/****************************************************************************
**
** Copyright (C) 2016 Nicolas Arnaud-Cormos
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
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**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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****************************************************************************/

#include "macrooptionswidget.h"

#include "macrosconstants.h"
#include "macromanager.h"
#include "macro.h"

#include <coreplugin/icore.h>
#include <coreplugin/coreconstants.h>
#include <coreplugin/actionmanager/actionmanager.h>
#include <coreplugin/actionmanager/command.h>

#include <utils/layoutbuilder.h>

#include <QAction>
#include <QDir>
#include <QFileInfo>
#include <QGroupBox>
#include <QHeaderView>
#include <QLabel>
#include <QLineEdit>
#include <QPushButton>
#include <QTreeWidget>
#include <QTreeWidgetItem>

namespace Macros::Internal {

const int NAME_ROLE = Qt::UserRole;
const int WRITE_ROLE = Qt::UserRole + 1;

MacroOptionsWidget::MacroOptionsWidget()
{
    m_treeWidget = new QTreeWidget;
    m_treeWidget->setTextElideMode(Qt::ElideLeft);
    m_treeWidget->setUniformRowHeights(true);
    m_treeWidget->setSortingEnabled(true);
    m_treeWidget->setColumnCount(3);
    m_treeWidget->header()->setSortIndicatorShown(true);
    m_treeWidget->header()->setStretchLastSection(true);
    m_treeWidget->header()->setSortIndicator(0, Qt::AscendingOrder);
    m_treeWidget->setHeaderLabels({tr("Name"), tr("Description)"), tr("Shortcut")});

    m_description = new QLineEdit;

    m_removeButton = new QPushButton(tr("Remove"));

    m_macroGroup = new QGroupBox(tr("Macro"), this);

    using namespace Utils::Layouting;

    Row {
        tr("Description:"), m_description
    }.attachTo(m_macroGroup);

    Column {
        Group {
            Title(tr("Preferences")),
            Row {
                m_treeWidget,
                Column { m_removeButton, Stretch() },
            }
        },
        m_macroGroup
    }.attachTo(this);

    connect(m_treeWidget, &QTreeWidget::currentItemChanged,
            this, &MacroOptionsWidget::changeCurrentItem);
    connect(m_removeButton, &QPushButton::clicked,
            this, &MacroOptionsWidget::remove);
    connect(m_description, &QLineEdit::textChanged,
            this, &MacroOptionsWidget::changeDescription);

    initialize();
}

MacroOptionsWidget::~MacroOptionsWidget() = default;

void MacroOptionsWidget::initialize()
{
    m_macroToRemove.clear();
    m_macroToChange.clear();
    m_treeWidget->clear();
    changeCurrentItem(nullptr);

    // Create the treeview
    createTable();
}

void MacroOptionsWidget::createTable()
{
    QDir dir(MacroManager::macrosDirectory());
    const Utils::Id base = Utils::Id(Constants::PREFIX_MACRO);
    for (Macro *macro : MacroManager::macros()) {
        QFileInfo fileInfo(macro->fileName());
        if (fileInfo.absoluteDir() == dir.absolutePath()) {
            auto macroItem = new QTreeWidgetItem(m_treeWidget);
            macroItem->setText(0, macro->displayName());
            macroItem->setText(1, macro->description());
            macroItem->setData(0, NAME_ROLE, macro->displayName());
            macroItem->setData(0, WRITE_ROLE, macro->isWritable());

            Core::Command *command =
                    Core::ActionManager::command(base.withSuffix(macro->displayName()));
            if (command && command->action()) {
                macroItem->setText(2,
                                   command->action()->shortcut().toString(QKeySequence::NativeText));
            }
        }
    }
}

void MacroOptionsWidget::changeCurrentItem(QTreeWidgetItem *current)
{
    m_changingCurrent = true;
    m_removeButton->setEnabled(current);
    m_macroGroup->setEnabled(current);
    if (!current) {
        m_description->clear();
    } else {
        m_description->setText(current->text(1));
        m_description->setEnabled(current->data(0, WRITE_ROLE).toBool());
    }
    m_changingCurrent = false;
}

void MacroOptionsWidget::remove()
{
    QTreeWidgetItem *current = m_treeWidget->currentItem();
    m_macroToRemove.append(current->data(0, NAME_ROLE).toString());
    delete current;
}

void MacroOptionsWidget::apply()
{
    // Remove macro
    for (const QString &name : qAsConst(m_macroToRemove)) {
        MacroManager::instance()->deleteMacro(name);
        m_macroToChange.remove(name);
    }

    // Change macro
    for (auto it = m_macroToChange.cbegin(), end = m_macroToChange.cend(); it != end; ++it)
        MacroManager::instance()->changeMacro(it.key(), it.value());

    // Reinitialize the page
    initialize();
}

void MacroOptionsWidget::changeDescription(const QString &description)
{
    QTreeWidgetItem *current = m_treeWidget->currentItem();
    if (m_changingCurrent || !current)
        return;

    QString macroName = current->data(0, NAME_ROLE).toString();
    m_macroToChange[macroName] = description;
    current->setText(1, description);
    QFont font = current->font(1);
    font.setItalic(true);
    current->setFont(1, font);
}

} // Macros::Internal