// SPDX-FileCopyrightText: 2022 UnionTech Software Technology Co., Ltd.
//
// SPDX-License-Identifier: GPL-3.0-or-later

#ifndef _DMR_Platform_PLAYLIST_WIDGET_H
#define _DMR_Platform_PLAYLIST_WIDGET_H

#include <DPlatformWindowHandle>
#include <QPushButton>
#include <QtWidgets>
#include <DIconButton>
#include <DFloatingButton>
#include <DListWidget>
#include <DGuiApplicationHelper>
#include <DFontSizeManager>
#include <QBrush>
#include <DStyle>
#include <DLabel>
#include <DTextEdit>
#include <QPainterPath>
#include <QSvgWidget>

namespace Dtk {
namespace Widget {
class DImageButton;
}
}

DWIDGET_USE_NAMESPACE

namespace dmr {

class PlayerEngine;
class Platform_MainWindow;
class Platform_ListPic: public QLabel
{
    Q_OBJECT
public:
    Platform_ListPic(QPixmap pic, QWidget *parent): QLabel(parent)
    {
        setFixedSize(QSize(42, 24));
        _pic = pic;
    }
    void setPic(QPixmap pic)
    {
        _pic = pic;
    }
protected:
    void paintEvent(QPaintEvent *pe) override
    {
        QPainter painter(this);
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
        painter.setRenderHints(QPainter::HighQualityAntialiasing | QPainter::SmoothPixmapTransform |
                             QPainter::Antialiasing);
#else
        painter.setRenderHints(QPainter::SmoothPixmapTransform |
                             QPainter::Antialiasing);
#endif
        QSize size(_pic.size());
        QBitmap mask(size);
        QPainter painter1(&mask);
        painter1.setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
        painter1.fillRect(mask.rect(), Qt::white);
        painter1.setBrush(QColor(0, 0, 0));
        painter1.drawRoundedRect(mask.rect(), 5, 5);
        QPixmap image = _pic;
        image.setMask(mask);

        painter.setClipping(true);
        QPainterPath bg0;
        bg0.addRoundedRect(rect(), 5, 5);   //使用5个像素点，圆角效果更好
        painter.setClipPath(bg0);

        painter.drawPixmap(rect(), image);

        painter.setPen(
            QPen(DGuiApplicationHelper::instance()->applicationPalette().frameBorder().color(), 2));
        painter.setBrush(Qt::NoBrush);
        painter.drawRoundedRect(rect(), 5, 5);
    };
private:
    QPixmap _pic;
};

class Platform_PlayItemWidget;

class Platform_PlaylistWidget: public QWidget
{
    Q_OBJECT
public:
    enum State {
        Opened,
        Closed,
    };

    Platform_PlaylistWidget(QWidget *, PlayerEngine *);
    virtual ~Platform_PlaylistWidget();

    State state() const
    {
        return _state;
    }
    bool toggling() const
    {
        return _toggling;
    }
    DListWidget *get_playlist()
    {
        return _playlist;
    }
    void updateSelectItem(const int key);
    void clear();
    void endAnimation();
    bool isFocusInPlaylist();
    /**
     * @brief resetFocusAttribute
     * 重置键盘交互属性，确保置首条只有tab键交互生效
     *
     * @param atr true为执行，false为跳过
     */
    void resetFocusAttribute(bool &atr);
    /**
     * @brief 返回_engine
     * PlayItemWidget类中的文件url无效时，需要给用户提示。需要通过PlayerEngine给MainWindow发送信号
     * @return engine的指针
     */
    inline PlayerEngine *engine() noexcept{
        return _engine;
    }
signals:
    void stateChange(bool isShortcut);
    void sizeChange();

public slots:
    /**
     * @brief togglePopup
     * 播放列表升起/降下
     *
     * @param isShortcut 该函数是否通过快捷键触发
     */
    void togglePopup(bool isShortcut);
    void loadPlaylist();
    void openItemInFM();
    void showItemInfo();
    void removeClickedItem(bool isShortcut);
    void slotCloseTimeTimeOut();
    void slotCloseItem(QWidget *w);
    void slotDoubleClickedItem(QWidget *w);
    void slotRowsMoved();

protected:
    void contextMenuEvent(QContextMenuEvent *cme) override;
//    void dragEnterEvent(QDragEnterEvent *event) override;
//    void dragMoveEvent(QDragMoveEvent *event) override;
//    void dropEvent(QDropEvent *event) override;
    void showEvent(QShowEvent *se) override;
    void paintEvent(QPaintEvent *pe) override;
    void resizeEvent(QResizeEvent *ev) override;
    bool eventFilter(QObject *obj, QEvent *event) override;

protected slots:
    void updateItemStates();
    void updateItemInfo(int);
    void appendItems();
    void removeItem(int);
    void slotShowSelectItem(QListWidgetItem *);
    void OnItemChanged(QListWidgetItem *current, QListWidgetItem *previous);

private:
    PlayerEngine *_engine {nullptr};
    Platform_MainWindow *_mw {nullptr};
    QWidget *_mouseItem {nullptr};
    QWidget *_clickedItem {nullptr};
    QSignalMapper *_closeMapper {nullptr};
    QSignalMapper *_activateMapper {nullptr};
    DListWidget *_playlist {nullptr};
    State _state {Closed};
    DLabel *_num {nullptr};
    DLabel *_title {nullptr};
    /// < original row, data>
    QPair<int, Platform_PlayItemWidget *> _lastDragged {-1, nullptr};
    int _index {0};
    Platform_PlayItemWidget *pSelectItemWgt;
    void batchUpdateSizeHints();

    QPropertyAnimation *paOpen ;
    QPropertyAnimation *paClose ;
    DPushButton *m_pClearButton;

    bool _toggling {false};
    bool m_bButtonFocusOut {false};       ///键盘交互标志位
};
}

#endif /* ifndef _DMR_Platform_PLAYLIST_WIDGET_H */
