import { NotificationType } from "@edr/types";
import type { NotificationItemData, NotificationVisual } from "@edr/ui-common";
import { Bell, ClipboardCheck, FileSignature, Inbox, Wallet } from "lucide-react";

const ICON_SIZE = 17;

/**
 * Backoffice notification registry. Maps a notification `type` → icon + Mantine
 * color, and `type`/`data` → an in-app deep link. This is the single place to
 * customize how each staff-facing notification looks and where it goes.
 */
export function resolveNotificationVisual(
  item: NotificationItemData,
): NotificationVisual {
  switch (item.type) {
    case NotificationType.REQUEST_SUBMITTED:
      return { icon: <Inbox size={ICON_SIZE} />, color: "blue" };
    case NotificationType.PAYMENT_RECEIVED:
      return { icon: <Wallet size={ICON_SIZE} />, color: "teal" };
    case NotificationType.CLEARANCE_REVIEW:
      return { icon: <ClipboardCheck size={ICON_SIZE} />, color: "orange" };
    case NotificationType.CONTRACT_STATUS:
      return { icon: <FileSignature size={ICON_SIZE} />, color: "indigo" };
    default:
      return { icon: <Bell size={ICON_SIZE} />, color: "edr-green" };
  }
}

function asId(value: unknown): string | undefined {
  return typeof value === "string" && value.length > 0 ? value : undefined;
}

/**
 * Resolve where clicking a notification navigates. Prefers an explicit
 * server-provided `link`, else derives a `/dashboard/*` route from `type` +
 * `data`. Returns `null` when there's nowhere sensible to go.
 */
export function resolveNotificationHref(
  item: NotificationItemData,
): string | null {
  if (item.link) return item.link;
  const data = item.data ?? {};
  switch (item.type) {
    case NotificationType.REQUEST_SUBMITTED: {
      const bookingId = asId(data.bookingId);
      if (bookingId) return `/dashboard/booking-requests/${bookingId}`;
      const contractId = asId(data.contractId);
      if (contractId) return `/dashboard/contract-requests/${contractId}`;
      return "/dashboard/booking-requests";
    }
    case NotificationType.PAYMENT_RECEIVED: {
      const bookingId = asId(data.bookingId);
      if (bookingId) return `/dashboard/bookings/${bookingId}/clearance`;
      const id = asId(data.customerId);
      return id ? `/dashboard/customers/${id}` : "/dashboard/customers";
    }
    case NotificationType.CLEARANCE_REVIEW: {
      const bookingId = asId(data.bookingId);
      if (bookingId) return `/dashboard/bookings/${bookingId}/clearance`;
      const contractId = asId(data.contractId);
      if (contractId) return `/dashboard/contracts/clearance/${contractId}`;
      return "/dashboard/arrival-queue";
    }
    case NotificationType.CONTRACT_STATUS: {
      const contractId = asId(data.contractId);
      return contractId
        ? `/dashboard/contract-requests/${contractId}`
        : "/dashboard/contract-requests";
    }
    default:
      return null;
  }
}