import { CommonUtils } from "./common"

export default class elemIterator{
	current = 0
	elemArray = []
	constructor(current, elemArray){
		if(CommonUtils.isAllDigits(current) == false) {
			current = 0
		}
		
		if(Array.isArray(elemArray) == false){
			elemArray = []
		}
		
		this.current =  Number(current)
		this.elemArray = elemArray
	}
	
	setElemArray(elemArray) {
		if(Array.isArray(elemArray) == false){
			throw new TypeError()
		}
		this.elemArray = elemArray
	}
	
	setElemArrayArgs(...args) {
		this.elemArray = args
	}
	
	moveNext(){
		this.current++
		if(this.current == this.elemArray.length){
			this.current = 0
		}
	}
	
	getCurrentElem(){
		return this.elemArray[this.current]
	}
	
	exec(callback){
		if(Object.prototype.toString.call(callback) !== '[object Function]'){
			throw new TypeError()
		}
		
		callback.call(null, this.elemArray[this.current])
	}
}