// src/views/Company/components/DeepAnalysis/index.js
// 深度分析 - 独立一级 Tab 组件（懒加载版本）

import React, { useState, useEffect, useCallback, useRef } from "react";
import { logger } from "@utils/logger";
import { getApiBase } from "@utils/apiConfig";

// 复用原有的展示组件
import DeepAnalysisTab from "../CompanyOverview/DeepAnalysisTab";

const API_BASE_URL = getApiBase();

/**
 * Tab 与 API 接口映射
 * - strategy 和 business 共用 comprehensive 接口
 */
const TAB_API_MAP = {
  strategy: "comprehensive",
  business: "comprehensive",
  valueChain: "valueChain",
  development: "keyFactors",
};

/**
 * 深度分析组件
 *
 * 功能：
 * - 按 Tab 懒加载数据（默认只加载战略分析）
 * - 已加载的数据缓存，切换 Tab 不重复请求
 * - 管理展开状态
 *
 * @param {Object} props
 * @param {string} props.stockCode - 股票代码
 */
const DeepAnalysis = ({ stockCode }) => {
  // 当前 Tab
  const [activeTab, setActiveTab] = useState("strategy");

  // 数据状态
  const [comprehensiveData, setComprehensiveData] = useState(null);
  const [valueChainData, setValueChainData] = useState(null);
  const [keyFactorsData, setKeyFactorsData] = useState(null);
  const [industryRankData, setIndustryRankData] = useState(null);

  // 各接口独立的 loading 状态
  const [comprehensiveLoading, setComprehensiveLoading] = useState(false);
  const [valueChainLoading, setValueChainLoading] = useState(false);
  const [keyFactorsLoading, setKeyFactorsLoading] = useState(false);
  const [industryRankLoading, setIndustryRankLoading] = useState(false);

  // 已加载的接口记录（用于缓存判断）
  const loadedApisRef = useRef({
    comprehensive: false,
    valueChain: false,
    keyFactors: false,
    industryRank: false,
  });

  // 业务板块展开状态
  const [expandedSegments, setExpandedSegments] = useState({});

  // 用于追踪当前 stockCode，避免竞态条件
  const currentStockCodeRef = useRef(stockCode);

  // 切换业务板块展开状态
  const toggleSegmentExpansion = (segmentIndex) => {
    setExpandedSegments((prev) => ({
      ...prev,
      [segmentIndex]: !prev[segmentIndex],
    }));
  };

  /**
   * 加载指定接口的数据
   */
  const loadApiData = useCallback(
    async (apiKey) => {
      if (!stockCode) return;

      // 已加载则跳过
      if (loadedApisRef.current[apiKey]) return;

      try {
        switch (apiKey) {
          case "comprehensive":
            setComprehensiveLoading(true);
            const comprehensiveRes = await fetch(
              `${API_BASE_URL}/api/company/comprehensive-analysis/${stockCode}`
            ).then((r) => r.json());
            // 检查 stockCode 是否已变更（防止竞态）
            if (currentStockCodeRef.current === stockCode) {
              if (comprehensiveRes.success)
                setComprehensiveData(comprehensiveRes.data);
              loadedApisRef.current.comprehensive = true;
            }
            break;

          case "valueChain":
            setValueChainLoading(true);
            const valueChainRes = await fetch(
              `${API_BASE_URL}/api/company/value-chain-analysis/${stockCode}`
            ).then((r) => r.json());
            if (currentStockCodeRef.current === stockCode) {
              if (valueChainRes.success) setValueChainData(valueChainRes.data);
              loadedApisRef.current.valueChain = true;
            }
            break;

          case "keyFactors":
            setKeyFactorsLoading(true);
            const keyFactorsRes = await fetch(
              `${API_BASE_URL}/api/company/key-factors-timeline/${stockCode}`
            ).then((r) => r.json());
            if (currentStockCodeRef.current === stockCode) {
              if (keyFactorsRes.success) setKeyFactorsData(keyFactorsRes.data);
              loadedApisRef.current.keyFactors = true;
            }
            break;

          case "industryRank":
            setIndustryRankLoading(true);
            const industryRankRes = await fetch(
              `${API_BASE_URL}/api/financial/industry-rank/${stockCode}`
            ).then((r) => r.json());
            if (currentStockCodeRef.current === stockCode) {
              if (industryRankRes.success) setIndustryRankData(industryRankRes.data);
              loadedApisRef.current.industryRank = true;
            }
            break;

          default:
            break;
        }
      } catch (err) {
        logger.error("DeepAnalysis", `loadApiData:${apiKey}`, err, {
          stockCode,
        });
      } finally {
        // 清除 loading 状态
        if (apiKey === "comprehensive") setComprehensiveLoading(false);
        if (apiKey === "valueChain") setValueChainLoading(false);
        if (apiKey === "keyFactors") setKeyFactorsLoading(false);
        if (apiKey === "industryRank") setIndustryRankLoading(false);
      }
    },
    [stockCode]
  );

  /**
   * 根据 Tab 加载对应的数据
   */
  const loadTabData = useCallback(
    (tabKey) => {
      const apiKey = TAB_API_MAP[tabKey];
      if (apiKey) {
        loadApiData(apiKey);
      }
    },
    [loadApiData]
  );

  /**
   * Tab 切换回调
   */
  const handleTabChange = useCallback(
    (index, tabKey) => {
      setActiveTab(tabKey);
      loadTabData(tabKey);
    },
    [loadTabData]
  );

  // stockCode 变更时重置并加载默认 Tab 数据
  useEffect(() => {
    if (stockCode) {
      // 更新 ref
      currentStockCodeRef.current = stockCode;

      // 重置所有数据和状态
      setComprehensiveData(null);
      setValueChainData(null);
      setKeyFactorsData(null);
      setIndustryRankData(null);
      setExpandedSegments({});
      loadedApisRef.current = {
        comprehensive: false,
        valueChain: false,
        keyFactors: false,
        industryRank: false,
      };

      // 重置为默认 Tab 并加载数据
      setActiveTab("strategy");
      // 加载默认 Tab 的数据（战略分析需要 comprehensive 和 industryRank）
      loadApiData("comprehensive");
      loadApiData("industryRank");
    }
  }, [stockCode, loadApiData]);

  // 计算当前 Tab 的 loading 状态
  const getCurrentLoading = () => {
    const apiKey = TAB_API_MAP[activeTab];
    switch (apiKey) {
      case "comprehensive":
        return comprehensiveLoading;
      case "valueChain":
        return valueChainLoading;
      case "keyFactors":
        return keyFactorsLoading;
      default:
        return false;
    }
  };

  return (
    <DeepAnalysisTab
      comprehensiveData={comprehensiveData}
      valueChainData={valueChainData}
      keyFactorsData={keyFactorsData}
      industryRankData={industryRankData}
      loading={getCurrentLoading()}
      cardBg="white"
      expandedSegments={expandedSegments}
      onToggleSegment={toggleSegmentExpansion}
      activeTab={activeTab}
      onTabChange={handleTabChange}
    />
  );
};

export default DeepAnalysis;