/*
  TaskModelAdapter.h

  This file is part of Charm, a task-based time tracking application.

  Copyright (C) 2007-2019 Klar√§lvdalens Datakonsult AB, a KDAB Group company, info@kdab.com

  Author: Mirko Boehm <mirko.boehm@kdab.com>
  Author: Frank Osterfeld <frank.osterfeld@kdab.com>

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef TASKMODELADAPTER_H
#define TASKMODELADAPTER_H

#include <QAbstractItemModel>
#include <QPointer>

#include "Core/TaskModelInterface.h"
#include "Core/CharmDataModel.h"
#include "Core/CharmDataModelAdapterInterface.h"
#include "Core/CommandEmitterInterface.h"

enum ViewColumns {
    Column_TaskId, // FIXME rename
    Column_TaskColumnCount
};

enum TasksViewRoles {
    TasksViewRole_Name = 0x1045F132,
    TasksViewRole_RunningTime,
    TasksViewRole_UserComment,
    TasksViewRole_TaskId,
    TasksViewRole_Filter, ///< Role for search/filter
    TasksViewRole_TaskDescription = Qt::ToolTipRole
};

typedef ViewColumns ViewColumn;

/** TaskModelAdapter adapts the CharmDataModel to be used in the task view
    (in main view and "select task" dialog).

    It is a QAbstractItemModel, and stores the TaskTreeItem pointer of
    the respective address in the model indexes internal pointer.
*/
class TaskModelAdapter : public QAbstractItemModel, public TaskModelInterface,
    public CommandEmitterInterface, public CharmDataModelAdapterInterface
{
    Q_OBJECT

public:
    explicit TaskModelAdapter(CharmDataModel *parent);
    ~TaskModelAdapter() override;

    // reimplement QAbstractItemModel:
    int columnCount(const QModelIndex &parent = QModelIndex()) const override;
    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
    QModelIndex index(int row, int column,
                      const QModelIndex &parent = QModelIndex()) const override;
    QModelIndex parent(const QModelIndex &index) const override;
    // QVariant headerData( int section, Qt::Orientation orientation, int role = Qt::DisplayRole ) const;
    Qt::ItemFlags flags(const QModelIndex &index) const override;
    bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole) override;

    // reimplement CharmDataModelAdapterInterface:
    void resetTasks() override;
    void taskAboutToBeAdded(TaskId parent, int pos) override;
    void taskAdded(TaskId id) override;
    void taskModified(TaskId id) override;
    void taskParentChanged(TaskId task, TaskId oldParent, TaskId newParent) override;
    void taskAboutToBeDeleted(TaskId) override;
    void taskDeleted(TaskId id) override;

    void resetEvents() override
    {
    }

    void eventAboutToBeAdded(EventId) override
    {
    }

    void eventAdded(EventId) override;
    void eventModified(EventId, Event) override;
    void eventAboutToBeDeleted(EventId) override
    {
    }

    void eventDeleted(EventId) override;

    void eventActivated(EventId id) override;
    void eventDeactivated(EventId id) override;

    // reimplement TaskModelInterface:
    Task taskForIndex(const QModelIndex &) const override;
    QModelIndex indexForTaskId(TaskId) const override;
    bool taskIsActive(const Task &task) const override;
    bool taskHasChildren(const Task &task) const override;
    bool taskIdExists(TaskId taskId) const override;
    TaskList children(const Task &task) const;

    // reimplement CommandEmitterInterface:
    void commitCommand(CharmCommand *) override;

Q_SIGNALS:
    void eventActivationNotice(EventId id) override;
    void eventDeactivationNotice(EventId id) override;

private:
    const TaskTreeItem *itemFor(const QModelIndex &) const;
    QModelIndex indexForTaskTreeItem(const TaskTreeItem &item, int column = 0) const;

    QPointer<CharmDataModel> m_dataModel;
};

#endif
