import {
  clearTokens,
  getAccessToken,
} from "@/lib/session";

export type WebsiteAuthUser = {
  id: string;
  cellNumber: string;
  email: string | null;
  firstName: string | null;
  lastName: string | null;
  firstNameEn: string | null;
  lastNameEn: string | null;
  roles: string[];
  dashboard: "super_admin" | "business" | "customer";
  businesses: {
    id: string;
    name: string;
    slug: string;
    isOwner: boolean;
  }[];
};

const MESHKEE_API_URL =
  process.env.NEXT_PUBLIC_MESHKEE_API_URL?.replace(/\/$/, "") ||
  "https://api.meshkee.com/api/v1";

export function getCustomerDashboardUrl() {
  return (
    process.env.NEXT_PUBLIC_CUSTOMER_DASHBOARD_URL?.replace(/\/$/, "") ||
    "http://customer.localhost:3002"
  );
}

export function getAdminDashboardUrl() {
  return (
    process.env.NEXT_PUBLIC_ADMIN_DASHBOARD_URL?.replace(/\/$/, "") ||
    process.env.NEXT_PUBLIC_DASHBOARD_URL?.replace(/\/$/, "") ||
    "http://localhost:3002"
  );
}

export function getBusinessDashboardUrl() {
  return (
    process.env.NEXT_PUBLIC_BUSINESS_DASHBOARD_URL?.replace(/\/$/, "") ||
    "http://business.localhost:3002"
  );
}

export function displayNameFor(user: WebsiteAuthUser | null | undefined) {
  if (!user) return "";
  const first = (user.firstNameEn || user.firstName || "").trim();
  const last = (user.lastNameEn || user.lastName || "").trim();
  const full = [first, last].filter(Boolean).join(" ");
  if (full) return full;
  return user.cellNumber || "Account";
}

/** Header label: first name only. */
export function firstNameFor(user: WebsiteAuthUser | null | undefined) {
  if (!user) return "";
  const first = (user.firstNameEn || user.firstName || "").trim();
  if (first) return first.split(/\s+/)[0] || first;
  return user.cellNumber || "Account";
}

export async function fetchCurrentUser(
  signal?: AbortSignal,
): Promise<WebsiteAuthUser | null> {
  const token = getAccessToken();
  if (!token) return null;

  const response = await fetch(`${MESHKEE_API_URL}/auth/me`, {
    headers: { Authorization: `Bearer ${token}` },
    signal,
    cache: "no-store",
  });

  if (response.status === 401 || response.status === 403) {
    clearTokens();
    return null;
  }

  if (!response.ok) return null;

  const payload = (await response.json()) as { user?: WebsiteAuthUser };
  return payload.user ?? null;
}