export class SubscriptionManager {
  private currentSubs: any[] = []
  private isActive = false

  async subscribe(relay: any, filters: any[], handlers: {
    onEvent: (event: NostrEvent) => void,
    onEose?: () => void
  }) {
    if (this.isActive) return

    this.isActive = true
    const sub = relay.sub(filters)

    sub.on('event', handlers.onEvent)
    if (handlers.onEose) {
      sub.on('eose', handlers.onEose)
    }

    this.currentSubs.push(sub)
    return sub
  }

  unsubscribe() {
    this.currentSubs.forEach(sub => {
      try {
        if (sub?.unsub) sub.unsub()
      } catch (err) {
        console.error('Failed to unsubscribe:', err)
      }
    })
    this.currentSubs = []
    this.isActive = false
  }
}