export const WORK_ORDER_ACCEPTANCE_MODE = {
  STANDARD: 'standard',
  FRIEND_GIFT: 'friend_gift',
} as const

export type WorkOrderAcceptanceMode =
  | (typeof WORK_ORDER_ACCEPTANCE_MODE)[keyof typeof WORK_ORDER_ACCEPTANCE_MODE]
  | (string & {})

export const DEFAULT_GIFT_COOLDOWN_HOURS = 72
export const MAX_GIFT_COOLDOWN_HOURS = 24 * 30
export const MAX_GIFT_COOLDOWN_MINUTES = MAX_GIFT_COOLDOWN_HOURS * 60

/** 好友赠送模式的落库阶段；gift_ready 由 gift_available_at 到点后实时计算，不落库。 */
export const WORK_ORDER_GIFT_PHASE = {
  MATERIAL_REQUIRED: 'material_required',
  MATERIAL_SUBMITTED: 'material_submitted',
  FRIEND_COUNTDOWN: 'friend_countdown',
  GIFT_READY: 'gift_ready',
} as const

export type WorkOrderGiftPhase =
  | (typeof WORK_ORDER_GIFT_PHASE)[keyof typeof WORK_ORDER_GIFT_PHASE]
  | (string & {})

export function normalizeWorkOrderAcceptanceMode(value: unknown): WorkOrderAcceptanceMode {
  const mode = String(value || '').trim()
  return mode === WORK_ORDER_ACCEPTANCE_MODE.FRIEND_GIFT
    ? WORK_ORDER_ACCEPTANCE_MODE.FRIEND_GIFT
    : WORK_ORDER_ACCEPTANCE_MODE.STANDARD
}

export function isFriendGiftAcceptanceMode(value: unknown): boolean {
  return normalizeWorkOrderAcceptanceMode(value) === WORK_ORDER_ACCEPTANCE_MODE.FRIEND_GIFT
}

/** 冷却小时数收敛到 [0, 30 天]，默认 3 天。0 用于选择按分钟配置。 */
export function normalizeWorkOrderGiftCooldownHours(value: unknown): number {
  const hours = Number(value)
  if (!Number.isFinite(hours) || hours < 0) return DEFAULT_GIFT_COOLDOWN_HOURS
  return Math.min(MAX_GIFT_COOLDOWN_HOURS, Math.round(hours))
}

/** 按分钟配置时的总分钟数，最大 30 天。 */
export function normalizeWorkOrderGiftCooldownMinutes(value: unknown): number {
  const minutes = Number(value)
  if (!Number.isFinite(minutes)) return 0
  return Math.min(MAX_GIFT_COOLDOWN_MINUTES, Math.max(0, Math.round(minutes)))
}

export type WorkOrderGiftSource = {
  acceptance_mode?: string | null
  gift_phase?: string | null
  gift_available_at?: string | null
  friend_added_at?: string | null
}

export function isWorkOrderGiftAvailable(source: WorkOrderGiftSource): boolean {
  if (!isFriendGiftAcceptanceMode(source.acceptance_mode)) return false
  const availableAt = Date.parse(String(source.gift_available_at || ''))
  return Number.isFinite(availableAt) && availableAt <= Date.now()
}

/** 好友赠送单已由后台确认加好友后，取消/脱离打手不再退还押金，押金只能经验收结算。 */
export function isWorkOrderGiftDepositForfeitable(source: WorkOrderGiftSource): boolean {
  return isFriendGiftAcceptanceMode(source.acceptance_mode) && Boolean(source.friend_added_at)
}

/** 返回当前赠送阶段；冷却到点后返回实时计算的 gift_ready。 */
export function resolveWorkOrderGiftPhase(source: WorkOrderGiftSource): string {
  if (!isFriendGiftAcceptanceMode(source.acceptance_mode)) return ''
  const phase = String(source.gift_phase || '').trim()
  if (phase === WORK_ORDER_GIFT_PHASE.FRIEND_COUNTDOWN && isWorkOrderGiftAvailable(source)) {
    return WORK_ORDER_GIFT_PHASE.GIFT_READY
  }
  return phase
}