const getBaseUrl = (): string => {
  if (typeof window !== 'undefined') {
    const host = window.location.hostname;
    if (host !== 'localhost' && host !== '127.0.0.1') {
      return '';
    }
  }
  if (process.env.NODE_ENV === 'production') {
    return '';
  }
  return process.env.NEXT_PUBLIC_API_URL || 'http://localhost:8000';
};

const rawBaseUrl = getBaseUrl();
const API_BASE_URL = rawBaseUrl.replace(/\/api\/v1\/?$/, '').replace(/\/+$/, '');

export const API_ENDPOINTS = {
  // Auth
  AUTH_LOGIN: '/api/v1/auth/login',
  AUTH_REFRESH: '/api/v1/auth/refresh',
  AUTH_LOGOUT: '/api/v1/auth/logout',

  // Users
  USERS_CREATE: '/api/v1/users/create',
  USERS_ALL: '/api/v1/users/all',
  USERS_PROFILE: (id: string) => `/api/v1/users/profile/${id}`,
  USERS_UPDATE: (id: string) => `/api/v1/users/update/${id}`,
  USERS_DELETE: (id: string) => `/api/v1/users/delete/${id}`,

  // Admin Security
  ADMIN_LIST_SESSIONS: '/api/v1/admin/list_sessions',
  ADMIN_REVOKE_SESSION: '/api/v1/admin/revoke_session',
  ADMIN_KILL_SWITCH: '/api/v1/admin/request_kill_switch',
  ADMIN_CANCEL_KILL_SWITCH: '/api/v1/admin/cancel_kill_switch',
  ADMIN_SELF_DESTRUCT: '/api/v1/admin/self_destruct',
  ADMIN_FAILED_LOGINS: '/api/v1/admin/failed-logins',
  ADMIN_AUDIT_LOGS: '/api/v1/admin/audit-logs',
  DASHBOARD_STATS: '/api/v1/dashboard/stats',

  // Settings
  SETTINGS_CREATE: '/api/v1/settings/create',
  SETTINGS_PUBLIC: '/api/v1/settings/public',
  SETTINGS_BY_KEY: (key: string) => `/api/v1/settings/key/${key}`,
  SETTINGS_UPDATE: (key: string) => `/api/v1/settings/update/${key}`,

  // MFA
  MFA_SETUP: '/api/v1/mfa/setup',
  MFA_VERIFY: '/api/v1/mfa/verify',

  // Files
  FILES_UPLOAD: '/api/v1/files/upload',
  FILES_BY_ENTITY: (type: string, id: string) => `/api/v1/files/entity/${type}/${id}`,
  FILES_DELETE: (id: string) => `/api/v1/files/delete/${id}`,

  // Geo
  GEO_COUNTRIES: '/api/v1/geo/countries',
  GEO_STATES: (countryId: number) => `/api/v1/geo/countries/${countryId}/states`,
  GEO_CITIES: (stateId: number) => `/api/v1/geo/states/${stateId}/cities`,

  // Role & Permissions Control
  ROLE_PERM_ROLES_ALL: '/api/v1/role-permissions/roles/all',
  ROLE_PERM_ROLES_CREATE: '/api/v1/role-permissions/roles/create',
  ROLE_PERM_ROLES_DELETE: (id: string) => `/api/v1/role-permissions/roles/delete/${id}`,
  ROLE_PERM_PERMISSIONS_ALL: '/api/v1/role-permissions/permissions/all',
  ROLE_PERM_ROLE_GET_PERMISSIONS: (id: string) => `/api/v1/role-permissions/roles/${id}/permissions`,
  ROLE_PERM_ROLE_SET_PERMISSIONS: (id: string) => `/api/v1/role-permissions/roles/${id}/permissions`,

  // Catalog, Devices, and Inventory Control
  CATALOG_BRANDS_ALL: '/api/v1/catalog/brands/all',
  CATALOG_BRANDS_CREATE: '/api/v1/catalog/brands/create',
  CATALOG_CATEGORIES_ALL: '/api/v1/catalog/categories/all',
  CATALOG_CATEGORIES_CREATE: '/api/v1/catalog/categories/create',
  CATALOG_PARTS_ALL: '/api/v1/catalog/parts/all',
  CATALOG_PARTS_CREATE: '/api/v1/catalog/parts/create',
  CATALOG_DEVICE_SERIES_ALL: '/api/v1/catalog/device-series/all',
  CATALOG_DEVICE_SERIES_CREATE: '/api/v1/catalog/device-series/create',
  CATALOG_DEVICE_MODELS_ALL: '/api/v1/catalog/device-models/all',
  CATALOG_DEVICE_MODELS_CREATE: '/api/v1/catalog/device-models/create',
  CATALOG_SERVICE_TYPES_ALL: '/api/v1/catalog/service-types/all',
  CATALOG_SERVICE_TYPES_CREATE: '/api/v1/catalog/service-types/create',
  CATALOG_REPAIR_SERVICES_ALL: '/api/v1/catalog/repair-services/all',
  CATALOG_REPAIR_SERVICES_CREATE: '/api/v1/catalog/repair-services/create',
  CATALOG_REPAIR_VARIANTS_ALL: '/api/v1/catalog/repair-variants/all',
  CATALOG_REPAIR_VARIANTS_CREATE: '/api/v1/catalog/repair-variants/create',
  CATALOG_STOCK_HISTORY: '/api/v1/catalog/stock-movements/history',
  CATALOG_STOCK_ADJUST: '/api/v1/catalog/stock-movements/adjust',
  CATALOG_PO_ALL: '/api/v1/catalog/purchase-orders/all',
  CATALOG_PO_CREATE: '/api/v1/catalog/purchase-orders/create',
  CATALOG_PO_RECEIVE: (id: string) => `/api/v1/catalog/purchase-orders/${id}/receive`,
  CATALOG_ATTRIBUTES_ALL: '/api/v1/catalog/attributes/all',
  CATALOG_ATTRIBUTES_CREATE: '/api/v1/catalog/attributes/create',
  CATALOG_PRODUCTS_ALL: '/api/v1/catalog/products/all',
  CATALOG_PRODUCTS_CREATE: '/api/v1/catalog/products/create',
  CATALOG_BRANDS_UPDATE: (id: string) => `/api/v1/catalog/brands/update/${id}`,
  CATALOG_CATEGORIES_UPDATE: (id: string) => `/api/v1/catalog/categories/update/${id}`,
  CATALOG_DEVICE_SERIES_UPDATE: (id: string) => `/api/v1/catalog/device-series/update/${id}`,
  CATALOG_DEVICE_MODELS_UPDATE: (id: string) => `/api/v1/catalog/device-models/update/${id}`,
  CATALOG_SERVICE_TYPES_UPDATE: (id: string) => `/api/v1/catalog/service-types/update/${id}`,
  CATALOG_REPAIR_SERVICES_UPDATE: (id: string) => `/api/v1/catalog/repair-services/update/${id}`,
  CATALOG_REPAIR_VARIANTS_UPDATE: (id: string) => `/api/v1/catalog/repair-variants/update/${id}`,
  CATALOG_ATTRIBUTES_UPDATE: (id: string) => `/api/v1/catalog/attributes/update/${id}`,
  CATALOG_PRODUCTS_UPDATE: (id: string) => `/api/v1/catalog/products/update/${id}`,
  CATALOG_PRODUCTS_DELETE: (id: string) => `/api/v1/catalog/products/${id}`,
  CATALOG_CATEGORIES_DELETE: (id: string) => `/api/v1/catalog/categories/${id}`,
  CATALOG_BRANDS_DELETE: (id: string) => `/api/v1/catalog/brands/${id}`,
  CATALOG_DEVICE_SERIES_DELETE: (id: string) => `/api/v1/catalog/device-series/${id}`,
  CATALOG_DEVICE_MODELS_DELETE: (id: string) => `/api/v1/catalog/device-models/${id}`,
  CATALOG_ATTRIBUTES_DELETE: (id: string) => `/api/v1/catalog/attributes/${id}`,
  INVENTORY_SKUS: '/api/v1/inventory/skus',
  INVENTORY_ADJUST: '/api/v1/inventory/adjust',
} as const;

export { API_BASE_URL };

/**
 * Resolves a media URL returned by the backend.
 * If already absolute (http/https), returned as-is.
 * If relative (e.g. /uploads/...), returned as-is so Next.js rewrites
 * can proxy it transparently to the production media server.
 */
export function getMediaUrl(url: string | null | undefined): string {
  if (!url) return '';
  const cleanUrl = url.trim();
  if (!cleanUrl) return '';
  if (cleanUrl.startsWith('http://') || cleanUrl.startsWith('https://') || cleanUrl.startsWith('//')) return cleanUrl;
  if (cleanUrl.startsWith('/uploads/')) return cleanUrl;
  if (cleanUrl.startsWith('uploads/')) return `/${cleanUrl}`;
  const path = cleanUrl.startsWith('/') ? cleanUrl.slice(1) : cleanUrl;
  return `/uploads/${path}`;
}