'use strict';

import NumberUtil from '../utils/number.js';
import _ from 'underscore';

export default {

	_validate(collection = null, options = null) {

		let hasCollection = false;
		let hasOptions = false;

		if (Array.isArray(collection)) {
			hasCollection = true;
		}

		if (_.isObject(options)) {
			hasOptions = true;
		}

		if (hasCollection && _.isEmpty(collection)) {
			throw new Error('ERROR: No data');
		}

		if (hasOptions && hasCollection && _.has(options, 'periods')) {
			if (options.periods > collection.length) {
				throw new Error('ERROR: periods option must be lower than values list length');
			}
			if (!NumberUtil.isNumeric(options.periods) || options.periods <= 1) {
				throw new Error('ERROR: Invalid periods options');
			}
		}

		if (hasOptions && _.has(options, 'startIndex')) {
			if (!_.isNull(options.startIndex) && !NumberUtil.isNumeric(options.startIndex)) {
				throw new Error('ERROR: invalid startIndex option type');
			}
			if (NumberUtil.isNumeric(options.startIndex) && options.startIndex < 0) {
				throw new Error('ERROR: starIndex option must be greater or equal 0');
			}
		}

		if (hasOptions && _.has(options, 'endIndex')) {
			if (!_.isNull(options.endIndex) && !NumberUtil.isNumeric(options.endIndex)) {
				throw new Error('ERROR: invalid endIndex option type');
			}
			if (NumberUtil.isNumeric(options.endIndex) && options.endIndex < 0) {
				throw new Error('ERROR: endIndex option must be greater or equal 0');
			}
		}

		if (hasOptions && _.has(options, 'startIndex') && _.has(options, 'endIndex')) {

			if (!_.isNull(options.startIndex) && !_.isNull(options.endIndex) && options.startIndex >= options.endIndex) {
				throw new Error('ERROR: startIndex must be lower than endIndex');
			}

			if (hasCollection) {
				if (!_.isNull(options.startIndex) && options.startIndex > (collection.length - 1)) {
					throw new Error('ERROR: startIndex out of range');
				}

				if (!_.isNull(options.endIndex) && options.endIndex > (collection.length - 1)) {
					throw new Error('ERROR: endIndex out of range');
				}
			}
		}

	}

}