/***************************************************************************
 *   Copyright (C) 2003 by Sébastien Laoût                                 *
 *   slaout@linux62.org                                                    *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

#include "formatimporter.h"

#include <QtCore/QString>
#include <QtCore/QStringList>
#include <QtCore/QDir>
#include <QtCore/QTextStream>
#include <QtXml/QDomDocument>
#include <QLocale>
#include <QApplication>

#include <KMessageBox>
#include <KIO/CopyJob>
#include <KLocalizedString>

#include "notecontent.h"
#include "notefactory.h"
#include "bnpview.h"
#include "basketscene.h"
#include "global.h"
#include "xmlwork.h"
#include "tools.h"



bool FormatImporter::shouldImportBaskets()
{
    // We should import if the application have not successfully loaded any basket...
    if (Global::bnpView->topLevelItemCount() >= 0)
        return false;

    // ... And there is at least one folder in the save folder, with a ".basket" file inside that folder.
    QDir dir(Global::savesFolder(), QString::null, QDir::Name | QDir::IgnoreCase, QDir::Dirs | QDir::NoSymLinks);
    QStringList list = dir.entryList();
    for (QStringList::Iterator it = list.begin(); it != list.end(); ++it)
        if (*it != "." && *it != ".." && dir.exists(Global::savesFolder() + *it + "/.basket"))
            return true;

    return false;
}

void FormatImporter::copyFolder(const QString &folder, const QString &newFolder)
{
    copyFinished = false;
    KIO::CopyJob *copyJob = KIO::copyAs(QUrl::fromLocalFile(folder), QUrl::fromLocalFile(newFolder), KIO::HideProgressInfo);
    connect(copyJob, &KIO::CopyJob::copyingDone, this, &FormatImporter::slotCopyingDone);
    while (!copyFinished)
        qApp->processEvents();
}

void FormatImporter::moveFolder(const QString &folder, const QString &newFolder)
{
    copyFinished = false;
    KIO::CopyJob *copyJob = KIO::moveAs(QUrl::fromLocalFile(folder), QUrl::fromLocalFile(newFolder), KIO::HideProgressInfo);
    connect(copyJob, &KIO::CopyJob::copyingDone, this, &FormatImporter::slotCopyingDone);
    while (!copyFinished)
        qApp->processEvents();
}

void FormatImporter::slotCopyingDone(KIO::Job *)
{
//  qDebug() << "Copy finished of " + from.path() + " to " + to.path();
    copyFinished = true;
}

void FormatImporter::importBaskets()
{
    qDebug() << "Import Baskets: Preparing...";

    // Some preliminary preparations (create the destination folders and the basket tree file):
    QDir dirPrep;
    dirPrep.mkdir(Global::savesFolder());
    dirPrep.mkdir(Global::basketsFolder());
    QDomDocument document("basketTree");
    QDomElement root = document.createElement("basketTree");
    document.appendChild(root);

    // First up, establish a list of every baskets, ensure the old order (if any), and count them.
    QStringList baskets;

    // Read the 0.5.0 baskets order:
    QDomDocument *doc = XMLWork::openFile("container", Global::savesFolder() + "container.baskets");
    if (doc != 0) {
        QDomElement docElem = doc->documentElement();
        QDomElement basketsElem = XMLWork::getElement(docElem, "baskets");
        QDomNode n = basketsElem.firstChild();
        while (!n.isNull()) {
            QDomElement e = n.toElement();
            if ((!e.isNull()) && e.tagName() == "basket")
                baskets.append(e.text());
            n = n.nextSibling();
        }
    }

    // Then load the baskets that weren't loaded (import < 0.5.0 ones):
    QDir dir(Global::savesFolder(), QString::null, QDir::Name | QDir::IgnoreCase, QDir::Dirs | QDir::NoSymLinks);
    QStringList list = dir.entryList();
    if (list.count() > 2) // Pass "." and ".."
        for (QStringList::Iterator it = list.begin(); it != list.end(); ++it) // For each folder
            if (*it != "." && *it != ".." && dir.exists(Global::savesFolder() + *it + "/.basket")) // If it can be a basket folder
                if (!(baskets.contains((*it) + "/")) && baskets.contains(*it))   // And if it is not already in the imported baskets list
                    baskets.append(*it);

    qDebug() << "Import Baskets: Found " << baskets.count() << " baskets to import.";

    // Import every baskets:
    int i = 0;
    for (QStringList::iterator it = baskets.begin(); it != baskets.end(); ++it) {
        ++i;
        qDebug() << "Import Baskets: Importing basket " << i << " of " << baskets.count() << "...";

        // Move the folder to the new repository (normal basket) or copy the folder (mirorred folder):
        QString folderName = *it;
        if (folderName.startsWith('/')) { // It was a folder mirror:
            KMessageBox::information(0, i18n("<p>Folder mirroring is not possible anymore (see <a href='http://basket-notepads.github.io'>basket-notepads.github.io</a> for more information).</p>"
                                             "<p>The folder <b>%1</b> has been copied for the basket needs. You can either delete this folder or delete the basket, or use both. But remember that "
                                             "modifying one will not modify the other anymore as they are now separate entities.</p>", folderName), i18n("Folder Mirror Import"),
                                     "", KMessageBox::AllowLink);
            // Also modify folderName to be only the folder name and not the full path anymore:
            QString newFolderName = folderName;
            if (newFolderName.endsWith('/'))
                newFolderName = newFolderName.left(newFolderName.length() - 1);
            newFolderName = newFolderName.mid(newFolderName.lastIndexOf('/') + 1);
            newFolderName = Tools::fileNameForNewFile(newFolderName, Global::basketsFolder());
            FormatImporter f;
            f.copyFolder(folderName, Global::basketsFolder() + newFolderName);
            folderName = newFolderName;
        } else
            dir.rename(Global::savesFolder() + folderName, Global::basketsFolder() + folderName); // Move the folder

        // Import the basket structure file and get the properties (to add them in the tree basket-properties cache):
        QDomElement properties = importBasket(folderName);

        // Add it to the XML document:
        QDomElement basketElement = document.createElement("basket");
        root.appendChild(basketElement);
        basketElement.setAttribute("folderName", folderName);
        basketElement.appendChild(properties);
    }

    // Finalize (write to disk and delete now useless files):
    qDebug() << "Import Baskets: Finalizing...";

    QFile file(Global::basketsFolder() + "baskets.xml");
    if (file.open(QIODevice::WriteOnly)) {
        QTextStream stream(&file);
        stream.setCodec("UTF-8");
        QString xml = document.toString();
        stream << "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n";
        stream << xml;
        file.close();
    }

    Tools::deleteRecursively(Global::savesFolder() + ".tmp");
    dir.remove(Global::savesFolder() + "container.baskets");

    qDebug() << "Import Baskets: Finished.";
}

QDomElement FormatImporter::importBasket(const QString &folderName)
{
    // Load the XML file:
    QDomDocument *document = XMLWork::openFile("basket", Global::basketsFolder() + folderName + "/.basket");
    if (!document) {
        qDebug() << "Import Baskets: Failed to read the basket file!";
        return QDomElement();
    }
    QDomElement docElem = document->documentElement();

    // Import properties (change <background color=""> to <appearance backgroundColor="">, and figure out if is a checklist or not):
    QDomElement properties = XMLWork::getElement(docElem, "properties");
    QDomElement background = XMLWork::getElement(properties, "background");
    QColor backgroundColor = QColor(background.attribute("color"));
    if (backgroundColor.isValid() && (backgroundColor != qApp->palette().color(QPalette::Base))) { // Use the default color if it was already that color:
        QDomElement appearance = document->createElement("appearance");
        appearance.setAttribute("backgroundColor", backgroundColor.name());
        properties.appendChild(appearance);
    }
    QDomElement disposition = document->createElement("disposition");
    disposition.setAttribute("mindMap",     "false");
    disposition.setAttribute("columnCount", "1");
    disposition.setAttribute("free",        "false");
    bool isCheckList = XMLWork::trueOrFalse(XMLWork::getElementText(properties, "showCheckBoxes"), false);

    // Insert all notes in a group (column): 1/ rename "items" to "group", 2/ add "notes" to root, 3/ move "group" into "notes"
    QDomElement column = XMLWork::getElement(docElem, "items");
    column.setTagName("group");
    QDomElement notes = document->createElement("notes");
    notes.appendChild(column);
    docElem.appendChild(notes);

    // Import notes from older representations:
    QDomNode n = column.firstChild();
    while (! n.isNull()) {
        QDomElement e = n.toElement();
        if (!e.isNull()) {
            e.setTagName("note");
            QDomElement content = XMLWork::getElement(e, "content");
            // Add Check tag:
            if (isCheckList) {
                bool isChecked = XMLWork::trueOrFalse(e.attribute("checked", "false"));
                XMLWork::addElement(*document, e, "tags", (isChecked ? "todo_done" : "todo_unchecked"));
            }
            // Import annotations as folded groups:
            QDomElement parentE = column;
            QString annotations = XMLWork::getElementText(e, "annotations", "");
            if (!annotations.isEmpty()) {
                QDomElement annotGroup = document->createElement("group");
                column.insertBefore(annotGroup, e);
                annotGroup.setAttribute("folded", "true");
                annotGroup.appendChild(e);
                parentE = annotGroup;
                // Create the text note and add it to the DOM tree:
                QDomElement annotNote = document->createElement("note");
                annotNote.setAttribute("type", "text");
                annotGroup.appendChild(annotNote);
                QString annotFileName = Tools::fileNameForNewFile("annotations1.txt", BasketScene::fullPathForFolderName(folderName));
                QString annotFullPath = BasketScene::fullPathForFolderName(folderName) + "/" + annotFileName;
                QFile file(annotFullPath);
                if (file.open(QIODevice::WriteOnly)) {
                    QTextStream stream(&file);
                    stream << annotations;
                    file.close();
                }
                XMLWork::addElement(*document, annotNote, "content", annotFileName);
                n = annotGroup;
            }
            // Import Launchers from 0.3.x, 0.4.0 and 0.5.0-alphas:
            QString runCommand = e.attribute("runcommand"); // Keep compatibility with 0.4.0 and 0.5.0-alphas versions
            runCommand = XMLWork::getElementText(e, "action", runCommand); // Keep compatibility with 0.3.x versions
            if (! runCommand.isEmpty()) {   // An import should be done
                // Prepare the launcher note:
                QString title = content.attribute("title", "");
                QString icon  = content.attribute("icon",  "");
                if (title.isEmpty()) title = runCommand;
                if (icon.isEmpty())  icon  = NoteFactory::iconForCommand(runCommand);
                // Import the launcher note:
                // Adapted version of "QString launcherName = NoteFactory::createNoteLauncherFile(runCommand, title, icon, this)":
                QString launcherContent = QString(
                                              "[Desktop Entry]\n"
                                              "Exec=%1\n"
                                              "Name=%2\n"
                                              "Icon=%3\n"
                                              "Encoding=UTF-8\n"
                                              "Type=Application\n").arg(runCommand, title, icon.isEmpty() ? QString("exec") : icon);
                QString launcherFileName = Tools::fileNameForNewFile("launcher.desktop", Global::basketsFolder() + folderName /*+ "/"*/);
                QString launcherFullPath = Global::basketsFolder() + folderName /*+ "/"*/ + launcherFileName;
                QFile file(launcherFullPath);
                if (file.open(QIODevice::WriteOnly)) {
                    QTextStream stream(&file);
                    stream.setCodec("UTF-8");
                    stream << launcherContent;
                    file.close();
                }
                // Add the element to the DOM:
                QDomElement launcherElem = document->createElement("note");
                parentE.insertBefore(launcherElem, e);
                launcherElem.setAttribute("type", "launcher");
                XMLWork::addElement(*document, launcherElem, "content", launcherFileName);
            }
            // Import unknown ns to 0.6.0:
            if (e.attribute("type") == "unknow")
                e.setAttribute("type", "unknown");
            // Import links from version < 0.5.0:
            if (!content.attribute("autotitle").isEmpty() && content.attribute("autoTitle").isEmpty())
                content.setAttribute("autoTitle", content.attribute("autotitle"));
            if (!content.attribute("autoicon").isEmpty() && content.attribute("autoIcon").isEmpty())
                content.setAttribute("autoIcon", content.attribute("autoicon"));
        }
        n = n.nextSibling();
    }

    // Save the resulting XML file:
    QFile file(Global::basketsFolder() + folderName + "/.basket");
    if (file.open(QIODevice::WriteOnly)) {
        QTextStream stream(&file);
        stream.setCodec("UTF-8");
//      QString xml = document->toString();
//      stream << "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n";
//      stream << xml;
        stream << document->toString(); // Document is ALREADY using UTF-8
        file.close();
    } else
        qDebug() << "Import Baskets: Failed to save the basket file!";

    // Return the newly created properties (to put in the basket tree):
    return properties;
}

