/**
 * data.ts —— mock 数据源（academic-mock-plan §6 数据策略 + §4 行为契约）。
 *
 * 定位：dev 会话内单例内存数据（刷新即重置，不落 localStorage）。承载：
 *   - 固定作用域实体（3 校区 / 10 用户，与原型一致）；
 *   - 账户余额（全局 + 校区，分整数）；
 *   - 资金流水（每用户 320 条 → 覆盖分页边界：total>200 / pageSize 上限 200 / 越界页空集）；
 *   - 活动 / 课程排班 / 分账树 / 课酬方案 / 资金工单（工单驱动资金操作）；
 *   - 幂等存储（同 requestId 重复提交 → repeated=true）+ 余额/流水的可变状态（充值/退费/清零/转结改余额并追加流水）。
 *
 * 契约对齐（academic-frontend-contract-v1.md，冻结）：
 *   - 流水 type 编码 = §10.2 编码表（100 充值 + / 101,201 消费 − / 207 退费 − / 208 清零 − / 106,206 转结 等）；
 *   - 金额恒**分**整数存、对外输出**字符串两位小数**（money.ts）；
 *   - 时间恒 RFC3339 +08:00（time.ts）；用户 ID 字符串、业务主键 int64、单号 bizNo 字符串。
 *
 * 本文件仅在 dev + VITE_API_MOCK 下被加载（http.ts 动态 import 门控），不进 dist。
 */
import { fmt, toCents } from '@/api/mock/money';
import { rfc3339 } from '@/api/mock/time';

/* ================= 种子随机（确定性，保证每次会话数据一致） ================= */
function mulberry32(seed: number): () => number {
  let a = seed | 0;
  return () => {
    a = (a + 0x6d2b79f5) | 0;
    let t = Math.imul(a ^ (a >>> 15), 1 | a);
    t = (t + Math.imul(t ^ (t >>> 7), 61 | t)) ^ t;
    return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
  };
}
const rand = mulberry32(20261109);
const randInt = (min: number, max: number): number => Math.floor(rand() * (max - min + 1)) + min;
const pick = <T>(arr: readonly T[]): T => arr[Math.floor(rand() * arr.length)];

/** 基准时刻：2026-11-09T12:00:00+08:00（数据在其前 60 天分布，确定性） */
const BASE_MS = Date.parse('2026-11-09T12:00:00+08:00');

/* ================= 作用域实体 ================= */
export interface MockCampus {
  campusId: number;
  institutionId: number;
  name: string;
}
export interface MockUser {
  /** canonical_user_id（ULID 26 位字符串，契约 §1.5） */
  userId: string;
  realName: string;
  personType: string;
  /** 脱敏手机号 */
  phone: string;
  /** 归属校区（mock 简化：每用户主校区） */
  campusId: number;
  role: string;
}

export const campuses: MockCampus[] = [
  { campusId: 11, institutionId: 1, name: '滨江校区' },
  { campusId: 12, institutionId: 1, name: '城西校区' },
  { campusId: 13, institutionId: 1, name: '高新校区' },
];

// 契约 §1.5：canonical_user_id 恒 26 位 ULID（E8：原生成 23~24 位，补到 26）。
const ulid = (n: number): string => `01J2M${String(n).padStart(21, '0')}`;

export const users: MockUser[] = [
  { userId: ulid(101), realName: '张婷', personType: 'staff', phone: '135****3322', campusId: 11, role: 'teacher' },
  { userId: ulid(102), realName: '李强', personType: 'staff', phone: '135****4477', campusId: 12, role: 'teacher' },
  { userId: ulid(201), realName: '王梓涵', personType: 'student', phone: '139****2211', campusId: 11, role: 'student' },
  { userId: ulid(202), realName: '陈一诺', personType: 'student', phone: '137****6644', campusId: 11, role: 'student' },
  { userId: ulid(203), realName: '李沐宸', personType: 'student', phone: '138****9900', campusId: 12, role: 'student' },
  { userId: ulid(204), realName: '赵雨桐', personType: 'student', phone: '136****5511', campusId: 11, role: 'student' },
  { userId: ulid(205), realName: '刘子墨', personType: 'student', phone: '133****7788', campusId: 12, role: 'student' },
  { userId: ulid(301), realName: '周敏', personType: 'staff', phone: '132****8899', campusId: 11, role: 'academic' },
  { userId: ulid(302), realName: '财务管理员', personType: 'staff', phone: '131****6633', campusId: 11, role: 'finance' },
  { userId: ulid(303), realName: '超级管理员', personType: 'staff', phone: '130****1122', campusId: 11, role: 'super_admin' },
];

/** 合法作用域校验（mock 侧 1004 越界判定：campusId 不在集合或 institutionId 不在 {1,0} → 越界）。 */
export function inScope(institutionId: number, campusId: number | undefined | null): boolean {
  if (institutionId !== 1 && institutionId !== 0) return false;
  if (campusId === undefined || campusId === null || campusId === 0) return true;
  return campuses.some((c) => c.campusId === campusId);
}

export function findUser(userId: string): MockUser | undefined {
  return users.find((u) => u.userId === userId);
}
export function findCampus(campusId: number): MockCampus | undefined {
  return campuses.find((c) => c.campusId === campusId);
}

/* ================= 账户余额（分整数；全局 + 校区） ================= */
interface Account {
  totalBalance: number;
  campusBalance: number;
}
const accounts = new Map<string, Account>(); // key = `${userId}@${campusId}`

function accountKey(userId: string, campusId: number): string {
  return `${userId}@${campusId}`;
}
function ensureAccount(userId: string, campusId: number, total: number, campus: number): Account {
  const k = accountKey(userId, campusId);
  let a = accounts.get(k);
  if (!a) {
    a = { totalBalance: total, campusBalance: campus };
    accounts.set(k, a);
  }
  return a;
}
function getUserTotal(userId: string): number {
  let sum = 0;
  for (const c of campuses) sum += accounts.get(accountKey(userId, c.campusId))?.totalBalance ?? 0;
  return sum;
}

/** 初始化账户：学生/老师有正余额（可退/可清零），1 名 0 余额（3102 触发），1 名负余额。 */
(function seedAccounts() {
  const students = users.filter((u) => u.personType === 'student');
  students.forEach((u, i) => {
    // 王梓涵(201) 滨江：正余额；陈一诺(202) 滨江：0 余额（3102）；其余正
    const campusTotal = i === 1 ? 0 : randInt(800, 4000) * 100; // 800~4000 元
    ensureAccount(u.userId, u.campusId, campusTotal, i === 1 ? 0 : Math.floor(campusTotal * 0.6));
    // 部分学生在另一校区也有账户
    if (i % 2 === 0) {
      const other = campuses.find((c) => c.campusId !== u.campusId)!;
      ensureAccount(u.userId, other.campusId, Math.floor(campusTotal * 0.4), 0);
    }
  });
  // 李沐宸(203) 额外给一个负余额校区（3120 清零前置：校区余额>全局 或 余额≤0 场景）
  ensureAccount(ulid(203), 13, -5000, 30000);
})();

export function getAccount(userId: string, campusId: number): { total: number; campus: number } {
  const a = accounts.get(accountKey(userId, campusId));
  return { total: a?.totalBalance ?? 0, campus: a?.campusBalance ?? 0 };
}
/** 当前作用域内的全局余额（campusId=0 表示机构级聚合）。 */
export function getGlobalBalance(userId: string, campusId: number): number {
  if (campusId && campusId > 0) return getAccount(userId, campusId).total;
  return getUserTotal(userId);
}

/* ================= 资金流水（t_user_expense_log 形态） ================= */
export interface ExpenseLog {
  id: number;
  userId: string;
  institutionId: number;
  campusId: number;
  /** 流水 type（§10.2 编码表） */
  type: number;
  /** 金额（分，含方向符号：充值/坏账 +，消费/退费/清零 −） */
  money: number;
  balanceAfter: number;
  /** 业务时间（契约 C1：`createAt` 是第三种写法，正确名为 `createTime` ← legacy `create_time`） */
  createTime: string;
  remark: string;
  requestId?: string;
}

const LOG_TYPE_REMARK: Record<number, string> = {
  100: '充值',
  101: '课程消费（校区）',
  201: '课程消费（校区）',
  104: '课程消费（学校）',
  204: '课程消费（学校）',
  207: '余额退费',
  208: '余额清零',
  106: '转结出',
  206: '转结入',
};
const SEED_TYPES = [100, 101, 101, 201, 104, 207, 208] as const;
const PER_USER_LOGS = 320; // > 200，覆盖分页边界

let logSeq = 90000;
const logs: ExpenseLog[] = [];

(function seedLogs() {
  for (const u of users) {
    if (u.personType !== 'student') continue; // 仅学生造大量流水
    let running = getAccount(u.userId, u.campusId).total;
    for (let i = 0; i < PER_USER_LOGS; i++) {
      const type = pick(SEED_TYPES);
      // 金额 20~3000 元；充值/转结入 为正，其余为负
      const yuan = randInt(20, 3000);
      // 仅 100（充值）为正；其余消费/退费/清零为负（106/206 转结不入 SEED_TYPES，故不判）
      const positive = type === 100;
      const money = positive ? yuan * 100 : -yuan * 100;
      running = Math.max(running + money, -200000);
      const createTime = rfc3339(BASE_MS - i * 3600_000 * randInt(1, 30));
      logs.push({
        id: ++logSeq,
        userId: u.userId,
        institutionId: 1,
        campusId: u.campusId,
        type,
        money,
        balanceAfter: running,
        createTime,
        remark: LOG_TYPE_REMARK[type] ?? '流水',
      });
    }
  }
})();

/** 按筛选条件取**完整**流水集（倒序；分页由 envelope.page 负责）。 */
export interface LogFilter {
  userId?: string;
  type?: number;
  from?: string;
  to?: string;
  institutionId?: number;
  campusId?: number;
}
export function queryLogs(f: LogFilter): ExpenseLog[] {
  const from = f.from ? Date.parse(`${f.from}T00:00:00+08:00`) : null;
  const to = f.to ? Date.parse(`${f.to}T23:59:59.999+08:00`) : null;
  return logs
    .filter((l) => {
      if (f.userId && l.userId !== f.userId) return false;
      if (f.type !== undefined && l.type !== f.type) return false;
      if (f.institutionId && f.institutionId !== 1) return false;
      if (f.campusId && f.campusId !== 0 && l.campusId !== f.campusId) return false;
      const t = Date.parse(l.createTime);
      if (from !== null && t < from) return false;
      if (to !== null && t > to) return false;
      return true;
    })
    .sort((a, b) => (a.createTime < b.createTime ? 1 : a.createTime > b.createTime ? -1 : b.id - a.id));
}

/** 追加一条流水（写端点共用；返回新 logId）。 */
export function appendLog(userId: string, campusId: number, type: number, money: number, remark: string, requestId?: string): ExpenseLog {
  const a = ensureAccount(userId, campusId, 0, 0);
  a.campusBalance += money;
  a.totalBalance += money;
  const log: ExpenseLog = {
    id: ++logSeq,
    userId,
    institutionId: 1,
    campusId,
    type,
    money,
    balanceAfter: a.totalBalance,
    createTime: rfc3339(BASE_MS),
    remark,
  };
  if (requestId) log.requestId = requestId;
  logs.unshift(log); // 新流水置顶（倒序查询天然靠前）
  return log;
}

/* ================= 资金工单（t_user_balance_request） ================= */
export interface BalanceRequest {
  id: number;
  bizNo: string;
  type: number; // 100/101/202/203/300
  userId: string;
  institutionId: number;
  campusId: number;
  /** 仅 type=300（转结）有值，其余 0 */
  toInstitutionId: number;
  toCampusId: number;
  money: number; // 分
  approved: 0 | 1 | -1 | -2; // 0 待审 / 1 通过 / -1 驳回 / -2 撤销
  applicantId: string;
  approverId: string | null;
  remark: string;
  /** 审批意见（驳回必填；端点 15 responseMsg） */
  responseMsg: string;
  /** 申请时间（业务时间 ← request_time；v1.6 B2：`createdAt` 是迁移时生成的新列，不下发） */
  requestTime: string;
  /** 审批时间（业务时间 ← response_time；未审批为 null） */
  responseTime: string | null;
}
const requestTypes = [100, 101, 202, 203, 300] as const;
let reqSeq = 5000;
const requests: BalanceRequest[] = [];
(function seedRequests() {
  for (let i = 0; i < 60; i++) {
    const u = pick(users.filter((x) => x.personType === 'student'));
    const approved = pick([0, 0, 1, -1, -2] as const);
    const type = pick(requestTypes);
    const requestTime = rfc3339(BASE_MS - i * 7200_000);
    // type=300（转结）有目标校区，其余无
    const isTransfer = type === 300;
    requests.push({
      id: ++reqSeq,
      bizNo: `REQ${(700000 + i).toString()}`,
      type,
      userId: u.userId,
      institutionId: 1,
      campusId: u.campusId,
      toInstitutionId: isTransfer ? 1 : 0,
      toCampusId: isTransfer ? pick(campuses.filter((c) => c.campusId !== u.campusId)).campusId : 0,
      money: randInt(300, 5000) * 100,
      approved,
      applicantId: u.userId,
      approverId: approved === 0 ? null : ulid(302),
      remark: '工单',
      responseMsg: approved === -1 ? '材料不齐，请补充凭证后重新提交' : '',
      requestTime,
      responseTime: approved === 0 ? null : rfc3339(Date.parse(requestTime) + 3600_000),
    });
  }
  requests.sort((a, b) => (a.requestTime < b.requestTime ? 1 : -1));
})();
export function queryRequests(f: { type?: number; approved?: number; userId?: string; institutionId?: number; campusId?: number }): BalanceRequest[] {
  return requests.filter((r) => {
    if (f.type !== undefined && r.type !== f.type) return false;
    if (f.approved !== undefined && r.approved !== f.approved) return false;
    if (f.userId && r.userId !== f.userId) return false;
    if (f.institutionId && f.institutionId !== 1) return false;
    if (f.campusId && f.campusId !== 0 && r.campusId !== f.campusId) return false;
    return true;
  });
}
export function findRequest(id: number): BalanceRequest | undefined {
  return requests.find((r) => r.id === id);
}
export function createRequest(
  type: number,
  userId: string,
  campusId: number,
  money: number,
  remark: string,
  applicantId: string,
  toInstitutionId = 0,
  toCampusId = 0,
): BalanceRequest {
  const r: BalanceRequest = {
    id: ++reqSeq,
    bizNo: `REQ${(700000 + reqSeq).toString()}`,
    type,
    userId,
    institutionId: 1,
    campusId,
    toInstitutionId,
    toCampusId,
    money,
    approved: 0,
    applicantId,
    approverId: null,
    remark,
    responseMsg: '',
    requestTime: rfc3339(BASE_MS),
    responseTime: null,
  };
  requests.unshift(r);
  return r;
}

/* ================= 活动（t_courses_activity） ================= */
export interface ActivitySign {
  id: number;
  activityId: number;
  userId: string;
  status: number; // 0 取消 / 1 报名 / 2 参加 / 3 报课 / 4 过期（Go models_activity.go:31 ActivitySignedCancelled=0）
  recommendUserId: string | null;
  money: number; // 分
  /** 报名业务时间（契约 C1：`createAt`→`createTime`；端点 24/28 signeds 行） */
  createTime: string;
}
export interface Activity {
  id: number;
  institutionId: number;
  campusId: number;
  type: 2 | 3 | 4; // 2 充值赠送 / 3 代金券 / 4 老带新（Go models_activity.go:16-20 ActivityTypeRecharge/Voucher/Recommend）
  name: string;
  status: 0 | 1; // 0 停用 / 1 启用（注意：status=0 仍允许报名，契约 §2.2）
  numberSign: number;
  total: number;
  signed: number;
  /** 活动金额（分；v1.6 E6：活动级 `money`，充值赠送额度/老带新奖励额/特殊费用额，区别于 signed 行 money） */
  money: number;
  signable: boolean;
  /** 开始时间（契约 C2：源列 start_time，活动与排班统一 startTime，撤回 startAt 方案） */
  startTime: string;
  /** 结束时间（契约 C2：源列 end_time，统一 endTime） */
  endTime: string;
  signeds: ActivitySign[];
}
let signSeq = 3000;
function mkSign(activityId: number, userId: string, status: number, recommendUserId: string | null, money: number): ActivitySign {
  return { id: ++signSeq, activityId, userId, status, recommendUserId, money, createTime: rfc3339(BASE_MS - randInt(1, 30) * 86400_000) };
}
const activities: Activity[] = [
  {
    // type=4 老带新（Go ActivityTypeRecommend）；status 覆盖 0取消/1报名/2参加/3报课
    id: 1, institutionId: 1, campusId: 11, type: 4, name: '老带新推荐（数学）', status: 1, numberSign: 5,
    total: 100, signed: 4, money: 20000, signable: true, startTime: rfc3339(BASE_MS - 40 * 86400_000), endTime: rfc3339(BASE_MS + 20 * 86400_000),
    signeds: [
      mkSign(1, ulid(201), 1, null, 20000),
      mkSign(1, ulid(202), 1, ulid(201), 20000),
      mkSign(1, ulid(204), 0, ulid(201), 20000),
      mkSign(1, ulid(203), 2, null, 20000),
      mkSign(1, ulid(205), 3, null, 20000),
    ],
  },
  {
    // type=2 充值赠送（Go ActivityTypeRecharge）；status 覆盖 1报名/4过期/0取消
    id: 2, institutionId: 1, campusId: 12, type: 2, name: '充值赠送 10%', status: 1, numberSign: 3,
    total: 200, signed: 2, money: 10000, signable: true, startTime: rfc3339(BASE_MS - 20 * 86400_000), endTime: rfc3339(BASE_MS + 40 * 86400_000),
    signeds: [mkSign(2, ulid(203), 1, null, 10000), mkSign(2, ulid(205), 4, null, 15000), mkSign(2, ulid(204), 0, null, 8000)],
  },
  {
    // type=3 代金券（Go ActivityTypeVoucher）；活动 status=0 停用（仍允许报名，契约 §2.2）
    id: 3, institutionId: 1, campusId: 11, type: 3, name: '代金券减免', status: 0, numberSign: 1,
    total: 50, signed: 1, money: 5000, signable: false, startTime: rfc3339(BASE_MS - 60 * 86400_000), endTime: rfc3339(BASE_MS - 5 * 86400_000),
    signeds: [mkSign(3, ulid(202), 1, null, 5000)],
  },
  {
    // type=2 充值赠送；暂无报名
    id: 4, institutionId: 1, campusId: 13, type: 2, name: '新学期充值有礼', status: 1, numberSign: 0,
    total: 150, signed: 0, money: 15000, signable: true, startTime: rfc3339(BASE_MS - 5 * 86400_000), endTime: rfc3339(BASE_MS + 35 * 86400_000),
    signeds: [],
  },
  {
    // type=4 老带新；2 条有效报名
    id: 5, institutionId: 1, campusId: 12, type: 4, name: '老带新推荐（物理）', status: 1, numberSign: 2,
    total: 80, signed: 2, money: 30000, signable: true, startTime: rfc3339(BASE_MS - 15 * 86400_000), endTime: rfc3339(BASE_MS + 25 * 86400_000),
    signeds: [mkSign(5, ulid(203), 1, null, 30000), mkSign(5, ulid(205), 1, ulid(203), 30000)],
  },
];
export function queryActivities(f: { type?: number; status?: number; keyword?: string; institutionId?: number; campusId?: number }): Activity[] {
  return activities.filter((a) => {
    if (f.type !== undefined && a.type !== f.type) return false;
    if (f.status !== undefined && a.status !== f.status) return false;
    if (f.institutionId && f.institutionId !== 1) return false;
    if (f.campusId && f.campusId !== 0 && a.campusId !== f.campusId) return false;
    if (f.keyword && !a.name.includes(f.keyword)) return false;
    return true;
  });
}
export function findActivity(id: number): Activity | undefined {
  return activities.find((a) => a.id === id);
}

/* ================= 课程 / 排班 / 打卡 ================= */
export interface CourseRecord {
  id: number;
  courseId: number;
  teacherId: string;
  campusId: number;
  /** 地址（v1.8：源列 `address`；**无 room 列**——地址≠教室号，不得顶替） */
  address: string;
  /** 周（排班规则源列 week VARCHAR(50) DEFAULT '-1'；"-1"=全部周 / "0".."6" / "1,3,5" 多值） */
  week: string;
  startTime: string; // RFC3339
  endTime: string;
  status: 0 | 1 | 2; // 0 未开始 / 1 进行中 / 2 已结束
  /** 逐学生（C3：`attendance/payCost`→`type/pay/cost/giveCost`） */
  students: { userId: string; type: number; pay: number; cost: number; giveCost: number }[];
}
export interface Course {
  id: number;
  institutionId: number;
  name: string;
  classify: string;
  status: 0 | 1;
  teacherIds: string[];
  records: CourseRecord[];
}
let recordSeq = 6000;
function mkRecord(courseId: number, teacherId: string, campusId: number, address: string, week: string, offsetDays: number, status: 0 | 1 | 2): CourseRecord {
  const start = BASE_MS + offsetDays * 86400_000;
  const present = (on: boolean): number => (status === 2 && on ? 1 : 0); // 已结束课才有出勤 type=1（正常）
  return {
    id: ++recordSeq,
    courseId,
    teacherId,
    campusId,
    address,
    week,
    startTime: rfc3339(start),
    endTime: rfc3339(start + 90 * 60_000),
    status,
    students: [
      { userId: ulid(201), type: present(true), pay: 10000, cost: 10000, giveCost: 0 },
      { userId: ulid(202), type: present(true), pay: 10000, cost: 10000, giveCost: 0 },
      { userId: ulid(204), type: present(false), pay: 10000, cost: 10000, giveCost: 0 },
    ],
  };
}
const courses: Course[] = [
  {
    id: 1, institutionId: 1, name: '数学 8 班', classify: '数学', status: 1, teacherIds: [ulid(101)],
    records: [
      mkRecord(1, ulid(101), 11, '滨江校区 3 楼 305 教室', '1,3,5', -3, 2),
      mkRecord(1, ulid(101), 11, '滨江校区 3 楼 305 教室', '1,3,5', 0, 0),
      mkRecord(1, ulid(101), 11, '滨江校区 5 楼 502 教室', '2,4', 2, 0),
      mkRecord(1, ulid(101), 11, '滨江校区 3 楼 305 教室', '-1', 4, 0),
    ],
  },
  {
    id: 2, institutionId: 1, name: '物理 3 班', classify: '物理', status: 1, teacherIds: [ulid(102)],
    records: [mkRecord(2, ulid(102), 12, '城西校区 1 楼 102 教室', '3', -1, 1), mkRecord(2, ulid(102), 12, '城西校区 1 楼 102 教室', '3', 1, 0)],
  },
  {
    id: 3, institutionId: 1, name: '英语 1 班', classify: '英语', status: 0, teacherIds: [ulid(101)],
    records: [mkRecord(3, ulid(101), 11, '滨江校区 4 楼 401 教室', '6', -7, 2)],
  },
];
export function queryCourses(f: { classify?: string; status?: number; keyword?: string; institutionId?: number; campusId?: number }): Course[] {
  return courses.filter((c) => {
    if (f.classify && c.classify !== f.classify) return false;
    if (f.status !== undefined && c.status !== f.status) return false;
    if (f.institutionId && f.institutionId !== 1) return false;
    if (f.keyword && !c.name.includes(f.keyword)) return false;
    if (f.campusId && f.campusId !== 0 && !c.records.some((r) => r.campusId === f.campusId)) return false;
    return true;
  });
}
export function findCourse(id: number): Course | undefined {
  return courses.find((c) => c.id === id);
}
export function findRecord(courseId: number, recordId: number): CourseRecord | undefined {
  return findCourse(courseId)?.records.find((r) => r.id === recordId);
}

/* ================= 分账（Nested Set 树） ================= */
export interface DivideNode {
  userId: string;
  realName: string;
  parentUserId: string | null;
  /** 层级（根=1；Go MaxDivideDepth=100，业务约束 3 层） */
  layer: number;
  /** 每次分成金额（元；A2：`quota` 是金额非 0~1 比率，源列 DECIMAL(12,2)，与 total_income 同族；0.00 = 该链不分成） */
  quota: number;
  cumulativeIncome: number; // 分
  children: DivideNode[];
}
const divideTree: DivideNode[] = [
  {
    userId: ulid(303), realName: '超级管理员', parentUserId: null, layer: 1, quota: 500, cumulativeIncome: 0,
    children: [
      {
        userId: ulid(101), realName: '张婷', parentUserId: ulid(303), layer: 2, quota: 150, cumulativeIncome: 1200000,
        children: [
          { userId: ulid(201), realName: '王梓涵', parentUserId: ulid(101), layer: 3, quota: 50, cumulativeIncome: 300000, children: [] },
          { userId: ulid(202), realName: '陈一诺', parentUserId: ulid(101), layer: 3, quota: 0, cumulativeIncome: 0, children: [] }, // quota=0（新节点默认）
        ],
      },
      {
        userId: ulid(102), realName: '李强', parentUserId: ulid(303), layer: 2, quota: 100, cumulativeIncome: 800000,
        children: [{ userId: ulid(203), realName: '李沐宸', parentUserId: ulid(102), layer: 3, quota: 30, cumulativeIncome: 200000, children: [] }],
      },
    ],
  },
];
export function getDivideTree(): DivideNode[] {
  return divideTree;
}
export function findDivideNode(userId: string): DivideNode | undefined {
  let found: DivideNode | undefined;
  const walk = (nodes: DivideNode[]): void => {
    for (const n of nodes) {
      if (n.userId === userId) found = n;
      walk(n.children);
    }
  };
  walk(divideTree);
  return found;
}

/* ================= 课酬方案（v1.9 两级结构：方案 + 明细） ================= */
/** 课酬明细行（t_course_payment_detail；金额存分，教龄/比例为 number，percentage 为百分比数 0~100）。 */
export interface PayrollDetail {
  detailId: number;
  /** 老师（可空；null = 机构级通用档） */
  teacherId: string | null;
  classifyId: number;
  classType: number;
  gradeId: number;
  subjectId: number;
  teacherCert: number;
  /** 教龄区间（年，3 位小数；源列两列，不得合并为单值） */
  teacherExpMin: number;
  teacherExpMax: number;
  /** 课酬比例（百分比数 0~100，1 位小数；A3：非 0~1 小数） */
  percentage: number;
  /** 金额上下限 / 奖励（分） */
  min: number;
  max: number;
  reward: number;
  /** 计算方式名（明细级 name；方案级为 schemeName） */
  displayName: string | null;
  /** 明细级启停（方案级为 actived） */
  detailActived: 0 | 1;
}
/** 课酬方案（t_course_payment；两级结构顶层）。 */
export interface PayrollPlan {
  id: number;
  institutionId: number;
  campusId: number; // 0 = 机构级方案
  schemeName: string;
  effectDate: string;
  /** 方案级启停（整案停用 = 不参与匹配） */
  actived: 0 | 1;
  details: PayrollDetail[];
}
let detailSeq = 90000;
const payrollPlans: PayrollPlan[] = [
  {
    id: 1, institutionId: 1, campusId: 11, schemeName: '滨江校区 2026 秋季课酬方案', effectDate: '2026-09-01', actived: 1,
    details: [
      { detailId: ++detailSeq, teacherId: ulid(101), classifyId: 1, classType: 1, gradeId: 1, subjectId: 1, teacherCert: 1, teacherExpMin: 5, teacherExpMax: 15, percentage: 85, min: 90000, max: 150000, reward: 10000, displayName: '数学 5~15 年教龄', detailActived: 1 },
      { detailId: ++detailSeq, teacherId: null, classifyId: 1, classType: 1, gradeId: -1, subjectId: -1, teacherCert: 0, teacherExpMin: 0, teacherExpMax: 5, percentage: 70, min: 60000, max: 90000, reward: 0, displayName: '数学 5 年内教龄（通用）', detailActived: 1 },
    ],
  },
  {
    id: 2, institutionId: 1, campusId: 12, schemeName: '城西校区 2026 秋季课酬方案', effectDate: '2026-09-01', actived: 1,
    details: [
      { detailId: ++detailSeq, teacherId: ulid(102), classifyId: 2, classType: 1, gradeId: 2, subjectId: 2, teacherCert: 0, teacherExpMin: 3, teacherExpMax: 10, percentage: 80, min: 80000, max: 120000, reward: 8000, displayName: '物理 3~10 年教龄', detailActived: 1 },
      { detailId: ++detailSeq, teacherId: null, classifyId: 2, classType: 1, gradeId: -1, subjectId: -1, teacherCert: 0, teacherExpMin: 0, teacherExpMax: 3, percentage: 60, min: 50000, max: 80000, reward: 0, displayName: '物理 3 年内教龄（通用）', detailActived: 0 },
    ],
  },
];
export function queryPayrollPlans(f: { actived?: number; classifyId?: number }): PayrollPlan[] {
  return payrollPlans.filter((p) => {
    if (f.actived !== undefined && p.actived !== f.actived) return false;
    if (f.classifyId !== undefined && !p.details.some((d) => d.classifyId === f.classifyId)) return false;
    return true;
  });
}
export function findPayrollPlan(id: number): PayrollPlan | undefined {
  return payrollPlans.find((p) => p.id === id);
}

/* ================= 收支类型字典（v1.9：type 1=支出/2=收入，删 direction；补 id/parentId） ================= */
export interface ExpenditureType {
  id: number;
  /** 收支方向编码：1=支出 / 2=收入（与流水 type 同事实，两表均无 direction 列） */
  type: number;
  name: string;
  /** 上级类型 id（0 = 顶级） */
  parentId: number;
}
export const expenditureTypes: ExpenditureType[] = [
  { id: 1, type: 1, name: '课程消费', parentId: 0 },
  { id: 2, type: 1, name: '课程消费（校区）', parentId: 1 },
  { id: 3, type: 1, name: '课程消费（学校）', parentId: 1 },
  { id: 4, type: 2, name: '线下收入', parentId: 0 },
  { id: 5, type: 2, name: '线上收入', parentId: 0 },
];
export function expenditureTypeOf(id: number): ExpenditureType | undefined {
  return expenditureTypes.find((t) => t.id === id);
}

/* ================= 幂等存储（写端点重复提交 → repeated=true） ================= */
const idempotent = new Map<string, Record<string, unknown>>();
export function idempotentKey(method: string, requestId: string): string {
  return `${method}:${requestId}`;
}
export function takeIdempotent(key: string): Record<string, unknown> | undefined {
  return idempotent.get(key);
}
export function setIdempotent(key: string, result: Record<string, unknown>): void {
  idempotent.set(key, result);
}

/* ================= 金额/字段便捷校验（端点侧参数校验） ================= */
export { fmt, toCents };