/**
 * Utility functions for handling behaviour of and data in HTML forms.
 * @module jira/util/forms
 */
define('jira/util/forms', ['jira/util/navigator', 'jira/util/key-code', 'jquery'], function (jiraNavigator, keyCodes, jQuery) {
    'use strict';

    return (/** @alias module:jira/util/forms */{
            /**
             * Submits an element's form if the enter key is pressed
             */
            submitOnEnter: function submitOnEnter(e) {
                if (e.keyCode === keyCodes.ENTER && e.target.form && !e.ctrlKey && !e.shiftKey) {
                    jQuery(e.target.form).submit();
                    return false;
                }
                return true;
            },


            /**
             * Submits an element's form if the enter key and the control key (or cmd on Mac) is pressed
             */
            submitOnCtrlEnter: function submitOnCtrlEnter(e) {
                /*
                 * JRA-45439: Restricts accepting keyCode 10 to Windows and Linux, because only some browsers in Windows and Linux
                 * send keyCode 10 when Ctrl+Enter is clicked, while Ctrl+J sends keyCode 10 in Mac environment. See also the table
                 * mapping our supported browsers and keyCode sent when Ctrl+Enter is clicked:
                 *   - IE/WIN:        10
                 *   - Chrome/Win:    10
                 *   - Firefox/WIN:   13
                 *   - Firefox/Linux: 10
                 *   - Chrome/Mac:    13
                 *   - Firefox/Mac:   13
                 *   - Safari/Mac:    13
                 */
                if ((e.ctrlKey || jiraNavigator.isMac() && e.metaKey) && e.target.form && (e.keyCode === 13 || !jiraNavigator.isMac() && e.keyCode === 10)) {
                    jQuery(e.target.form).submit();
                    return false;
                }
                return true;
            },


            /**
             * Returns a space-delimited value of a select list. There's strangely no in-built way of doing this for multi-selects.
             * @param {HTMLSelectElement} selectObject the <select&rt; element
             * @returns {String}
             */
            getMultiSelectValues: function getMultiSelectValues(selectObject) {
                var selectedValues = '';
                for (var i = 0; i < selectObject.length; i++) {
                    if (selectObject.options[i].selected) {
                        if (selectObject.options[i].value && selectObject.options[i].value.length > 0) {
                            selectedValues = selectedValues + ' ' + selectObject.options[i].value;
                        }
                    }
                }

                return selectedValues;
            },


            /**
             * Returns an array of values from a select list.
             * @param {HTMLSelectElement} selectObject the &lt;select&rt; element
             * @returns {Array}
             */
            getMultiSelectValuesAsArray: function getMultiSelectValuesAsArray(selectObject) {
                var selectedValues = [];
                for (var i = 0; i < selectObject.length; i++) {
                    if (selectObject.options[i].selected) {
                        if (selectObject.options[i].value && selectObject.options[i].value.length > 0) {
                            selectedValues[selectedValues.length] = selectObject.options[i].value;
                        }
                    }
                }
                return selectedValues;
            }
        }
    );
});