// app/stores/answer.ts - 答题页和 Dashboard 的统一状态管理
import { defineStore } from "pinia";

import type {
  IHealthResponse,
  IQaRecord,
  ISearchSuccessResponse,
  IStatsResponse,
  QuestionType
} from "@/interfaces";
import { AnswerService } from "@/services";
import { formatUptime, getClientErrorMessage } from "~/utils";

/** Dashboard 最近记录表格每页数量，组件直接复用，避免多个地方写死 */
export const DASHBOARD_RECORD_PAGE_SIZE = 10;

/** 分页大小可选列表，与后端白名单保持一致 */
export const DASHBOARD_PAGE_SIZE_OPTIONS = [10, 50, 100] as const;

/** 题型下拉选项，value 保持 OCS / 旧 Python 服务使用的英文值 */
export const QUESTION_TYPE_OPTIONS: Array<{
  label: string;
  value: QuestionType;
}> = [
  { label: "自动判断", value: "" },
  { label: "单选题", value: "single" },
  { label: "多选题", value: "multiple" },
  { label: "判断题", value: "judgement" },
  { label: "填空题", value: "completion" }
];

/** 题型展示文案，Dashboard 表格用它把英文值转成本地业务表达 */
export const QUESTION_TYPE_LABELS: Record<string, string> = {
  "": "自动判断",
  single: "单选题",
  multiple: "多选题",
  judgement: "判断题",
  completion: "填空题"
};

/** OCS AI 答题服务前端状态管理 */
export const useAnswerStore = defineStore("answer", () => {
  // ---- 答题表单状态 ----
  /** 当前问题内容 */
  const question = ref("");
  /** 当前问题类型 */
  const questionType = ref<QuestionType>("");
  /** 当前问题选项 */
  const options = ref("");
  /** 答题请求加载状态 */
  const searchLoading = ref(false);
  /** 答题结果 */
  const answerResult = ref<ISearchSuccessResponse>();
  /** 答题错误文案 */
  const searchErrorMessage = ref("");

  // ---- Dashboard 状态 ----
  /** 健康检查信息 */
  const health = ref<IHealthResponse>();
  /** 运行统计信息 */
  const stats = ref<IStatsResponse>();
  /** 最近问答记录 */
  const records = ref<IQaRecord[]>([]);
  /** Dashboard 错误文案 */
  const dashboardErrorMessage = ref("");
  /** 统计信息加载状态 */
  const statsLoading = ref(false);
  /** 最近问答记录加载状态 */
  const recordsLoading = ref(false);
  /** 缓存清理状态 */
  const cacheClearing = ref(false);
  /** 最近问答记录当前页码 */
  const recordsPage = ref(1);
  /** 最近问答记录每页数量 */
  const recordsPageSize = ref(DASHBOARD_RECORD_PAGE_SIZE);
  /** 最近问答记录总数 */
  const recordCount = ref(0);
  /** 当前选中的问答记录 */
  const selectedRecord = ref<IQaRecord>();

  /** Dashboard 表格当前页数据，页码切换会重新请求服务端分页接口 */
  const pagedRecords = computed(() => records.value);

  /** Dashboard 顶部运行时长展示 */
  const uptimeText = computed(() => {
    return stats.value ? formatUptime(stats.value.uptime) : "-";
  });

  /** 选择表格记录，交给详情弹窗展示完整题目、选项和答案 */
  const selectRecord = (record?: IQaRecord) => {
    selectedRecord.value = record;
  };

  /** 切换最近记录表格页码，并请求对应页数据 */
  const setRecordsPage = async (page: number) => {
    if (recordsLoading.value || page === recordsPage.value) return;
    await getRecords(page);
  };

  /** 切换分页大小，重置到第 1 页后重新请求 */
  const setRecordsPageSize = async (size: number) => {
    if (recordsLoading.value || size === recordsPageSize.value) return;
    recordsPageSize.value = size;
    await getRecords(1);
  };

  /** 调用答题 API，返回 OCS 兼容结构但只在 store 中维护 UI 状态 */
  const searchAnswer = async () => {
    const title = question.value.trim();
    const requestOptions = options.value.trim();

    answerResult.value = undefined;
    searchErrorMessage.value = "";

    if (!title) {
      searchErrorMessage.value = "未提供问题内容";
      return;
    }

    searchLoading.value = true;
    try {
      const res = await AnswerService.search({
        title,
        type: questionType.value,
        options: requestOptions
      });

      if (res.data.code === 1) {
        answerResult.value = res.data;
        recordsPage.value = 1;
        await Promise.allSettled([getStats(), getRecords()]);
        return;
      }

      searchErrorMessage.value = res.data.msg || "答题失败";
    } catch (error) {
      searchErrorMessage.value = getClientErrorMessage(error, "服务器内部错误");
    } finally {
      searchLoading.value = false;
    }
  };

  /** 读取健康检查，失败时只写本地错误文案 */
  const getHealth = async () => {
    try {
      const res = await AnswerService.getHealth();
      health.value = res.data.data;
    } catch (error) {
      dashboardErrorMessage.value = getClientErrorMessage(
        error,
        "健康检查失败"
      );
    }
  };

  /** 读取运行统计 */
  const getStats = async () => {
    statsLoading.value = true;
    try {
      const res = await AnswerService.getStats();
      stats.value = res.data.data;
    } catch (error) {
      dashboardErrorMessage.value = getClientErrorMessage(
        error,
        "统计信息读取失败"
      );
    } finally {
      statsLoading.value = false;
    }
  };

  /** 读取最近问答记录；服务端按 page/size 返回当前页数据 */
  const getRecords = async (page = recordsPage.value) => {
    recordsLoading.value = true;
    try {
      const res = await AnswerService.getRecords({
        page,
        size: recordsPageSize.value
      });
      records.value = res.data.data.records;
      recordsPage.value = res.data.data.page;
      recordsPageSize.value = res.data.data.size;
      recordCount.value = res.data.data.total;
    } catch (error) {
      dashboardErrorMessage.value = getClientErrorMessage(
        error,
        "问答记录读取失败"
      );
    } finally {
      recordsLoading.value = false;
    }
  };

  /** Dashboard 首次加载时并行拉取运行状态、统计和最近记录 */
  const loadDashboard = async () => {
    dashboardErrorMessage.value = "";
    await Promise.allSettled([getHealth(), getStats(), getRecords()]);
  };

  /** 清空缓存后刷新统计与表格；$fetch 非 2xx 时会抛出，错误由 catch 处理 */
  const clearCache = async () => {
    cacheClearing.value = true;
    dashboardErrorMessage.value = "";

    try {
      await AnswerService.clearCache();
      await Promise.allSettled([getStats(), getRecords(1)]);
    } catch (error) {
      dashboardErrorMessage.value = getClientErrorMessage(
        error,
        "缓存清理失败"
      );
    } finally {
      cacheClearing.value = false;
    }
  };

  return {
    question,
    questionType,
    options,
    searchLoading,
    answerResult,
    searchErrorMessage,
    health,
    stats,
    records,
    dashboardErrorMessage,
    statsLoading,
    recordsLoading,
    cacheClearing,
    recordsPage,
    recordsPageSize,
    selectedRecord,
    pagedRecords,
    recordCount,
    uptimeText,
    searchAnswer,
    getHealth,
    getStats,
    getRecords,
    loadDashboard,
    clearCache,
    selectRecord,
    setRecordsPage,
    setRecordsPageSize
  };
});