import { flowConfig } from '../config/flow-config.ts'

export let utils = {
	seqNo: 1,
	getId: function() {
		let idType = flowConfig.idType;
		if (typeof idType == 'string') {
			if (idType === 'uuid') {
				return this.getUUID();
			} else if (idType === 'time_stamp') {
				return this.getTimeStamp();
			}
		} else if (idType instanceof Array) {
			if (idType[0] === 'sequence') {
				return this.getSequence(idType[1]);
			} else if (idType[0] === 'time_stamp_and_sequence') {
				return this.getTimeStampAndSequence(idType[1]);
			} else if (idType[0] === 'custom') {
				return idType[1]();
			}
		}
	},
	getUUID: function() {
		let s = [];
		let hexDigits = "0123456789abcdef";
		for(let i = 0; i < 36; i++) {
			s[i] = hexDigits.substr(Math.floor(Math.random() * 0x10), 1);
		}
		s[14] = "4";
		s[19] = hexDigits.substr((s[19] & 0x3) | 0x8, 1);
		s[8] = s[13] = s[18] = s[23] = "-";

		let uuid = s.join("");
		return uuid.replace(/-/g, '');
	},
	getTimeStamp: function() {
		return new Date().getTime();
	},
	getSequence: function(seqNoLength) {
		let zeroStr = new Array(seqNoLength).fill('0').join('');
		return (zeroStr + (this.seqNo++)).slice(-seqNoLength);
	},
	getTimeStampAndSequence: function(seqNoLength) {
		return this.getTimeStamp() + this.getSequence(seqNoLength);
	},
	add: function(a, b) {
		let c, d, e;
		try {
			c = a.toString().split(".")[1].length;
		} catch (f) {
			c = 0;
		}
		try {
			d = b.toString().split(".")[1].length;
		} catch (f) {
			d = 0;
		}
		return e = Math.pow(10, Math.max(c, d)), (this.mul(a, e) + this.mul(b, e)) / e;
	},
	sub: function(a, b) {
		let c, d, e;
		try {
			c = a.toString().split(".")[1].length;
		} catch (f) {
			c = 0;
		}
		try {
			d = b.toString().split(".")[1].length;
		} catch (f) {
			d = 0;
		}
		return e = Math.pow(10, Math.max(c, d)), (this.mul(a, e) - this.mul(b, e)) / e;
	},
	mul: function(a, b) {
		let c = 0, d = a.toString(), e = b.toString();
		try {
			c += d.split(".")[1].length;
		} catch (f) {}
		try {
			c += e.split(".")[1].length;
		} catch (f) {}
		return Number(d.replace(".", "")) * Number(e.replace(".", "")) / Math.pow(10, c);
	},
	div: function(a, b) {
		let c, d, e = 0, f = 0;
		try {
			e = a.toString().split(".")[1].length;
		} catch (g) {}
		try {
			f = b.toString().split(".")[1].length;
		} catch (g) {}
		return c = Number(a.toString().replace(".", "")), d = Number(b.toString().replace(".", "")), this.mul(c / d, Math.pow(10, f - e));
	},
	deepClone(obj) {
		let newObj;
		try {
			newObj = obj.push ? [] : {};
		} catch (error) {
			newObj = {};
		}
		for (let attr in obj) {
			if (obj[attr] && typeof obj[attr] === 'object') {
				newObj[attr] = this.deepClone(obj[attr]);
			} else {
				newObj[attr] = obj[attr];
			}
		}
		return newObj;
	}
};