#include "logger.h"

#include <QFile>
#include <QTextStream>
#include "configmgr.h"

using namespace vnotex;

QFile Logger::s_file;

bool Logger::s_debugLog = false;

void Logger::init(bool p_debugLog)
{
    s_debugLog = p_debugLog;

#if defined(QT_NO_DEBUG)
    s_file.setFileName(ConfigMgr::getInst().getLogFile());
    if (s_file.size() >= 5 * 1024 * 1024) {
        s_file.open(QIODevice::WriteOnly | QIODevice::Text);
    } else {
        s_file.open(QIODevice::Append | QIODevice::Text);
    }
#endif

    qInstallMessageHandler(Logger::log);
}

static QString getFileName(const char *p_file)
{
    QString file(p_file);
    int idx = file.lastIndexOf(QChar('/'));
    if (idx == -1) {
        idx = file.lastIndexOf(QChar('\\'));
    }

    if (idx == -1) {
        return file;
    } else {
        return file.mid(idx + 1);
    }
}

void Logger::log(QtMsgType p_type, const QMessageLogContext &p_context, const QString &p_msg)
{
#if defined(QT_NO_DEBUG)
    if (!s_debugLog && p_type == QtDebugMsg) {
        return;
    }
#endif

    QByteArray localMsg = p_msg.toUtf8();
    QString header;

    switch (p_type) {
    case QtDebugMsg:
        header = QStringLiteral("Debug:");
        break;

    case QtInfoMsg:
        header = QStringLiteral("Info:");
        break;

    case QtWarningMsg:
        header = QStringLiteral("Warning:");
        break;

    case QtCriticalMsg:
        header = QStringLiteral("Critical:");
        break;

    case QtFatalMsg:
        header = QStringLiteral("Fatal:");
    }

    QString fileName = getFileName(p_context.file);

#if defined(QT_NO_DEBUG)
    QTextStream stream(&s_file);
    stream << header << (QString("(%1:%2) ").arg(fileName).arg(p_context.line))
           << localMsg << "\n";

    if (p_type == QtFatalMsg) {
        s_file.close();
        abort();
    }
#else
    std::string fileStr = fileName.toStdString();
    const char *file = fileStr.c_str();

    switch (p_type) {
    case QtDebugMsg:
        fprintf(stderr, "%s(%s:%u) %s\n",
                header.toStdString().c_str(), file, p_context.line, localMsg.constData());
        break;
    case QtInfoMsg:
        fprintf(stderr, "%s(%s:%u) %s\n",
                header.toStdString().c_str(), file, p_context.line, localMsg.constData());
        break;
    case QtWarningMsg:
        fprintf(stderr, "%s(%s:%u) %s\n",
                header.toStdString().c_str(), file, p_context.line, localMsg.constData());
        break;
    case QtCriticalMsg:
        fprintf(stderr, "%s(%s:%u) %s\n",
                header.toStdString().c_str(), file, p_context.line, localMsg.constData());
        break;
    case QtFatalMsg:
        fprintf(stderr, "%s(%s:%u) %s\n",
                header.toStdString().c_str(), file, p_context.line, localMsg.constData());
        abort();
    }

    fflush(stderr);
#endif
}