'use strict';

import _ from 'underscore';
import NumberUtil from '../utils/number.js';
import ValidateMixin from '../mixin/validate.js';
import SetOptionsMixin from '../mixin/set-options.js';
import HandleGeneratorMixin from '../mixin/handle-generator.js';
import EMA from './exponential-moving-average.js';

/**
 * @param {object} [options]
 * @param {number} [optons.periods=15]
 * @param {number} [options.startIndex]
 * @param {number} [options.endIndex}] 
 * @param {boolean} [options.sliceOffset=false]
 * @param {boolean} [options.lazyEvaluation=true]
 * @param {number} [option.maxTickDuration=10]
 */
function TRIX(options = {}) {
	if (!new.target) throw new Error('ERROR: TRIX() must be called with new');

	this._options = {
		periods: 15,
		startIndex: null,
		endIndex: null,
		sliceOffset: false,
		lazyEvaluation: true,
		maxTickDuration: 10,
	}

	let m = [SetOptionsMixin, ValidateMixin, HandleGeneratorMixin];
	Object.assign(this, ...m);
	this.setOptions(options);
	this._collection = [];
}

TRIX.prototype = {

	setValues(values) {
		if (!Array.isArray(values)) {
			throw new Error('ERROR: values param is not an array');
		}
		this._collection = values;
	},

	calculate() {
		this._validate(this._collection, this._options);
		return this._handleGenerator(this._compute());
	},

	_compute: function* () {
		let results = [];

		let { periods, startIndex, endIndex, sliceOffset, lazyEvaluation } = this._options;

		let singleEMA = new EMA({ periods, lazyEvaluation: false });
		singleEMA.setValues(this._collection);
		let singleEmaResults = singleEMA.calculate();
		console.log(singleEmaResults);


		return results;
	},


}

export default TRIX;