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

/**
 * Rendering methods using the Javascript Intl API. This is supported by IE11,
 * Edge, Chrome, Firefox and Safari 10+. Any browser that does not support the
 * Intl will simply show the unformatted data to the end user.
 *
 * The great advantage of using these methods is that your table's data will
 * automatically be shown to your end user formatted for their locale. For
 * example a date might be formatted as "m/d/yyyy" in the US, while in France
 * it would show as "dd/mm/yyyy".
 *
 * Two rendering methods are available:
 *
 * * `intlNumber` which will format numbers.
 * * `intlDateTime` which formats date times.
 *
 * Both optionally takes two arguments:
 *
 * 1. [Optional] Locale or array of locales
 * 2. [Optional] Formatter options
 *
 * For the supported options please see the MDN documentation for
 * [DateTimeFormat](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DateTimeFormat) and
 * [NumberFormat](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/NumberFormat).
 *
 *  @name intl
 *  @summary Use the Intl Javascript API to render dates and numbers
 *  @author [Allan Jardine](http://datatables.net)
 *  @requires DataTables 1.10+
 *
 *  @example
 *    // Number renderer - using the `columns.render` option:
 *    render: DataTable.render.intlNumber()
 *
 *  @example
 *    // Number renderer - with specified locale:
 *    render: DataTable.render.intlNumber('de')
 *
 *  @example
 *    // Number renderer - with specified locale and options:
 *    render: DataTable.render.intlNumber('de', {
 *      style: 'currency',
 *      currency: 'USD'
 *    } )
 *
 *
 *  @example
 *    // Date time renderer - using the `columns.render` option:
 *    render: DataTable.render.intlDateTime()
 *
 *  @example
 *    // Date time renderer - with specified locale:
 *    render: DataTable.render.intlDateTime('en-US')
 *
 *  @example
 *    // Date time renderer - with specified locale and options:
 *    render: DataTable.render.intlDateTime('de', {
 *      weekday: 'long'
 *    } )
 *
 */

import DataTable from 'datatables.net';

declare module 'datatables.net' {
	interface DataTablesStaticRender {
		/** Use the Intl Javascript API to render dates and times */
		intlDateTime(locale: string, options: Intl.DateTimeFormatOptions);

		/** Use the Intl Javascript API to render numbers */
		intlNumber(locale: string, options: Intl.NumberFormatOptions);
	}
}

DataTable.render.intlDateTime = function (locale, options) {
	if (window.Intl) {
		var formatter = new Intl.DateTimeFormat(locale, options);

		return function (data, type) {
			var date;

			if (typeof data === 'string') {
				date = Date.parse(data);
			}
			else if (data instanceof Date) {
				date = data;
			}

			if (isNaN(date) || type === 'type' || type === 'sort') {
				return data;
			}

			return formatter.format(date);
		};
	}
	else {
		return function (d) {
			return d;
		};
	}
};

DataTable.render.intlNumber = function (locale, options) {
	if (window.Intl) {
		var formatter = new Intl.NumberFormat(locale, options);

		return function (d, type) {
			if (type === 'display') {
				return formatter.format(d);
			}
			else if (type === 'filter') {
				return d + ' ' + formatter.format(d);
			}
			return d;
		};
	}
	else {
		return function (d) {
			return d;
		};
	}
};
