/****************************************************************************
**
** Copyright (C) 2020 The Qt Company Ltd.
** 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
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or (at your option) any later version.
** The licenses are as published by the Free Software Foundation
** and appearing in the file LICENSE.LGPLv21 included in the packaging
** of this file. Please review the following information to ensure
** the GNU Lesser General Public License version 2.1 requirements
** will be met: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** 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.
**
****************************************************************************/

#include "workspacemodel.h"

#include "dockmanager.h"
#include "workspacedialog.h"

#include <utils/algorithm.h>
#include <utils/fileutils.h>
#include <utils/stringutils.h>

#include <QDir>
#include <QFileInfo>

namespace ADS {

WorkspaceModel::WorkspaceModel(DockManager *manager, QObject *parent)
    : QAbstractTableModel(parent)
    , m_manager(manager)
{
    m_sortedWorkspaces = m_manager->workspaces();
    connect(m_manager, &DockManager::workspaceLoaded, this, &WorkspaceModel::resetWorkspaces);
}

int WorkspaceModel::indexOfWorkspace(const QString &workspace)
{
    return m_sortedWorkspaces.indexOf(workspace);
}

QString WorkspaceModel::workspaceAt(int row) const
{
    return m_sortedWorkspaces.value(row, QString());
}

QVariant WorkspaceModel::headerData(int section, Qt::Orientation orientation, int role) const
{
    QVariant result;
    if (orientation == Qt::Horizontal) {
        switch (role) {
        case Qt::DisplayRole:
            switch (section) {
            case 0:
                result = tr("Workspace");
                break;
            case 1:
                result = tr("Last Modified");
                break;
            } // switch (section)
            break;
        } // switch (role)
    }
    return result;
}

int WorkspaceModel::columnCount(const QModelIndex &) const
{
    static int sectionCount = 0;
    if (sectionCount == 0) {
        // headers sections defining possible columns
        while (!headerData(sectionCount, Qt::Horizontal, Qt::DisplayRole).isNull())
            sectionCount++;
    }

    return sectionCount;
}

int WorkspaceModel::rowCount(const QModelIndex &) const
{
    return m_sortedWorkspaces.count();
}

QStringList pathsToBaseNames(const QStringList &paths)
{
    return Utils::transform(paths,
                            [](const QString &path) { return QFileInfo(path).completeBaseName(); });
}

QStringList pathsWithTildeHomePath(const QStringList &paths)
{
    return Utils::transform(paths, [](const QString &path) {
        return Utils::withTildeHomePath(QDir::toNativeSeparators(path));
    });
}

QVariant WorkspaceModel::data(const QModelIndex &index, int role) const
{
    QVariant result;
    if (index.isValid()) {
        QString workspaceName = m_sortedWorkspaces.at(index.row());

        switch (role) {
        case Qt::DisplayRole:
            switch (index.column()) {
            case 0:
                result = workspaceName;
                break;
            case 1:
                result = m_manager->workspaceDateTime(workspaceName);
                break;
            } // switch (section)
            break;
        case Qt::FontRole: {
            QFont font;
            if (m_manager->isDefaultWorkspace(workspaceName))
                font.setItalic(true);
            else
                font.setItalic(false);
            if (m_manager->activeWorkspace() == workspaceName
                && !m_manager->isFactoryDefaultWorkspace(workspaceName))
                font.setBold(true);
            else
                font.setBold(false);
            result = font;
        } break;
        case DefaultWorkspaceRole:
            result = m_manager->isDefaultWorkspace(workspaceName);
            break;
        case LastWorkspaceRole:
            result = m_manager->lastWorkspace() == workspaceName;
            break;
        case ActiveWorkspaceRole:
            result = m_manager->activeWorkspace() == workspaceName;
            break;
        } // switch (role)
    }

    return result;
}

QHash<int, QByteArray> WorkspaceModel::roleNames() const
{
    static QHash<int, QByteArray> extraRoles{{Qt::DisplayRole, "workspaceName"},
                                             {DefaultWorkspaceRole, "defaultWorkspace"},
                                             {LastWorkspaceRole, "activeWorkspace"},
                                             {ActiveWorkspaceRole, "lastWorkspace"}};
    return QAbstractTableModel::roleNames().unite(extraRoles);
}

void WorkspaceModel::sort(int column, Qt::SortOrder order)
{
    beginResetModel();
    const auto cmp = [this, column, order](const QString &s1, const QString &s2) {
        bool isLess;
        if (column == 0)
            isLess = s1 < s2;
        else
            isLess = m_manager->workspaceDateTime(s1) < m_manager->workspaceDateTime(s2);
        if (order == Qt::DescendingOrder)
            isLess = !isLess;
        return isLess;
    };
    Utils::sort(m_sortedWorkspaces, cmp);
    endResetModel();
}

bool WorkspaceModel::isDefaultVirgin() const
{
    return false; //m_manager->isFactoryDefaultWorkspace(); // TODO
}

void WorkspaceModel::resetWorkspaces()
{
    beginResetModel();
    m_sortedWorkspaces = m_manager->workspaces();
    endResetModel();
}

void WorkspaceModel::newWorkspace(QWidget *parent)
{
    WorkspaceNameInputDialog workspaceInputDialog(m_manager, parent);
    workspaceInputDialog.setWindowTitle(tr("New Workspace Name"));
    workspaceInputDialog.setActionText(tr("&Create"), tr("Create and &Open"));

    runWorkspaceNameInputDialog(&workspaceInputDialog, [this](const QString &newName) {
        m_manager->createWorkspace(newName);
    });
}

void WorkspaceModel::cloneWorkspace(QWidget *parent, const QString &workspace)
{
    WorkspaceNameInputDialog workspaceInputDialog(m_manager, parent);
    workspaceInputDialog.setWindowTitle(tr("New Workspace Name"));
    workspaceInputDialog.setActionText(tr("&Clone"), tr("Clone and &Open"));
    workspaceInputDialog.setValue(workspace + " (2)");

    runWorkspaceNameInputDialog(&workspaceInputDialog, [this, workspace](const QString &newName) {
        m_manager->cloneWorkspace(workspace, newName);
    });
}

void WorkspaceModel::deleteWorkspaces(const QStringList &workspaces)
{
    if (!m_manager->confirmWorkspaceDelete(workspaces))
        return;
    beginResetModel();
    m_manager->deleteWorkspaces(workspaces);
    endResetModel();
}

void WorkspaceModel::renameWorkspace(QWidget *parent, const QString &workspace)
{
    WorkspaceNameInputDialog workspaceInputDialog(m_manager, parent);
    workspaceInputDialog.setWindowTitle(tr("Rename Workspace"));
    workspaceInputDialog.setActionText(tr("&Rename"), tr("Rename and &Open"));
    workspaceInputDialog.setValue(workspace);

    runWorkspaceNameInputDialog(&workspaceInputDialog, [this, workspace](const QString &newName) {
        m_manager->renameWorkspace(workspace, newName);
    });
}

void WorkspaceModel::switchToWorkspace(const QString &workspace)
{
    m_manager->openWorkspace(workspace);
    emit workspaceSwitched();
}

void WorkspaceModel::runWorkspaceNameInputDialog(WorkspaceNameInputDialog *workspaceInputDialog,
                                                 std::function<void(const QString &)> createWorkspace)
{
    if (workspaceInputDialog->exec() == QDialog::Accepted) {
        QString newWorkspace = workspaceInputDialog->value();
        if (newWorkspace.isEmpty() || m_manager->workspaces().contains(newWorkspace))
            return;
        beginResetModel();
        createWorkspace(newWorkspace);
        m_sortedWorkspaces = m_manager->workspaces();
        endResetModel();

        if (workspaceInputDialog->isSwitchToRequested())
            switchToWorkspace(newWorkspace);
        emit workspaceCreated(newWorkspace);
    }
}

} // namespace ADS