/*
    SPDX-FileCopyrightText: 2005-2018 Thomas Baumgart <tbaumgart@kde.org>
    SPDX-FileCopyrightText: 2017 Łukasz Wojniłowicz <lukasz.wojnilowicz@gmail.com>
    SPDX-License-Identifier: GPL-2.0-or-later
*/

#include "ksettingshome.h"

// ----------------------------------------------------------------------------
// QT Includes

#include <QStringList>
#include <QPushButton>
#include <QIcon>

// ----------------------------------------------------------------------------
// KDE Includes

#include <KLocalizedString>

// ----------------------------------------------------------------------------
// Project Includes

#include "ui_ksettingshome.h"

#include "kmymoneysettings.h"
#include "kmymoney/kmymoneyutils.h"
#include "icons/icons.h"

using namespace Icons;

class KSettingsHomePrivate
{
    Q_DISABLE_COPY(KSettingsHomePrivate)

public:
    KSettingsHomePrivate() :
        ui(new Ui::KSettingsHome),
        m_noNeedToUpdateList(false)
    {
    }

    ~KSettingsHomePrivate()
    {
        delete ui;
    }

    Ui::KSettingsHome *ui;
    bool m_noNeedToUpdateList;
};

KSettingsHome::KSettingsHome(QWidget* parent) :
    QWidget(parent),
    d_ptr(new KSettingsHomePrivate)
{
    Q_D(KSettingsHome);
    d->ui->setupUi(this);
    d->ui->m_homePageList->setSortingEnabled(false);

    d->ui->m_upButton->setIcon(Icons::get(Icon::ArrowUp));
    d->ui->m_downButton->setIcon(Icons::get(Icon::ArrowDown));

    d->ui->m_upButton->setEnabled(false);
    d->ui->m_downButton->setEnabled(false);

    // connect this, so that the list gets loaded once the edit field is filled
    connect(d->ui->kcfg_ItemList, &QLineEdit::textChanged, this, &KSettingsHome::slotLoadItems);

    connect(d->ui->m_homePageList, &QListWidget::itemSelectionChanged,
            this, &KSettingsHome::slotSelectHomePageItem);
    connect(d->ui->m_homePageList, &QAbstractItemView::clicked, this, &KSettingsHome::slotUpdateItemList);

    connect(d->ui->m_upButton, &QAbstractButton::clicked, this, &KSettingsHome::slotMoveUp);
    connect(d->ui->m_downButton, &QAbstractButton::clicked, this, &KSettingsHome::slotMoveDown);

    // Don't show it to the user, we only need it to load and save the settings
    d->ui->kcfg_ItemList->hide();
}

KSettingsHome::~KSettingsHome()
{
    Q_D(KSettingsHome);
    delete d;
}

void KSettingsHome::slotLoadItems()
{
    Q_D(KSettingsHome);
    if (d->m_noNeedToUpdateList)
        return;

    QStringList list = KMyMoneySettings::listOfItems();
    QStringList::ConstIterator it;
    d->ui->m_homePageList->clear();
    QListWidgetItem *sel = 0;

    for (it = list.constBegin(); it != list.constEnd(); ++it) {
        int idx = (*it).toInt();
        // skip over unknown item entries
        if (idx == 0)
            continue;

        // "Forecast (history)" is currently unused (s.a. KHomeViewPrivate::loadView()
        // and KMyMoneyUtils::homePageItems so we don't present it to the user.
        // We cannot remove it since the settings value is the index into the list.
        if (idx == 7)
            continue;

        bool enabled = idx > 0;
        if (!enabled) idx = -idx;
        QListWidgetItem* item = new QListWidgetItem(d->ui->m_homePageList);
        item->setText(KMyMoneyUtils::homePageItemToString(idx));
        item->setFlags(item->flags() | Qt::ItemIsUserCheckable);

        item->setCheckState(enabled ? Qt::Checked : Qt::Unchecked);

        if (sel == 0)
            sel = item;
    }

    if (sel) {
        d->ui->m_homePageList->setCurrentItem(sel);
        slotSelectHomePageItem();
    }
}

void KSettingsHome::slotUpdateItemList()
{
    Q_D(KSettingsHome);
    QString list;
    QListWidgetItem *it;

    for (it = d->ui->m_homePageList->item(0); it;) {
        int item = KMyMoneyUtils::stringToHomePageItem(it->text());
        if (it->checkState() == Qt::Unchecked)
            item = -item;
        list += QString::number(item);
        if (d->ui->m_homePageList->count() > (d->ui->m_homePageList->row(it) + 1)) {
            it = d->ui->m_homePageList->item(d->ui->m_homePageList->row(it) + 1);
            if (it) {
                list += ',';
            }
        } else {
            break;
        }
    }

    // don't update the list
    d->m_noNeedToUpdateList = true;
    d->ui->kcfg_ItemList->setText(list);
    d->m_noNeedToUpdateList = false;
}

void KSettingsHome::slotSelectHomePageItem()
{
    Q_D(KSettingsHome);
    auto item = d->ui->m_homePageList->currentItem();
    d->ui->m_upButton->setEnabled(d->ui->m_homePageList->item(0) != item);
    d->ui->m_downButton->setEnabled(d->ui->m_homePageList->count() > (d->ui->m_homePageList->row(item) + 1));
}

void KSettingsHome::slotMoveUp()
{
    Q_D(KSettingsHome);
    auto item = d->ui->m_homePageList->currentItem();
    auto prev = d->ui->m_homePageList->item(d->ui->m_homePageList->row(item) - 1);
    int prevRow = d->ui->m_homePageList->row(prev);
    if (prev) {
        d->ui->m_homePageList->takeItem(d->ui->m_homePageList->row(item));
        d->ui->m_homePageList->insertItem(prevRow, item);
        d->ui->m_homePageList->setCurrentRow(d->ui->m_homePageList->row(item));
        slotSelectHomePageItem();
        slotUpdateItemList();
    }
}

void KSettingsHome::slotMoveDown()
{
    Q_D(KSettingsHome);
    auto item = d->ui->m_homePageList->currentItem();
    auto next = d->ui->m_homePageList->item(d->ui->m_homePageList->row(item) + 1);
    int nextRow = d->ui->m_homePageList->row(next);
    if (next) {
        d->ui->m_homePageList->takeItem(d->ui->m_homePageList->row(item));
        d->ui->m_homePageList->insertItem(nextRow, item);
        d->ui->m_homePageList->setCurrentRow(d->ui->m_homePageList->row(item));
        slotSelectHomePageItem();
        slotUpdateItemList();
    }
}
