package com.silence.quartz.util;

import org.quartz.CronScheduleBuilder;
import org.quartz.CronTrigger;
import org.quartz.Job;
import org.quartz.JobBuilder;
import org.quartz.JobDataMap;
import org.quartz.JobDetail;
import org.quartz.JobKey;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.TriggerBuilder;
import org.quartz.TriggerKey;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.silence.common.constant.ScheduleConstants;
import com.silence.common.exception.job.TaskException;
import com.silence.common.exception.job.TaskException.Code;
import com.silence.quartz.domain.SysJob;

/**
 * 定时任务工具类
 * 
 * @author silence
 *
 */
public class ScheduleUtils
{
    private static final Logger log = LoggerFactory.getLogger(ScheduleUtils.class);

    /**
     * 得到quartz任务类
     *
     * @param sysJob 执行计划
     * @return 具体执行任务类
     */
    private static Class<? extends Job> getQuartzJobClass(SysJob sysJob)
    {
        boolean isConcurrent = "0".equals(sysJob.getConcurrent());
        return isConcurrent ? QuartzJobExecution.class : QuartzDisallowConcurrentExecution.class;
    }

    /**
     * 获取触发器key
     */
    public static TriggerKey getTriggerKey(Long jobId)
    {
        return TriggerKey.triggerKey(ScheduleConstants.TASK_CLASS_NAME + jobId);
    }

    /**
     * 获取jobKey
     */
    public static JobKey getJobKey(Long jobId)
    {
        return JobKey.jobKey(ScheduleConstants.TASK_CLASS_NAME + jobId);
    }

    /**
     * 获取表达式触发器
     */
    public static CronTrigger getCronTrigger(Scheduler scheduler, Long jobId)
    {
        try
        {
            return (CronTrigger) scheduler.getTrigger(getTriggerKey(jobId));
        }
        catch (SchedulerException e)
        {
            log.error("getCronTrigger 异常：", e);
        }
        return null;
    }

    /**
     * 创建定时任务
     */
    public static void createScheduleJob(Scheduler scheduler, SysJob job) throws SchedulerException, TaskException
    {
        Class<? extends Job> jobClass = getQuartzJobClass(job);
        // 构建job信息
        JobDetail jobDetail = JobBuilder.newJob(jobClass).withIdentity(getJobKey(job.getJobId())).build();

        // 表达式调度构建器
        CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule(job.getCronExpression());
        cronScheduleBuilder = handleCronScheduleMisfirePolicy(job, cronScheduleBuilder);

        // 按新的cronExpression表达式构建一个新的trigger
        CronTrigger trigger = TriggerBuilder.newTrigger().withIdentity(getTriggerKey(job.getJobId()))
                .withSchedule(cronScheduleBuilder).build();

        // 放入参数，运行时的方法可以获取
        jobDetail.getJobDataMap().put(ScheduleConstants.TASK_PROPERTIES, job);

        scheduler.scheduleJob(jobDetail, trigger);

        // 暂停任务
        if (job.getStatus().equals(ScheduleConstants.Status.PAUSE.getValue()))
        {
            pauseJob(scheduler, job.getJobId());
        }
    }

    /**
     * 更新定时任务
     */
    public static void updateScheduleJob(Scheduler scheduler, SysJob job) throws SchedulerException, TaskException
    {
        JobKey jobKey = getJobKey(job.getJobId());

        // 判断是否存在
        if (scheduler.checkExists(jobKey))
        {
            // 先移除，然后做更新操作
            scheduler.deleteJob(jobKey);
        }

        createScheduleJob(scheduler, job);

        // 暂停任务
        if (job.getStatus().equals(ScheduleConstants.Status.PAUSE.getValue()))
        {
            pauseJob(scheduler, job.getJobId());
        }
    }

    /**
     * 立即执行任务
     */
    public static void run(Scheduler scheduler, SysJob job) throws SchedulerException
    {
        // 参数
        JobDataMap dataMap = new JobDataMap();
        dataMap.put(ScheduleConstants.TASK_PROPERTIES, job);

        scheduler.triggerJob(getJobKey(job.getJobId()), dataMap);
    }

    /**
     * 暂停任务
     */
    public static void pauseJob(Scheduler scheduler, Long jobId) throws SchedulerException
    {
        scheduler.pauseJob(getJobKey(jobId));
    }

    /**
     * 恢复任务
     */
    public static void resumeJob(Scheduler scheduler, Long jobId) throws SchedulerException
    {
        scheduler.resumeJob(getJobKey(jobId));
    }

    /**
     * 删除定时任务
     */
    public static void deleteScheduleJob(Scheduler scheduler, Long jobId) throws SchedulerException
    {
        scheduler.deleteJob(getJobKey(jobId));
    }

    public static CronScheduleBuilder handleCronScheduleMisfirePolicy(SysJob job, CronScheduleBuilder cb)
            throws TaskException
    {
        switch (job.getMisfirePolicy())
        {
            case ScheduleConstants.MISFIRE_DEFAULT:
                return cb;
            case ScheduleConstants.MISFIRE_IGNORE_MISFIRES:
                return cb.withMisfireHandlingInstructionIgnoreMisfires();
            case ScheduleConstants.MISFIRE_FIRE_AND_PROCEED:
                return cb.withMisfireHandlingInstructionFireAndProceed();
            case ScheduleConstants.MISFIRE_DO_NOTHING:
                return cb.withMisfireHandlingInstructionDoNothing();
            default:
                throw new TaskException("The task misfire policy '" + job.getMisfirePolicy()
                        + "' cannot be used in cron schedule tasks", Code.CONFIG_ERROR);
        }
    }
}
