openerp.pad = function(instance) {
    var _t = instance.web._t;
    
    instance.web.form.FieldPad = instance.web.form.AbstractField.extend(instance.web.form.ReinitializeWidgetMixin, {
        template: 'FieldPad',
        content: "",
        init: function() {
            var self = this;
            this._super.apply(this, arguments);
            this._configured_deferred = this.view.dataset.call('pad_is_configured').done(function(data) {
                self.set("configured", !!data);
            }).fail(function(data, event) {
                event.preventDefault();
                self.set("configured", true);
            });
        },
        initialize_content: function() {
            var self = this;
            this.$('.oe_pad_switch').click(function() {
                self.$el.toggleClass('oe_pad_fullscreen');
                self.$el.find('.oe_pad_switch').toggleClass('fa-expand fa-compress');
                self.view.$el.find('.oe_chatter').toggle();
            });
            this._configured_deferred.always(function() {
                var configured = self.get('configured');
                self.$(".oe_unconfigured").toggle(!configured);
                self.$(".oe_configured").toggle(configured);
            });
            this.render_value();
        },
        render_value: function() {
            var self = this;
            this._configured_deferred.always(function() {
                if (! self.get('configured')) {
                    return;
                };
                var value = self.get('value');
                if (self.get('effective_readonly')) {
                    if (_.str.startsWith(value, 'http')) {
                        this.pad_loading_request = self.view.dataset.call('pad_get_content', {url: value}).done(function(data) {
                            self.$('.oe_pad_content').removeClass('oe_pad_loading').html('<div class="oe_pad_readonly"><div>');
                            self.$('.oe_pad_readonly').html(data);
                        }).fail(function() {
                            self.$('.oe_pad_content').text(_t('Unable to load pad'));
                        });
                    } else {
                        self.$('.oe_pad_content').addClass('oe_pad_loading').show().text(_t("This pad will be initialized on first edit"));
                    }
                }
                else {
                    var def = $.when();
                    if (! value || !_.str.startsWith(value, 'http')) {
                        def = self.view.dataset.call('pad_generate_url', {
                            context: {
                                model: self.view.model,
                                field_name: self.name,
                                object_id: self.view.datarecord.id
                            },
                        }).done(function(data) {
                            if (! data.url) {
                                self.set("configured", false);
                            } else {
                                self.set("value", data.url);
                            }
                        });
                    }
                    def.then(function() {
                        value = self.get('value');
                        if (_.str.startsWith(value, 'http')) {
                            var content = '<iframe width="100%" height="100%" frameborder="0" src="' + value + '?showChat=false&userName=' + self.session.username + '"></iframe>';
                            self.$('.oe_pad_content').html(content);
                            self._dirty_flag = true;
                        }
                        else {
                            self.$('.oe_pad_content').text(value);
                        }
                    });
                }
            });
        },
    });

    instance.web.form.widgets = instance.web.form.widgets.extend({
        'pad': 'instance.web.form.FieldPad',
    });
};