using Quartz;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace IStation.Server
{
    /// <summary>
    /// MiddleLib数据对接服务任务辅助类 只能有一个实例
    /// </summary>
    internal class ServiceJobHelper
    {
        private const string _jobName = "MiddleLibServiceJob";
        private const string _jobGroup = "MiddleLibServiceJobGroup";
        private const string _triggerName = "MiddleLibServiceJobTrigger";
        private static IScheduler _sched;//调度器


        /// <summary>
        /// 开始任务
        /// </summary>
        public async Task StartJob()
        {
            if (_sched != null)
                return;

            // 1.创建scheduler的引用
            var fac = new Quartz.Impl.StdSchedulerFactory();
            _sched = await fac.GetScheduler();

            //2.启动 scheduler
            await _sched.Start();

            //3.创建任务
            var job = JobBuilder.Create<ServiceJob>()
             .WithIdentity(_jobName, _jobGroup)
             .Build();

            //4.创建Trigger
            var trigger = TriggerBuilder.Create()
            .WithIdentity(_triggerName, _jobGroup)
            .WithSimpleSchedule(x => x.WithIntervalInMinutes(ConfigHelper.ResetFrequency)
            .RepeatForever()
            .WithMisfireHandlingInstructionNextWithRemainingCount())
            .Build();

            //5.加入调度管理器
            await _sched.ScheduleJob(job, trigger);
        }

        /// <summary>
        /// 取消任务
        /// </summary>
        public async Task CancelJob()
        {
            if (_sched == null)
                return;
            var triggerKey = new TriggerKey(_triggerName, _jobGroup);
            if (await _sched.CheckExists(triggerKey))
            {
                await _sched.UnscheduleJob(triggerKey);
            }
            ServiceJob.CancelJobs();
        }
    }
}