/*
 * locatorwidget.h
 * Copyright 2020, Thorbjørn Lindeijer <bjorn@lindeijer.nl>
 *
 * This file is part of Tiled.
 *
 * 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/>.
 */

#pragma once

#include <QAbstractListModel>
#include <QFrame>

#include "projectmodel.h"

class QAbstractItemDelegate;
class QStyledItemDelegate;

namespace Tiled {

class FilterEdit;
class FileMatchDelegate;
class ResultsView;

/**
 * Interface for providing a source of locator items based on filter words.
*/
class LocatorSource : public QAbstractListModel
{ 
public:
    explicit LocatorSource(QObject *parent = nullptr)
        : QAbstractListModel(parent)
    {}

    virtual QAbstractItemDelegate *delegate() const = 0;
    virtual QString placeholderText() const = 0;
    virtual void setFilterWords(const QStringList &words) = 0;
    virtual void activate(const QModelIndex &index) = 0;
};

class LocatorWidget : public QFrame
{
    Q_OBJECT

public:
    explicit LocatorWidget(LocatorSource *locatorSource,
                           QWidget *parent = nullptr);
    void setVisible(bool visible) override;

private:
    void setFilterText(const QString &text);

    LocatorSource *mLocatorSource;
    FilterEdit *mFilterEdit;
    ResultsView *mResultsView;
};

class FileLocatorSource : public LocatorSource
{
public:
    explicit FileLocatorSource(QObject *parent = nullptr);

    int rowCount(const QModelIndex &parent) const override;
    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;

    // LocatorSource
    QAbstractItemDelegate *delegate() const override;
    QString placeholderText() const override;
    void setFilterWords(const QStringList &words) override;
    void activate(const QModelIndex &index) override;

private:
    FileMatchDelegate *mDelegate;
    QVector<ProjectModel::Match> mMatches;
};

class TileLocatorSource : public LocatorSource
{
    Q_OBJECT

public:
    explicit TileLocatorSource(QObject *parent = nullptr);

    int rowCount(const QModelIndex &parent) const override;
    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;

    // LocatorSource
    QAbstractItemDelegate *delegate() const override;
    QString placeholderText() const override;
    void setFilterWords(const QStringList &words) override;
    void activate(const QModelIndex &index) override;

private:
    QStyledItemDelegate *mDelegate;
    bool mHasValidCoord = false;
    int mTileX = 0;
    int mTileY = 0;
};

} // namespace Tiled
