/**
 * Central endpoint configuration for the Solace Bank Group PLC portal.
 *
 * All URLs can be overridden at build time via Vite env vars (VITE_*) so the
 * same codebase can target staging / production / local mocks without a rebuild.
 *
 * Live backend status (verified 2026-04-19):
 *   - chain138.rpc              LIVE (Besu QBFT, ChainID 138 / 0x8a)
 *   - explorer.api              LIVE (SolaceScan / Blockscout v2; CORS *)
 *   - proxmox.api               LIVE but CF-Access protected — browser calls
 *                               cannot carry CF-Access JWTs without an SSO flow,
 *                               so this is only reachable via a BFF today.
 *   - dbisCore.api              NOT DEPLOYED (api.dbis-core.d-bis.org 404/DNS)
 */

export interface EndpointConfig {
  chain138: {
    rpcUrl: string;
    chainId: number;
    chainIdHex: `0x${string}`;
    name: string;
    nativeCurrency: { name: string; symbol: string; decimals: number };
    blockExplorerUrl: string;
  };
  explorer: {
    baseUrl: string;
    apiBaseUrl: string; // Blockscout v2
  };
  proxmox: {
    apiBaseUrl: string;
    /** proxmox-api.d-bis.org is behind Cloudflare Access — direct browser calls
     *  are blocked. Must be proxied through a BFF that holds a CF-Access
     *  Service Token, or the user must complete CF-Access SSO in-browser. */
    requiresBff: true;
  };
  dbisCore: {
    apiBaseUrl: string;
    /** dbis_core has no deployed public API yet. All methods fall back to
     *  mock data with a console.warn. Flip this to `false` once the core
     *  banking API is stood up. */
    mocked: true;
  };
  orchestrator: {
    /** CurrenciCombo/orchestrator base URL (plan-state + event stream
     *  for /transactions page). Empty string means "not deployed —
     *  fall back to mock demo data". */
    baseUrl: string;
    deployed: boolean;
  };
}

const env = (import.meta as unknown as { env?: Record<string, string> }).env ?? {};

export const endpoints: EndpointConfig = {
  chain138: {
    // Public gateway; `rpc-core.d-bis.org` is a working internal alias.
    rpcUrl: env.VITE_CHAIN138_RPC_URL || 'https://rpc.d-bis.org',
    chainId: 138,
    chainIdHex: '0x8a',
    name: 'DeFi Oracle Meta Mainnet',
    nativeCurrency: { name: 'Meta', symbol: 'META', decimals: 18 },
    blockExplorerUrl: env.VITE_EXPLORER_BASE_URL || 'https://explorer.d-bis.org',
  },
  explorer: {
    baseUrl: env.VITE_EXPLORER_BASE_URL || 'https://explorer.d-bis.org',
    apiBaseUrl: env.VITE_EXPLORER_API_BASE_URL || 'https://api.explorer.d-bis.org',
  },
  proxmox: {
    apiBaseUrl: env.VITE_PROXMOX_API_BASE_URL || 'https://proxmox-api.d-bis.org',
    requiresBff: true,
  },
  dbisCore: {
    apiBaseUrl: env.VITE_DBIS_CORE_API_BASE_URL || 'https://api.dbis-core.d-bis.org',
    mocked: true,
  },
  orchestrator: {
    baseUrl: env.VITE_ORCHESTRATOR_URL || '',
    deployed: Boolean(env.VITE_ORCHESTRATOR_URL),
  },
};

export type BackendStatus = 'live' | 'bff-required' | 'mocked' | 'degraded';

export interface BackendDescriptor {
  id: 'chain138' | 'explorer' | 'proxmox' | 'dbisCore' | 'orchestrator';
  name: string;
  status: BackendStatus;
  url: string;
  note: string;
}

export const backendCatalog: BackendDescriptor[] = [
  {
    id: 'chain138',
    name: 'Chain 138 RPC',
    status: 'live',
    url: endpoints.chain138.rpcUrl,
    note: 'DeFi Oracle Meta Mainnet — Besu / QBFT. Read-only browser calls via ethers.',
  },
  {
    id: 'explorer',
    name: 'SolaceScan Explorer',
    status: 'live',
    url: endpoints.explorer.apiBaseUrl,
    note: 'Blockscout v2 API. CORS * — safe for direct browser calls.',
  },
  {
    id: 'proxmox',
    name: 'Proxmox API',
    status: 'bff-required',
    url: endpoints.proxmox.apiBaseUrl,
    note: 'Live but behind Cloudflare Access. Needs a BFF/service token; mocked in the browser.',
  },
  {
    id: 'dbisCore',
    name: 'DBIS Core Banking',
    status: 'mocked',
    url: endpoints.dbisCore.apiBaseUrl,
    note: 'No public deployment yet. UI falls back to sample portal data.',
  },
  {
    id: 'orchestrator',
    name: 'Transaction Orchestrator',
    status: endpoints.orchestrator.deployed ? 'live' : 'mocked',
    url: endpoints.orchestrator.baseUrl || '(not deployed)',
    note: endpoints.orchestrator.deployed
      ? 'CurrenciCombo orchestrator — plan state + event stream.'
      : 'Orchestrator not yet deployed. /transactions page renders demo plans.',
  },
];