/*
 * Copyright (c) Huawei Technologies Co., Ltd. 2021. All rights reserved.
 * 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 <cinttypes>
#include <unistd.h>
#include "logging.h"
#include "share_memory_allocator.h"
#include "stack_writer.h"
namespace {
    const int WAIT_TIMEOUT_SA = 3000000;
}
StackWriter::StackWriter(std::string name,
                         uint32_t size,
                         int smbFd,
                         int eventFd,
                         bool blocked,
                         bool isSaMode)
    : pluginName_(name), blocked_(blocked)
{
    shareMemoryBlock_ = ShareMemoryAllocator::GetInstance().CreateMemoryBlockRemote(name, size, smbFd);
    if (isSaMode && shareMemoryBlock_ != nullptr) {
        shareMemoryBlock_->SetWaitTime(WAIT_TIMEOUT_SA);
    }
    eventNotifier_ = EventNotifier::CreateWithFd(eventFd);
    lastFlushTime_ = std::chrono::steady_clock::now();
}

StackWriter::~StackWriter()
{
    eventNotifier_ = nullptr;
    ShareMemoryAllocator::GetInstance().ReleaseMemoryBlockRemote(pluginName_);
    shareMemoryBlock_ = nullptr;
}

void StackWriter::Report() const
{
}

void StackWriter::DoStats(long bytes)
{
    ++writeCount_;
    bytesCount_ += bytes;
    bytesPending_ += bytes;
}

long StackWriter::Write(const void* data, size_t size)
{
    if (shareMemoryBlock_ == nullptr || data == nullptr || size == 0) {
        return false;
    }
    return shareMemoryBlock_->PutRaw(reinterpret_cast<const int8_t*>(data), size);
}

long StackWriter::WriteTimeout(const void* data, size_t size)
{
    if (shareMemoryBlock_ == nullptr || data == nullptr || size == 0) {
        return false;
    }
    return shareMemoryBlock_->PutRawTimeout(reinterpret_cast<const int8_t*>(data), size);
}

long StackWriter::WriteWithPayloadTimeout(const void* data, size_t size, const void* payload, size_t payloadSize,
                                          const std::function<bool()>& callback)
{
    if (shareMemoryBlock_ == nullptr || data == nullptr || size == 0) {
        return false;
    }
    if (blocked_) {
        return shareMemoryBlock_->PutWithPayloadSync(
            reinterpret_cast<const int8_t*>(data),
            size,
            reinterpret_cast<const int8_t*>(payload),
            payloadSize,
            callback);
    } else {
        return shareMemoryBlock_->PutWithPayloadTimeout(
            reinterpret_cast<const int8_t*>(data), size, reinterpret_cast<const int8_t*>(payload), payloadSize);
    }
}

bool StackWriter::Flush()
{
    ++flushCount_;
    eventNotifier_->Post(flushCount_.load());
    lastFlushTime_ = std::chrono::steady_clock::now();
    bytesPending_ = 0;
    return true;
}