/**
 *****************************************
 * Created by edonet@163.com
 * Created on 2019-11-30 20:31:00
 *****************************************
 */
'use strict';


/**
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 * 加载依赖
 *****************************************
 */
import { Extend, O } from './d';


/**
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 * 剔除属性
 *****************************************
 */
function omit<T>(origin: T): T;
function omit<T, P extends keyof T>(origin: T, keys: P[]): Omit<T, P>;
function omit<T, P, Q extends keyof P>(target: T, origin: P, keys: Q[]): Extend<T, Omit<P, Q>>;
function omit(target: O, origin?: unknown, keys?: unknown): unknown {

    // 重载函数
    if (typeof keys === 'undefined') {
        return omit({}, target, (origin || null) as []);
    }

    // 校验参数
    const props = Array.isArray(keys) ? keys : null;

    // 拷贝属性
    Object.keys(origin as O).forEach((key: string) => {
        if (!props || props.indexOf(key) === -1) {
            target[key as keyof O] = (origin as O)[key as keyof O];
        }
    });

    // 返回结果
    return target;
}


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