namespace YLErp.Jobs.Imp
{
    /// <summary>
    /// 任务基类
    /// </summary>
    public abstract class BaseJob : IJob
    {
        private IYcLogger logger = LogFactory.GetLogger("Job日志");
        private object lockObject = new object();

        /// <summary>
        /// 开始运行任务
        /// </summary>
        public void Excute()
        {
            // 开始任务
            bool isStartJob =  StartAsync().Result;
            if (!isStartJob)
                return;

            Task.Run(() => 
            {
                try
                {
                    // 执行任务
                    JobImp();
                }
                catch (Exception ex) 
                {
                    logger.Error(ex);
                }
            }).ContinueWith(t =>
            {
                StopAsync().Wait();
            });
        }

        /// <summary>
        /// 获取任务状态
        /// </summary>
        /// <returns></returns>
        public abstract JobStatus GetJobStatus();
        /// <summary>
        /// 设置任务状态
        /// </summary>
        /// <param name="status"></param>
        public abstract void SetJobStatus(JobStatus status);

        /// <summary>
        /// 开始任务
        /// </summary>
        /// <returns></returns>
        public virtual async Task<bool> StartAsync()
        {
            return await Task.Run(() => 
            {
                lock (lockObject)
                {
                    var Status= GetJobStatus();
                    if (Status == JobStatus.Init || Status == JobStatus.Stop)
                    {
                        SetJobStatus(JobStatus.Start);
                        return true;
                    }
                    else if (Status == JobStatus.Start)
                    {
                        return false;
                    }
                    return true;
                }
            });
        }

        /// <summary>
        /// 停止任务
        /// </summary>
        /// <returns></returns>
        public virtual async Task<bool> StopAsync()
        {
            return await Task.Run(() => 
            {
                SetJobStatus(JobStatus.Stop);
                return true;
            });
        }

        /// <summary>
        /// 任务的具体业务实现
        /// </summary>
        /// <returns></returns>
        public abstract Task JobImp();
    }

    /// <summary>
    /// 任务状态枚举
    /// </summary>
    public enum JobStatus
    {
        /// <summary>
        /// 初始状态
        /// </summary>
        Init,
        /// <summary>
        /// 开始状态
        /// </summary>
        Start,
        /// <summary>
        /// 停止状态
        /// </summary>
        Stop
    }
}