package com.vci.frameworkcore.ajaxTask;

import com.vci.frameworkcore.compatibility.SmUserQueryServiceI;

import java.util.concurrent.Delayed;
import java.util.concurrent.TimeUnit;

/**
 * 解锁用户的延时任务
 * 每个任务的执行时间可能会不一样
 * @author weidy
 * @date 2020/2/5
 */
public class SmUserUnLockTask implements Delayed {

    /**
     * 用户服务
    **/
    final private SmUserQueryServiceI userService;

    /**
     * 用户的主键
     */
    final private String userId ;

    /**
     * 延时时间
     */
    final private Long delayTime;

    public SmUserUnLockTask(SmUserQueryServiceI userService, String userId, Long delayTime) {
        super();
        this.userService = userService;
        this.userId = userId;
        this.delayTime = delayTime + System.currentTimeMillis();
    }

    public SmUserQueryServiceI getUserService() {
        return userService;
    }

    public String getUserId() {
        return userId;
    }

    public Long getDelayTime() {
        return delayTime;
    }

    /**
     * Returns the remaining delay associated with this object, in the
     * given time unit.
     *
     * @param unit the time unit
     * @return the remaining delay; zero or negative values indicate
     * that the delay has already elapsed
     */
    @Override
    public long getDelay(TimeUnit unit) {
        return unit.convert(this.delayTime - System.currentTimeMillis(), unit);
    }

    /**
     * Compares this object with the specified object for order.  Returns a
     * negative integer, zero, or a positive integer as this object is less
     * than, equal to, or greater than the specified object.
     *
     * <p>The implementor must ensure <tt>sgn(x.compareTo(y)) ==
     * -sgn(y.compareTo(x))</tt> for all <tt>x</tt> and <tt>y</tt>.  (This
     * implies that <tt>x.compareTo(y)</tt> must throw an exception iff
     * <tt>y.compareTo(x)</tt> throws an exception.)
     *
     * <p>The implementor must also ensure that the relation is transitive:
     * <tt>(x.compareTo(y)&gt;0 &amp;&amp; y.compareTo(z)&gt;0)</tt> implies
     * <tt>x.compareTo(z)&gt;0</tt>.
     *
     * <p>Finally, the implementor must ensure that <tt>x.compareTo(y)==0</tt>
     * implies that <tt>sgn(x.compareTo(z)) == sgn(y.compareTo(z))</tt>, for
     * all <tt>z</tt>.
     *
     * <p>It is strongly recommended, but <i>not</i> strictly required that
     * <tt>(x.compareTo(y)==0) == (x.equals(y))</tt>.  Generally speaking, any
     * class that implements the <tt>Comparable</tt> interface and violates
     * this condition should clearly indicate this fact.  The recommended
     * language is "Note: this class has a natural ordering that is
     * inconsistent with equals."
     *
     * <p>In the foregoing description, the notation
     * <tt>sgn(</tt><i>expression</i><tt>)</tt> designates the mathematical
     * <i>signum</i> function, which is defined to return one of <tt>-1</tt>,
     * <tt>0</tt>, or <tt>1</tt> according to whether the value of
     * <i>expression</i> is negative, zero or positive.
     *
     * @param o the object to be compared.
     * @return a negative integer, zero, or a positive integer as this object
     * is less than, equal to, or greater than the specified object.
     * @throws NullPointerException if the specified object is null
     * @throws ClassCastException   if the specified object's type prevents it
     *                              from being compared to this object.
     */
    @Override
    public int compareTo(Delayed o) {
        long delta = getDelay(TimeUnit.NANOSECONDS) - o.getDelay(TimeUnit.NANOSECONDS);
        return (int) delta;
    }

    /**
     * 对比
     * @param obj
     * @return
     */
    @Override
    public boolean equals(Object obj) {
        if (obj instanceof String) {
            return this.userId.equals(((String) obj));
        }
        return false;
    }

    @Override
    public String toString() {
        return "SmUserUnLockTask{" +
                "userService=" + userService +
                ", userId='" + userId + '\'' +
                ", delayTime=" + delayTime +
                '}';
    }
}