/*
 * Copyright (c) 2023 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 "common/include/task_scheduler.h"
#include "hitrace_meter.h"
#include "window_manager_hilog.h"

namespace OHOS::Rosen {
TaskScheduler::TaskScheduler(const std::string& threadName)
{
    auto runner = AppExecFwk::EventRunner::Create(threadName);
    handler_ = std::make_shared<AppExecFwk::EventHandler>(runner);
}

std::shared_ptr<AppExecFwk::EventHandler> TaskScheduler::GetEventHandler()
{
    return handler_;
}

void TaskScheduler::PostAsyncTask(Task&& task, const std::string& name, int64_t delayTime)
{
    if (delayTime == 0 && handler_->GetEventRunner()->IsCurrentRunnerThread()) {
        HITRACE_METER_FMT(HITRACE_TAG_WINDOW_MANAGER, "ssm:%s", name.c_str());
        task();
        return;
    }
    auto localTask = [this, task = std::move(task), name] {
        HITRACE_METER_FMT(HITRACE_TAG_WINDOW_MANAGER, "ssm:%s", name.c_str());
        task();
        ExecuteExportTask();
    };
    handler_->PostTask(std::move(localTask), "wms:" + name, delayTime, AppExecFwk::EventQueue::Priority::IMMEDIATE);
}

void TaskScheduler::PostTask(Task&& task, const std::string& name, int64_t delayTime)
{
    PostAsyncTask(std::move(task), name, delayTime);
}

void TaskScheduler::RemoveTask(const std::string& name)
{
    handler_->RemoveTask("wms:" + name);
}

void TaskScheduler::PostVoidSyncTask(Task&& task, const std::string& name)
{
    if (handler_->GetEventRunner()->IsCurrentRunnerThread()) {
        HITRACE_METER_FMT(HITRACE_TAG_WINDOW_MANAGER, "ssm:%s", name.c_str());
        task();
        return;
    }
    auto localTask = [this, &task, &name] {
        HITRACE_METER_FMT(HITRACE_TAG_WINDOW_MANAGER, "ssm:%s", name.c_str());
        task();
        ExecuteExportTask();
    };
    handler_->PostSyncTask(std::move(localTask), "wms:" + name, AppExecFwk::EventQueue::Priority::IMMEDIATE);
}

void TaskScheduler::SetExportHandler(const std::shared_ptr<AppExecFwk::EventHandler>& handler)
{
    exportHandler_ = handler;
}

void TaskScheduler::AddExportTask(std::string taskName, Task&& task)
{
    if (handler_->GetEventRunner()->IsCurrentRunnerThread()) {
        exportFuncMap_[std::move(taskName)] = std::move(task);
    } else {
        task();
    }
}

void TaskScheduler::ExecuteExportTask()
{
    if (!exportHandler_ || exportFuncMap_.empty()) {
        return;
    }
    auto task = [funcMap = std::move(exportFuncMap_)] {
        for (auto iter = funcMap.begin(); iter != funcMap.end(); iter++) {
            HITRACE_METER_FMT(HITRACE_TAG_WINDOW_MANAGER, "ssm:%s", iter->first.c_str());
            iter->second();
        }
    };
    exportFuncMap_.clear();
    exportHandler_->PostTask(std::move(task), "wms:exportTask");
}

void StartTraceForSyncTask(const std::string& name)
{
    StartTraceArgs(HITRACE_TAG_WINDOW_MANAGER, "ssm:%s", name.c_str());
}
void FinishTraceForSyncTask()
{
    FinishTrace(HITRACE_TAG_WINDOW_MANAGER);
}
} // namespace OHOS::Rosen