/*! © SpryMedia Ltd, - datatables.net/license */

/**
 * This plug-in will add automatic negative currency detection for currency columns to
 * DataTables. Note that only $, c, £ and € symbols are detected with this code,
 * This plugin has also been updated to automatically detect negative values either those
 * using '-' as well as numbers using '()' to specify negatives.
 * This plugin also includes automatic type detection
 *
 *  @name brackets-negative
 *  @summary Detect data of currency type with a leading currency symbol as well at detect two types of negative number formatting
 *  @author Tom Buckle
 */

import DataTable from 'datatables.net';

// Change this list to the valid characters you want to be detected
var validChars = '$£€c' + '0123456789' + ".-,()'";
// Init the regex just once for speed - it is "closure locked"
var str = DataTable.util.escapeRegex(validChars),
	re = new RegExp('[^' + str + ']');

DataTable.ext.type.detect.unshift(function (data) {
	if (typeof data !== 'string' || re.test(data)) {
		return null;
	}
	return 'currency';
});

DataTable.ext.type.order['currency-pre'] = function (data) {
	if (data === '') {
		return 0;
	}

	//Check if its in the proper format
	if (data.match(/[\()]/g)) {
		if (data.match(/[\-]/g) !== true) {
			//It matched - strip out parentheses & any characters we dont want and append - at front
			data = '-' + data.replace(/[\$£€c\(\),]/g, '');
		}
		else {
			//Already has a '-' so just strip out non-numeric charactors exluding '-'
			data = data.replace(/[^\d\-\.]/g, '');
		}
	}
	else {
		data = data.replace(/[\$£€\,]/g, '');
	}

	return parseFloat(data);
};