// Own includes
#include "plistparser.h"

// Qt includes
#include <QDateTime>
#include <QDebug>
#include <QDomDocument>
#include <QDomNode>

QVariant PListParser::parsePList(QIODevice* device)
{
    QVariantMap result;
    QDomDocument doc;
    QString errorMessage;
    int errorLine;
    int errorColumn;
    bool success = doc.setContent(device, false, &errorMessage, &errorLine, &errorColumn);
    if (!success) {
        qDebug() << "PListParser Warning: Could not parse PList file!";
        qDebug() << "Error message: " << errorMessage;
        qDebug() << "Error line: " << errorLine;
        qDebug() << "Error column: " << errorColumn;
        return result;
    }
    QDomElement root = doc.documentElement();
    if (root.attribute(QStringLiteral("version"), QStringLiteral("1.0")) != QLatin1String("1.0")) {
        qDebug() << "PListParser Warning: plist is using an unknown format version, parsing might fail unexpectedly";
    }
    return parseElement(root.firstChild().toElement());
}

QVariant PListParser::parseElement(const QDomElement& e)
{
    QString tagName = e.tagName();
    //qDebug() << tagName;
    QVariant result;
    if (tagName == QLatin1String("dict")) {
        result = parseDictElement(e);
    } else if (tagName == QLatin1String("array")) {
        result = parseArrayElement(e);
    } else if (tagName == QLatin1String("string")) {
        result = e.text();
    } else if (tagName == QLatin1String("data")) {

        result = QByteArray::fromBase64(e.text().toUtf8());

    } else if (tagName == QLatin1String("integer")) {
        //result = e.text().toInt();
        result = e.text().toLongLong(); //特别注意：原来的Int有点小，没法显示长数字
    }

    else if (tagName == QLatin1String("real")) {
        result = e.text().toFloat();
    } else if (tagName == QLatin1String("true")) {
        result = true;
    } else if (tagName == QLatin1String("false")) {
        result = false;
    } else if (tagName == QLatin1String("date")) {
        result = QDateTime::fromString(e.text(), Qt::ISODate);
    } else {
        qDebug() << "PListParser Warning: Invalid tag found: " << e.tagName() << e.text();
    }
    return result;
}

QVariantList PListParser::parseArrayElement(const QDomElement& element)
{
    QVariantList result;
    QDomNodeList children = element.childNodes();
    for (int i = 0; i < children.count(); i++) {
        QDomNode child = children.at(i);
        QDomElement e = child.toElement();
        if (!e.isNull()) {
            result.append(parseElement(e));
        }
    }
    return result;
}

QVariantMap PListParser::parseDictElement(const QDomElement& element)
{
    QVariantMap result;
    QDomNodeList children = element.childNodes();
    QString currentKey;
    for (int i = 0; i < children.count(); i++) {
        QDomNode child = children.at(i);
        QDomElement e = child.toElement();
        if (!e.isNull()) {
            QString tagName = e.tagName();
            if (tagName == QLatin1String("key")) {
                currentKey = e.text();
            } else if (!currentKey.isEmpty()) {
                result[currentKey] = parseElement(e);
            }
        }
    }
    return result;
}