(function(ns) {
    "use strict";
    /**
     * @alias app.company.admin.Form
     * @constructor
     */
    ns.Form = function () { this.construct.apply(this, arguments); };

    ns.Form.prototype.construct = function (options) {
        this.eventNS = 'companyAdmin';

        this.options = $.extend({
            typeField: '',
            utilityCategoryField: '',
            associateCategoryField: '',
            districtDataUrl: '',
            districtFields: [],
            districtAutocompleteOptions: {

            }
        }, options);

        this.form = $('#' + this.options.formId);
        if (!this.form.length) {
            return false;
        }

        this.form.defaultHint(this.options.hintOptions);
        this.typeFields = $('[name=' + this.options.typeField + ']', this.form);

        this.associateCategoryLabel = $('#' + this.options.associateCategoryField + '-label label');

        this.initDistrictFields();
        this.initTypeField();

        return true;
    };

    ns.Form.prototype.initDistrictFields = function () {
        if (!this.options.districtFields.length || !this.options.districtDataUrl) {
            return false;
        }

        var obj = this;

        for (var i in this.options.districtFields) {
            $('#' + this.options.districtFields[i])
                .bind('keydown.' + this.eventNS, function (event) {
                    /* don't navigate away from the field on tab when selecting an item */
                    if ( event.keyCode === $.ui.keyCode.TAB && $(this).data("ui-autocomplete" ).menu.active ) {
                        event.preventDefault();
                    }
                })
                .bind('focus.' + this.eventNS, function (event) {
                    var val = $(this).val();
                    if (val) {
                        $(this).val(_.str.trim(val, ', ') + ', ');
                    }
                    $(this).autocomplete('search', $(this).val());
                })
                .bind('blur.' + this.eventNS, function (event) {
                    $(this).val(_.str.trim($(this).val(), ', '));
                })
                .autocomplete({
                    minLength: 0,
                    source: function (request, response) {
                        $.ajax(obj.options.districtDataUrl, {
                            dataType: "json",
                            data: {
                                term:         request.term,
                                districtType: this.element.data('type')
                            }
                        }).done(response);
                    },
                    focus: function () {
                        /* prevent value inserted on focus */
                        return false;
                    },
                    select: function(event, ui) {
                        var terms = this.value.split( /[,\s]+/ );

                        /* remove the current input */
                        terms.pop();

                        /* add the selected item */
                        terms.push(ui.item.value);

                        this.value = terms.join(', ');

                        return false;
                    }
                });
        }

        return true;
    };

    ns.Form.prototype.initTypeField = function () {
        this.typeFields.bind('click.' + this.eventNS, _.bind(this.onTypeChanged, this));
        this.onTypeChanged();
    };

    ns.Form.prototype.onTypeChanged = function () {
        this.associateCategoryLabel.removeClass('required');
        var positionLabel = $('#position-label > label');
        switch (this.typeFields.filter(':checked').val()) {
            case 'vendor':
                this.associateCategoryLabel.addClass('required');
                break;
            case 'associate':
                positionLabel.switchClass('required', 'optional');
                break;
            default:
                positionLabel.switchClass('optional', 'required');
            break;
        }
    };

})(qs.defineNS('app.company.admin'));