/** 登录态：首价后补充信息确认窗口（对客户不暴露时限/渠道细节） */

/**
 * 决策窗：与总窗口对齐，前端不再单独倒计时逼迫用户。
 * 驻留页仍需 Redis/浏览器 TTL；过短会导致填写中会话被清。
 */
export const MS_REFINE_DECISION_MS = 3_600_000;

/** 自首次驻留起的会话保留窗口（1 小时；仅内部资源回收，不对客户提示） */
export const MS_REFINE_TOTAL_MS = 3_600_000;

export const MS_REFINE_HOLD_REDIS_PREFIX = "ms_refine_hold:";

export type MsRefineHoldState = {
  quote_id: string;
  quote_session_id: string;
  customer_id: string;
  parked_at_ms: number;
  decision_deadline_ms: number;
  total_deadline_ms: number;
  /** awaiting_decision | filling | refining | declined | refined | expired */
  status:
    | "awaiting_decision"
    | "filling"
    | "refining"
    | "declined"
    | "refined"
    | "expired";
};

export type MsRefineHoldPublic = {
  available: boolean;
  quote_session_id: string;
  decision_deadline_ms: number;
  total_deadline_ms: number;
  decision_remaining_ms: number;
  total_remaining_ms: number;
};

export function buildMsRefineHoldState(input: {
  quoteId: string;
  sessionId: string;
  customerId: string;
  nowMs?: number;
}): MsRefineHoldState {
  const now = input.nowMs ?? Date.now();
  return {
    quote_id: input.quoteId,
    quote_session_id: input.sessionId,
    customer_id: input.customerId,
    parked_at_ms: now,
    decision_deadline_ms: now + MS_REFINE_DECISION_MS,
    total_deadline_ms: now + MS_REFINE_TOTAL_MS,
    status: "awaiting_decision",
  };
}

export function toMsRefineHoldPublic(
  state: MsRefineHoldState,
  nowMs = Date.now(),
): MsRefineHoldPublic {
  const decision_remaining_ms = Math.max(0, state.decision_deadline_ms - nowMs);
  const total_remaining_ms = Math.max(0, state.total_deadline_ms - nowMs);
  /** filling/refining 期间始终可用，避免填写过程中因倒计时丢失提交入口 */
  const available =
    state.status === "refining" ||
    state.status === "filling" ||
    (state.status === "awaiting_decision" && total_remaining_ms > 0);
  return {
    available,
    quote_session_id: state.quote_session_id,
    decision_deadline_ms: state.decision_deadline_ms,
    total_deadline_ms: state.total_deadline_ms,
    decision_remaining_ms,
    total_remaining_ms,
  };
}

/**
 * 不再因决策窗自动放弃：用户可随时选择继续或放弃。
 * （保留函数签名，兼容 GET/服务层调用）
 */
export function shouldAutoDeclineRefineHold(
  _state: MsRefineHoldState,
  _nowMs = Date.now(),
): boolean {
  return false;
}

/** 内部会话窗口是否已过（资源回收 / 降级重查用，不对客户直出） */
export function isMsRefineHoldExpired(
  state: MsRefineHoldState,
  nowMs = Date.now(),
): boolean {
  return nowMs >= state.total_deadline_ms;
}

/** 倒计时文案（内部/兼容；客户 UI 不再展示） */
export function formatMsRefineRemainingLabel(
  deadlineMs: number,
  nowMs = Date.now(),
): string {
  const sec = Math.max(0, Math.ceil((deadlineMs - nowMs) / 1000));
  const m = Math.floor(sec / 60);
  const s = sec % 60;
  return m > 0 ? `${m}分${String(s).padStart(2, "0")}秒` : `${s}秒`;
}

/** 客户可见提示（禁止：超时 / 二级 / 官网 / Save&update 等敏感词） */
export const MS_REFINE_MSG = {
  decisionTimeout: "请补充必要信息后重新获取报价",
  totalTimeout: "请补充必要信息后重新获取报价",
  totalTimeoutApi: "暂时无法获取报价，请稍后重试",
  decisionTimeoutApi: "暂时无法获取报价，请稍后重试",
  sessionGone: "报价会话已失效，请重新询价",
} as const;

/** 一级无价、需补详情后刷价（落库 error_code，status=done） */
export const MS_NEEDS_DETAILS_ERROR_CODE = "MS_NEEDS_DETAILS" as const;

export const MS_NEEDS_DETAILS_MESSAGE =
  "请补充必要信息后重新获取报价";