import React, { createContext, useCallback, useContext, useEffect, useMemo, useState } from 'react';
import Purchases from 'react-native-purchases';

import { MembershipModal } from '@/components/model/MembershipModal';
import { useAppDispatch, useAppSelector } from '@/hooks/redux';
import { fetchMembershipData } from '@/store/membershipSlice';
import { selectUserProfile } from '@/store/userSlice';
import { logger } from '@/utils/logger';

type MembershipModalOptions = {
  onPurchaseSuccess?: () => void;
};

interface MembershipModalContextValue {
  openMembershipModal: (options?: MembershipModalOptions) => void;
  closeMembershipModal: () => void;
}

const MembershipModalContext = createContext<MembershipModalContextValue | null>(null);

export function MembershipModalProvider({ children }: { children: React.ReactNode }) {
  const dispatch = useAppDispatch();
  const [visible, setVisible] = useState(false);
  const [pendingSuccessCallback, setPendingSuccessCallback] = useState<(() => void) | undefined>();
  const [isInitialized, setIsInitialized] = useState(false);

  // 获取用户信息，用于RevenueCat用户标识
  const userProfile = useAppSelector(selectUserProfile);

  useEffect(() => {
    // 直接使用生产环境的 API Key，避免环境变量问题
    const iosApiKey = 'appl_lmVvuLWFlXlrEsnvxMzTnKapqcc';

    const initializeRevenueCat = async () => {
      try {
        // 检查是否已经配置过，避免重复配置
        if (!isInitialized) {
          // 如果有用户ID，在配置时传入用户标识
          const configOptions: any = { apiKey: iosApiKey };

          if (userProfile?.id) {
            configOptions.appUserID = userProfile.id;
            logger.info('[MembershipModalProvider] RevenueCat SDK 初始化，使用用户ID:', userProfile.id);
          } else {
            logger.info('[MembershipModalProvider] RevenueCat SDK 初始化，未设置用户ID');
          }

          await Purchases.configure(configOptions);
          setIsInitialized(true);
          logger.info('[MembershipModalProvider] RevenueCat SDK 初始化成功');
          dispatch(fetchMembershipData());
        }
      } catch (error) {
        logger.error('[MembershipModalProvider] RevenueCat SDK 初始化失败:', error);
        // 初始化失败时不阻止应用正常运行
      }
    };

    initializeRevenueCat();
  }, [dispatch, isInitialized, userProfile?.id]);

  // 监听用户登录状态变化，在用户登录后更新RevenueCat的用户标识
  useEffect(() => {
    const updateRevenueCatUser = async () => {
      if (isInitialized && userProfile?.id) {
        try {
          // 检查当前RevenueCat的用户标识
          const customerInfo = await Purchases.getCustomerInfo();
          const currentAppUserID = customerInfo.originalAppUserId;

          // 如果当前用户ID与RevenueCat中的用户ID不同，则更新
          if (currentAppUserID !== userProfile.id) {
            console.log('[MembershipModalProvider] 更新RevenueCat用户标识:', userProfile.id);
            await Purchases.logIn(userProfile.id);
          }
          dispatch(fetchMembershipData());
        } catch (error) {
          console.error('[MembershipModalProvider] 更新RevenueCat用户标识失败:', error);
        }
      } else if (isInitialized && !userProfile?.id) {
        dispatch(fetchMembershipData());
      }
    };

    updateRevenueCatUser();
  }, [dispatch, userProfile?.id, isInitialized]);

  const openMembershipModal = useCallback((options?: MembershipModalOptions) => {
    setPendingSuccessCallback(() => options?.onPurchaseSuccess);
    setVisible(true);
  }, []);

  const closeMembershipModal = useCallback(() => {
    setVisible(false);
    setPendingSuccessCallback(undefined);
  }, []);

  const handlePurchaseSuccess = useCallback(() => {
    pendingSuccessCallback?.();
  }, [pendingSuccessCallback]);

  const contextValue = useMemo(
    () => ({
      openMembershipModal,
      closeMembershipModal,
    }),
    [closeMembershipModal, openMembershipModal],
  );

  return (
    <MembershipModalContext.Provider value={contextValue}>
      {children}
      <MembershipModal
        visible={visible}
        onClose={closeMembershipModal}
        onPurchaseSuccess={handlePurchaseSuccess}
      />
    </MembershipModalContext.Provider>
  );
}

export function useMembershipModal(): MembershipModalContextValue {
  const context = useContext(MembershipModalContext);

  if (!context) {
    logger.error('useMembershipModal must be used within a MembershipModalProvider');
    // 抛出错误而不是返回 undefined，确保类型安全
    throw new Error('useMembershipModal must be used within a MembershipModalProvider');
  }

  return context;
}