#ifndef GAME_AUDIOPLAYER_H
#define GAME_AUDIOPLAYER_H

#include <dpmi.h>

#include "Audio.h"
#include "Music.h"
#include "rad20player.h"

#define SB_BUFFER_SIZE 1024
#define SB_BUFFERS 32

#define AUDIO_CHANNELS 8
#define AUDIO_MAX_PRIORITY 7

#define AUDIO_PLAY_LOOP 0x01
#define AUDIO_PLAY_FIXED_PRIORITY 0x02

class AudioPlayer {
public:
    AudioPlayer();

    ~AudioPlayer();

    void playMusic(Music &music);

    void stopMusic();

    void pauseMusic();

    void resumeMusic();

    void playAudio(Audio &audio, int priority, int flags = 0);

    bool isPlaying(const Audio & audio);

    void stopAudio(Audio &audio);

    void stopAllAudio();


private:
    friend class Music;
    friend void radPlayerWriteReg(void *p, uint16_t reg, uint8_t data);
    friend void audioPlayerOnTimer();

    RADPlayer _musicPlayer;
    Music *_currentMusic{nullptr};
    bool _paused{true};
    uint16_t _oplReg{0x388};
    _go32_dpmi_seginfo _dmaBuffer{};
    uint8_t (*_buffers)[SB_BUFFER_SIZE]{};
    uint8_t _dmaPage{0};
    uint16_t _dmaOffset{0};
    unsigned _nextBufferReadIndex{0};
    unsigned _nextBufferWriteIndex{0};

    struct {
        Audio *audio{nullptr};
        bool loop{false};
    } _channels[AUDIO_CHANNELS];

    [[nodiscard]] bool isPlaying(const Music &music) const;
    void writeOpl(uint16_t reg, uint8_t data) const;
    void onTimer();

    void generateSamples();

    void copySamples();
};

extern AudioPlayer audioPlayer;

#endif //GAME_AUDIOPLAYER_H