// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0

#include "collectionconfigreader.h"

#include <QtGui/QGuiApplication>

class QCG {
    Q_DECLARE_TR_FUNCTIONS(QCollectionGenerator)
};

void CollectionConfigReader::raiseErrorWithLine()
{
    raiseError(QCG::tr("Unknown token at line %1.").arg(lineNumber()));
}

void CollectionConfigReader::readData(const QByteArray &contents)
{
    m_enableFilterFunctionality = true;
    m_hideFilterFunctionality = true;
    m_enableAddressBar = true;
    m_hideAddressBar = true;
    m_enableDocumentationManager = true;
    m_enableFullTextSearchFallback = false;

    addData(contents);
    while (!atEnd()) {
        readNext();
        if (isStartElement()) {
            if (name() == QLatin1String("QHelpCollectionProject")
                && attributes().value(QLatin1String("version")) == QLatin1String("1.0"))
                readConfig();
            else
                raiseError(QCG::tr("Unknown token at line %1. "
                                   "Expected \"QtHelpCollectionProject\".")
                           .arg(lineNumber()));
        }
    }
}

void CollectionConfigReader::readConfig()
{
    bool ok = false;
    while (!atEnd()) {
        readNext();
        if (isStartElement()) {
            if (name() == QLatin1String("assistant"))
                readAssistantSettings();
            else if (name() == QLatin1String("docFiles"))
                readDocFiles();
            else
                raiseErrorWithLine();
        } else if (isEndElement() && name() == QLatin1String("QHelpCollectionProject")) {
            ok = true;
        }
    }
    if (!ok && !hasError())
        raiseError(QCG::tr("Missing end tags."));
}

void CollectionConfigReader::readAssistantSettings()
{
    while (!atEnd()) {
        readNext();
        if (isStartElement()) {
            if (name() == QLatin1String("title")) {
                m_title = readElementText();
            } else if (name() == QLatin1String("homePage")) {
                m_homePage = readElementText();
            } else if (name() == QLatin1String("startPage")) {
                m_startPage = readElementText();
            } else if (name() == QLatin1String("currentFilter")) {
                m_currentFilter = readElementText();
            } else if (name() == QLatin1String("applicationIcon")) {
                m_applicationIcon = readElementText();
            } else if (name() == QLatin1String("enableFilterFunctionality")) {
                if (attributes().value(QLatin1String("visible")) == QLatin1String("true"))
                    m_hideFilterFunctionality = false;
                if (readElementText() == QLatin1String("false"))
                    m_enableFilterFunctionality = false;
            } else if (name() == QLatin1String("enableDocumentationManager")) {
                if (readElementText() == QLatin1String("false"))
                    m_enableDocumentationManager = false;
            } else if (name() == QLatin1String("enableAddressBar")) {
                if (attributes().value(QLatin1String("visible")) == QLatin1String("true"))
                    m_hideAddressBar = false;
                if (readElementText() == QLatin1String("false"))
                    m_enableAddressBar = false;
            } else if (name() == QLatin1String("aboutMenuText")) {
                readMenuTexts();
            } else if (name() == QLatin1String("aboutDialog")) {
                readAboutDialog();
            } else if (name() == u"cacheDirectory") {
                m_cacheDirRelativeToCollection =
                    attributes().value(QLatin1String("base"))
                    == QLatin1String("collection");
                m_cacheDirectory = readElementText();
            } else if (name() == QLatin1String("enableFullTextSearchFallback")) {
                if (readElementText() == QLatin1String("true"))
                    m_enableFullTextSearchFallback = true;
            } else {
                raiseErrorWithLine();
            }
        } else if (isEndElement() && name() == QLatin1String("assistant")) {
            break;
        }
    }
}

void CollectionConfigReader::readMenuTexts()
{
    while (!atEnd()) {
        readNext();
        if (isStartElement()) {
            if (name() == QLatin1String("text")) {
                QString lang = attributes().value(QLatin1String("language")).toString();
                if (lang.isEmpty())
                    lang = QLatin1String("default");
                m_aboutMenuTexts.insert(lang, readElementText());
            } else {
                raiseErrorWithLine();
            }
        } else if (isEndElement() && name() == QLatin1String("aboutMenuText")) {
            break;
        }
    }
}

void CollectionConfigReader::readAboutDialog()
{
    while (!atEnd()) {
        readNext();
        if (isStartElement()) {
            if (name() == QLatin1String("file")) {
                QString lang = attributes().value(QLatin1String("language")).toString();
                if (lang.isEmpty())
                    lang = QLatin1String("default");
                m_aboutTextFiles.insert(lang, readElementText());
            } else if (name() == QLatin1String("icon")) {
                m_aboutIcon = readElementText();
            } else {
                raiseErrorWithLine();
            }
        } else if (isEndElement() && name() == QLatin1String("aboutDialog")) {
            break;
        }
    }
}

void CollectionConfigReader::readDocFiles()
{
    while (!atEnd()) {
        readNext();
        if (isStartElement()) {
            if (name() == QLatin1String("generate")) {
                readGenerate();
            } else if (name() == QLatin1String("register")) {
                readRegister();
            } else {
                raiseErrorWithLine();
            }
        } else if (isEndElement() && name() == QLatin1String("docFiles")) {
            break;
        }
    }
}

void CollectionConfigReader::readGenerate()
{
    while (!atEnd()) {
        readNext();
        if (isStartElement()) {
            if (name() == QLatin1String("file"))
                readFiles();
            else
                raiseErrorWithLine();
        } else if (isEndElement() && name() == QLatin1String("generate")) {
            break;
        }
    }
}

void CollectionConfigReader::readFiles()
{
    QString input;
    QString output;
    while (!atEnd()) {
        readNext();
        if (isStartElement()) {
            if (name() == QLatin1String("input"))
                input = readElementText();
            else if (name() == QLatin1String("output"))
                output = readElementText();
            else
                raiseErrorWithLine();
        } else if (isEndElement() && name() == QLatin1String("file")) {
            break;
        }
    }
    if (input.isEmpty() || output.isEmpty()) {
        raiseError(QCG::tr("Missing input or output file for help file generation."));
        return;
    }
    m_filesToGenerate.insert(input, output);
}

void CollectionConfigReader::readRegister()
{
    while (!atEnd()) {
        readNext();
        if (isStartElement()) {
            if (name() == QLatin1String("file"))
                m_filesToRegister.append(readElementText());
            else
                raiseErrorWithLine();
        } else if (isEndElement() && name() == QLatin1String("register")) {
            break;
        }
    }
}