/*
 * 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);
    pid_t tid = 0;
    auto task = [&tid]() mutable {
        tid = gettid();
        TLOGI(WmsLogTag::WMS_MAIN, "get WMSTid %{public}d", static_cast<int>(tid));
    };
    handler_->PostSyncTask(std::move(task), "wms:setTid", AppExecFwk::EventQueue::Priority::IMMEDIATE);
    ssmTid_ = tid;
}

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 = [weak = weak_from_this(), task, name]() {
        HITRACE_METER_FMT(HITRACE_TAG_WINDOW_MANAGER, "ssm:%s", name.c_str());
        task();
        if (auto self = weak.lock()) {
            self->ExecuteExportTask();
        }
    };
    handler_->PostTask(std::move(localTask), "wms:" + name, delayTime, AppExecFwk::EventQueue::Priority::IMMEDIATE);
}

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 = [weak = weak_from_this(), task, name]() {
        HITRACE_METER_FMT(HITRACE_TAG_WINDOW_MANAGER, "ssm:%s", name.c_str());
        task();
        if (auto self = weak.lock()) {
            self->ExecuteExportTask();
        }
    };
    handler_->PostSyncTask(std::move(localTask), "wms:" + name, AppExecFwk::EventQueue::Priority::IMMEDIATE);
}

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

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

void TaskScheduler::AddExportTask(std::string taskName, Task task)
{
    if (ssmTid_ == 0 || gettid() != ssmTid_) {
        return task();
    }
    exportFuncMap_[taskName] = task;
}

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

void TaskScheduler::ExecuteExportTask()
{
    if (exportFuncMap_.empty()) {
        return;
    }
    std::shared_ptr<AppExecFwk::EventHandler> exportHandler = exportHandler_.lock();
    if (!exportHandler) {
        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(task, "wms:exportTask");
}

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