/*
 * Copyright (C) 2025 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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 <arpa/inet.h>
#include <sys/time.h>
#include <utility>
#include "iconsumer_surface.h"
#include "native_buffer_inner.h"
#include "softvideoenc_api11_sample.h"
using namespace OHOS;
using namespace OHOS::Media;
using namespace std;
namespace {
constexpr int64_t NANOS_IN_SECOND = 1000000000L;
constexpr int64_t NANOS_IN_MICRO = 1000L;
constexpr uint32_t DEFAULT_BITRATE = 10000000;
constexpr uint32_t FRAME_INTERVAL = 16666;
VEncAPI11FuzzSample *g_sencSample = nullptr;
void clearIntqueue(std::queue<uint32_t> &q)
{
    std::queue<uint32_t> empty;
    swap(empty, q);
}
} // namespace

VEncAPI11FuzzSample::~VEncAPI11FuzzSample()
{
    Release();
}

static void VencError(OH_AVCodec *codec, int32_t errorCode, void *userData)
{
    cout << "Error errorCode=" << errorCode << endl;
    g_sencSample->isRunning_.store(false);
    g_sencSample->signal_->inCond_.notify_all();
}

static void VencFormatChanged(OH_AVCodec *codec, OH_AVFormat *format, void *userData)
{
    cout << "Format Changed" << endl;
}

static void onEncInputBufferAvailable(OH_AVCodec *codec, uint32_t index, OH_AVBuffer *buffer, void *userData)
{
    VEncSignal *signal = static_cast<VEncSignal *>(userData);
    {
        unique_lock<mutex> lock(signal->inMutex_);
        signal->inIdxQueue_.push(index);
        signal->inBufferQueue_.push(buffer);
    }
    signal->inCond_.notify_all();
}

static void onEncOutputBufferAvailable(OH_AVCodec *codec, uint32_t index, OH_AVBuffer *buffer, void *userData)
{
    VEncSignal *signal = static_cast<VEncSignal *>(userData);
    OH_VideoEncoder_FreeOutputBuffer(codec, index);
    cout << "count = " << signal->count++ << endl;
}

static void onEncInputParam(OH_AVCodec *codec, uint32_t index, OH_AVFormat *parameter, void *userData)
{
    OH_AVFormat_SetIntValue(parameter, OH_MD_KEY_BITRATE, DEFAULT_BITRATE);
    OH_VideoEncoder_PushInputParameter(codec, index);
    return;
}

int64_t VEncAPI11FuzzSample::GetSystemTimeUs()
{
    struct timespec now;
    (void)clock_gettime(CLOCK_BOOTTIME, &now);
    int64_t nanoTime = reinterpret_cast<int64_t>(now.tv_sec) * NANOS_IN_SECOND + now.tv_nsec;

    return nanoTime / NANOS_IN_MICRO;
}

int32_t VEncAPI11FuzzSample::ConfigureVideoEncoder()
{
    OH_AVFormat *format = OH_AVFormat_Create();
    if (format == nullptr) {
        return AV_ERR_UNKNOWN;
    }
    (void)OH_AVFormat_SetIntValue(format, OH_MD_KEY_WIDTH, defaultWidth);
    (void)OH_AVFormat_SetIntValue(format, OH_MD_KEY_HEIGHT, defaultHeight);
    (void)OH_AVFormat_SetIntValue(format, OH_MD_KEY_PIXEL_FORMAT, defaultPixFmt);
    (void)OH_AVFormat_SetDoubleValue(format, OH_MD_KEY_FRAME_RATE, defaultFrameRate);
    (void)OH_AVFormat_SetIntValue(format, OH_MD_KEY_I_FRAME_INTERVAL, defaultKeyFrameInterval);
    if (defaultBitRateMode == CQ) {
        (void)OH_AVFormat_SetIntValue(format, OH_MD_KEY_QUALITY, defaultQuality);
    }
    (void)OH_AVFormat_SetIntValue(format, OH_MD_KEY_VIDEO_ENCODE_BITRATE_MODE, defaultBitRateMode);
    int ret = OH_VideoEncoder_Configure(venc_, format);
    OH_AVFormat_Destroy(format);
    return ret;
}
int32_t VEncAPI11FuzzSample::SetVideoEncoderCallback()
{
    signal_ = new VEncSignal();
    if (signal_ == nullptr) {
        cout << "Failed to new VEncSignal" << endl;
        return AV_ERR_UNKNOWN;
    }
    if (surfInput) {
        int32_t ret = OH_VideoEncoder_RegisterParameterCallback(venc_, onEncInputParam, static_cast<void *>(this));
        if (ret != AV_ERR_OK) {
            return ret;
        }
    }
    cb_.onError = VencError;
    cb_.onStreamChanged = VencFormatChanged;
    cb_.onNeedInputBuffer = onEncInputBufferAvailable;
    cb_.onNewOutputBuffer = onEncOutputBufferAvailable;
    return OH_VideoEncoder_RegisterCallback(venc_, cb_, static_cast<void *>(signal_));
}

void VEncAPI11FuzzSample::StopInloop()
{
    if (inputLoop_ != nullptr && inputLoop_->joinable()) {
        unique_lock<mutex> lock(signal_->inMutex_);
        clearIntqueue(signal_->inIdxQueue_);
        isRunning_.store(false);
        signal_->inCond_.notify_all();
        lock.unlock();

        inputLoop_->join();
        inputLoop_ = nullptr;
    }
}

void VEncAPI11FuzzSample::GetStride()
{
    OH_AVFormat *format = OH_VideoEncoder_GetInputDescription(venc_);
    int32_t inputStride = 0;
    OH_AVFormat_GetIntValue(format, "stride", &inputStride);
    stride_ = inputStride;
    OH_AVFormat_Destroy(format);
}

int32_t VEncAPI11FuzzSample::StartVideoEncoder()
{
    isRunning_.store(true);
    int32_t ret = 0;
    ret = OH_VideoEncoder_Start(venc_);
    GetStride();
    if (ret != AV_ERR_OK) {
        isRunning_.store(false);
        signal_->inCond_.notify_all();
        return ret;
    }
    inputLoop_ = make_unique<thread>(&VEncAPI11FuzzSample::InputFunc, this);
    if (inputLoop_ == nullptr) {
        isRunning_.store(false);
        (void)OH_VideoEncoder_Stop(venc_);
        return AV_ERR_UNKNOWN;
    }
    return AV_ERR_OK;
}

int32_t VEncAPI11FuzzSample::CreateVideoEncoder(const char *codecName)
{
    venc_ = OH_VideoEncoder_CreateByName(codecName);
    g_sencSample = this;
    return venc_ == nullptr ? AV_ERR_UNKNOWN : AV_ERR_OK;
}

void VEncAPI11FuzzSample::WaitForEOS()
{
    if (inputLoop_ && inputLoop_->joinable()) {
        inputLoop_->join();
    }
}

void VEncAPI11FuzzSample::SetEOS(uint32_t index, OH_AVBuffer *buffer)
{
    OH_AVCodecBufferAttr attr;
    attr.pts = 0;
    attr.size = 0;
    attr.offset = 0;
    attr.flags = AVCODEC_BUFFER_FLAGS_EOS;
    OH_AVBuffer_SetBufferAttr(buffer, &attr);
    int32_t res = OH_VideoEncoder_PushInputBuffer(venc_, index);
    cout << "OH_VideoEncoder_PushInputBuffer    EOS   res: " << res << endl;
    unique_lock<mutex> lock(signal_->inMutex_);
    signal_->inIdxQueue_.pop();
    signal_->inBufferQueue_.pop();
}

void VEncAPI11FuzzSample::InputFunc()
{
    while (isRunning_.load()) {
        unique_lock<mutex> lock(signal_->inMutex_);
        signal_->inCond_.wait(lock, [this]() {
            if (!isRunning_.load()) {
                return true;
            }
            return signal_->inIdxQueue_.size() > 0;
        });
        if (!isRunning_.load()) {
            break;
        }
        uint32_t index = signal_->inIdxQueue_.front();
        auto buffer = signal_->inBufferQueue_.front();
        signal_->inIdxQueue_.pop();
        signal_->inBufferQueue_.pop();
        lock.unlock();
        OH_AVCodecBufferAttr attr;
        uint8_t *fileBuffer = OH_AVBuffer_GetAddr(buffer);
        int32_t bufferSize = OH_AVBuffer_GetCapacity(buffer);
        if (fileBuffer == nullptr) {
            break;
        }
        if (memcpy_s(fileBuffer, bufferSize, fuzzData, fuzzSize) != EOK) {
            cout << "Fatal: memcpy fail" << endl;
            break;
        }
        if (frameCount == maxFrameInput) {
            SetEOS(index, buffer);
            break;
        }
        attr.pts = GetSystemTimeUs();
        attr.size = bufferSize;
        attr.offset = 0;
        attr.flags = AVCODEC_BUFFER_FLAGS_NONE;
        OH_AVBuffer_SetBufferAttr(buffer, &attr);
        OH_VideoEncoder_PushInputBuffer(venc_, index);
        frameCount++;
        if (sleepOnFPS) {
            usleep(FRAME_INTERVAL);
        }
    }
}

int32_t VEncAPI11FuzzSample::Flush()
{
    unique_lock<mutex> inLock(signal_->inMutex_);
    clearIntqueue(signal_->inIdxQueue_);
    signal_->inCond_.notify_all();
    inLock.unlock();
    return OH_VideoEncoder_Flush(venc_);
}

int32_t VEncAPI11FuzzSample::Reset()
{
    isRunning_.store(false);
    StopInloop();
    return OH_VideoEncoder_Reset(venc_);
}

int32_t VEncAPI11FuzzSample::Release()
{
    int ret = OH_VideoEncoder_Destroy(venc_);
    venc_ = nullptr;
    if (signal_ != nullptr) {
        delete signal_;
        signal_ = nullptr;
    }
    return ret;
}

int32_t VEncAPI11FuzzSample::Stop()
{
    StopInloop();
    return OH_VideoEncoder_Stop(venc_);
}

int32_t VEncAPI11FuzzSample::Start()
{
    return OH_VideoEncoder_Start(venc_);
}