const fs = require("fs");
const {shell} = require("electron");

module.exports = {
    /**
     * 随机数字
     * @param str
     * @param fixed
     * @returns {number}
     */
    runNum(str, fixed) {
        let _s = Number(str);
        if (_s + "" === "NaN") {
            _s = 0;
        }
        if (/^[0-9]*[1-9][0-9]*$/.test(fixed)) {
            _s = _s.toFixed(fixed);
            let rs = _s.indexOf('.');
            if (rs < 0) {
                _s += ".";
                for (let i = 0; i < fixed; i++) {
                    _s += "0";
                }
            }
        }
        return _s;
    },

    /**
     * 随机字符串
     * @param len
     * @returns {string}
     */
    randomString(len) {
        len = len || 32;
        let $chars = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678oOLl9gqVvUuI1';
        let maxPos = $chars.length;
        let pwd = '';
        for (let i = 0; i < len; i++) {
            pwd += $chars.charAt(Math.floor(Math.random() * maxPos));
        }
        return pwd;
    },

    /**
     * 字符串包含
     * @param string
     * @param find
     * @param lower
     * @returns {boolean}
     */
    strExists(string, find, lower = false) {
        string += "";
        find += "";
        if (lower !== true) {
            string = string.toLowerCase();
            find = find.toLowerCase();
        }
        return (string.indexOf(find) !== -1);
    },

    /**
     * 字符串是否左边包含
     * @param string
     * @param find
     * @param lower
     * @returns {boolean}
     */
    leftExists(string, find, lower = false) {
        string += "";
        find += "";
        if (lower !== true) {
            string = string.toLowerCase();
            find = find.toLowerCase();
        }
        return (string.substring(0, find.length) === find);
    },

    /**
     * 删除左边字符串
     * @param string
     * @param find
     * @param lower
     * @returns {string}
     */
    leftDelete(string, find, lower = false) {
        string += "";
        find += "";
        if (this.leftExists(string, find, lower)) {
            string = string.substring(find.length)
        }
        return string ? string : '';
    },

    /**
     * 打开文件
     * @param path
     */
    openFile(path) {
        if (!fs.existsSync(path)) {
            return
        }
        shell.openPath(path).then(() => {
        })
    },
}