import type { HuntResponse } from './api/types'

// Ensures API datetime strings are always parsed as UTC, even if the Z suffix is missing.
export function parseUTC(iso: string): Date {
  const normalized = /Z$|[+-]\d{2}:?\d{2}$/.test(iso) ? iso : iso + 'Z'
  return new Date(normalized)
}

export function huntStatus(hunt: HuntResponse): 'ONGOING' | 'UNSTARTED' | 'CLOSED' {
  if (hunt.isTerminated) return 'CLOSED'
  const now = Date.now()
  if (now < parseUTC(hunt.startDateTime).getTime()) return 'UNSTARTED'
  if (now > parseUTC(hunt.endDateTime).getTime()) return 'CLOSED'
  return 'ONGOING'
}

export function formatDateTime(iso: string): string {
  return parseUTC(iso).toLocaleDateString(undefined, { month: 'short', day: 'numeric', hour: '2-digit', minute: '2-digit' })
}

export function formatDate(iso: string): string {
  return parseUTC(iso).toLocaleDateString(undefined, { month: 'short', day: 'numeric', year: 'numeric' })
}