#include "CVrFFMediaPusher.h"
#include "VrError.h"
#include "VrLog.h"

#include <chrono>

#if !defined(FFMEDIA_PLATFORM_DUMMY)
#include <linux/videodev2.h>
#endif

bool IVrFFMediaPusher::CreateObject(IVrFFMediaPusher** ppPusher)
{
    if (!ppPusher) return false;
    try { *ppPusher = new CVrFFMediaPusher(); return true; }
    catch (...) { return false; }
}

CVrFFMediaPusher::CVrFFMediaPusher() = default;

CVrFFMediaPusher::~CVrFFMediaPusher()
{
    try { UnInit(); } catch (...) {}
}

#if defined(FFMEDIA_PLATFORM_DUMMY)

// =================== Windows / 非 RK3588 占位实现 ===================
// 实际编码/推流仅在 RK3588 + ffmedia_release 下可用
// Windows 仅保证编译通过和接口存在

int CVrFFMediaPusher::Init(const VrFFPushConfig& config)
{
    std::lock_guard<std::mutex> lk(m_mutex);
    m_config = config;
    m_bInited = true;
    LOG_INFO("FFMediaPusher: Init (dummy on this platform)\n");
    return SUCCESS;
}

int CVrFFMediaPusher::Start()
{
    if (!m_bInited.load()) return ERR_CODE(DEV_NO_OPEN);
    m_bStarted = true;
    LOG_INFO("FFMediaPusher: Start (dummy)\n");
    return SUCCESS;
}

int CVrFFMediaPusher::PushFrame(const void* /*data*/, size_t /*size*/, int64_t /*ptsUs*/)
{
    return m_bStarted.load() ? SUCCESS : ERR_CODE(DEV_NO_OPEN);
}

int CVrFFMediaPusher::Stop()
{
    m_bStarted = false;
    return SUCCESS;
}

int CVrFFMediaPusher::UnInit()
{
    Stop();
    m_bInited = false;
    return SUCCESS;
}

#else

// =================== RK3588 真正实现 ===================

static uint32_t ToV4l2Pix(EFFPushPixelFormat fmt)
{
    switch (fmt)
    {
    case EFFPushPixelFormat::NV12:    return V4L2_PIX_FMT_NV12;
    case EFFPushPixelFormat::YUV420P: return V4L2_PIX_FMT_YUV420;
    case EFFPushPixelFormat::BGR24:   return V4L2_PIX_FMT_BGR24;
    case EFFPushPixelFormat::RGB24:   return V4L2_PIX_FMT_RGB24;
    case EFFPushPixelFormat::BGRA32:  return V4L2_PIX_FMT_BGR32;
    case EFFPushPixelFormat::RGBA32:  return V4L2_PIX_FMT_RGBA32;
    }
    return V4L2_PIX_FMT_NV12;
}

static EncodeType ToFFEncode(EFFEncodeType t)
{
    switch (t)
    {
    case EFFEncodeType::H264:  return ENCODE_TYPE_H264;
    case EFFEncodeType::H265:  return ENCODE_TYPE_H265;
    case EFFEncodeType::MJPEG: return ENCODE_TYPE_MJPEG;
    }
    return ENCODE_TYPE_H264;
}

int CVrFFMediaPusher::Init(const VrFFPushConfig& config)
{
    std::lock_guard<std::mutex> lk(m_mutex);
    if (m_bInited.load()) return SUCCESS;

    m_config = config;

    const uint32_t inPix = ToV4l2Pix(config.pixelFormat);
    const bool needRga = (config.pixelFormat != EFFPushPixelFormat::NV12);

    // 1) 内存输入源
    ImagePara inPara(config.width, config.height, config.width, config.height, inPix);
    m_memReader = std::make_shared<ModuleMemReader>(inPara);
    if (m_memReader->init() != 0)
    {
        LOG_ERROR("FFMediaPusher: memReader init fail\n");
        return ERR_CODE(DEV_OPEN_ERR);
    }

    // 2) （可选）RGA 转 NV12
    std::shared_ptr<ModuleMedia> encInput = m_memReader;
    if (needRga)
    {
        ImagePara nv12Para(config.width, config.height, config.width, config.height, V4L2_PIX_FMT_NV12);
        m_rga = std::make_shared<ModuleRga>(inPara, nv12Para, RGA_ROTATE_NONE);
        m_rga->setProductor(m_memReader);
        if (m_rga->init() != 0)
        {
            LOG_ERROR("FFMediaPusher: rga init fail\n");
            return ERR_CODE(DEV_OPEN_ERR);
        }
        encInput = m_rga;
    }

    // 3) MPP 硬件编码
    m_encoder = std::make_shared<ModuleMppEnc>(
        ToFFEncode(config.encodeType),
        config.fps,
        config.gop,
        config.bitrateKbps,
        (config.rcMode == EFFRcMode::CBR) ? ENCODE_RC_MODE_CBR : ENCODE_RC_MODE_VBR,
        ENCODE_QUALITY_BEST,
        ENCODE_PROFILE_HIGH
    );
    m_encoder->setProductor(encInput);
    m_encoder->setDuration(1000000 / std::max<uint32_t>(1, config.fps));
    if (m_encoder->init() != 0)
    {
        LOG_ERROR("FFMediaPusher: encoder init fail\n");
        return ERR_CODE(DEV_OPEN_ERR);
    }

    // 4) RTSP 推流
    m_rtspServer = std::make_shared<ModuleRtspServer>(config.rtspPath.c_str(), config.rtspPort);
    if (!config.authUser.empty())
    {
        m_rtspServer->setAuthInfo(config.authRealm, config.authUser, config.authPass);
    }
    m_rtspServer->setProductor(m_encoder);
    if (m_rtspServer->init() != 0)
    {
        LOG_ERROR("FFMediaPusher: rtsp server init fail\n");
        return ERR_CODE(DEV_OPEN_ERR);
    }

    m_bInited = true;
    return SUCCESS;
}

int CVrFFMediaPusher::Start()
{
    if (!m_bInited.load()) return ERR_CODE(DEV_NO_OPEN);
    if (m_bStarted.load()) return SUCCESS;
    if (!m_memReader) return ERR_CODE(DEV_CTRL_ERR);

    m_memReader->start();
    m_bStarted = true;
    return SUCCESS;
}

int CVrFFMediaPusher::PushFrame(const void* data, size_t size, int64_t ptsUs)
{
    if (!m_bStarted.load()) return ERR_CODE(DEV_NO_OPEN);
    if (!m_memReader) return ERR_CODE(DEV_CTRL_ERR);

    if (ptsUs == 0)
    {
        auto now = std::chrono::steady_clock::now().time_since_epoch();
        ptsUs = std::chrono::duration_cast<std::chrono::microseconds>(now).count();
    }
    m_lastPtsUs = ptsUs;

    int ret = m_memReader->setInputBuffer(const_cast<void*>(data), size, -1, ptsUs);
    if (ret != 0)
    {
        LOG_DEBUG("FFMediaPusher: setInputBuffer fail %d\n", ret);
        return ret;
    }
    m_memReader->waitProcess(2000);
    return SUCCESS;
}

int CVrFFMediaPusher::Stop()
{
    if (!m_bStarted.load()) return SUCCESS;
    if (m_memReader)
    {
        m_memReader->setProcessStatus(ModuleMemReader::PROCESS_STATUS_EXIT);
        m_memReader->stop();
    }
    m_bStarted = false;
    return SUCCESS;
}

int CVrFFMediaPusher::UnInit()
{
    Stop();
    std::lock_guard<std::mutex> lk(m_mutex);
    m_rtspServer.reset();
    m_encoder.reset();
    m_rga.reset();
    m_memReader.reset();
    m_bInited = false;
    return SUCCESS;
}

#endif // FFMEDIA_PLATFORM_DUMMY

std::string CVrFFMediaPusher::GetRtspUrl(const std::string& localIp) const
{
    char buf[256];
    snprintf(buf, sizeof(buf), "rtsp://%s:%u%s",
             localIp.c_str(), m_config.rtspPort, m_config.rtspPath.c_str());
    return std::string(buf);
}