/**
 * URL Scheme 跳转组件
 * 用于外部浏览器跳转小程序
 */
import React, { useState, useCallback } from 'react';
import {
  Box,
  Button,
  Modal,
  ModalOverlay,
  ModalContent,
  ModalHeader,
  ModalBody,
  ModalFooter,
  ModalCloseButton,
  Text,
  VStack,
  useDisclosure,
  useToast,
  Icon,
} from '@chakra-ui/react';
import { ExternalLink, Copy, Check } from 'lucide-react';
import { isIOSDevice } from './hooks/useWechatEnvironment';

// 小程序 AppID
const MINIPROGRAM_APPID = 'wx0edeaab76d4fa414';

/**
 * 生成明文 URL Scheme
 * 格式：weixin://dl/business/?appid=APPID&path=PATH&query=QUERY
 * 注意：path 不需要 URL encode，否则微信无法识别
 */
const generatePlainUrlScheme = (path, query) => {
  let url = `weixin://dl/business/?appid=${MINIPROGRAM_APPID}&path=${path || ''}`;
  if (query) {
    url += `&query=${encodeURIComponent(query)}`;
  }
  return url;
};

/**
 * URL Scheme 跳转组件
 * @param {Object} props
 * @param {string} [props.path] - 小程序页面路径
 * @param {string} [props.query] - 页面参数
 * @param {React.ReactNode} props.children - 按钮内容
 * @param {Function} [props.onSuccess] - 跳转成功回调
 * @param {Function} [props.onError] - 跳转失败回调
 * @param {Object} [props.buttonProps] - 按钮属性
 * @param {Object} [props.buttonStyle] - 按钮内联样式
 */
const UrlSchemeLauncher = ({
  path = '',
  query = '',
  children,
  onSuccess,
  onError,
  buttonProps = {},
  buttonStyle = {},
}) => {
  const [loading, setLoading] = useState(false);
  const [openlink, setOpenlink] = useState(null);
  const [copied, setCopied] = useState(false);
  const { isOpen, onOpen, onClose } = useDisclosure();
  const toast = useToast();

  const isIOS = isIOSDevice();

  // 处理点击跳转
  const handleLaunch = useCallback(async () => {
    try {
      setLoading(true);

      // 生成明文 URL Scheme（不需要后端 API）
      const scheme = generatePlainUrlScheme(path, query);
      console.log('[UrlSchemeLauncher] 生成的 scheme:', scheme);

      setOpenlink(scheme);

      // 尝试直接跳转
      window.location.href = scheme;
      const success = true;

      if (success) {
        onSuccess?.();
        // iOS 上可能会弹出确认框，显示引导弹窗
        if (isIOS) {
          setTimeout(() => {
            onOpen();
          }, 500);
        }
      } else {
        // 跳转失败，显示引导弹窗
        onOpen();
      }
    } catch (error) {
      console.error('[UrlSchemeLauncher] error:', error);
      toast({
        title: '跳转失败',
        description: error.message || '请稍后重试',
        status: 'error',
        duration: 3000,
      });
      onError?.(error);
    } finally {
      setLoading(false);
    }
  }, [path, query, onSuccess, onError, onOpen, toast, isIOS]);

  // 复制链接
  const handleCopy = useCallback(async () => {
    if (!openlink) return;

    try {
      await navigator.clipboard.writeText(openlink);
      setCopied(true);
      toast({
        title: '已复制',
        description: '请在微信中打开',
        status: 'success',
        duration: 2000,
      });
      setTimeout(() => setCopied(false), 2000);
    } catch (error) {
      toast({
        title: '复制失败',
        description: '请手动复制',
        status: 'error',
        duration: 2000,
      });
    }
  }, [openlink, toast]);

  // 再次尝试跳转
  const handleRetry = useCallback(() => {
    if (openlink) {
      window.location.href = openlink;
    }
  }, [openlink]);

  return (
    <>
      <Button
        onClick={handleLaunch}
        isLoading={loading}
        loadingText="正在跳转..."
        colorScheme="green"
        leftIcon={<Icon as={ExternalLink} />}
        style={buttonStyle}
        {...buttonProps}
      >
        {children || '打开小程序'}
      </Button>

      {/* 引导弹窗 */}
      <Modal isOpen={isOpen} onClose={onClose} isCentered size="sm">
        <ModalOverlay />
        <ModalContent mx={4}>
          <ModalHeader>打开小程序</ModalHeader>
          <ModalCloseButton />
          <ModalBody>
            <VStack spacing={4} align="stretch">
              <Text color="gray.600" fontSize="sm">
                {isIOS
                  ? '如果没有自动跳转，请点击下方按钮重试'
                  : '请在弹出的对话框中选择"打开微信"'}
              </Text>

              <Box
                p={3}
                bg="gray.50"
                borderRadius="md"
                fontSize="xs"
                color="gray.500"
              >
                <Text fontWeight="medium" mb={1}>提示：</Text>
                <Text>1. 确保已安装微信</Text>
                <Text>2. 点击"打开微信"按钮</Text>
                <Text>3. 如果没有反应，请复制链接到微信打开</Text>
              </Box>
            </VStack>
          </ModalBody>
          <ModalFooter>
            <VStack spacing={2} width="100%">
              <Button
                colorScheme="green"
                width="100%"
                onClick={handleRetry}
                leftIcon={<Icon as={ExternalLink} />}
              >
                打开微信
              </Button>
              <Button
                variant="outline"
                width="100%"
                onClick={handleCopy}
                leftIcon={<Icon as={copied ? Check : Copy} />}
              >
                {copied ? '已复制' : '复制链接'}
              </Button>
            </VStack>
          </ModalFooter>
        </ModalContent>
      </Modal>
    </>
  );
};

export default UrlSchemeLauncher;