// HeroPanel - DetailModal 状态管理 Hook
// 使用 useReducer 优化，减少不必要的重渲染

import { useReducer, useCallback, useMemo, useRef } from "react";

// ========== 初始状态 ==========
const initialState = {
  // UI 状态
  ztViewMode: "sector", // 'sector' | 'stock'
  selectedSectorFilter: null,
  expandedReasons: {},

  // 弹窗/抽屉状态
  detailDrawerVisible: false,
  selectedContent: null,
  sectorStocksModalVisible: false,
  selectedSectorInfo: null,
  stocksDrawerVisible: false,
  selectedEventStocks: [],
  selectedEventTime: null,
  selectedEventTitle: "",
  klineModalVisible: false,
  selectedKlineStock: null,
  relatedEventsModalVisible: false,
  selectedRelatedEvents: { sectorName: "", events: [] },

  // 数据加载状态
  stockQuotes: {},
  stockQuotesLoading: false,
};

// ========== Action Types ==========
const ActionTypes = {
  SET_ZT_VIEW_MODE: "SET_ZT_VIEW_MODE",
  SET_SECTOR_FILTER: "SET_SECTOR_FILTER",
  TOGGLE_EXPANDED_REASON: "TOGGLE_EXPANDED_REASON",
  SET_EXPANDED_REASONS: "SET_EXPANDED_REASONS",

  OPEN_CONTENT_DETAIL: "OPEN_CONTENT_DETAIL",
  CLOSE_CONTENT_DETAIL: "CLOSE_CONTENT_DETAIL",

  OPEN_SECTOR_STOCKS: "OPEN_SECTOR_STOCKS",
  CLOSE_SECTOR_STOCKS: "CLOSE_SECTOR_STOCKS",

  OPEN_EVENT_STOCKS: "OPEN_EVENT_STOCKS",
  CLOSE_EVENT_STOCKS: "CLOSE_EVENT_STOCKS",

  OPEN_KLINE_MODAL: "OPEN_KLINE_MODAL",
  CLOSE_KLINE_MODAL: "CLOSE_KLINE_MODAL",

  OPEN_RELATED_EVENTS: "OPEN_RELATED_EVENTS",
  CLOSE_RELATED_EVENTS: "CLOSE_RELATED_EVENTS",

  SET_STOCK_QUOTES: "SET_STOCK_QUOTES",
  SET_STOCK_QUOTES_LOADING: "SET_STOCK_QUOTES_LOADING",

  RESET_ALL: "RESET_ALL",
};

// ========== Reducer ==========
function reducer(state, action) {
  switch (action.type) {
    case ActionTypes.SET_ZT_VIEW_MODE:
      return { ...state, ztViewMode: action.payload };

    case ActionTypes.SET_SECTOR_FILTER:
      return { ...state, selectedSectorFilter: action.payload };

    case ActionTypes.TOGGLE_EXPANDED_REASON:
      return {
        ...state,
        expandedReasons: {
          ...state.expandedReasons,
          [action.payload]: !state.expandedReasons[action.payload],
        },
      };

    case ActionTypes.SET_EXPANDED_REASONS:
      return { ...state, expandedReasons: action.payload };

    case ActionTypes.OPEN_CONTENT_DETAIL:
      return {
        ...state,
        selectedContent: action.payload,
        detailDrawerVisible: true,
      };

    case ActionTypes.CLOSE_CONTENT_DETAIL:
      return {
        ...state,
        detailDrawerVisible: false,
        selectedContent: null,
      };

    case ActionTypes.OPEN_SECTOR_STOCKS:
      return {
        ...state,
        selectedSectorInfo: action.payload,
        sectorStocksModalVisible: true,
      };

    case ActionTypes.CLOSE_SECTOR_STOCKS:
      return {
        ...state,
        sectorStocksModalVisible: false,
        selectedSectorInfo: null,
      };

    case ActionTypes.OPEN_EVENT_STOCKS:
      return {
        ...state,
        selectedEventStocks: action.payload.stocks,
        selectedEventTime: action.payload.time,
        selectedEventTitle: action.payload.title,
        stocksDrawerVisible: true,
      };

    case ActionTypes.CLOSE_EVENT_STOCKS:
      return {
        ...state,
        stocksDrawerVisible: false,
        selectedEventStocks: [],
        selectedEventTime: null,
        selectedEventTitle: "",
      };

    case ActionTypes.OPEN_KLINE_MODAL:
      return {
        ...state,
        selectedKlineStock: action.payload,
        klineModalVisible: true,
      };

    case ActionTypes.CLOSE_KLINE_MODAL:
      return {
        ...state,
        klineModalVisible: false,
        selectedKlineStock: null,
      };

    case ActionTypes.OPEN_RELATED_EVENTS:
      return {
        ...state,
        selectedRelatedEvents: action.payload,
        relatedEventsModalVisible: true,
      };

    case ActionTypes.CLOSE_RELATED_EVENTS:
      return {
        ...state,
        relatedEventsModalVisible: false,
        selectedRelatedEvents: { sectorName: "", events: [] },
      };

    case ActionTypes.SET_STOCK_QUOTES:
      return { ...state, stockQuotes: action.payload };

    case ActionTypes.SET_STOCK_QUOTES_LOADING:
      return { ...state, stockQuotesLoading: action.payload };

    case ActionTypes.RESET_ALL:
      return initialState;

    default:
      return state;
  }
}

/**
 * DetailModal 状态管理 Hook (useReducer 优化版)
 * 将 17 个 useState 整合为单个 useReducer，减少重渲染
 */
export const useDetailModalState = () => {
  const [state, dispatch] = useReducer(reducer, initialState);

  // ========== 操作方法（稳定引用） ==========

  const setZtViewMode = useCallback((mode) => {
    dispatch({ type: ActionTypes.SET_ZT_VIEW_MODE, payload: mode });
  }, []);

  const setSelectedSectorFilter = useCallback((filter) => {
    dispatch({ type: ActionTypes.SET_SECTOR_FILTER, payload: filter });
  }, []);

  const setExpandedReasons = useCallback((reasons) => {
    dispatch({ type: ActionTypes.SET_EXPANDED_REASONS, payload: reasons });
  }, []);

  const toggleExpandedReason = useCallback((stockCode) => {
    dispatch({ type: ActionTypes.TOGGLE_EXPANDED_REASON, payload: stockCode });
  }, []);

  const openContentDetail = useCallback((content) => {
    dispatch({ type: ActionTypes.OPEN_CONTENT_DETAIL, payload: content });
  }, []);

  const closeContentDetail = useCallback(() => {
    dispatch({ type: ActionTypes.CLOSE_CONTENT_DETAIL });
  }, []);

  // 兼容旧 API：setDetailDrawerVisible
  const setDetailDrawerVisible = useCallback((visible) => {
    if (visible) {
      // 如果要显示，但没有内容，不做任何事
    } else {
      dispatch({ type: ActionTypes.CLOSE_CONTENT_DETAIL });
    }
  }, []);

  // 兼容旧 API：setSelectedContent
  const setSelectedContent = useCallback((content) => {
    if (content) {
      dispatch({ type: ActionTypes.OPEN_CONTENT_DETAIL, payload: content });
    }
  }, []);

  const openSectorStocks = useCallback((sectorInfo) => {
    dispatch({ type: ActionTypes.OPEN_SECTOR_STOCKS, payload: sectorInfo });
  }, []);

  const closeSectorStocks = useCallback(() => {
    dispatch({ type: ActionTypes.CLOSE_SECTOR_STOCKS });
  }, []);

  // 兼容旧 API
  const setSectorStocksModalVisible = useCallback((visible) => {
    if (!visible) {
      dispatch({ type: ActionTypes.CLOSE_SECTOR_STOCKS });
    }
  }, []);

  const setSelectedSectorInfo = useCallback((info) => {
    if (info) {
      dispatch({ type: ActionTypes.OPEN_SECTOR_STOCKS, payload: info });
    }
  }, []);

  const openEventStocks = useCallback((stocks, time, title) => {
    dispatch({
      type: ActionTypes.OPEN_EVENT_STOCKS,
      payload: { stocks, time, title },
    });
  }, []);

  const closeEventStocks = useCallback(() => {
    dispatch({ type: ActionTypes.CLOSE_EVENT_STOCKS });
  }, []);

  // 兼容旧 API - 支持单独设置股票数据
  // 注意：这些 setter 需要配合 setStocksDrawerVisible(true) 使用
  const pendingEventStocksRef = useRef({ stocks: null, time: null, title: null });

  const setStocksDrawerVisible = useCallback((visible) => {
    if (visible) {
      // 打开时，使用暂存的数据
      dispatch({
        type: ActionTypes.OPEN_EVENT_STOCKS,
        payload: {
          stocks: pendingEventStocksRef.current.stocks || [],
          time: pendingEventStocksRef.current.time,
          title: pendingEventStocksRef.current.title || "",
        },
      });
    } else {
      dispatch({ type: ActionTypes.CLOSE_EVENT_STOCKS });
    }
  }, []);

  const setSelectedEventStocks = useCallback((stocks) => {
    pendingEventStocksRef.current.stocks = stocks;
  }, []);

  const setSelectedEventTime = useCallback((time) => {
    pendingEventStocksRef.current.time = time;
  }, []);

  const setSelectedEventTitle = useCallback((title) => {
    pendingEventStocksRef.current.title = title;
  }, []);

  const openKlineModal = useCallback((stock) => {
    dispatch({ type: ActionTypes.OPEN_KLINE_MODAL, payload: stock });
  }, []);

  const closeKlineModal = useCallback(() => {
    dispatch({ type: ActionTypes.CLOSE_KLINE_MODAL });
  }, []);

  // 兼容旧 API
  const setKlineModalVisible = useCallback((visible) => {
    if (!visible) {
      dispatch({ type: ActionTypes.CLOSE_KLINE_MODAL });
    }
  }, []);

  const setSelectedKlineStock = useCallback((stock) => {
    if (stock) {
      dispatch({ type: ActionTypes.OPEN_KLINE_MODAL, payload: stock });
    }
  }, []);

  const openRelatedEvents = useCallback((sectorName, events) => {
    dispatch({
      type: ActionTypes.OPEN_RELATED_EVENTS,
      payload: { sectorName, events },
    });
  }, []);

  const closeRelatedEvents = useCallback(() => {
    dispatch({ type: ActionTypes.CLOSE_RELATED_EVENTS });
  }, []);

  // 兼容旧 API
  const setRelatedEventsModalVisible = useCallback((visible) => {
    if (!visible) {
      dispatch({ type: ActionTypes.CLOSE_RELATED_EVENTS });
    }
  }, []);

  const setSelectedRelatedEvents = useCallback((data) => {
    if (data && data.sectorName) {
      dispatch({ type: ActionTypes.OPEN_RELATED_EVENTS, payload: data });
    }
  }, []);

  const setStockQuotes = useCallback((quotes) => {
    dispatch({ type: ActionTypes.SET_STOCK_QUOTES, payload: quotes });
  }, []);

  const setStockQuotesLoading = useCallback((loading) => {
    dispatch({ type: ActionTypes.SET_STOCK_QUOTES_LOADING, payload: loading });
  }, []);

  const resetAllState = useCallback(() => {
    dispatch({ type: ActionTypes.RESET_ALL });
  }, []);

  // ========== 返回值（保持兼容性） ==========
  return useMemo(
    () => ({
      // UI 状态 + setters
      ztViewMode: state.ztViewMode,
      setZtViewMode,
      selectedSectorFilter: state.selectedSectorFilter,
      setSelectedSectorFilter,
      expandedReasons: state.expandedReasons,
      setExpandedReasons,

      // 弹窗状态 + setters
      detailDrawerVisible: state.detailDrawerVisible,
      setDetailDrawerVisible,
      selectedContent: state.selectedContent,
      setSelectedContent,
      sectorStocksModalVisible: state.sectorStocksModalVisible,
      setSectorStocksModalVisible,
      selectedSectorInfo: state.selectedSectorInfo,
      setSelectedSectorInfo,
      stocksDrawerVisible: state.stocksDrawerVisible,
      setStocksDrawerVisible,
      selectedEventStocks: state.selectedEventStocks,
      setSelectedEventStocks,
      selectedEventTime: state.selectedEventTime,
      setSelectedEventTime,
      selectedEventTitle: state.selectedEventTitle,
      setSelectedEventTitle,
      klineModalVisible: state.klineModalVisible,
      setKlineModalVisible,
      selectedKlineStock: state.selectedKlineStock,
      setSelectedKlineStock,
      relatedEventsModalVisible: state.relatedEventsModalVisible,
      setRelatedEventsModalVisible,
      selectedRelatedEvents: state.selectedRelatedEvents,
      setSelectedRelatedEvents,

      // 数据状态 + setters
      stockQuotes: state.stockQuotes,
      setStockQuotes,
      stockQuotesLoading: state.stockQuotesLoading,
      setStockQuotesLoading,

      // 操作方法（高级封装）
      openContentDetail,
      closeContentDetail,
      openSectorStocks,
      closeSectorStocks,
      openEventStocks,
      closeEventStocks,
      openKlineModal,
      closeKlineModal,
      openRelatedEvents,
      closeRelatedEvents,
      toggleExpandedReason,
      resetAllState,
    }),
    [
      state,
      setZtViewMode,
      setSelectedSectorFilter,
      setExpandedReasons,
      setDetailDrawerVisible,
      setSelectedContent,
      setSectorStocksModalVisible,
      setSelectedSectorInfo,
      setStocksDrawerVisible,
      setSelectedEventStocks,
      setSelectedEventTime,
      setSelectedEventTitle,
      setKlineModalVisible,
      setSelectedKlineStock,
      setRelatedEventsModalVisible,
      setSelectedRelatedEvents,
      setStockQuotes,
      setStockQuotesLoading,
      openContentDetail,
      closeContentDetail,
      openSectorStocks,
      closeSectorStocks,
      openEventStocks,
      closeEventStocks,
      openKlineModal,
      closeKlineModal,
      openRelatedEvents,
      closeRelatedEvents,
      toggleExpandedReason,
      resetAllState,
    ]
  );
};

export default useDetailModalState;