import { cookies } from 'next/headers';

export const TOKEN_COOKIE = 'tower_token';
export const MEMBER_COOKIE = 'tower_member_token';
const MEMBER_MAX_AGE_SECONDS = 60 * 60 * 24 * 30;

export function getApiBaseUrl(): string {
  return process.env['API_URL'] ?? 'http://localhost:3001';
}

export async function getToken(): Promise<string | undefined> {
  const store = await cookies();
  return store.get(TOKEN_COOKIE)?.value;
}

export async function getMemberToken(): Promise<string | undefined> {
  const store = await cookies();
  return store.get(MEMBER_COOKIE)?.value;
}

function withAuthHeader(headers: Headers, token: string | undefined): void {
  headers.set('Accept', 'application/json');
  if (token && !headers.has('Authorization')) {
    headers.set('Authorization', `Bearer ${token}`);
  }
}

export async function apiFetch(path: string, init: RequestInit = {}): Promise<Response> {
  const token = await getToken();
  const headers = new Headers(init.headers);
  withAuthHeader(headers, token);
  if (init.body && !headers.has('Content-Type')) {
    headers.set('Content-Type', 'application/json');
  }
  return fetch(`${getApiBaseUrl()}${path}`, { ...init, headers, cache: 'no-store' });
}

export async function memberApiFetch(path: string, init: RequestInit = {}): Promise<Response> {
  const token = await getMemberToken();
  const headers = new Headers(init.headers);
  withAuthHeader(headers, token);
  if (init.body && !headers.has('Content-Type')) {
    headers.set('Content-Type', 'application/json');
  }
  return fetch(`${getApiBaseUrl()}${path}`, { ...init, headers, cache: 'no-store' });
}

export function buildMemberCookie(token: string): string {
  return `${MEMBER_COOKIE}=${token}; Path=/; HttpOnly; SameSite=Lax; Max-Age=${MEMBER_MAX_AGE_SECONDS}`;
}

export function clearMemberCookie(): string {
  return `${MEMBER_COOKIE}=; Path=/; HttpOnly; SameSite=Lax; Max-Age=0`;
}

export function jsonResponse(body: unknown, status = 200, extraHeaders: Record<string, string> = {}): Response {
  return new Response(JSON.stringify(body), {
    status,
    headers: { 'Content-Type': 'application/json', ...extraHeaders },
  });
}