export interface StoredEvent {
  eventToken: string
  organizerToken?: string
  title: string
  dateTime: string
  expiryDate: string
}

const STORAGE_KEY = 'fete:events'

function readEvents(): StoredEvent[] {
  try {
    const raw = localStorage.getItem(STORAGE_KEY)
    return raw ? (JSON.parse(raw) as StoredEvent[]) : []
  } catch {
    return []
  }
}

function writeEvents(events: StoredEvent[]): void {
  localStorage.setItem(STORAGE_KEY, JSON.stringify(events))
}

export function useEventStorage() {
  function saveCreatedEvent(event: StoredEvent): void {
    const events = readEvents().filter((e) => e.eventToken !== event.eventToken)
    events.push(event)
    writeEvents(events)
  }

  function getStoredEvents(): StoredEvent[] {
    return readEvents()
  }

  function getOrganizerToken(eventToken: string): string | undefined {
    const event = readEvents().find((e) => e.eventToken === eventToken)
    return event?.organizerToken
  }

  return { saveCreatedEvent, getStoredEvents, getOrganizerToken }
}