#pragma once
#include <QObject>
#include <QString>
#include <QMutex>
#include <QWidget>
// 避免 ssize_t 引发的错误 
#if defined(_MSC_VER)
#include <basetsd.h>
typedef SSIZE_T ssize_t;
#endif
#include <vlc/vlc.h>



class VideoPlayer :public QObject
{
	Q_OBJECT
public:
	//播放状态
	typedef enum state {
		Idle,
		Opening,
		Buffering,
		Playing,
		Paused,
		Stopped,
		Ended,
		Error
	} State;
	static VideoPlayer& getInstance();
	static void release();

	void setVideoWindow(QWidget* window);
	VideoPlayer::State state();
	friend  void handleEvents(const libvlc_event_t* event, void* userData);
	QString getTitle() const {
		return titlestr;
	}
	int64_t getDur() const {
		return dur;
	}
	int getSeek();

signals:
	void durationChanged(qint64 dur);
	void timeChanged(qint64 time);
	void positionChanged(float pos);
	void stateChanged(VideoPlayer::State state);
	void xb_libvlc_wrong(QString msg);
public slots:
	void openFile(const QString& file);
	void setVolume(int vol);//设置音量
	void seek(int pos);//跳播
	void play();//播放
	void pause();//暂停
	void stop();//停止

private:
	explicit VideoPlayer(QObject* parent = nullptr);
	~VideoPlayer();
	VideoPlayer(const VideoPlayer& other) = delete;
	VideoPlayer& operator=(const VideoPlayer& other) = delete;
	void attachEvents();//订阅事件
public:
	QWidget* m_videoWindow = nullptr;
private:
	QString titlestr;
	int64_t dur;
	libvlc_instance_t* m_instance = nullptr;
	libvlc_media_player_t* m_player = nullptr;
	libvlc_media_t* media = nullptr;
	libvlc_event_manager_t* m_eventManager = nullptr;
	VideoPlayer::State m_state = VideoPlayer::State::Idle;
};