#include "command.h"

#include <QProcess>
#include <QDebug>
#include <QDir>
#include <QRegularExpression>
#include <QDateTime>

Command::Command(QString command, QStringList args, QString workingDirectory,
                 bool verbose, int start_timeout, int finish_timeout)
    : m_command(command.trimmed())
    , m_commandResult("")
    , m_waitForStartTimeout(start_timeout)
    , m_waitForFinishTimeout(finish_timeout)
    , m_verbose(verbose)
    , m_exitCode(-1)
    , m_workingDirectory(workingDirectory)
    , m_args(args) {
    m_p.reset(new QProcess(this));
    if (m_p) {
        m_p->setWorkingDirectory(workingDirectory);
        m_p->setProcessChannelMode(QProcess::MergedChannels);

        connect(m_p.get(), SIGNAL(readyReadStandardOutput()), this, SLOT(readyReadStandardOutput()));
        connect(m_p.get(), SIGNAL(readyReadStandardError()), this, SLOT(readyReadStandardError()));
    }
}

void Command::readyReadStandardOutput() {
    QProcess *p = (QProcess *)sender();
    if (p) {
        QString s = p->readAllStandardOutput();
        if (m_verbose) {
//            qCritical().noquote() << s;
            m_commandResult += s;
        }
    }
}

void Command::readyReadStandardError() {
    QProcess *p = (QProcess *)sender();
    if (p) {
        QString s = p->readAllStandardError();
//        qCritical().noquote() << s;
        m_commandResult += s;
    }
}


QString Command::getCommandResult(bool reset) {
    if (reset == false) {
        return m_commandResult;
    }

    QString commandResult = m_commandResult;
    m_commandResult.clear();

    return commandResult;
}

bool Command::exec() {

    if (!m_args.isEmpty()) {
        m_p->start(m_command, m_args);
    } else {
        m_p->start(m_command);
    }

    qint64 const start = QDateTime::currentDateTime().toMSecsSinceEpoch();

    bool started = false;
    if ((started = m_p->waitForStarted(m_waitForStartTimeout)) == true) {
        // qCritical() << "PROCESS" << m_command << "STARTED IN" << m_p->workingDirectory();
        if (m_p->state() == QProcess::ProcessState::Running) {
            // qDebug() << "PROCESS" << m_command << "RUNNING IN" << p->workingDirectory();
            // wait forever for git/opkg-commands to finish
            int wait = m_waitForFinishTimeout;
            if (m_command.trimmed().startsWith("git", Qt::CaseInsensitive) ||
                m_command.trimmed().startsWith("opkg", Qt::CaseInsensitive)) {
                wait = -1;
            }
            bool const no_timeout = m_p->waitForFinished(wait);
            if (no_timeout) {
                // qDebug() << "PROCESS" << m_command << "FINISHED IN" << p->workingDirectory();
                if (m_p->exitStatus() == QProcess::NormalExit) {
                    if ((m_exitCode = m_p->exitCode()) == 0) {
                        qCritical().noquote() << m_p->readAllStandardOutput();
                        //qint64 const end = QDateTime::currentDateTime().toMSecsSinceEpoch();
                        //qDebug() << "EXECUTED" << m_command
                        //         << QString("(runtime %1ms)").arg(end-start)
                        //         << "with code" << m_exitCode
                        //         << "IN" << m_p->workingDirectory();
                        return true;
                    } else {
                        qint64 const end = QDateTime::currentDateTime().toMSecsSinceEpoch();
                        qCritical() << "EXECUTED" << m_command
                                    << QString("(runtime %1ms)").arg(end-start)
                                    << "with code" << m_exitCode
                                    << "IN" << m_p->workingDirectory();
                    }
                } else {
                    qint64 const end = QDateTime::currentDateTime().toMSecsSinceEpoch();
                    qCritical() << "PROCESS" << m_command << "CRASHED with code"
                                << m_p->exitCode()
                                << QString("(after %1ms)").arg(end-start)
                                << "IN" << m_p->workingDirectory();
                }
            } else {
                qint64 const end = QDateTime::currentDateTime().toMSecsSinceEpoch();
                qCritical() << "PROCESS" << m_command
                            << "DID NOT FINISH WITH" << wait
                            << "MS IN" << m_p->workingDirectory()
                            << QString("(runtime %1ms)").arg(end-start);
            }
        } else {
            qCritical() << "WRONG PROCESS STATE" << m_p->state()
                        << "IN" << m_p->workingDirectory();
        }
    } else {
        qint64 const end = QDateTime::currentDateTime().toMSecsSinceEpoch();
        qCritical() << "PROCESS" << m_command << "TIMEOUT AT START"
                    << QString("(runtime %1ms)").arg(end-start)
                    << "IN" << m_p->workingDirectory() << m_waitForStartTimeout;
    }

    return false;
}