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#include "translator.h"
#include "translatortools.h"
#include "profileevaluator.h"

#include <QtCore/QCoreApplication>
#include <QtCore/QDebug>
#include <QtCore/QDir>
#include <QtCore/QFile>
#include <QtCore/QFileInfo>
#include <QtCore/QString>
#include <QtCore/QStringList>
#include <QtCore/QTextCodec>

static QString m_defaultExtensions;

static void printOut(const QString & out)
{
    qWarning("%s", qPrintable(out));
}

static void recursiveFileInfoList(const QDir &dir,
    const QStringList &nameFilters, QDir::Filters filter, bool recursive,
    QFileInfoList *fileinfolist)
{
    if (recursive)
        filter |= QDir::AllDirs;
    QFileInfoList entries = dir.entryInfoList(nameFilters, filter);

    QFileInfoList::iterator it;
    for (it = entries.begin(); it != entries.end(); ++it) {
        QString fname = it->fileName();
        if (fname != QLatin1String(".") && fname != QLatin1String("..")) {
            if (it->isDir())
                recursiveFileInfoList(QDir(it->absoluteFilePath()), nameFilters, filter, recursive, fileinfolist);
            else 
                fileinfolist->append(*it);
        }
    }
}

static void printUsage()
{
    printOut(QObject::tr(
        "Usage:\n"
        "    lupdate [options] [project-file]\n"
        "    lupdate [options] [source-file|path]... -ts ts-files\n\n"
        "lupdate is part of Qt's Linguist tool chain. It can be used as a\n"
        "stand-alone tool to create XML based translations files in the .ts\n"
        "format from translatable messages in C++ and Java source code.\n\n"
        "lupdate can also merge such messages into existing .ts files.\n\n"
        "Options:\n"
        "    -help  Display this information and exit.\n"
        "    -no-obsolete\n"
        "           Drop all obsolete strings.\n"
        "    -extensions <ext>[,<ext>]...\n"
        "           Process files with the given extensions only.\n"
        "           The extension list must be separated with commas, not with whitespace.\n"
        "           Default: '%1'.\n"
        "    -pluralonly\n"
        "           Only include plural form messages.\n"
        "    -silent\n"
        "           Do not explain what is being done.\n"
        "    -no-sort\n"
        "           Do not sort contexts in .ts files.\n"
        "    -no-recursive\n"
        "           Do not recursively scan the following directories.\n"
        "    -recursive\n"
        "           Recursively scan the following directories.\n"
        "    -locations {absolute|relative|none}\n"
        "           Specify/override how source code references are saved in ts files.\n"
        "           Default is absolute.\n"
        "    -no-ui-lines\n"
        "           Do not record line numbers in references to .ui files.\n"
        "    -disable-heuristic {sametext|similartext|number}\n"
        "           Disable the named merge heuristic. Can be specified multiple times.\n"
        "    -pro <filename>\n"
        "           Name of a .pro file. Useful for files with .pro\n"
        "           file syntax but different file suffix\n"
        "    -source-language <language>[_<region>]\n"
        "           Specify/override the language of the source strings. Defaults to\n"
        "           POSIX if not specified and the file does not name it yet.\n"
        "    -target-language <language>[_<region>]\n"
        "           Specify/override the language of the translation.\n"
        "           The target language is guessed from the file name if this option\n"
        "           is not specified and the file contents name no language yet.\n"
        "    -version\n"
        "           Display the version of lupdate and exit.\n"
    ).arg(m_defaultExtensions));
}

static void updateTsFiles(const Translator &fetchedTor, const QStringList &tsFileNames,
    const QByteArray &codecForTr, const QString &sourceLanguage, const QString &targetLanguage,
    UpdateOptions options, bool *fail)
{
    QDir dir;
    QString err;
    foreach (const QString &fileName, tsFileNames) {
        QString fn = dir.relativeFilePath(fileName);
        ConversionData cd;
        Translator tor;
        cd.m_sortContexts = !(options & NoSort);
        if (QFile(fileName).exists()) {
            if (!tor.load(fileName, cd, QLatin1String("auto"))) {
                printOut(cd.error());
                *fail = true;
                continue;
            }
            cd.clearErrors();
            if (!codecForTr.isEmpty() && codecForTr != tor.codecName())
                qWarning("lupdate warning: Codec for tr() '%s' disagrees with "
                         "existing file's codec '%s'. Expect trouble.",
                         codecForTr.constData(), tor.codecName().constData());
            if (!targetLanguage.isEmpty() && targetLanguage != tor.languageCode())
                qWarning("lupdate warning: Specified target language '%s' disagrees with "
                         "existing file's language '%s'. Ignoring.",
                         qPrintable(targetLanguage), qPrintable(tor.languageCode()));
            if (!sourceLanguage.isEmpty() && sourceLanguage != tor.sourceLanguageCode())
                qWarning("lupdate warning: Specified source language '%s' disagrees with "
                         "existing file's language '%s'. Ignoring.",
                         qPrintable(sourceLanguage), qPrintable(tor.sourceLanguageCode()));
        } else {
            if (!codecForTr.isEmpty())
                tor.setCodecName(codecForTr);
            if (!targetLanguage.isEmpty())
                tor.setLanguageCode(targetLanguage);
            if (!sourceLanguage.isEmpty())
                tor.setSourceLanguageCode(sourceLanguage);
        }
        tor.makeFileNamesAbsolute(QFileInfo(fileName).absoluteDir());
        if (options & NoLocations)
            tor.setLocationsType(Translator::NoLocations);
        else if (options & RelativeLocations)
            tor.setLocationsType(Translator::RelativeLocations);
        else if (options & AbsoluteLocations)
            tor.setLocationsType(Translator::AbsoluteLocations);
        if (options & Verbose)
            printOut(QObject::tr("Updating '%1'...\n").arg(fn));

        if (tor.locationsType() == Translator::NoLocations) // Could be set from file
            options |= NoLocations;
        Translator out = merge(tor, fetchedTor, options, err);
        if (!codecForTr.isEmpty())
            out.setCodecName(codecForTr);

        if ((options & Verbose) && !err.isEmpty()) {
            printOut(err);
            err.clear();
        }
        if (options & PluralOnly) {
            if (options & Verbose)
                printOut(QObject::tr("Stripping non plural forms in '%1'...\n").arg(fn));
            out.stripNonPluralForms();
        }
        if (options & NoObsolete)
            out.stripObsoleteMessages();
        out.stripEmptyContexts();

        if (!out.save(fileName, cd, QLatin1String("auto"))) {
            printOut(cd.error());
            *fail = true;
        }
    }
}

int main(int argc, char **argv)
{
    QCoreApplication app(argc, argv);
    m_defaultExtensions = QLatin1String("ui,c,c++,cc,cpp,cxx,ch,h,h++,hh,hpp,hxx");

    QStringList args = app.arguments();
    QString defaultContext; // This was QLatin1String("@default") before.
    Translator fetchedTor;
    QByteArray codecForTr;
    QByteArray codecForSource;
    QStringList tsFileNames;
    QStringList proFiles;
    QStringList sourceFiles;
    QString targetLanguage;
    QString sourceLanguage;

    UpdateOptions options =
        Verbose | // verbose is on by default starting with Qt 4.2
        HeuristicSameText | HeuristicSimilarText | HeuristicNumber;
    int numFiles = 0;
    bool standardSyntax = true;
    bool metTsFlag = false;
    bool recursiveScan = true;

    QString extensions = m_defaultExtensions;
    QStringList extensionsNameFilters;

    for (int  i = 1; i < argc; ++i) {
        if (args.at(i) == QLatin1String("-ts"))
            standardSyntax = false;
    }

    for (int i = 1; i < argc; ++i) {
        QString arg = args.at(i);
        if (arg == QLatin1String("-help")
                || arg == QLatin1String("--help")
                || arg == QLatin1String("-h")) {
            printUsage();
            return 0;
        } else if (arg == QLatin1String("-pluralonly")) {
            options |= PluralOnly;
            continue;
        } else if (arg == QLatin1String("-noobsolete")
                || arg == QLatin1String("-no-obsolete")) {
            options |= NoObsolete;
            continue;
        } else if (arg == QLatin1String("-silent")) {
            options &= ~Verbose;
            continue;
        } else if (arg == QLatin1String("-target-language")) {
            ++i;
            if (i == argc) {
                qWarning("The option -target-language requires a parameter.");
                return 1;
            }
            targetLanguage = args[i];
            continue;
        } else if (arg == QLatin1String("-source-language")) {
            ++i;
            if (i == argc) {
                qWarning("The option -source-language requires a parameter.");
                return 1;
            }
            sourceLanguage = args[i];
            continue;
        } else if (arg == QLatin1String("-disable-heuristic")) {
            ++i;
            if (i == argc) {
                qWarning("The option -disable-heuristic requires a parameter.");
                return 1;
            }
            arg = args[i];
            if (arg == QLatin1String("sametext")) {
                options &= ~HeuristicSameText;
            } else if (arg == QLatin1String("similartext")) {
                options &= ~HeuristicSimilarText;
            } else if (arg == QLatin1String("number")) {
                options &= ~HeuristicNumber;
            } else {
                qWarning("Invalid heuristic name passed to -disable-heuristic.");
                return 1;
            }
            continue;
        } else if (arg == QLatin1String("-locations")) {
            ++i;
            if (i == argc) {
                qWarning("The option -locations requires a parameter.");
                return 1;
            }
            if (args[i] == QLatin1String("none")) {
                options |= NoLocations;
            } else if (args[i] == QLatin1String("relative")) {
                options |= RelativeLocations;
            } else if (args[i] == QLatin1String("absolute")) {
                options |= AbsoluteLocations;
            } else {
                qWarning("Invalid parameter passed to -locations.");
                return 1;
            }
            continue;
        } else if (arg == QLatin1String("-no-ui-lines")) {
            options |= NoUiLines;
            continue;
        } else if (arg == QLatin1String("-verbose")) {
            options |= Verbose;
            continue;
        } else if (arg == QLatin1String("-no-recursive")) {
            recursiveScan = false;
            continue;
        } else if (arg == QLatin1String("-recursive")) {
            recursiveScan = true;
            continue;
        } else if (arg == QLatin1String("-no-sort")
                   || arg == QLatin1String("-nosort")) {
            options |= NoSort;
            continue;
        } else if (arg == QLatin1String("-version")) {
            printOut(QObject::tr("lupdate version %1\n").arg(QLatin1String(QT_VERSION_STR)));
            return 0;
        } else if (arg == QLatin1String("-ts")) {
            metTsFlag = true;
            continue;
        } else if (arg == QLatin1String("-extensions")) {
            ++i;
            if (i == argc) {
                qWarning("The -extensions option should be followed by an extension list.");
                return 1;
            }
            extensions = args[i];
            continue;
        } else if (arg == QLatin1String("-pro")) {
            ++i;
            if (i == argc) {
                qWarning("The -pro option should be followed by a filename of .pro file.");
                return 1;
            }
            proFiles += args[i];
            numFiles++;
            continue;
        } else if (arg.startsWith(QLatin1String("-")) && arg != QLatin1String("-")) {
            qWarning("Unrecognized option '%s'", qPrintable(arg));
            return 1;
        }

        numFiles++;

        QString fullText;

        codecForTr.clear();
        codecForSource.clear();

        if (metTsFlag) {
            bool found = false;
            foreach (const Translator::FileFormat &fmt, Translator::registeredFileFormats()) {
                if (arg.endsWith(QLatin1Char('.') + fmt.extension, Qt::CaseInsensitive)) {
                    QFileInfo fi(arg);
                    if (!fi.exists() || fi.isWritable()) {
                        tsFileNames.append(QFileInfo(arg).absoluteFilePath());
                    } else {
                        qWarning("lupdate warning: For some reason, '%s' is not writable.\n",
                                qPrintable(arg));
                    }
                    found = true;
                    break;
                }
            }
            if (!found) {
                qWarning("lupdate error: File '%s' has no recognized extension\n",
                         qPrintable(arg));
                return 1;
            }
        } else if (arg.endsWith(QLatin1String(".pro"), Qt::CaseInsensitive)
                || arg.endsWith(QLatin1String(".pri"), Qt::CaseInsensitive)) {
            proFiles << arg;
        } else {
            QFileInfo fi(arg);
            if (!fi.exists()) {
                qWarning("lupdate error: File '%s' does not exists\n", qPrintable(arg));
                return 1;
            } else if (fi.isDir()) {
                if (options & Verbose)
                    printOut(QObject::tr("Scanning directory '%1'...").arg(arg));
                QDir dir = QDir(fi.filePath());
                if (extensionsNameFilters.isEmpty()) {
                    extensions = extensions.trimmed();
                    // Remove the potential dot in front of each extension
                    if (extensions.startsWith(QLatin1Char('.')))
                        extensions.remove(0,1);
                    extensions.replace(QLatin1String(",."), QLatin1String(","));

                    extensions.insert(0, QLatin1String("*."));
                    extensions.replace(QLatin1Char(','), QLatin1String(",*."));
                    extensionsNameFilters = extensions.split(QLatin1Char(','));
                }
                QDir::Filters filters = QDir::Files | QDir::NoSymLinks;
                QFileInfoList fileinfolist;
                recursiveFileInfoList(dir, extensionsNameFilters, filters,
                    recursiveScan, &fileinfolist);
                QFileInfoList::iterator ii;
                QString fn;
                for (ii = fileinfolist.begin(); ii != fileinfolist.end(); ++ii) {
                    // Make sure the path separator is stored with '/' in the ts file
                    sourceFiles << ii->canonicalFilePath().replace(QLatin1Char('\\'), QLatin1Char('/'));
                }
            } else {
                sourceFiles << fi.canonicalFilePath().replace(QLatin1Char('\\'), QLatin1Char('/'));
            }
        }
    } // for args


    bool firstPass = true;
    bool fail = false;
    while (firstPass || !proFiles.isEmpty()) {
        ConversionData cd;
        cd.m_defaultContext = defaultContext;
        cd.m_noUiLines = options & NoUiLines;

        QStringList tsFiles = tsFileNames;
        if (proFiles.count() > 0) {
            QFileInfo pfi(proFiles.takeFirst());
            QHash<QByteArray, QStringList> variables;

            ProFileEvaluator visitor;
            visitor.setVerbose(options & Verbose);

            ProFile pro(pfi.absoluteFilePath());
            if (!visitor.queryProFile(&pro))
                return 2;
            if (!visitor.accept(&pro))
                return 2;

            if (visitor.templateType() == ProFileEvaluator::TT_Subdirs) {
                QDir proDir(pfi.absoluteDir());
                foreach (const QString &subdir, visitor.values(QLatin1String("SUBDIRS"))) {
                    QString subPro = QDir::cleanPath(proDir.absoluteFilePath(subdir));
                    QFileInfo subInfo(subPro);
                    if (subInfo.isDir())
                        proFiles << (subPro + QLatin1Char('/')
                                     + subInfo.fileName() + QLatin1String(".pro"));
                    else
                        proFiles << subPro;
                }
                continue;
            }

            evaluateProFile(visitor, &variables);

            sourceFiles = variables.value("SOURCES");

            QStringList tmp = variables.value("CODECFORTR");
            if (!tmp.isEmpty() && !tmp.first().isEmpty()) {
                codecForTr = tmp.first().toLatin1();
                fetchedTor.setCodecName(codecForTr);
            }
            tmp = variables.value("CODECFORSRC");
            if (!tmp.isEmpty() && !tmp.first().isEmpty()) {
                codecForSource = tmp.first().toLatin1();
                if (!QTextCodec::codecForName(codecForSource))
                    qWarning("lupdate warning: Codec for source '%s' is invalid. Falling back to codec for tr().",
                             codecForSource.constData());
                else
                    cd.m_codecForSource = codecForSource;
            }

            tsFiles += variables.value("TRANSLATIONS");
        }

        for (QStringList::iterator it = sourceFiles.begin(); it != sourceFiles.end(); ++it) {
            if (it->endsWith(QLatin1String(".java"), Qt::CaseInsensitive)) {
                cd.m_sourceFileName = *it;
                fetchedTor.load(*it, cd, QLatin1String("java"));
                //fetchtr_java(*it, &fetchedTor, defaultContext, true, codecForSource);
            }
            else if (it->endsWith(QLatin1String(".ui"), Qt::CaseInsensitive)) {
                fetchedTor.load(*it, cd, QLatin1String("ui"));
                //fetchedTor.load(*it + QLatin1String(".h"), cd, QLatin1String("cpp"));
                //fetchtr_ui(*it, &fetchedTor, defaultContext, true);
                //fetchtr_cpp(*it + QLatin1String(".h"), &fetchedTor,
                //             defaultContext, false, codecForSource);
            }
            else if (it->endsWith(QLatin1String(".js"), Qt::CaseInsensitive)
                || it->endsWith(QLatin1String(".qs"), Qt::CaseInsensitive)) {
                fetchedTor.load(*it, cd, QLatin1String("js"));
            } else {
                fetchedTor.load(*it, cd, QLatin1String("cpp"));
                //fetchtr_cpp(*it, &fetchedTor, defaultContext, true, codecForSource);
            }
        }
        if (!cd.error().isEmpty())
            printOut(cd.error());

        tsFiles.sort();
        tsFiles.removeDuplicates();

        if (!tsFiles.isEmpty())
            updateTsFiles(fetchedTor, tsFiles, codecForTr, sourceLanguage, targetLanguage, options, &fail);

        firstPass = false;
    }

    if (numFiles == 0) {
        printUsage();
        return 1;
    }

    return fail ? 1 : 0;
}