/****************************************************************************
**
** Copyright (C) 2016 Klaralvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Sergio Martins <sergio.martins@kdab.com>
** Contact: https://www.qt.io/licensing/
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include <QDebug>
#include <QFile>
#include <QFileInfo>
#if QT_CONFIG(commandlineparser)
#include <QCommandLineParser>
#endif
#include <QCoreApplication>

#include <private/qv4value_p.h>
#include <private/qqmljslexer_p.h>
#include <private/qqmljsparser_p.h>
#include <private/qqmljsengine_p.h>

static bool lint_file(const QString &filename, bool silent)
{
    QFile file(filename);
    if (!file.open(QFile::ReadOnly)) {
        qWarning() << "Failed to open file" << filename << file.error();
        return false;
    }

    QString code = QString::fromUtf8(file.readAll());
    file.close();

    QQmlJS::Engine engine;
    QQmlJS::Lexer lexer(&engine);

    QFileInfo info(filename);
    bool isJavaScript = info.suffix().toLower() == QLatin1String("js");
    lexer.setCode(code, /*line = */ 1, /*qmlMode=*/ !isJavaScript);
    QQmlJS::Parser parser(&engine);

    bool success = isJavaScript ? parser.parseProgram() : parser.parse();

    if (!success && !silent) {
        const auto diagnosticMessages = parser.diagnosticMessages();
        for (const QQmlJS::DiagnosticMessage &m : diagnosticMessages) {
            qWarning("%s:%d : %s", qPrintable(filename), m.loc.startLine, qPrintable(m.message));
        }
    }

    return success;
}

int main(int argv, char *argc[])
{
    QCoreApplication app(argv, argc);
    QCoreApplication::setApplicationName("qmllint");
    QCoreApplication::setApplicationVersion("1.0");
#if QT_CONFIG(commandlineparser)
    QCommandLineParser parser;
    parser.setApplicationDescription(QLatin1String("QML syntax verifier"));
    parser.addHelpOption();
    parser.addVersionOption();
    QCommandLineOption silentOption(QStringList() << "s" << "silent", QLatin1String("Don't output syntax errors"));
    parser.addOption(silentOption);
    parser.addPositionalArgument(QLatin1String("files"), QLatin1String("list of qml or js files to verify"));

    parser.process(app);

    const auto positionalArguments = parser.positionalArguments();
    if (positionalArguments.isEmpty()) {
        parser.showHelp(-1);
    }

    bool silent = parser.isSet(silentOption);
#else
    bool silent = false;
#endif
    bool success = true;
#if QT_CONFIG(commandlineparser)
    for (const QString &filename : positionalArguments)
#else
    const auto arguments = app.arguments();
    for (const QString &filename : arguments)
#endif
        success &= lint_file(filename, silent);

    return success ? 0 : -1;
}