import { getToken, setToken } from './auth-storage';

export const API_URL = import.meta.env.VITE_API_URL ?? 'http://localhost:3000';

export class ApiError extends Error {
  constructor(
    public status: number,
    message: string
  ) {
    super(message);
    this.name = 'ApiError';
  }
}

export async function apiFetch<T>(path: string, init: RequestInit = {}): Promise<T> {
  const token = getToken();
  const headers = new Headers(init.headers);
  if (token) headers.set('Authorization', `Bearer ${token}`);
  if (init.body && !headers.has('Content-Type')) headers.set('Content-Type', 'application/json');
  const res = await fetch(`${API_URL}${path}`, { ...init, headers });
  if (!res.ok) throw new ApiError(res.status, `Request failed: ${res.status}`);
  const text = await res.text();
  return (text ? JSON.parse(text) : undefined) as T;
}

// Sign in: POST /api/auth/sign-in/email, capture the bearer token from the response header.
export async function signIn(email: string, password: string): Promise<void> {
  const res = await fetch(`${API_URL}/api/auth/sign-in/email`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ email, password }),
  });
  if (!res.ok) throw new ApiError(res.status, 'Inloggen mislukt');
  const token = res.headers.get('set-auth-token');
  if (!token) throw new ApiError(500, 'Geen token ontvangen');
  setToken(token);
}