// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0

#include "reporthandler.h"
#include "typedatabase.h"
#include "messages.h"

#include <QtCore/qelapsedtimer.h>
#include <QtCore/qfile.h>
#include <QtCore/qoperatingsystemversion.h>
#include <QtCore/qset.h>

#include <cstring>
#include <cstdarg>
#include <cstdio>

using namespace Qt::StringLiterals;

static const auto COLOR_END = "\033[0m"_ba;
static const auto COLOR_YELLOW = "\033[1;33m"_ba;
static const auto COLOR_GREEN = "\033[0;32m"_ba;

static constexpr bool useTerminalColors()
{
    return QOperatingSystemVersion::currentType() != QOperatingSystemVersion::Windows
#ifdef NOCOLOR
        && false
#endif
        ;
}

static bool m_silent = false;
static int m_warningCount = 0;
static int m_suppressedCount = 0;
static ReportHandler::DebugLevel m_debugLevel = ReportHandler::NoDebug;
static QSet<QString> m_reportedWarnings;
static QString m_prefix;
static bool m_withinProgress = false;
static QByteArray m_progressMessage;
static int m_step_warning = 0;
static QElapsedTimer m_timer;

Q_LOGGING_CATEGORY(lcShiboken, "qt.shiboken")
Q_LOGGING_CATEGORY(lcShibokenDoc, "qt.shiboken.doc")

void ReportHandler::install()
{
    qInstallMessageHandler(ReportHandler::messageOutput);
    startTimer();
}

void ReportHandler::startTimer()
{
    m_timer.start();
}

ReportHandler::DebugLevel ReportHandler::debugLevel()
{
    return m_debugLevel;
}

void ReportHandler::setDebugLevel(ReportHandler::DebugLevel level)
{
    m_debugLevel = level;
}

bool ReportHandler::setDebugLevelFromArg(const QString &level)
{
    bool result = true;
    if (level == u"sparse")
        ReportHandler::setDebugLevel(ReportHandler::SparseDebug);
    else if (level == u"medium")
        ReportHandler::setDebugLevel(ReportHandler::MediumDebug);
    else if (level == u"full")
        ReportHandler::setDebugLevel(ReportHandler::FullDebug);
    else
        result = false;
    return result;
}

int ReportHandler::suppressedCount()
{
    return m_suppressedCount;
}

int ReportHandler::warningCount()
{
    return m_warningCount;
}

bool ReportHandler::isSilent()
{
    return m_silent;
}

void ReportHandler::setSilent(bool silent)
{
    m_silent = silent;
}

void ReportHandler::setPrefix(const QString &p)
{
    m_prefix = p;
}

void ReportHandler::messageOutput(QtMsgType type, const QMessageLogContext &context, const QString &text)
{
    // Check for file location separator added by SourceLocation
    auto fileLocationPos = text.indexOf(u":\t");
    if (type == QtWarningMsg) {
        if (m_silent || m_reportedWarnings.contains(text))
            return;
        if (auto *db = TypeDatabase::instance()) {
            const bool suppressed = fileLocationPos >= 0
                ? db->isSuppressedWarning(QStringView{text}.mid(fileLocationPos + 2))
                : db->isSuppressedWarning(text);
            if (suppressed) {
                ++m_suppressedCount;
                return;
            }
        }
        ++m_warningCount;
        ++m_step_warning;
        m_reportedWarnings.insert(text);
    }
    QString message = m_prefix;
    if (!message.isEmpty())
        message.append(u' ');
    const auto prefixLength = message.size();
    message.append(text);
    // Replace file location tab by space
    if (fileLocationPos >= 0)
        message[prefixLength + fileLocationPos + 1] = u' ';
    fprintf(stderr, "%s\n", qPrintable(qFormatLogMessage(type, context, message)));
}

static QByteArray timeStamp()
{
    const qint64 elapsed = m_timer.elapsed();
    return elapsed > 5000
        ? QByteArray::number(elapsed / 1000) + 's'
        : QByteArray::number(elapsed) + "ms";
}

void ReportHandler::startProgress(const QByteArray& str)
{
    if (m_silent)
        return;

    if (m_withinProgress)
        endProgress();

    m_withinProgress = true;
    m_progressMessage = str;
}

static void indentStdout(qsizetype n)
{
    for (qsizetype i = 0; i < n; ++i)
        fputc(' ', stdout);
}

void ReportHandler::endProgress()
{
    if (m_silent)
        return;

    m_withinProgress = false;

    std::fputs(m_prefix.toUtf8().constData(), stdout);
    const auto ts = timeStamp();
    if (ts.size() < 6)
        indentStdout(6 - ts.size());
    std::fputs(" [", stdout);
    std::fputs(ts.constData(), stdout);
    std::fputs("] ", stdout);
    std::fputs(m_progressMessage.constData(), stdout);
    if (m_progressMessage.size() < 60)
        indentStdout(60 - m_progressMessage.size());
    static const QByteArray ok = '['
        + (useTerminalColors() ? COLOR_GREEN + "OK"_ba + COLOR_END : "OK"_ba)
        + "]\n"_ba;
    static const QByteArray warning = '['
        + (useTerminalColors() ? COLOR_YELLOW + "WARNING"_ba + COLOR_END : "WARNING"_ba)
        + "]\n"_ba;
    std::fputs(m_step_warning == 0 ? ok.constData() : warning.constData(), stdout);
    std::fflush(stdout);
    m_progressMessage.clear();
    m_step_warning = 0;
}

QByteArray ReportHandler::doneMessage()
{
    QByteArray result = "Done, " + m_prefix.toUtf8() + ' ' + timeStamp();
    if (m_warningCount)
        result += ", " + QByteArray::number(m_warningCount) + " warnings";
    if (m_suppressedCount)
        result += " (" + QByteArray::number(m_suppressedCount) + " known issues)";
    return  result;
}

static QStringList generalMessages;

void ReportHandler::addGeneralMessage(const QString &message)
{
    generalMessages.append(message);
}

static const char generalLogFile[] = "mjb_shiboken.log";

void ReportHandler::writeGeneralLogFile(const QString &directory)
{
    if (generalMessages.isEmpty())
        return;
    QFile file(directory + u'/' + QLatin1StringView(generalLogFile));
    if (!file.open(QIODevice::WriteOnly | QIODevice::Text)) {
        qWarning(lcShiboken, "%s", qPrintable(msgCannotOpenForWriting(file)));
        return;
    }
    for (const auto &m : std::as_const(generalMessages)) {
        file.write(m.toUtf8());
        file.putChar('\n');
    }
}

void ReportHandler::dumpGeneralLogFile()
{
    std::fprintf(stdout, "\n--- %s  ---\n", generalLogFile);
    for (const auto &m : std::as_const(generalMessages)) {
        std::fputs(m.toUtf8().constData(), stdout);
        std::fputc('\n', stdout);
    }
    std::fprintf(stdout, "--- End of %s ---\n\n", generalLogFile);
}