import { useAuthStore } from '@/stores/authStore';

const API_BASE = '/api';

async function request<T>(path: string, options?: RequestInit): Promise<T> {
  const response = await fetch(`${API_BASE}${path}`, {
    headers: {
      'Content-Type': 'application/json',
      ...options?.headers,
    },
    credentials: 'include',
    ...options,
  });

  // On 401, try refreshing JWT first
  if (response.status === 401 && !path.includes('/auth/')) {
    const refreshRes = await fetch(`${API_BASE}/auth/refresh`, { method: 'POST', credentials: 'include' });
    if (refreshRes.ok) {
      const retry = await fetch(`${API_BASE}${path}`, {
        headers: { 'Content-Type': 'application/json', ...options?.headers },
        credentials: 'include',
        ...options,
      });
      if (retry.ok) return retry.json();
    }

    // JWT refresh failed — redirect to login
    useAuthStore.getState().logout();
    window.location.href = '/login';
    throw new Error('Non authentifié');
  }

  if (!response.ok) {
    const error = await response.json().catch(() => ({ message: 'An error occurred' }));
    throw new Error(error.message || `HTTP ${response.status}`);
  }

  return response.json();
}

export const api = {
  get: <T>(path: string) => request<T>(path),
  post: <T>(path: string, body?: unknown) =>
    request<T>(path, { method: 'POST', body: body ? JSON.stringify(body) : undefined }),
  put: <T>(path: string, body?: unknown) =>
    request<T>(path, { method: 'PUT', body: body ? JSON.stringify(body) : undefined }),
  patch: <T>(path: string, body?: unknown) =>
    request<T>(path, { method: 'PATCH', body: body ? JSON.stringify(body) : undefined }),
  delete: <T>(path: string) => request<T>(path, { method: 'DELETE' }),
};