/**
 * Relay pool and relay constants.
 * Extracted into its own module to avoid circular dependencies
 * between nostr.ts and accounts.ts.
 */
import { BehaviorSubject } from 'applesauce-core'
import { RelayPool } from 'applesauce-relay'

// Relay pool for all WebSocket connections
export const pool = new RelayPool()

/**
 * Determine app relay URLs at runtime.
 *
 * Priority:
 * 1. VITE_NOSTR_RELAYS env var (set in .env for local dev)
 * 2. Auto-detect: proxy through same host at /relay (Docker / production)
 */
function getAppRelays(): string[] {
  const envRelays = import.meta.env.VITE_NOSTR_RELAYS as string | undefined
  if (envRelays) {
    const parsed = envRelays.split(',').map((r: string) => r.trim()).filter(Boolean)
    if (parsed.length > 0) return parsed
  }

  // Production / Docker: relay is proxied through nginx at /relay
  const protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:'
  return [`${protocol}//${window.location.host}/relay`]
}

// App relays (local dev relay or proxied production relay)
export const APP_RELAYS = getAppRelays()

// Lookup relays for profile metadata
export const LOOKUP_RELAYS = ['wss://purplepag.es']

// Observable relay list for reactive subscriptions
export const appRelays = new BehaviorSubject<string[]>([...APP_RELAYS])