group_fqcd_jr/app/static/portal/common/api-client.js

import { clearAuthSession, getAccessToken } from '/static/portal/common/auth.js?v=20260913';

const ENDPOINTS = Object.freeze({
  // 健康检查没有 `data` 信封（是裸的 `{"status": ...}`），所以必须 `raw: true` ——
  // 否则调用方拿到 `payload.data`（undefined），会把"后端在线"判成"离线"。
  //
  // ⚠️ 路径必须是后端**真实存在**的路由。此前这里写的是 `/health`，而 `app/main.py`
  // 只挂了 `/internal/health/live` 与 `/internal/health/ready`（无 `/health`）——
  // 于是投顾工作台的探测恒返回 404，被 `.catch()` 判成"后端未连接 · 本地引擎"，
  // 即使后端完全正常也照显不误。
  //
  // 选 `live` 而不是 `ready`：前端这一句的语义是"**后端进程是否在线**"。
  // `ready` 会额外探测 MySQL/Redis/Milvus，任一不可用即 503 —— 用它会变成
  // "依赖抖动 => 前端宣称后端离线"，与这句判断的原意不符。
  HEALTH: { method: 'GET', path: '/internal/health/live', auth: false, raw: true },
  A034: { method: 'POST', path: '/api/v1/auth/tokens', auth: false },
  V001: { method: 'POST', path: '/api/v1/visitor-tokens', auth: false, raw: true },
  P001: { method: 'GET', path: '/api/v1/products' },
  P002: { method: 'GET', path: '/api/v1/products/{productCode}/nav-history' },
  C001: { method: 'POST', path: '/api/v1/conversations', idempotent: true },
  C002: { method: 'GET', path: '/api/v1/conversations/{sessionId}' },
  C003: { method: 'GET', path: '/api/v1/conversations/{sessionId}/messages' },
  C005: { method: 'POST', path: '/api/v1/conversations/{sessionId}/handover-requests', idempotent: true },
  A035: { method: 'GET', path: '/api/v1/admin/roles' },
  A036: { method: 'GET', path: '/api/v1/admin/roles/{roleCode}' },
  A037: { method: 'GET', path: '/api/v1/admin/roles/{roleCode}/permissions' },
  A038: { method: 'GET', path: '/api/v1/admin/users/{userId}/roles' },
  A039: { method: 'GET', path: '/api/v1/admin/customer-profile-candidates' },
  A040: { method: 'POST', path: '/api/v1/admin/customer-profile-candidates/{candidateId}/reviews' },
  A001: { method: 'POST', path: '/api/v1/admin/config-releases', idempotent: true },
  A041: { method: 'GET', path: '/api/v1/admin/advisor/profile-drift-reviews' },
  A042: { method: 'POST', path: '/api/v1/admin/advisor/profile-drift-reviews/{reviewId}/reviews', idempotent: true },
  A002: { method: 'GET', path: '/api/v1/admin/config-releases' },
  A008: { method: 'POST', path: '/api/v1/admin/config-releases/{releaseId}/platform-config-items', idempotent: true },
  A009: { method: 'GET', path: '/api/v1/admin/config-releases/{releaseId}/platform-config-items' },
  A010: { method: 'PUT', path: '/api/v1/admin/config-releases/{releaseId}/platform-config-items/{itemId}', idempotent: true },
  // 详情端点：**更新必须先拿到这一行的 etag**（PUT 要求 If-Match），
  // 而列表的 meta 里没有它 —— 见 `docs/05` §19 的 A048/A049 说明。
  A048: { method: 'GET', path: '/api/v1/admin/config-releases/{releaseId}/platform-config-items/{itemId}' },
  A018: { method: 'POST', path: '/api/v1/admin/config-releases/{releaseId}/model-routing-rules', idempotent: true },
  A019: { method: 'GET', path: '/api/v1/admin/config-releases/{releaseId}/model-routing-rules' },
  A020: { method: 'PUT', path: '/api/v1/admin/config-releases/{releaseId}/model-routing-rules/{ruleId}', idempotent: true },
  A049: { method: 'GET', path: '/api/v1/admin/config-releases/{releaseId}/model-routing-rules/{ruleId}' },
  A003: { method: 'GET', path: '/api/v1/admin/config-releases/{releaseId}' },
  A004: { method: 'POST', path: '/api/v1/admin/config-releases/{releaseId}/validations', idempotent: true },
  A005: { method: 'POST', path: '/api/v1/admin/config-releases/{releaseId}/reviews', idempotent: true },
  A006: { method: 'POST', path: '/api/v1/admin/config-releases/{releaseId}/activations', idempotent: true },
  A012: { method: 'GET', path: '/api/v1/admin/model-endpoints' },
  A033: { method: 'GET', path: '/api/v1/admin/audit-records' },
  ADMIN_HANDOVERS: { method: 'GET', path: '/api/v1/admin/customer-service/handover-tickets' },
  ADMIN_HANDOVER_DETAIL: { method: 'GET', path: '/api/v1/admin/customer-service/handover-tickets/{ticketNo}' },
  ADMIN_ADVISOR_PENDING: { method: 'GET', path: '/api/v1/admin/advisor/pending-contents' },
  ADMIN_ADVISOR_REVIEW: { method: 'POST', path: '/api/v1/admin/advisor/recommendations/{contentId}/reviews', idempotent: true },
  ADMIN_ADVISOR_PUBLISH: { method: 'POST', path: '/api/v1/admin/advisor/recommendations/{contentId}/publications', idempotent: true },
  ONB001: { method: 'GET', path: '/api/v1/onboarding/risk-questionnaire' },
  ONB002: { method: 'POST', path: '/api/v1/onboarding/risk-questionnaire/submissions', idempotent: true },
  R001: { method: 'POST', path: '/api/v1/agent-runs' },
  R002: { method: 'GET', path: '/api/v1/agent-runs/{runId}' },
  R003: { method: 'GET', path: '/api/v1/agent-runs/{runId}/events', stream: true },
  RK001: { method: 'GET', path: '/api/v1/risk/overview' },
  RK002: { method: 'GET', path: '/api/v1/risk/alerts' },
  RK003: { method: 'GET', path: '/api/v1/risk/alerts/{alertNo}' },
  RK004: { method: 'GET', path: '/api/v1/risk/evidence/{source}' },
  RK005: { method: 'GET', path: '/api/v1/risk/notifications' },
  RK006: { method: 'POST', path: '/api/v1/risk/alerts/scan', idempotent: true, timeout: 60000 },
  RK007: { method: 'POST', path: '/api/v1/risk/alerts/{alertNo}/acknowledgements', idempotent: true },
  RK008: { method: 'POST', path: '/api/v1/risk/alerts/{alertNo}/investigations', idempotent: true },
  RK009: { method: 'POST', path: '/api/v1/risk/alerts/{alertNo}/exclusions', idempotent: true },
  RK010: { method: 'POST', path: '/api/v1/risk/alerts/{alertNo}/resolutions', idempotent: true },
  RK011: { method: 'POST', path: '/api/v1/risk/alerts/{alertNo}/escalations', idempotent: true },
  RK012: { method: 'POST', path: '/api/v1/risk/alerts/{alertNo}/evidence', formData: true },
  // ⚠️ 保留：同上，前端契约测试要求这张表里有它。风控日报现在走 `RK014`（SSE 流式），
  // 非流式这条当前无人调用。另注：RK013–RK015 目前**尚未登记进 `docs/05` §19**
  // （与投顾 AD 段原先的情况相同），属于文档缺口。
  RK013: { method: 'POST', path: '/api/v1/risk/daily-report' },
  RK014: { method: 'POST', path: '/api/v1/risk/daily-report/stream', stream: true },
  RK015: { method: 'POST', path: '/api/v1/risk/daily-report/mail' },
  T001: { method: 'GET', path: '/api/v1/users/me/account/dashboard' },
  T002: { method: 'POST', path: '/api/v1/users/me/orders', idempotent: true },
  T003: { method: 'GET', path: '/api/v1/users/me/orders' },
  T004: { method: 'GET', path: '/api/v1/users/me/orders/{orderNo}' },
  T005: { method: 'POST', path: '/api/v1/users/me/orders/{orderNo}/cancellations', idempotent: true },
  T006: { method: 'GET', path: '/api/v1/users/me/holdings' },
  T007: { method: 'GET', path: '/api/v1/users/me/transactions' },
  T008: { method: 'GET', path: '/api/v1/users/me/transactions/{transactionNo}' },
  T009: { method: 'GET', path: '/api/v1/users/me/cash-ledger' },
  ADVISOR_PUBLISHED: { method: 'GET', path: '/api/v1/advisor/recommendations/published' },
  // 投顾自助审核/发布自己生成的推荐方案（2026-09-14 起）：
  // 服务层不再额外要求 admin 角色，但仍要求 `product-recommendation:review` /
  // `product-recommendation:publish` 两个权限码（仅 advisor 与 admin 持有）。
  ADVISOR_REVIEW_RECOMMENDATION: { method: 'POST', path: '/api/v1/advisor/recommendations/{contentId}/reviews', idempotent: true },
  ADVISOR_PUBLISH_RECOMMENDATION: { method: 'POST', path: '/api/v1/advisor/recommendations/{contentId}/publications', idempotent: true },
  // ⚠️ 保留：前端契约测试（`tests/unit/api/test_portal_frontend.py`）把"页面会用到的端点"
  // 固定成一张清单，**删注册会破坏它**。它对应 AD002，当前页面确实没调用
  // （投顾本人没有"自己的投资目标"，调它返回 404）—— 但**注册与调用是两件事**。
  ADVISOR_GOAL: { method: 'GET', path: '/api/v1/advisor/investment-goals/current' },
  // ⚠️ 这三个 POST 的响应形状**取决于业务是否走完全程**，不只是"带不带 key"：
  //   · 业务前置校验未通过（`profile_required` / `investment_goal_required` /
  //     `recommendation_input_invalid`）→ **裸文档** `{status:"…"}`。
  //     ⚠️ 这三个 early return 位于 `generate()` 的**最前面**，**在 key 判断之前**，
  //     所以**带不带 key 都是裸文档** —— 这一点曾判断错。
  //   · 不带 key 且走完全程 → 裸业务文档（顶层键是 `status` / `allocation` / `summary`…）。
  //   · 带 key 且走完全程 → **`{data, meta}` 信封**，`data` 是 `{content_id, status, plan:{…}}`。
  //
  // 既然**同一个端点会返回两种形状**，前端就必须两种都能吃。这里三个 POST **一律标 `raw`**，
  // 让 `request()` 原样交出完整响应体，再由 `actions-module` 的 `response.data ?? response`
  // 与 `normalizeRecommend()` 统一归一：
  //     raw + 信封   → `response.data` 命中 → 取到业务数据
  //     raw + 裸文档 → `response.data` 是 undefined → 由 `??` 兜底取整个响应体
  // 反过来（不标 raw）时，裸文档会被 `payload.data` 解成 `undefined`，
  // 调用方只剩包装对象，页面就显示「后端返回状态：undefined」。
  //
  // 2026-09-14 曾把 `raw` 从 RECOMMEND 上去掉，理由是"它必带 key ⇒ 必然是信封"——
  // 该前提不成立（见上面的 early return），结果前置校验一失败页面就显示 undefined。
  ADVISOR_ANALYSIS: { method: 'POST', path: '/api/v1/advisor/portfolio-analysis', raw: true },
  ADVISOR_ALLOCATION: { method: 'POST', path: '/api/v1/advisor/asset-allocation', raw: true },
  ADVISOR_RECOMMEND: { method: 'POST', path: '/api/v1/advisor/recommendations', idempotent: true, raw: true },
  ADVISOR_CREATE_GOAL: { method: 'POST', path: '/api/v1/advisor/investment-goals', idempotent: true },
  ADVISOR_CUSTOMER_GOAL: { method: 'GET', path: '/api/v1/advisor/customers/{customerId}/investment-goals/current' },
  ADVISOR_CONFIRM_GOAL: { method: 'POST', path: '/api/v1/advisor/investment-goals/{goalNo}/confirmations', idempotent: true },
  ADVISOR_GOAL_BOOK: { method: 'GET', path: '/api/v1/advisor/investment-goals/{goalNo}/goal-book' },
  ADVISOR_REVIEW_BOOK: { method: 'POST', path: '/api/v1/advisor/investment-goals/{goalNo}/goal-book/reviews', idempotent: true },
  ADVISOR_PUBLISH_BOOK: { method: 'POST', path: '/api/v1/advisor/investment-goals/{goalNo}/goal-book/publications', idempotent: true },
  // ⚠️ K002 / K003 必须标 `raw: true`：它们的成功体是**裸的**（没有 `data` 信封）——
  // K002 直接返回 `{knowledge_ids, filename, chunk_count}`，K003 返回 `{items, count}`。
  // 不标的话 `request()` 会去取 `payload.data`（undefined），调用方拿到空值：
  // 上传显示"已入库 0 块"、列表显示"知识库为空"，而库里其实有数据。
  // 与 `V001`（访客令牌）同一个道理。
  K002: { method: 'POST', path: '/api/v1/knowledge/upload', raw: true },
  K003: { method: 'GET', path: '/api/v1/knowledge/list', raw: true },
  K004: { method: 'DELETE', path: '/api/v1/knowledge/{knowledgeId}', idempotent: true },
  OFFSITE_MAILS: { method: 'GET', path: '/api/v1/offsite-fund/mails' },
  OFFSITE_MAIL: { method: 'GET', path: '/api/v1/offsite-fund/mails/{mailId}' },
  OFFSITE_MAIL_DELETE: { method: 'POST', path: '/api/v1/offsite-fund/mails/{mailId}/deletions', idempotent: true },
  OFFSITE_RECOGNITION: { method: 'GET', path: '/api/v1/offsite-fund/mails/{mailId}/recognition-fields' },
  OFFSITE_RECOGNITION_SAVE: { method: 'PUT', path: '/api/v1/offsite-fund/mails/{mailId}/recognition-fields', idempotent: true },
  OFFSITE_NL2SQL_FIELDS: { method: 'GET', path: '/api/v1/offsite-fund/documents/{taskId}/nl2sql-fields' },
  OFFSITE_NL2SQL_FIELDS_SAVE: { method: 'PUT', path: '/api/v1/offsite-fund/documents/{taskId}/nl2sql-fields', idempotent: true },
  OFFSITE_RULE_RESULTS: { method: 'GET', path: '/api/v1/offsite-fund/documents/{taskId}/rule-results' },
  OFFSITE_RULE_RECALCULATE: { method: 'POST', path: '/api/v1/offsite-fund/documents/{taskId}/rule-results/recalculations', idempotent: true },
  OFFSITE_MAILBOX: { method: 'GET', path: '/api/v1/offsite-fund/mailbox-status' },
  OFFSITE_MAILBOX_RECOVER: { method: 'POST', path: '/api/v1/offsite-fund/mailbox-status/recoveries', idempotent: true },
  OFFSITE_ATTACHMENT_FILE: { method: 'GET', path: '/api/v1/offsite-fund/attachments/{attachmentId}/file' },
  OFFSITE_CONFIRM: { method: 'POST', path: '/api/v1/offsite-fund/documents/{taskId}/confirmations', idempotent: true },
  OFFSITE_RECOGNITION_RETRY: { method: 'POST', path: '/api/v1/offsite-fund/documents/{taskId}/recognition-retries', idempotent: true },
  OFFSITE_NOTIFICATION_CREATE: { method: 'POST', path: '/api/v1/offsite-fund/documents/{taskId}/notifications', idempotent: true },
  OFFSITE_NOTIFICATION_SEND: { method: 'POST', path: '/api/v1/offsite-fund/notifications/{notificationId}/send', idempotent: true },
  OFFSITE_SETTLEMENT_RECALCULATE: { method: 'POST', path: '/api/v1/offsite-fund/settlement-statistics/recalculate', idempotent: true },
  OFFSITE_TRIGGER_NL2SQL: { method: 'POST', path: '/api/tasks/{taskId}/trigger-agent-nl2sql', idempotent: true },
  PROMOTION_CREATE: { method: 'POST', path: '/api/v1/fund-promotion-materials', idempotent: true },
  PROMOTION_TASK: { method: 'GET', path: '/api/v1/fund-promotion-materials/{taskNo}' },
  PROMOTION_INPUTS: { method: 'PUT', path: '/api/v1/fund-promotion-materials/{taskNo}/inputs', idempotent: true },
  PROMOTION_ATTACHMENT: { method: 'POST', path: '/api/v1/fund-promotion-materials/{taskNo}/attachments', formData: true, idempotent: true },
  // 阿里云背景图生成采用异步任务，前端等待时间必须覆盖后端的 90 秒上游超时。
  PROMOTION_GENERATE: { method: 'POST', path: '/api/v1/fund-promotion-materials/{taskNo}/generations', idempotent: true, timeout: 120000 },
  PROMOTION_CHECKS: { method: 'GET', path: '/api/v1/fund-promotion-materials/{taskNo}/compliance-checks' },
  PROMOTION_REVIEW: { method: 'POST', path: '/api/v1/fund-promotion-materials/{taskNo}/reviews', idempotent: true },
  PROMOTION_DELIVERY: { method: 'POST', path: '/api/v1/fund-promotion-materials/{taskNo}/deliveries', idempotent: true },
  AGENT_RUN_CREATE: { method: 'POST', path: '/api/v1/agent-runs', idempotent: true },
  AGENT_RUN: { method: 'GET', path: '/api/v1/agent-runs/{runId}' },
});

export class ApiError extends Error {
  constructor(message, options = {}) {
    super(message);
    this.name = 'ApiError';
    this.code = options.code || 'NETWORK_ERROR';
    this.status = options.status || 0;
    this.retryable = Boolean(options.retryable);
    this.fieldErrors = options.fieldErrors || [];
    this.traceId = options.traceId || '';
    this.payload = options.payload || null;
  }
}

function pathFor(endpoint, pathParams = {}) {
  return Object.entries(pathParams).reduce(
    (path, [key, value]) => path.replace(`{${key}}`, encodeURIComponent(String(value))),
    endpoint.path,
  );
}

function wait(milliseconds) {
  return new Promise((resolve) => window.setTimeout(resolve, milliseconds));
}

function shouldRetry(error, attempt) {
  if (attempt > 0) return false;
  return error.status >= 500 || error.status === 0 || error.retryable;
}

async function request(endpointId, options = {}) {
  const endpoint = ENDPOINTS[endpointId];
  if (!endpoint) throw new ApiError(`未注册端点 ${endpointId}`, { code: 'ENDPOINT_NOT_REGISTERED' });
  const traceId = crypto.randomUUID();
  document.documentElement.dataset.traceId = traceId;
  const query = new URLSearchParams();
  Object.entries(options.query || {}).forEach(([key, value]) => {
    if (value !== undefined && value !== null && value !== '') query.set(key, String(value));
  });
  const queryString = query.size ? `?${query.toString()}` : '';
  const headers = { Accept: 'application/json', 'X-Trace-ID': traceId, ...(options.headers || {}) };
  const token = getAccessToken();
  if (endpoint.auth !== false && token) headers.Authorization = `Bearer ${token}`;
  if (options.body !== undefined && !endpoint.formData) headers['Content-Type'] = 'application/json';
  if (endpoint.idempotent) {
    const key = options.idempotencyKey || crypto.randomUUID().replaceAll('-', '');
    // ⚠️ HTTP 头值只能由 ≤0xFF 的码点组成，而 `fetch` 对含中文/emoji 的头值会**直接抛
    // `TypeError`** —— 请求根本没发出去，却在本文件末尾被包装成"网络连接失败"，
    // 把"参数非法"伪装成"网络故障"：现象是两个附件都上传失败、服务端一条记录都没有。
    // 2026-09-14 就是这条链路（`promotion.js` 把中文文件名拼进了幂等键）害得排查绕了很久。
    // 这里提前校验，把它变成一条能直接定位的错误；键的规范与平台一致：16-128 位可打印 ASCII。
    if (!/^[\x20-\x7e]{16,128}$/.test(key)) {
      throw new ApiError(
        `幂等键必须是 16-128 位 ASCII 字符（端点 ${endpointId}）：${key}`,
        { code: 'IDEMPOTENCY_KEY_INVALID' },
      );
    }
    headers['Idempotency-Key'] = key;
  }

  for (let attempt = 0; attempt < 2; attempt += 1) {
    const controller = new AbortController();
    const abortListener = () => controller.abort();
    options.signal?.addEventListener('abort', abortListener, { once: true });
    const timeoutId = window.setTimeout(
      () => controller.abort(),
      options.timeout || endpoint.timeout || 8000,
    );
    try {
      const response = await fetch(`${pathFor(endpoint, options.pathParams)}${queryString}`, {
        method: endpoint.method,
        headers,
        body: options.body === undefined || endpoint.method === 'GET'
          ? undefined
          : (endpoint.formData ? options.body : JSON.stringify(options.body)),
        cache: 'no-store',
        signal: controller.signal,
      });
      const payload = await response.json().catch(() => ({}));
      if (response.status === 401 && endpoint.auth !== false) {
        clearAuthSession({ eventType: 'session-expired' });
        window.dispatchEvent(new CustomEvent('portal:auth-expired'));
      }
      const responseTraceId = payload.meta?.trace_id || response.headers.get('X-Trace-ID') || traceId;
      document.documentElement.dataset.traceId = responseTraceId;
      const hasBusinessError = Object.prototype.hasOwnProperty.call(payload, 'code') && payload.code !== 0;
      if (!response.ok || payload.error || hasBusinessError) {
        const detail = payload.error || {};
        const validationDetail = Array.isArray(payload.detail)
          ? payload.detail
              .map((item) => item?.msg || item?.message || '')
              .filter(Boolean)
              .join('；')
          : (typeof payload.detail === 'string' ? payload.detail : '');
        const message = detail.message
          || (hasBusinessError ? payload.message : '')
          || validationDetail
          || (response.status ? `请求失败（HTTP ${response.status}）` : '请求未完成');
        const businessStatus = hasBusinessError && Number(payload.code) >= 400
          ? Number(payload.code)
          : response.status;
        const error = new ApiError(message, {
          code: detail.code || (hasBusinessError ? `BUSINESS_${payload.code}` : undefined),
          status: businessStatus,
          retryable: detail.retryable,
          fieldErrors: detail.field_errors,
          traceId: responseTraceId,
          payload,
        });
        if (response.status === 429 && attempt === 0) await wait(5000);
        else if (shouldRetry(error, attempt)) await wait(2000);
        else throw error;
        continue;
      }
      return { data: endpoint.raw ? payload : payload.data, meta: payload.meta || {}, traceId: responseTraceId };
    } catch (caught) {
      const error = caught instanceof ApiError
        ? caught
        : new ApiError(caught?.name === 'AbortError' ? '请求超时，请检查网络后重试' : '网络连接失败', { traceId });
      if (!shouldRetry(error, attempt)) throw error;
      await wait(2000);
    } finally {
      window.clearTimeout(timeoutId);
      options.signal?.removeEventListener('abort', abortListener);
    }
  }
  throw new ApiError('网络不稳定，请稍后重试', { traceId });
}

async function stream(endpointId, body, options = {}) {
  const endpoint = ENDPOINTS[endpointId];
  if (!endpoint?.stream) throw new ApiError(`端点 ${endpointId} 不支持流式请求`, { code: 'ENDPOINT_NOT_STREAMABLE' });
  const traceId = crypto.randomUUID();
  const token = getAccessToken();
  const headers = {
    Accept: 'text/event-stream',
    'Content-Type': 'application/json',
    'X-Trace-ID': traceId,
    ...(options.headers || {}),
  };
  if (token) headers.Authorization = `Bearer ${token}`;
  const response = await fetch(pathFor(endpoint, options.pathParams), {
    method: endpoint.method,
    headers,
    body: endpoint.method === 'GET' ? undefined : JSON.stringify(body ?? {}),
    signal: options.signal,
  });
  if (!response.ok || !response.body) {
    const payload = await response.json().catch(() => ({}));
    if (response.status === 401 && endpoint.auth !== false) {
      clearAuthSession({ eventType: 'session-expired' });
      window.dispatchEvent(new CustomEvent('portal:auth-expired'));
    }
    const detail = payload.error || {};
    throw new ApiError(detail.message || '流式请求未完成', {
      code: detail.code,
      status: response.status,
      traceId: payload.meta?.trace_id || traceId,
    });
  }
  const reader = response.body.getReader();
  const decoder = new TextDecoder();
  let buffer = '';
  const dispatch = (block) => {
    if (!block.trim() || block.trimStart().startsWith(':')) return;
    let eventName = 'message';
    const dataLines = [];
    block.split(/\r?\n/).forEach((line) => {
      if (line.startsWith('event:')) eventName = line.slice(6).trim();
      if (line.startsWith('data:')) dataLines.push(line.slice(5).trim());
    });
    if (!dataLines.length) return;
    const raw = dataLines.join('\n');
    let data = raw;
    try { data = JSON.parse(raw); } catch { /* Plain-text SSE data is valid. */ }
    options.onEvent?.({ type: eventName, data });
  };
  while (true) {
    const { done, value } = await reader.read();
    buffer += decoder.decode(value || new Uint8Array(), { stream: !done });
    const blocks = buffer.split(/\r?\n\r?\n/);
    buffer = blocks.pop() || '';
    blocks.forEach(dispatch);
    if (done) break;
  }
  if (buffer.trim()) dispatch(buffer);
}

async function requestFile(endpointId, options = {}) {
  const endpoint = ENDPOINTS[endpointId];
  if (!endpoint) throw new ApiError(`未注册端点 ${endpointId}`, { code: 'ENDPOINT_NOT_REGISTERED' });
  const traceId = crypto.randomUUID();
  const headers = { Accept: '*/*', 'X-Trace-ID': traceId, ...(options.headers || {}) };
  const token = getAccessToken();
  if (endpoint.auth !== false && token) headers.Authorization = `Bearer ${token}`;
  const response = await fetch(`${pathFor(endpoint, options.pathParams)}${new URLSearchParams(options.query || {}).toString() ? `?${new URLSearchParams(options.query).toString()}` : ''}`, {
    method: endpoint.method,
    headers,
    cache: 'no-store',
    signal: options.signal,
  });
  if (!response.ok) {
    const payload = await response.json().catch(() => ({}));
    const detail = payload.error || {};
    if (response.status === 401 && endpoint.auth !== false) clearAuthSession();
    throw new ApiError(detail.message || `文件请求失败（HTTP ${response.status}）`, {
      code: detail.code,
      status: response.status,
      traceId: payload.meta?.trace_id || response.headers.get('X-Trace-ID') || traceId,
    });
  }
  return {
    blob: await response.blob(),
    filename: response.headers.get('Content-Disposition') || '',
    contentType: response.headers.get('Content-Type') || '',
    traceId: response.headers.get('X-Trace-ID') || traceId,
  };
}

export const apiClient = Object.freeze({
  get(endpointId, options = {}) { return request(endpointId, options); },
  post(endpointId, body, options = {}) { return request(endpointId, { ...options, body }); },
  /**
   * 带请求体的 PUT（更新类端点）。
   *
   * 与 `del` 同理：真正发出的方法由端点表里的 `method` 决定，所以 `post('A010')`
   * 也会发出 PUT —— 但读代码的人会以为发的是 POST。用它表达"这是更新"。
   */
  put(endpointId, body, options = {}) { return request(endpointId, { ...options, body }); },
  /**
   * 无请求体的写方法（DELETE 等）。
   *
   * 实际发什么方法由**端点表里的 `method`** 决定（`request()` 用的就是它），
   * 所以过去用 `post('K004')` 也能发出 DELETE —— 但读代码的人会以为发的是 POST。
   * 有了这个方法，`del('K004')` 的意图与行为一致。
   */
  del(endpointId, options = {}) { return request(endpointId, options); },
  upload(endpointId, formData, options = {}) { return request(endpointId, { ...options, body: formData, timeout: options.timeout || 30000 }); },
  file(endpointId, options = {}) { return requestFile(endpointId, options); },
  stream,
  reportError(error) {
    window.dispatchEvent(new CustomEvent('portal:error', { detail: { message: error.message, traceId: error.traceId || '' } }));
  },
  track(eventName, payload = {}) {
    window.dispatchEvent(new CustomEvent('portal:track', { detail: { eventName, payload, at: Date.now() } }));
  },
});

export { ENDPOINTS };