/* Copyright (C) 2018
 * swift project Community / Contributors
 *
 * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
 * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
 * including this file, may be copied, modified, propagated, or distributed except according to the terms
 * contained in the LICENSE file.
 */

// Drag and drop docu:
// http://doc.qt.io/qt-5/model-view-programming.html#using-drag-and-drop-with-item-views

//#include "blackgui/models/columnformatters.h"
#include "blackgui/models/listmodelbasenontemplate.h"
//#include "blackgui/models/allmodelcontainers.h"
//#include "blackgui/guiutility.h"
//#include "blackmisc/compare.h"
//#include "blackmisc/predicates.h"
//#include "blackmisc/propertyindex.h"
//#include "blackmisc/fileutils.h"
//#include "blackmisc/sequence.h"
//#include "blackmisc/variant.h"
#include "blackmisc/verify.h"
//#include "blackmisc/worker.h"

//#include <QFlags>
//#include <QJsonDocument>
//#include <QList>
//#include <QMimeData>
//#include <QtGlobal>
//#include <QFileInfo>

using namespace BlackMisc;

namespace BlackGui
{
    namespace Models
    {
        int CListModelBaseNonTemplate::columnCount(const QModelIndex &modelIndex) const
        {
            Q_UNUSED(modelIndex);
            int c = m_columns.size();
            return c;
        }

        QVariant CListModelBaseNonTemplate::headerData(int section, Qt::Orientation orientation, int role) const
        {
            if (orientation != Qt::Horizontal) { return QVariant(); }
            const bool handled = (role == Qt::DisplayRole || role == Qt::ToolTipRole || role == Qt::InitialSortOrderRole);
            if (!handled) { return QVariant(); }
            if (section < 0 || section >= m_columns.size()) { return QVariant(); }

            if (role == Qt::DisplayRole)
            {
                return QVariant(m_columns.at(section).getColumnName());
            }
            if (role == Qt::ToolTipRole)
            {
                return QVariant(m_columns.at(section).getColumnToolTip());
            }
            return QVariant();
        }

        QModelIndex CListModelBaseNonTemplate::index(int row, int column, const QModelIndex &parent) const
        {
            Q_UNUSED(parent);
            return QStandardItemModel::createIndex(row, column);
        }

        QModelIndex CListModelBaseNonTemplate::parent(const QModelIndex &child) const
        {
            Q_UNUSED(child);
            return QModelIndex();
        }

        CPropertyIndex CListModelBaseNonTemplate::columnToPropertyIndex(int column) const
        {
            return m_columns.columnToPropertyIndex(column);
        }

        int CListModelBaseNonTemplate::propertyIndexToColumn(const CPropertyIndex &propertyIndex) const
        {
            return m_columns.propertyIndexToColumn(propertyIndex);
        }

        CPropertyIndex CListModelBaseNonTemplate::modelIndexToPropertyIndex(const QModelIndex &index) const
        {
            return this->columnToPropertyIndex(index.column());
        }

        void CListModelBaseNonTemplate::sortByPropertyIndex(const CPropertyIndex &propertyIndex, Qt::SortOrder order)
        {
            const int column = this->propertyIndexToColumn(propertyIndex);
            this->sort(column, order);
        }

        bool CListModelBaseNonTemplate::setSortColumnByPropertyIndex(const CPropertyIndex &propertyIndex)
        {
            const int column = m_columns.propertyIndexToColumn(propertyIndex);
            if (m_sortColumn == column) { return false; } // not changed
            m_sortColumn = column;
            return true; // changed
        }

        bool CListModelBaseNonTemplate::setSorting(const CPropertyIndex &propertyIndex, Qt::SortOrder order)
        {
            const bool changedColumn = this->setSortColumnByPropertyIndex(propertyIndex);
            const bool changedOrder = (m_sortOrder == order);
            m_sortOrder = order;
            return changedColumn || changedOrder;
        }

        bool CListModelBaseNonTemplate::hasValidSortColumn() const
        {

            if (!(m_sortColumn >= 0 && m_sortColumn < m_columns.size())) { return false; }
            return m_columns.isSortable(m_sortColumn);
        }

        Qt::ItemFlags CListModelBaseNonTemplate::flags(const QModelIndex &index) const
        {
            Qt::ItemFlags f = QStandardItemModel::flags(index);
            if (!index.isValid()) { return f; }
            const bool editable = m_columns.isEditable(index);
            f = editable ? (f | Qt::ItemIsEditable) : (f & ~Qt::ItemIsEditable);

            // flags from formatter
            const CDefaultFormatter *formatter = m_columns.getFormatter(index);
            if (formatter) { f = formatter->flags(f, editable); }

            // drag and drop
            f = f | Qt::ItemIsDragEnabled | Qt::ItemIsDropEnabled;
            return f;
        }

        Qt::DropActions CListModelBaseNonTemplate::supportedDragActions() const
        {
            return isOrderable() ? Qt::CopyAction | Qt::MoveAction : Qt::CopyAction;
        }

        Qt::DropActions CListModelBaseNonTemplate::supportedDropActions() const
        {
            return m_dropActions;
        }

        QStringList CListModelBaseNonTemplate::mimeTypes() const
        {
            static const QStringList mimes({ "application/swift.container.json" });
            return mimes;
        }

        void CListModelBaseNonTemplate::markDestroyed()
        {
            m_modelDestroyed = true;
        }

        bool CListModelBaseNonTemplate::isModelDestroyed()
        {
            return m_modelDestroyed;
        }

        void CListModelBaseNonTemplate::clearHighlighting()
        {
            // can be overridden to delete highlighting
        }

        bool CListModelBaseNonTemplate::hasHighlightedRows() const
        {
            return false;
            // can be overridden to enable highlighting based operations
        }

        void CListModelBaseNonTemplate::emitDataChanged(int startRowIndex, int endRowIndex)
        {
            BLACK_VERIFY_X(startRowIndex <= endRowIndex, Q_FUNC_INFO, "check rows");
            BLACK_VERIFY_X(startRowIndex >= 0 &&  endRowIndex >= 0, Q_FUNC_INFO, "check rows");

            const int columns = columnCount();
            const int rows = rowCount();
            if (columns < 1) { return; }
            if (startRowIndex < 0) { startRowIndex = 0; }
            if (endRowIndex >= rows) { endRowIndex = rows - 1; }
            const QModelIndex topLeft(createIndex(startRowIndex, 0));
            const QModelIndex bottomRight(createIndex(endRowIndex, columns - 1));
            emit this->dataChanged(topLeft, bottomRight);
        }

        CListModelBaseNonTemplate::CListModelBaseNonTemplate(const QString &translationContext, QObject *parent)
            : QStandardItemModel(parent), m_columns(translationContext), m_sortColumn(-1), m_sortOrder(Qt::AscendingOrder)
        {
            // non unique default name, set translation context as default
            this->setObjectName(translationContext);

            // connect
            connect(this, &CListModelBaseNonTemplate::dataChanged, this, &CListModelBaseNonTemplate::onDataChanged);
        }

    } // namespace
} // namespace