// src/components/EventDetailPanel/DynamicNewsDetailPanel.js
// 动态新闻详情面板主组件（组装所有子组件）

import React, { useState, useCallback, useEffect, useReducer } from 'react';
import { useDispatch, useSelector } from 'react-redux';
import {
  Card,
  CardBody,
  VStack,
  Text,
  Spinner,
  Center,
  Wrap,
  WrapItem,
  Box,
} from '@chakra-ui/react';
import { getImportanceConfig } from '@constants/importanceLevels';
import { eventService } from '@services/eventService';
import { useEventStocks } from '@views/Community/components/StockDetailPanel/hooks/useEventStocks';
import { toggleEventFollow, selectEventFollowStatus } from '@store/slices/communityDataSlice';
import { useAuth } from '@contexts/AuthContext';
import EventHeaderInfo from './EventHeaderInfo';
import CompactMetaBar from './CompactMetaBar';
import EventDescriptionSection from './EventDescriptionSection';
import RelatedConceptsSection from './RelatedConceptsSection';
import RelatedStocksSection from './RelatedStocksSection';
import CompactStockItem from './CompactStockItem';
import CollapsibleSection from './CollapsibleSection';
import HistoricalEvents from '@views/EventDetail/components/HistoricalEvents';
import TransmissionChainAnalysis from '@views/EventDetail/components/TransmissionChainAnalysis';
import SubscriptionBadge from '@components/SubscriptionBadge';
import SubscriptionUpgradeModal from '@components/SubscriptionUpgradeModal';
import { PROFESSIONAL_COLORS } from '@constants/professionalTheme';
import { useWatchlist } from '@hooks/useWatchlist';
import EventCommentSection from '@components/EventCommentSection';

// 折叠区块状态管理 - 使用 useReducer 整合
const initialSectionState = {
  stocks: { isOpen: true, hasLoaded: false, hasLoadedQuotes: false },
  concepts: { isOpen: false },
  historical: { isOpen: false, hasLoaded: false },
  transmission: { isOpen: false, hasLoaded: false }
};

const sectionReducer = (state, action) => {
  switch (action.type) {
    case 'TOGGLE':
      return {
        ...state,
        [action.section]: {
          ...state[action.section],
          isOpen: !state[action.section].isOpen
        }
      };
    case 'SET_LOADED':
      return {
        ...state,
        [action.section]: {
          ...state[action.section],
          hasLoaded: true
        }
      };
    case 'SET_QUOTES_LOADED':
      return {
        ...state,
        stocks: { ...state.stocks, hasLoadedQuotes: true }
      };
    case 'RESET_ALL':
      return {
        stocks: { isOpen: true, hasLoaded: false, hasLoadedQuotes: false },
        concepts: { isOpen: false },
        historical: { isOpen: false, hasLoaded: false },
        transmission: { isOpen: false, hasLoaded: false }
      };
    default:
      return state;
  }
};

/**
 * 动态新闻详情面板主组件
 * @param {Object} props
 * @param {Object} props.event - 事件对象（包含详情数据）
 * @param {boolean} props.showHeader - 是否显示头部信息（默认 true）
 */
const DynamicNewsDetailPanel = ({ event, showHeader = true }) => {
  const dispatch = useDispatch();
  const { user } = useAuth();
  const cardBg = PROFESSIONAL_COLORS.background.card;
  const borderColor = PROFESSIONAL_COLORS.border.default;
  const textColor = PROFESSIONAL_COLORS.text.secondary;

  // 使用 useWatchlist Hook 管理自选股
  const {
    handleAddToWatchlist,
    handleRemoveFromWatchlist,
    isInWatchlist,
    loadWatchlistQuotes
  } = useWatchlist();

  // 获取用户会员等级（修复：字段名从 subscription_tier 改为 subscription_type）
  const userTier = user?.subscription_type || 'free';

  // 从 Redux 读取关注状态
  const eventFollowStatus = useSelector(selectEventFollowStatus);
  const isFollowing = event?.id ? (eventFollowStatus[event.id]?.isFollowing || false) : false;
  const followerCount = event?.id ? (eventFollowStatus[event.id]?.followerCount || event.follower_count || 0) : 0;

  // 🎯 浏览量机制：存储从 API 获取的完整事件详情（包含最新 view_count）
  const [fullEventDetail, setFullEventDetail] = useState(null);
  const [loadingDetail, setLoadingDetail] = useState(false);

  // 权限判断函数
  const hasAccess = useCallback((requiredTier) => {
    const tierLevel = { free: 0, pro: 1, max: 2 };
    const result = tierLevel[userTier] >= tierLevel[requiredTier];
    return result;
  }, [userTier]);

  // 升级弹窗状态
  const [upgradeModal, setUpgradeModal] = useState({
    isOpen: false,
    requiredLevel: 'pro',
    featureName: ''
  });

  // 使用 Hook 获取实时数据
  // - autoLoad: false - 禁用自动加载所有数据，改为手动触发
  // - autoLoadQuotes: true - 股票数据加载后自动加载行情（相关股票默认展开）
  const {
    stocks,
    quotes,
    eventDetail,
    historicalEvents,
    expectationScore,
    loading,
    loadStocksData,
    loadHistoricalData,
    loadChainAnalysis,
    refreshQuotes
  } = useEventStocks(event?.id, event?.created_at, { autoLoad: false, autoLoadQuotes: true });

  // 🎯 加载事件详情（增加浏览量）- 与 EventDetailModal 保持一致
  const loadEventDetail = useCallback(async () => {
    if (!event?.id) return;

    setLoadingDetail(true);
    try {
      const response = await eventService.getEventDetail(event.id);
      if (response.success) {
        setFullEventDetail(response.data);
      }
    } catch (error) {
      console.error('[DynamicNewsDetailPanel] loadEventDetail 失败:', error, {
        eventId: event?.id
      });
    } finally {
      setLoadingDetail(false);
    }
  }, [event?.id]);

  // 相关股票、相关概念、历史事件和传导链的权限
  const canAccessStocks = hasAccess('pro');
  const canAccessConcepts = hasAccess('pro');
  const canAccessHistorical = hasAccess('pro');
  const canAccessTransmission = hasAccess('max');

  // 子区块折叠状态管理 - 使用 useReducer 整合
  const [sectionState, dispatchSection] = useReducer(sectionReducer, initialSectionState);

  // 锁定点击处理 - 弹出升级弹窗
  const handleLockedClick = useCallback((featureName, requiredLevel) => {
    setUpgradeModal({
      isOpen: true,
      requiredLevel,
      featureName
    });
  }, []);

  // 关闭升级弹窗
  const handleCloseUpgradeModal = useCallback(() => {
    setUpgradeModal({
      isOpen: false,
      requiredLevel: 'pro',
      featureName: ''
    });
  }, []);

  // 相关股票 - 展开时加载行情（需要 PRO 权限）
  const handleStocksToggle = useCallback(() => {
    const willOpen = !sectionState.stocks.isOpen;
    dispatchSection({ type: 'TOGGLE', section: 'stocks' });

    // 展开时加载行情数据（如果还没加载过）
    if (willOpen && !sectionState.stocks.hasLoadedQuotes && stocks.length > 0) {
      refreshQuotes();
      dispatchSection({ type: 'SET_QUOTES_LOADED' });
    }
  }, [sectionState.stocks, stocks.length, refreshQuotes]);

  // 相关概念 - 展开/收起（无需加载）
  const handleConceptsToggle = useCallback(() => {
    dispatchSection({ type: 'TOGGLE', section: 'concepts' });
  }, []);

  // 历史事件对比 - 数据已预加载，只需切换展开状态
  const handleHistoricalToggle = useCallback(() => {
    dispatchSection({ type: 'TOGGLE', section: 'historical' });
  }, []);

  // 传导链分析 - 展开时加载
  const handleTransmissionToggle = useCallback(() => {
    const willOpen = !sectionState.transmission.isOpen;
    dispatchSection({ type: 'TOGGLE', section: 'transmission' });

    if (willOpen && !sectionState.transmission.hasLoaded) {
      loadChainAnalysis();
      dispatchSection({ type: 'SET_LOADED', section: 'transmission' });
    }
  }, [sectionState.transmission, loadChainAnalysis]);

  // 事件切换时重置所有子模块状态
  useEffect(() => {
    // 加载事件详情（增加浏览量）
    loadEventDetail();

    // 加载自选股数据（用于判断股票是否已关注）
    loadWatchlistQuotes();

    // 重置所有折叠区块状态
    dispatchSection({ type: 'RESET_ALL' });

    // 相关股票默认展开，预加载股票列表和行情数据
    if (canAccessStocks) {
      loadStocksData();
      dispatchSection({ type: 'SET_LOADED', section: 'stocks' });
      dispatchSection({ type: 'SET_QUOTES_LOADED' });
    }

    // 历史事件默认折叠，但预加载数据（显示数量吸引点击）
    if (canAccessHistorical) {
      loadHistoricalData();
      dispatchSection({ type: 'SET_LOADED', section: 'historical' });
    }
  }, [event?.id, canAccessStocks, canAccessHistorical, userTier, loadStocksData, loadHistoricalData, loadEventDetail, loadWatchlistQuotes]);

  // 切换关注状态
  const handleToggleFollow = useCallback(async () => {
    if (!event?.id) return;
    dispatch(toggleEventFollow(event.id));
  }, [dispatch, event?.id]);

  // 切换自选股（使用 useWatchlist Hook）
  const handleWatchlistToggle = useCallback(async (stockCode, stockName, currentlyInWatchlist) => {
    if (currentlyInWatchlist) {
      await handleRemoveFromWatchlist(stockCode);
    } else {
      await handleAddToWatchlist(stockCode, stockName);
    }
  }, [handleAddToWatchlist, handleRemoveFromWatchlist]);

  // 空状态
  if (!event) {
    return (
      <Card bg={cardBg} borderColor={borderColor} borderWidth="1px">
        <CardBody>
          <Text color={textColor} textAlign="center">
            请选择一个事件查看详情
          </Text>
        </CardBody>
      </Card>
    );
  }

  const importance = getImportanceConfig(event.importance);

  return (
    <Card bg={cardBg} borderColor={borderColor} borderWidth="1px">
      <CardBody position="relative">
        {/* 无头部模式：显示右上角精简信息栏 */}
        {!showHeader && (
          <CompactMetaBar
            event={fullEventDetail || event}
            importance={importance}
            isFollowing={isFollowing}
            followerCount={followerCount}
            onToggleFollow={handleToggleFollow}
          />
        )}

        <VStack align="stretch" spacing={3}>
          {/* 头部信息区 - 优先使用完整详情数据（包含最新浏览量） - 可配置显示/隐藏 */}
          {showHeader && (
            <EventHeaderInfo
              event={fullEventDetail || event}
              importance={importance}
              isFollowing={isFollowing}
              followerCount={followerCount}
              onToggleFollow={handleToggleFollow}
            />
          )}

          {/* 事件描述 */}
          <EventDescriptionSection description={event.description} />

          {/* 相关股票（可折叠） - 懒加载 - 需要 PRO 权限 - 支持精简/详细模式 */}
          <CollapsibleSection
            title="相关股票"
            isOpen={sectionState.stocks.isOpen}
            onToggle={handleStocksToggle}
            count={stocks?.length || 0}
            subscriptionBadge={!canAccessStocks ? <SubscriptionBadge tier="pro" size="sm" /> : null}
            isLocked={!canAccessStocks}
            onLockedClick={() => handleLockedClick('相关股票', 'pro')}
            showModeToggle={canAccessStocks}
            defaultMode="detailed"
            simpleContent={
              loading.stocks || loading.quotes ? (
                <Center py={2}>
                  <Spinner size="sm" color="blue.500" />
                  <Text ml={2} color={textColor} fontSize="sm">加载股票数据中...</Text>
                </Center>
              ) : (
                <Wrap spacing={4}>
                  {stocks?.map((stock, index) => (
                    <WrapItem key={index}>
                      <CompactStockItem
                        stock={stock}
                        quote={quotes[stock.stock_code]}
                      />
                    </WrapItem>
                  ))}
                </Wrap>
              )
            }
          >
            {loading.stocks || loading.quotes ? (
              <Center py={4}>
                <Spinner size="md" color="blue.500" />
                <Text ml={2} color={textColor}>加载股票数据中...</Text>
              </Center>
            ) : (
              <RelatedStocksSection
                stocks={stocks}
                quotes={quotes}
                eventTime={event.created_at}
                isInWatchlist={isInWatchlist}
                onWatchlistToggle={handleWatchlistToggle}
              />
            )}
          </CollapsibleSection>

          {/* 相关概念（可折叠） - 需要 PRO 权限 */}
          <RelatedConceptsSection
            eventTitle={event.title}
            effectiveTradingDate={event.trading_date || event.created_at}
            eventTime={event.created_at}
            isOpen={sectionState.concepts.isOpen}
            onToggle={handleConceptsToggle}
            subscriptionBadge={!canAccessConcepts ? <SubscriptionBadge tier="pro" size="sm" /> : null}
            isLocked={!canAccessConcepts}
            onLockedClick={() => handleLockedClick('相关概念', 'pro')}
          />

          {/* 历史事件对比（可折叠） - 懒加载 - 需要 PRO 权限 */}
          <CollapsibleSection
            title="历史事件对比"
            isOpen={sectionState.historical.isOpen}
            onToggle={handleHistoricalToggle}
            count={historicalEvents?.length || 0}
            subscriptionBadge={!canAccessHistorical ? <SubscriptionBadge tier="pro" size="sm" /> : null}
            isLocked={!canAccessHistorical}
            onLockedClick={() => handleLockedClick('历史事件对比', 'pro')}
          >
            {loading.historicalEvents ? (
              <Center py={4}>
                <Spinner size="sm" color="blue.500" />
                <Text ml={2} color={textColor} fontSize="sm">加载历史事件...</Text>
              </Center>
            ) : (
              <HistoricalEvents
                events={historicalEvents || []}
                expectationScore={expectationScore}
              />
            )}
          </CollapsibleSection>

          {/* 传导链分析（可折叠） - 懒加载 - 需要 MAX 权限 */}
          <CollapsibleSection
            title="传导链分析"
            isOpen={sectionState.transmission.isOpen}
            onToggle={handleTransmissionToggle}
            subscriptionBadge={!canAccessTransmission ? <SubscriptionBadge tier="max" size="sm" /> : null}
            isLocked={!canAccessTransmission}
            onLockedClick={() => handleLockedClick('传导链分析', 'max')}
          >
            <TransmissionChainAnalysis
              eventId={event.id}
              eventService={eventService}
            />
          </CollapsibleSection>

          {/* 讨论区（评论区） - 所有登录用户可用 */}
          <Box>
            <EventCommentSection eventId={event.id} />
          </Box>
        </VStack>
      </CardBody>

      {/* 升级弹窗 */}
      {upgradeModal.isOpen ? (
        <SubscriptionUpgradeModal
          isOpen={upgradeModal.isOpen}
          onClose={handleCloseUpgradeModal}
          requiredLevel={upgradeModal.requiredLevel}
          featureName={upgradeModal.featureName}
          currentLevel={userTier}
        />
      ) : null}
    </Card>
  );
};

export default DynamicNewsDetailPanel;