        }
    }
    return -1;
}

int main(int argc, char **argv) {
    QByteArray const value = qgetenv("LC_ALL");
    if (value != "C") {
        qputenv("LC_ALL", "C");
    }
    // qputenv("XDG_RUNTIME_DIR", "/var/run/user/0");

    openlog("ATB-DL-JSON", LOG_PERROR | LOG_PID | LOG_CONS, LOG_USER);

    QCoreApplication a(argc, argv);
    QCoreApplication::setApplicationName("ATBDownloadDCJsonFiles");
    QCoreApplication::setApplicationVersion(APP_VERSION);

    if (!messageHandlerInstalled()) { // change internal qt-QDebug-handling
        atbInstallMessageHandler(atbDebugOutput);
        setDebugLevel(LOG_NOTICE);
    }

    CommandLineParser parser;
    parser.process(a);
    parser.readSettings();

    QString repositoryUrl = parser.repositoryUrl();
    QString plugInDir = parser.plugInDir();
    QString plugInName = parser.plugInName();
    QString workingDir = parser.workingDir();
    QString psaConfigDir = parser.psaConfigDir();
    QString psaTariffDir = parser.psaTariffDir();
    QString iniFileName = parser.iniFileName();
    bool const dryRun = parser.dryRun();
    bool const noUpdatePsaHardware = parser.noUpdatePsaHardware();
    bool const showYoctoVersion = parser.yoctoVersion();
    bool const showYoctoInstallStatus = parser.yoctoInstallStatus();
    bool const showExtendedVersion = parser.extendedVersion();
    bool const alwaysDownloadConfig = parser.alwaysDownloadConfig();
    bool const alwaysDownloadDC = parser.alwaysDownloadDC();

    QString const rtPath = QCoreApplication::applicationDirPath();

    int const machineNr = read1stLineOfFile("/mnt/system_data/machine_nr");
    int const customerNr = read1stLineOfFile("/mnt/system_data/cust_nr");
    int const zoneNr = read1stLineOfFile("/mnt/system_data/zone_nr");
    QString const branchName = (zoneNr != 0)
            ? QString("zg1/zone%1").arg(zoneNr) : "master";

    qInfo() << "pwd ......................" << rtPath;
    qInfo() << "repositoryUrl ............" << repositoryUrl;
    qInfo() << "plugInDir ................" << plugInDir;
    qInfo() << "plugInName ..............." << plugInName;
    qInfo() << "workingDir ..............." << workingDir;
    qInfo() << "psaConfigDir ............." << psaConfigDir;
    qInfo() << "psaTariffDir ............." << psaTariffDir;
    qInfo() << "dryRun ..................." << dryRun;
    qInfo() << "noUpdatePsaHardware ......" << noUpdatePsaHardware;
    qInfo() << "alwaysDownloadConfig ....." << alwaysDownloadConfig;
    qInfo() << "alwaysDownloadDC ........." << alwaysDownloadDC;
    qInfo() << "showYoctoVersion ........." << showYoctoVersion;
    qInfo() << "showYoctoInstallStatus ..." << showYoctoInstallStatus;
    qInfo() << "showExtendedVersion ......" << showExtendedVersion;
    qInfo() << "iniFileName .............." << iniFileName;
    qInfo() << "extended-version ........." << APP_EXTENDED_VERSION;
    qInfo() << "machineNr ................" << machineNr;
    qInfo() << "customerNr ..............." << customerNr;
    qInfo() << "zoneNr ..................." << zoneNr;

    if (showExtendedVersion) {
        printf(APP_EXTENDED_VERSION"\n");
        return 0;
    }

    QString const &customerRepo = QDir::cleanPath(workingDir + QDir::separator() + QString("customer_%1").arg(customerNr));
    QStringList filesToUpdate;

    // etc/psa_config: located under mount-path
    std::optional<QString> mountPath = System::checkForUSBStick(psaConfigDir);
    if (mountPath.has_value()) {
        filesToUpdate = System::getJsonFilesOnUsbStick(mountPath.value());
    } else {
        qCritical() << "Using customer repository" << customerRepo;

        QDir dir(QDir::cleanPath(customerRepo + QDir::separator() + "etc/psa_config"));
        if (dir.exists()) {
            QStringList jsons = dir.entryList(QStringList() << "DC2C*.json", QDir::Files);
            if (!jsons.isEmpty()) {
                for (QStringList::size_type i=0; i<jsons.size(); ++i) {
                    filesToUpdate << QDir::cleanPath(QString("etc/psa_config/") + jsons.at(i));
                }
            }
        } else {
            qCritical() << "DIRECTORY" << dir << "DOES NOT EXIST";
            return -1;
        }
    }

    // qCritical() << "JSON FILES TO UPDATE" << filesToUpdate;

    Update update(customerRepo,
                  QString::number(customerNr),
                  branchName,
                  plugInDir,
                  plugInName,
                  workingDir);

    update.doUpdate(filesToUpdate, mountPath.has_value());
    update.checkJsonVersions();
    //update.checkJsonVersions(filesToUpdate);

    if (mountPath.has_value()) {
        System::umountUSBStick();
    }

    return 0;
}