import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.TaskScheduler;
import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;

// 配置定時任務(wù)線程池
@Configuration
public class SchedulingConfig {
    @Bean
    public TaskScheduler taskScheduler() {
        ThreadPoolTaskScheduler taskScheduler = new ThreadPoolTaskScheduler();
        // 定時任務(wù)執(zhí)行線程池核心線程數(shù)
        taskScheduler.setPoolSize(4);
        taskScheduler.setRemoveOnCancelPolicy(true);
        taskScheduler.setThreadNamePrefix("TaskSchedulerThreadPool-test-");
        return taskScheduler;
    }
}

// ScheduledFuture的包裝類
public final class ScheduledTask {

    volatile ScheduledFuture<?> future;

    /**
     * 取消定時任務(wù)
     */
    public void cancel() {
        ScheduledFuture<?> future = this.future;
        if (future != null) {
            future.cancel(true);
        }
    }
}

/**
 * 添加定時任務(wù)注冊，用來增加、刪除定時任務(wù)。
 */
@Component
public class CronTaskRegistrar implements DisposableBean {

    private final Map<Runnable, ScheduledTask> scheduledTasks = new ConcurrentHashMap<>(16);

    @Autowired
    private TaskScheduler taskScheduler;

    public TaskScheduler getScheduler() {
        return this.taskScheduler;
    }

    // 添加定時任務(wù)
    public void addCronTask(Runnable task, String cronExpression) {
        addCronTask(new CronTask(task, cronExpression));
    }

    // 添加定時任務(wù)
    public void addCronTask(CronTask cronTask) {
        if (cronTask != null) {
            Runnable task = cronTask.getRunnable();
            if (this.scheduledTasks.containsKey(task)) {
                removeCronTask(task);
            }

            this.scheduledTasks.put(task, scheduleCronTask(cronTask));
        }
    }
    // 移除定時任務(wù)
    public void removeCronTask(Runnable task) {
        ScheduledTask scheduledTask = this.scheduledTasks.remove(task);
        if (scheduledTask != null)
            scheduledTask.cancel();
    }

    public ScheduledTask scheduleCronTask(CronTask cronTask) {
        ScheduledTask scheduledTask = new ScheduledTask();
        scheduledTask.future = this.taskScheduler.schedule(cronTask.getRunnable(), cronTask.getTrigger());

        return scheduledTask;
    }


    @Override
    public void destroy() {
        for (ScheduledTask task : this.scheduledTasks.values()) {
            task.cancel();
        }
        this.scheduledTasks.clear();
    }
}

// 添加Runnable接口實現(xiàn)類，被定時任務(wù)線程池調(diào)用，用來執(zhí)行指定bean里面的方法。
@Slf4j
public class SchedulingRunnable implements Runnable {

    // bean名稱
    private String beanName;

    // 方法名稱
    private String methodName;

    // 方法參數(shù)
    private String params;

    public SchedulingRunnable(String beanName, String methodName) {
        this(beanName, methodName, null);
    }

    public SchedulingRunnable(String beanName, String methodName, String params) {
        this.beanName = beanName;
        this.methodName = methodName;
        this.params = params;
    }

    @Override
    public void run() {
        log.info("定時任務(wù)開始執(zhí)行 - bean：{}，方法：{}，參數(shù)：{}", beanName, methodName, params);
        long startTime = System.currentTimeMillis();

        try {
            Object target = SpringContextUtils.getBean(beanName);

            Method method = null;
            if (StringUtils.isNotEmpty(params)) {
                method = target.getClass().getDeclaredMethod(methodName, String.class);
            } else {
                method = target.getClass().getDeclaredMethod(methodName);
            }

            ReflectionUtils.makeAccessible(method);
            if (StringUtils.isNotEmpty(params)) {
                method.invoke(target, params);
            } else {
                method.invoke(target);
            }
        } catch (Exception ex) {
            log.error(String.format("定時任務(wù)執(zhí)行異常 - bean：%s，方法：%s，參數(shù)：%s ", beanName, methodName, params), ex);
        }

        long times = System.currentTimeMillis() - startTime;
        log.info("定時任務(wù)執(zhí)行結(jié)束 - bean：{}，方法：{}，參數(shù)：{}，耗時：{} 毫秒", beanName, methodName, params, times);
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        SchedulingRunnable that = (SchedulingRunnable) o;
        if (params == null) {
            return beanName.equals(that.beanName) &&
                    methodName.equals(that.methodName) &&
                    that.params == null;
        }

        return beanName.equals(that.beanName) &&
                methodName.equals(that.methodName) &&
                params.equals(that.params);
    }

    @Override
    public int hashCode() {
        if (params == null) {
            return Objects.hash(beanName, methodName);
        }

        return Objects.hash(beanName, methodName, params);
    }
}

// 從spring容器里獲取bean
@Component
public class SpringContextUtils implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext)
            throws BeansException {
        SpringContextUtils.applicationContext = applicationContext;
    }

    public static Object getBean(String name) {
        return applicationContext.getBean(name);
    }

    public static <T> T getBean(Class<T> requiredType) {
        return applicationContext.getBean(requiredType);
    }

    public static <T> T getBean(String name, Class<T> requiredType) {
        return applicationContext.getBean(name, requiredType);
    }

    public static boolean containsBean(String name) {
        return applicationContext.containsBean(name);
    }

    public static boolean isSingleton(String name) {
        return applicationContext.isSingleton(name);
    }

    public static Class<? extends Object> getType(String name) {
        return applicationContext.getType(name);
    }
}

// 測試類
@Component("testTask")
public class TestTask {

    /**
     * 有參方法
     * @param params
     */
    public void taskWithParams(String params) {
        System.out.println("執(zhí)行有參示例任務(wù)：" + params);
    }

    /**
     * 無慘方法
     */
    public void taskNoParams() {
        System.out.println("執(zhí)行無參示例任務(wù)");
    }
}

@RestController
@RequestMapping("/test")
public class TestController {

    @Autowired
    private CronTaskRegistrar cronTaskRegistrar;

    @RequestMapping("/addTest")
    public String addTest(boolean flg){
        SchedulingRunnable task;
        if (flg) {
            // 創(chuàng)建無慘任務(wù)
            task = new SchedulingRunnable("testTask", "taskNoParams");
        }
        else {
            task = new SchedulingRunnable("testTask", "taskWithParams", "hello word");
        }
        cronTaskRegistrar.addCronTask(task, "0/1 * * * * *");
        return "ok";
    }

    @RequestMapping("/updateTest")
    public String updateTest(boolean flg){
        //先移除再添加
        if(flg) {
            // 創(chuàng)建無慘任務(wù)
            SchedulingRunnable task = new SchedulingRunnable("testTask", "taskNoParams");
            cronTaskRegistrar.removeCronTask(task);
        }
        else {
            SchedulingRunnable task = new SchedulingRunnable("testTask", "taskWithParams", "hello word");
            cronTaskRegistrar.removeCronTask(task);
        }

        SchedulingRunnable task = new SchedulingRunnable("testTask", "taskWithParams", "hello word");
        cronTaskRegistrar.addCronTask(task, "0/5 * * * * *");
        return "ok";
    }

    @RequestMapping("/delTest")
    public String delTest(){
        SchedulingRunnable task = new SchedulingRunnable("testTask", "taskNoParams");
        cronTaskRegistrar.removeCronTask(task);
        return "ok";
    }

    @RequestMapping("/startTest")
    public String startTest(boolean flg){
        /**
         * 啟停定時任務(wù)的邏輯就是創(chuàng)建新的任務(wù)或者刪除任務(wù)，參數(shù)一致即可
         * 可以結(jié)合數(shù)據(jù)庫，將配置信息存入數(shù)據(jù)庫
         */
        if(flg) {
            SchedulingRunnable task = new SchedulingRunnable("testTask", "taskNoParams");
            cronTaskRegistrar.addCronTask(task, "0/5 * * * * *");
        }
        else {
            SchedulingRunnable task = new SchedulingRunnable("testTask", "taskNoParams");
            cronTaskRegistrar.removeCronTask(task);
        }
        return "ok";
    }
}

// 定時任務(wù)實體
@Data
public class JobEntity {
    /**
     * 任務(wù)ID
     */
    private Integer jobId;
    /**
     * bean名稱
     */
    private String beanName;
    /**
     * 方法名稱
     */
    private String methodName;
    /**
     * 方法參數(shù)
     */
    private String methodParams;
    /**
     * cron表達式
     */
    private String cronExpression;
    /**
     * 狀態(tài)（1正常 0暫停）
     */
    private Integer jobStatus;
    /**
     * 備注
     */
    private String remark;
    /**
     * 創(chuàng)建時間
     */
    private Date createTime;
    /**
     * 更新時間
     */
    private Date updateTime;

}

/**
 * @description:    初始化數(shù)據(jù)庫任務(wù)，可以再程啟動的時候加載數(shù)據(jù)庫里的任務(wù)
 * @author: HK
 * @since: 2025/4/21 18:21
 */
@Component
@Slf4j
public class InitTask implements CommandLineRunner {

    @Autowired
    private CronTaskRegistrar cronTaskRegistrar;

    @Override
    public void run(String... args) {
        // 初始加載數(shù)據(jù)庫里狀態(tài)為正常的定時任務(wù)
/*        List<SysJobPO> jobList = service.getJobList("1");
        if (CollectionUtils.isNotEmpty(jobList)) {
            for (SysJobPO job : jobList) {
                SchedulingRunnable task = new SchedulingRunnable(job.getBeanName(), job.getMethodName(), job.getMethodParams());
                cronTaskRegistrar.addCronTask(task, job.getCronExpression());
            }

            log.info("定時任務(wù)已加載完畢...");
        }*/
    }
}