// Configuration with authentication support for private HF Spaces

export function getApiUrl(): string {
  // Check for explicit URL first
  if (process.env.NEXT_PUBLIC_API_URL) {
    return process.env.NEXT_PUBLIC_API_URL;
  }
  
  // Default for local development
  if (typeof window === 'undefined') {
    return 'http://localhost:8000';
  }
  
  // Auto-detect based on current location
  const currentHost = window.location.hostname;
  
  if (currentHost === 'localhost' || currentHost === '127.0.0.1') {
    return 'http://localhost:8000';
  }
  
  // For production, use the backend URL
  return process.env.NEXT_PUBLIC_API_URL || 'http://localhost:8000';
}

export function getAuthHeaders(): HeadersInit {
  const headers: HeadersInit = {
    'Content-Type': 'application/json',
  };
  
  // Add HF token if available (for private spaces)
  if (process.env.NEXT_PUBLIC_HF_TOKEN) {
    headers['Authorization'] = `Bearer ${process.env.NEXT_PUBLIC_HF_TOKEN}`;
  }
  
  // Add custom API key if configured
  if (process.env.NEXT_PUBLIC_API_KEY) {
    headers['X-API-Key'] = process.env.NEXT_PUBLIC_API_KEY;
  }
  
  return headers;
}

export async function fetchWithAuth(url: string, options: RequestInit = {}): Promise<Response> {
  const authHeaders = getAuthHeaders();
  
  return fetch(url, {
    ...options,
    headers: {
      ...authHeaders,
      ...options.headers,
    },
  });
}