// Shared notification-drawer state. The bell in the topbar opens the drawer
// via `open()`; the drawer reads from `items` and toggles `unread` via
// `markRead` / `markAllRead`. `unreadCount` powers the red dot on the bell.
//
// All state is in-memory and re-seeds from the NOTIFICATIONS fixture on each
// full reload — there's no backend yet. When the real notifications source
// lands (see follow-ups in NEXT-STEPS.md), swap `items` for a useFetch.

import { NOTIFICATIONS, type NotificationItem } from '~/data/fixtures'

const isOpen = ref(false)
const items = ref<NotificationItem[]>(NOTIFICATIONS.map((n) => ({ ...n })))

const unreadCount = computed(() => items.value.filter((n) => n.unread).length)

export const useNotifications = () => ({
  isOpen,
  items,
  unreadCount,
  open: () => {
    isOpen.value = true
  },
  close: () => {
    isOpen.value = false
  },
  markRead: (id: string) => {
    const i = items.value.find((n) => n.id === id)
    if (i) i.unread = false
  },
  markAllRead: () => {
    for (const n of items.value) n.unread = false
  },
})