// server/api/records.get.ts - 最近问答记录接口，供 Nuxt Dashboard 表格展示
import { getQuery, setResponseStatus } from "h3";

import {
  invalidAccessTokenResponse,
  verifyAccessToken
} from "~~/server/utils/auth";
import { createApiLogger } from "~~/server/utils/logging";
import { getQaRecords } from "~~/server/utils/runtimeState";

/**
 * 最近问答记录接口
 *
 * 旧 Python Dashboard 直接在服务端模板里读取内存 records；迁移到 Nuxt 后，
 * 前端表格需要一个 JSON 数据源，所以这里暴露同样的内存记录副本。
 *
 * 安全边界：
 * - 配置 ACCESS_TOKEN 时必须携带 `X-Access-Token` 或 query `token`
 * - 这里只返回题目、选项和最终答案，不包含 OpenAI 响应体、API Key 或内部错误
 * - 记录仅存在当前进程内，重启或多实例部署不会共享
 */
export default defineEventHandler((event) => {
  const logger = createApiLogger(event, "api.records");

  if (!verifyAccessToken(event)) {
    setResponseStatus(event, 403);
    logger.warn("invalid_access_token");
    return {
      success: false,
      message: invalidAccessTokenResponse().msg,
      records: [],
      page: 1,
      size: 10,
      total: 0
    };
  }

  const query = getQuery(event);
  const rawPage = Number.parseInt(query.page?.toString() || "1", 10);
  const rawSize = Number.parseInt(query.size?.toString() || "10", 10);
  const size = Number.isFinite(rawSize)
    ? Math.min(Math.max(rawSize, 1), 100)
    : 10;
  const records = getQaRecords();
  const total = records.length;
  const maxPage = Math.max(1, Math.ceil(total / size));
  const page = Number.isFinite(rawPage)
    ? Math.min(Math.max(rawPage, 1), maxPage)
    : 1;
  const start = (page - 1) * size;
  const pageRecords = records.slice(start, start + size);

  logger.info("finish_success", {
    page,
    size,
    total,
    count: pageRecords.length
  });

  return {
    success: true,
    records: pageRecords,
    page,
    size,
    total
  };
});