/***************************************************************************************
 *
 *  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
 *
 *  By downloading, copying, installing or using the software you agree to this license.
 *  If you do not agree to this license, do not download, install, 
 *  copy or use the software.
 *
 *  Copyright (C) 2014-2024, Happytimesoft Corporation, all rights reserved.
 *
 *  Redistribution and use in binary forms, with or without modification, are permitted.
 *
 *  Unless required by applicable law or agreed to in writing, software distributed 
 *  under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
 *  CONDITIONS OF ANY KIND, either express or implied. See the License for the specific
 *  language governing permissions and limitations under the License.
 *
****************************************************************************************/

#include "http_flv_player.h"
#include "utils.h"

/***************************************************************************************/

int http_flv_notify_callback(int evt, void * puser)
{
    CHttpFlvPlayer * pPlayer = (CHttpFlvPlayer *) puser;
    
    pPlayer->onNotify(evt);
    return 0;
}

int http_flv_audio_callback(uint8 * pdata, int len, uint32 ts, void *puser)
{
    CHttpFlvPlayer * pPlayer = (CHttpFlvPlayer *) puser;

    pPlayer->onAudio(pdata, len, ts);
    return 0;
}

int http_flv_video_callback(uint8 * pdata, int len, uint32 ts, void *puser)
{
    CHttpFlvPlayer * pPlayer = (CHttpFlvPlayer *) puser;

    pPlayer->onVideo(pdata, len, ts);
    return 0;
}

/***************************************************************************************/

CHttpFlvPlayer::CHttpFlvPlayer(): CVideoPlayer()
{
    memset(m_ip, 0, sizeof(m_ip));
}

CHttpFlvPlayer::~CHttpFlvPlayer()
{
    close();
}
std::string CHttpFlvPlayer::createNewFLVUrl(const std::string& username,
    const std::string& password,
    const std::string& url) {
    // Copy the original strings to avoid modifying the originals
    std::string modUsername = username;
    std::string modPassword = password;

    // Replace '@' with '_' in username and password
    std::replace(modUsername.begin(), modUsername.end(), '@', '_');
    std::replace(modPassword.begin(), modPassword.end(), '@', '_');

    // Extract the protocol and rest of the URL
    size_t protocolEndPos = url.find("://") + 3; // Find the position right after "://"
    std::string protocol = url.substr(0, protocolEndPos); // Include "://"

    // Construct the new URL with modified credentials
    std::string newUrl = protocol;
    newUrl += modUsername + ":" + modPassword + "@";
    newUrl += url.substr(protocolEndPos);
    return newUrl;
}
BOOL CHttpFlvPlayer::open(std::string fileName)
{
    close();

    CVideoPlayer::open(fileName);

    char host[100];

    url_split(fileName.c_str(), NULL, 0, NULL, 0, NULL, 0, host, sizeof(host), NULL, NULL, 0);

    if (host[0] == '\0')
    {
        return FALSE;
    }

	strncpy(m_ip, host, sizeof(m_ip) - 1);

	m_httpflv.set_notify_cb(http_flv_notify_callback, this);
    m_httpflv.set_audio_cb(http_flv_audio_callback);
    m_httpflv.set_video_cb(http_flv_video_callback);

	return TRUE;
}

BOOL CHttpFlvPlayer::open(std::string _username, std::string _password, std::string _url)
{
    close();
    CVideoPlayer::open(_username, _password, _url);
    char host[100];
    std::string fileName = createNewFLVUrl(_username, _password, _url);
    url_split(fileName.c_str(), NULL, 0, NULL, 0, NULL, 0, host, sizeof(host), NULL, NULL, 0);

    if (host[0] == '\0')
    {
        return FALSE;
    }

    strncpy(m_ip, host, sizeof(m_ip) - 1);
    m_httpflv.set_notify_cb(http_flv_notify_callback, this);
    m_httpflv.set_audio_cb(http_flv_audio_callback);
    m_httpflv.set_video_cb(http_flv_video_callback);

    return TRUE;
}

void  CHttpFlvPlayer::setBbox(cv::Rect bbox) {
    CVideoPlayer::setBbox(bbox);
}
void  CHttpFlvPlayer::setCrop(bool crop) {
    CVideoPlayer::setCrop(crop);
}
void CHttpFlvPlayer::close()
{
	// stop http-flv connection
	m_httpflv.http_flv_stop();
	m_httpflv.http_flv_close();

    m_bPlaying = FALSE;
    m_bPaused = FALSE;
    CVideoPlayer::StopVideoDecoder();

    CVideoPlayer::close();
}

BOOL CHttpFlvPlayer::play()
{
	if (m_httpflv.http_flv_start(m_sFileName.c_str(), m_acct.c_str(), m_pass.c_str()))
    {
        m_bPlaying = TRUE;
        m_bPaused = FALSE;
    }
    CVideoPlayer::StartVideoDecoder();// Start the video decoder

    return m_bPlaying;
}

void CHttpFlvPlayer::stop()
{
    if (m_bPlaying || m_bPaused)
    {
        m_httpflv.http_flv_stop();
    }
    // Set flags BEFORE stopping decoder so rx thread stops calling decode()
    m_bPlaying = FALSE;
    m_bPaused = FALSE;
    CVideoPlayer::StopVideoDecoder(); // Stop the video decoder

}

BOOL CHttpFlvPlayer::pause()
{
    if (m_bPlaying)
    {
        if (m_httpflv.http_flv_pause())
        {
            m_bPaused = TRUE;
            m_bPlaying = FALSE;
        }
    }
    else if (m_bPaused)
    {
        if (m_httpflv.http_flv_play())
        {
            m_bPaused = FALSE;
            m_bPlaying = TRUE;
        }
    }
    CVideoPlayer::StopVideoDecoder(); // Stop the video decoder

    return m_bPaused;
}

BOOL CHttpFlvPlayer::seek(int pos)
{
    return FALSE;
}

int64 CHttpFlvPlayer::getElapse()
{
    uint32 cur_ts;
    uint32 init_ts;
    int frequency;
    
    if (m_videoClock.SyncTime.tv_sec > m_audioClock.SyncTime.tv_sec)
    {
        cur_ts = m_videoClock.SyncTimestamp;
        init_ts = m_httpflv.get_video_init_ts();
        frequency = getVideoClock();
    }
    else if (m_videoClock.SyncTime.tv_sec == m_audioClock.SyncTime.tv_sec && 
        m_videoClock.SyncTime.tv_usec > m_audioClock.SyncTime.tv_usec)
    {
        cur_ts = m_videoClock.SyncTimestamp;
        init_ts = m_httpflv.get_video_init_ts();
        frequency = getVideoClock();
    }
    else 
    {
        cur_ts = m_audioClock.SyncTimestamp;
        init_ts = m_httpflv.get_audio_init_ts();
        frequency = getAudioClock();
    }
    
    if (init_ts == 0)
    {
        return 0;
    }

    int64 elapse;
    int timestampDiff = cur_ts - init_ts;

    // Divide this by the timestamp frequency to get real time:
    double timeDiff = timestampDiff / (double)frequency;

    if (timeDiff >= 0.0) 
    {
        elapse = timeDiff * 1000;
    } 
    else 
    {
        timeDiff = -timeDiff;
        elapse = timeDiff * 1000;
    }
    
    return elapse;
}

int64 CHttpFlvPlayer::getDuration()
{
    return 0;
}

int CHttpFlvPlayer::getVideoCodec()
{
    return m_httpflv.video_codec();
}

int CHttpFlvPlayer::getAudioCodec()
{
    return m_httpflv.audio_codec();
}

void CHttpFlvPlayer::onNotify(int evt)
{
	if (evt == HTTP_FLV_EVE_VIDEOREADY)
	{
		int videoCodec = m_httpflv.video_codec();

        if (VIDEO_CODEC_NONE != videoCodec)
		{
			openVideo(videoCodec);
		}
	}
	else if (evt == HTTP_FLV_EVE_AUDIOREADY)
	{
		int audioCodec = m_httpflv.audio_codec();

		if (AUDIO_CODEC_NONE != audioCodec)
		{
			openAudio(audioCodec, m_httpflv.get_audio_samplerate(), m_httpflv.get_audio_channels());
		}
	}
}

void CHttpFlvPlayer::onAudio(uint8 * pdata, int len, uint32 ts)
{
    playAudio(pdata, len, ts, 0);
}

void CHttpFlvPlayer::onVideo(uint8 * pdata, int len, uint32 ts)
{
    playVideo(pdata, len, ts, 0);
}

BOOL CHttpFlvPlayer::onRecord()
{
    CHttpFlvClient * p_httpflv = &m_httpflv;
    AVICTX * p_avictx = m_pAviCtx;
    
    int vcodec = p_httpflv->video_codec();	
    int fps = p_httpflv->get_video_framerate();
    int v_extra_len = 0;
    uint8 v_extra[1024];
    
    if (VIDEO_CODEC_H264 == vcodec)
    {
        avi_set_video_info(p_avictx, fps, 0, 0, "H264");

        uint8 sps[512], pps[512];
		int sps_len = 0, pps_len = 0;
        
        if (p_httpflv->get_h264_params(sps, &sps_len, pps, &pps_len))
        {
            memcpy(v_extra, sps, sps_len);
            memcpy(v_extra + sps_len, pps, pps_len);

            v_extra_len = sps_len + pps_len;
        }

        if (v_extra_len > 0)
        {
			avi_set_video_extra_info(p_avictx, v_extra, v_extra_len);
        }
    }
    else if (VIDEO_CODEC_H265 == vcodec)
    {
        avi_set_video_info(p_avictx, fps, 0, 0, "H265");

        uint8 vps[512], sps[512], pps[512];
        int vps_len = 0, sps_len = 0, pps_len = 0;
            
        if (p_httpflv->get_h265_params(sps, &sps_len, pps, &pps_len, vps, &vps_len))
        {
            memcpy(v_extra, vps, vps_len);
            memcpy(v_extra + vps_len, sps, sps_len);
            memcpy(v_extra + vps_len + sps_len, pps, pps_len);

            v_extra_len = vps_len + sps_len + pps_len;
        }

        if (v_extra_len > 0)
        {
			avi_set_video_extra_info(p_avictx, v_extra, v_extra_len);
        }
    }
    else if (VIDEO_CODEC_JPEG == vcodec)
    {
        avi_set_video_info(p_avictx, fps, 0, 0, "JPEG");
    }
    else if (VIDEO_CODEC_MP4 == vcodec)
    {
        avi_set_video_info(p_avictx, fps, 0, 0, "MP4V");
    }

    int acodec = p_httpflv->audio_codec();
    int sr = p_httpflv->get_audio_samplerate();
    int ch = p_httpflv->get_audio_channels();
	    
    if (AUDIO_CODEC_G711A == acodec)
    {
        avi_set_audio_info(p_avictx, ch, sr, AUDIO_FORMAT_ALAW);
    }
    else if (AUDIO_CODEC_G711U == acodec)
    {
        avi_set_audio_info(p_avictx, ch, sr, AUDIO_FORMAT_MULAW);
    }
    else if (AUDIO_CODEC_G726 == acodec)
    {
        avi_set_audio_info(p_avictx, ch, sr, AUDIO_FORMAT_G726);
    }
    else if (AUDIO_CODEC_G722 == acodec)
    {
        avi_set_audio_info(p_avictx, ch, sr, AUDIO_FORMAT_G722);
    }
    else if (AUDIO_CODEC_AAC == acodec)
    {
        avi_set_audio_info(p_avictx, ch, sr, AUDIO_FORMAT_AAC);
        avi_set_audio_extra_info(p_avictx, p_httpflv->get_audio_config(), p_httpflv->get_audio_config_len());
    }

    avi_update_header(p_avictx);

    if (p_avictx->ctxf_video)
    {
        if (v_extra_len > 0)
        {
            recordVideo(v_extra, v_extra_len, 0, 0);
        }
    }
    
	return TRUE;
}