import Notification from './base.js';
const { Notifications } = ags.Service;
const { Button, Label, Box, Icon, Scrollable, Window } = ags.Widget;

const ClearButton = () => Button({
    onClicked: Notifications.clear,
    connections: [[Notifications, button => {
        button.sensitive = Notifications.notifications.length > 0;
    }]],
    child: Box({
        children: [
            Label('Clear '),
            Icon({
                connections: [[Notifications, icon => {
                    icon.icon = Notifications.notifications.length > 0
                        ? 'user-trash-full-symbolic' : 'user-trash-symbolic';
                }]],
            }),
        ],
    }),
});

const Header = () => Box({
    className: 'header',
    children: [
        Label({ label: 'Notifications', hexpand: true, xalign: 0 }),
        ClearButton(),
    ],
});

const NotificationList = () => Box({
    vertical: true,
    vexpand: true,
    connections: [[Notifications, box => {
        box.children = Notifications.notifications
            .reverse()
            .map(n => Notification(n));

        box.visible = Notifications.notifications.length > 0;
    }]],
});

const Placeholder = () => Box({
    className: 'placeholder',
    vertical: true,
    valign: 'center',
    halign: 'center',
    vexpand: true,
    hexpand: true,
    children: [
        Icon('notifications-disabled-symbolic'),
        Label('Your inbox is empty'),
    ],
    connections: [[Notifications, box => {
        box.visible = Notifications.notifications.length === 0;
    }]],
});

export const NotificationCenter = Window({
  name: 'notification-center',
  layer: 'overlay',
  anchor: 'top right',
  className: 'dashboard',
  child: Box({
    className: 'notifications',
    vertical: true,
    children: [
        Header(),
        Box({
            className: 'notification-wallpaper-box',
            children: [Scrollable({
                className: 'notification-list-box',
                hscroll: 'never',
                vscroll: 'automatic',
                child: Box({
                    className: 'notification-list',
                    vertical: true,
                    children: [
                        NotificationList(),
                        Placeholder(),
                    ],
                }),
            })],
        }),
    ],
  }),
});