#include "localtrashdialog.h"

#include <entities/trashitem.h>
#include <utils/gui.h>

#include <QDebug>
#include <QDialogButtonBox>
#include <QPushButton>
#include <QSettings>
#include <QSplitter>

#include "ui_localtrashdialog.h"

class LocalTrashTreeWidgetItem : public QTreeWidgetItem {
   public:
    LocalTrashTreeWidgetItem(QTreeWidget *parent) : QTreeWidgetItem(parent) {}

   private:
    bool operator<(const QTreeWidgetItem &other) const {
        int column = treeWidget()->sortColumn();

        // allow sorting for the date column
        if (column == 1) {
            return data(column, Qt::UserRole).toInt() < other.data(column, Qt::UserRole).toInt();
        }

        return text(column).toLower() < other.text(column).toLower();
    }
};

LocalTrashDialog::LocalTrashDialog(QWidget *parent)
    : MasterDialog(parent), ui(new Ui::LocalTrashDialog) {
    ui->setupUi(this);
    afterSetupUI();

    // init the note browser search frame
    ui->noteBrowser->initSearchFrame(ui->noteBrowserSearchFrame);

    setupMainSplitter();

    QPushButton *button;
    ui->buttonBox->clear();

    button = new QPushButton(tr("Restore"), this);
    button->setToolTip(tr("Restore selected notes"));
    button->setProperty("ActionRole", Restore);
    button->setDefault(false);
    button->setIcon(QIcon::fromTheme(QStringLiteral("view-restore"),
                                     QIcon(":/icons/breeze-qownnotes/16x16/view-restore.svg")));
    ui->buttonBox->addButton(button, QDialogButtonBox::ActionRole);

    button = new QPushButton(tr("Remove"), this);
    button->setToolTip(tr("Remove selected notes"));
    button->setProperty("ActionRole", Remove);
    button->setDefault(false);
    button->setIcon(QIcon::fromTheme(QStringLiteral("edit-delete"),
                                     QIcon(":/icons/breeze-qownnotes/16x16/edit-delete.svg")));
    ui->buttonBox->addButton(button, QDialogButtonBox::ActionRole);

    //    button = new QPushButton(tr("Cancel"));
    //    button->setProperty("ActionRole", Cancel);
    //    button->setIcon(
    //            QIcon::fromTheme(
    //                    "dialog-cancel",
    //                    QIcon(":/icons/breeze-qownnotes/16x16/dialog-cancel.svg")));
    //    button->setDefault(true);
    //    ui->buttonBox->addButton(button, QDialogButtonBox::ActionRole);

    connect(this->ui->buttonBox, SIGNAL(clicked(QAbstractButton *)),
            SLOT(dialogButtonClicked(QAbstractButton *)));
    connect(this, SIGNAL(finished(int)), this, SLOT(storeSettings()));

    loadTrashedNotes();
}

/**
 * Loads the trashed notes
 */
void LocalTrashDialog::loadTrashedNotes() {
    QList<TrashItem> trashItems = TrashItem::fetchAll();
    QListIterator<TrashItem> iterator(trashItems);
    ui->trashTreeWidget->clear();
    ui->noteBrowser->clear();

    while (iterator.hasNext()) {
        TrashItem trashItem = iterator.next();

        auto *item = new LocalTrashTreeWidgetItem(ui->trashTreeWidget);
        item->setText(0, trashItem.getFileName());
        item->setText(1, trashItem.getCreated().toString());
        item->setData(0, Qt::UserRole, trashItem.getId());
        // add timestamp data to allow sorting
        item->setData(1, Qt::UserRole, trashItem.getCreated().toMSecsSinceEpoch());

        QString toolTipText =
            tr("File will be restored to: %1").arg(trashItem.restorationFilePath());

        // mark missing items if file is missing
        if (!trashItem.fileExists()) {
            item->setIcon(
                0, QIcon::fromTheme(QStringLiteral("edit-delete"),
                                    QIcon(":/icons/breeze-qownnotes/16x16/edit-delete.svg")));
            toolTipText = tr("File <strong>%1</strong> isn't readable and can't"
                             " be restored!")
                              .arg(trashItem.fullFilePath());
        }

        item->setToolTip(0, toolTipText);
        item->setToolTip(1, toolTipText);

        ui->trashTreeWidget->addTopLevelItem(item);
    }

    ui->trashTreeWidget->sortItems(1, Qt::SortOrder::DescendingOrder);
    ui->trashTreeWidget->resizeColumnToContents(0);
}

void LocalTrashDialog::setupMainSplitter() {
    trashSplitter = new QSplitter(this);

    trashSplitter->addWidget(ui->listFrame);
    trashSplitter->addWidget(ui->noteBrowserFrame);

    // restore splitter sizes
    QSettings settings;
    QByteArray state = settings.value(QStringLiteral("localTrashSplitterSizes")).toByteArray();
    trashSplitter->restoreState(state);

    ui->gridLayout->layout()->addWidget(trashSplitter);
    ui->gridLayout->layout()->addWidget(ui->buttonBox);
}

void LocalTrashDialog::storeSettings() {
    // store the splitter sizes
    QSettings settings;
    settings.setValue(QStringLiteral("localTrashSplitterSizes"), trashSplitter->saveState());
}

LocalTrashDialog::~LocalTrashDialog() { delete ui; }

void LocalTrashDialog::dialogButtonClicked(QAbstractButton *button) {
    int actionRole = button->property("ActionRole").toInt();

    switch (actionRole) {
        case Remove: {
            removeSelectedTrashItems();
            break;
        }

        case Restore: {
            restoreSelectedTrashItems();
            break;
        }

        default:
            this->close();
            break;
    }
}

/**
 * Load the note text of the currently selected item
 *
 * @param current
 * @param previous
 */
void LocalTrashDialog::on_trashTreeWidget_currentItemChanged(QTreeWidgetItem *current,
                                                             QTreeWidgetItem *previous) {
    Q_UNUSED(previous);
    int trashItemId = current->data(0, Qt::UserRole).toInt();
    TrashItem trashItem = TrashItem::fetch(trashItemId);

    QString text = trashItem.loadFileFromDisk();
    ui->noteBrowser->setPlainText(text);
}

/**
 * Restores selected notes
 */
void LocalTrashDialog::restoreSelectedTrashItems() {
    int selectedItemsCount = ui->trashTreeWidget->selectedItems().count();

    if (selectedItemsCount == 0) {
        return;
    }

    if (Utils::Gui::question(
            this, tr("Restore selected notes"),
            tr("Restore <strong>%n</strong> selected note(s)?", "", selectedItemsCount),
            QStringLiteral("local-trash-restore-notes")) == QMessageBox::Yes) {
        const QSignalBlocker blocker(ui->trashTreeWidget);
        Q_UNUSED(blocker)

        int restoreCount = 0;
        Q_FOREACH (QTreeWidgetItem *item, ui->trashTreeWidget->selectedItems()) {
            int id = item->data(0, Qt::UserRole).toInt();
            TrashItem trashItem = TrashItem::fetch(id);
            bool wasRestored = trashItem.restoreFile();
            if (wasRestored) {
                qDebug() << "Restored note " << trashItem.getFileName();
                restoreCount++;
            } else {
                qDebug() << "Note " << trashItem.getFileName()
                         << " "
                            "couldn't be restored!";
            }
        }

        Utils::Gui::information(this, tr("Notes restored"),
                                tr("<strong>%n</strong> note(s) were restored", "", restoreCount),
                                QStringLiteral("local-trash-notes-restored"));

        if (restoreCount > 0) {
            loadTrashedNotes();
        }
    }
}

/**
 * Remove selected trashed notes
 */
void LocalTrashDialog::removeSelectedTrashItems() {
    int selectedItemsCount = ui->trashTreeWidget->selectedItems().count();

    if (selectedItemsCount == 0) {
        return;
    }

    if (Utils::Gui::question(
            this, tr("Remove selected notes"),
            tr("Remove <strong>%n</strong> selected note(s)?", "", selectedItemsCount),
            QStringLiteral("local-trash-remove-notes")) == QMessageBox::Yes) {
        const QSignalBlocker blocker(ui->trashTreeWidget);
        Q_UNUSED(blocker)

        int removeCount = 0;
        Q_FOREACH (QTreeWidgetItem *item, ui->trashTreeWidget->selectedItems()) {
            int id = item->data(0, Qt::UserRole).toInt();
            TrashItem trashItem = TrashItem::fetch(id);
            bool wasRestored = trashItem.remove(true);
            if (wasRestored) {
                qDebug() << "Removed note " << trashItem.getFileName();
                removeCount++;
            } else {
                qDebug() << "Note " << trashItem.getFileName()
                         << " "
                            "couldn't be removed!";
            }
        }

        Utils::Gui::information(this, tr("Notes removed"),
                                tr("<strong>%n</strong> note(s) were removed", "", removeCount),
                                QStringLiteral("local-trash-notes-removed"));

        if (removeCount > 0) {
            loadTrashedNotes();
        }
    }
}

void LocalTrashDialog::on_searchLineEdit_textChanged(const QString &arg1) {
    Utils::Gui::searchForTextInTreeWidget(ui->trashTreeWidget, arg1);
}
