import type { RpcConfig } from '../types/common'

/**
 * Production Portal RPC gateway hostname.
 * Staging equivalent: `web.portalhq.dev`.
 * Used as the fallback when neither `gatewayHost` nor `host` is supplied.
 */
export const DEFAULT_RPC_HOST = 'web.portalhq.io'

/**
 * Builds the default Portal-managed RPC gateway config from a given gateway host.
 *
 * URL template: https://{rpcHost}/rpc/v1/{namespace}/{reference}
 *
 * Covers 13 chains — 11 EVM + 2 Solana. Polygon Amoy (eip155:80002) is used;
 * the deprecated Mumbai (eip155:80001) is intentionally excluded.
 *
 * When rpcConfig is undefined or {} in the Portal constructor, this function is
 * called automatically. An explicit non-empty rpcConfig always takes precedence
 * verbatim — no merging with defaults.
 */
export function buildDefaultRpcConfig(
  rpcHost: string = DEFAULT_RPC_HOST,
): RpcConfig {
  const base = `https://${rpcHost}/rpc/v1`
  return {
    'eip155:1': `${base}/eip155/1`,
    'eip155:11155111': `${base}/eip155/11155111`,
    'eip155:137': `${base}/eip155/137`,
    'eip155:80002': `${base}/eip155/80002`,
    'eip155:8453': `${base}/eip155/8453`,
    'eip155:84532': `${base}/eip155/84532`,
    'eip155:143': `${base}/eip155/143`,
    'eip155:10143': `${base}/eip155/10143`,
    'eip155:10': `${base}/eip155/10`,
    'eip155:42161': `${base}/eip155/42161`,
    'eip155:43114': `${base}/eip155/43114`,
    'solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp': `${base}/solana/5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp`,
    'solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1': `${base}/solana/EtWTRABZaYq6iMfeYKouRu166VU2xqa1`,
  }
}