/**
 *****************************************
 * Created by edonet@163.com
 * Created on 2021-03-21 18:01:35
 *****************************************
 */
'use strict';


/**
 *****************************************
 * 加载依赖
 *****************************************
 */
import { setTimer } from './delay';


/**
 *****************************************
 * 设置延时
 *****************************************
 */
function delay(time: number, callback: () => void | boolean): () => void {
    let cb: (() => void) | void;

    // 设置延时
    cb = setTimer(time, function invoke() {

        // 执行回调
        if (callback() !== false && cb) {
            return cb = setTimer(time, invoke);
        }

        // 清空取消函数
        cb = undefined;
    });

    // 返回取消函数
    return () => {
        if (cb) {
            cb = cb();
        }
    };
}


/**
 *****************************************
 * 定时器
 *****************************************
 */
function interval(time: number, callback: () => void | boolean): () => void;
function interval(callback: () => void | boolean): () => void;
function interval(callback: () => void | boolean, time: number): () => void;
function interval(time: unknown, callback?: unknown): () => void {

    // 重载参数
    if (typeof time === 'function') {
        return delay(callback as number, time as () => void);
    }

    // 校验参数
    if (typeof callback !== 'function') {
        throw new Error('`callback` expected a Function');
    }

    // 设置计时器
    return delay(time as number, callback as () => void);
}


/**
 *****************************************
 * 抛出接口
 *****************************************
 */
export { interval };