import React, { useState, useEffect } from 'react';
import { View, Text } from '@tarojs/components';
import { Button, Loading, Card } from '@nutui/nutui-react-taro';
import { Success, Failure, Tips, User } from '@nutui/icons-react-taro';
import Taro, { useRouter } from '@tarojs/taro';
import { confirmQRLogin } from '@/api/qr-login';
import { useUser } from '@/hooks/useUser';

/**
 * 扫码登录确认页面
 * 用于处理从二维码跳转过来的登录确认
 */
const QRConfirmPage: React.FC = () => {
  const router = useRouter();
  const { user, getDisplayName } = useUser();
  const [loading, setLoading] = useState(false);
  const [confirmed, setConfirmed] = useState(false);
  const [error, setError] = useState<string>('');
  const [token, setToken] = useState<string>('');

  useEffect(() => {
    // 从URL参数中获取token
    const { qrCodeKey, token: urlToken } = router.params;
    const loginToken = qrCodeKey || urlToken;

    if (loginToken) {
      setToken(loginToken);
    } else {
      setError('无效的登录链接');
    }
  }, [router.params]);

  // 确认登录
  const handleConfirmLogin = async () => {
    if (!token) {
      setError('缺少登录token');
      return;
    }

    if (!user?.userId) {
      setError('请先登录小程序');
      return;
    }

    try {
      setLoading(true);
      setError('');

      const result = await confirmQRLogin({
        token,
        userId: user.userId,
        platform: 'wechat',
        wechatInfo: {
          nickname: user.nickname,
          avatar: user.avatar
        }
      });

      if (result.success) {
        setConfirmed(true);
        Taro.showToast({
          title: '登录确认成功',
          icon: 'success',
          duration: 2000
        });

        // 3秒后自动返回
        setTimeout(() => {
          Taro.navigateBack();
        }, 3000);
      } else {
        setError(result.message || '登录确认失败');
      }
    } catch (err: any) {
      setError(err.message || '登录确认失败');
    } finally {
      setLoading(false);
    }
  };

  // 取消登录
  const handleCancel = () => {
    Taro.navigateBack();
  };

  // 重试
  const handleRetry = () => {
    setError('');
    setConfirmed(false);
    handleConfirmLogin();
  };

  return (
    <View className="qr-confirm-page min-h-screen bg-gray-50">
      <View className="p-4">
        {/* 主要内容卡片 */}
        <Card className="bg-white rounded-lg shadow-sm">
          <View className="p-6 text-center">
            {/* 图标 */}
            <View className="mb-6">
              {loading ? (
                <View className="w-16 h-16 mx-auto flex items-center justify-center">
                  <Loading className="text-blue-500" />
                </View>
              ) : confirmed ? (
                <View className="w-16 h-16 mx-auto bg-green-100 rounded-full flex items-center justify-center">
                  <Success className="text-green-500" />
                </View>
              ) : error ? (
                <View className="w-16 h-16 mx-auto bg-red-100 rounded-full flex items-center justify-center">
                  <Failure className="text-red-500" />
                </View>
              ) : (
                <View className="w-16 h-16 mx-auto bg-blue-100 rounded-full flex items-center justify-center">
                  <User size="32" className="text-blue-500" />
                </View>
              )}
            </View>

            {/* 标题 */}
            <Text className="text-xl font-bold text-gray-800 mb-2 block">
              {loading ? '正在确认登录...' :
               confirmed ? '登录确认成功' :
               error ? '登录确认失败' : '确认登录'}
            </Text>

            {/* 描述 */}
            <Text className="text-gray-600 mb-6 block">
              {loading ? '请稍候，正在为您确认登录' :
               confirmed ? '您已成功确认登录，网页端将自动登录' :
               error ? error :
               `确认使用 ${getDisplayName()} 登录网页端？`}
            </Text>

            {/* 用户信息 */}
            {!loading && !confirmed && !error && user && (
              <View className="bg-gray-50 rounded-lg p-4 mb-6">
                <View className="flex items-center justify-center">
                  <View className="w-12 h-12 bg-blue-100 rounded-full flex items-center justify-center mr-3">
                    <User className="text-blue-500" size="20" />
                  </View>
                  <View className="text-left">
                    <Text className="text-sm font-medium text-gray-800 block">
                      {user.nickname || user.username || '用户'}
                    </Text>
                    <Text className="text-xs text-gray-500 block">
                      ID: {user.userId}
                    </Text>
                  </View>
                </View>
              </View>
            )}

            {/* 操作按钮 */}
            <View className="space-y-3">
              {loading ? (
                <Button
                  type="default"
                  size="large"
                  disabled
                  className="w-full"
                >
                  确认中...
                </Button>
              ) : confirmed ? (
                <Button
                  type="success"
                  size="large"
                  onClick={handleCancel}
                  className="w-full"
                >
                  完成
                </Button>
              ) : error ? (
                <View className="space-y-2">
                  <Button
                    type="primary"
                    size="large"
                    onClick={handleRetry}
                    className="w-full"
                  >
                    重试
                  </Button>
                  <Button
                    type="default"
                    size="large"
                    onClick={handleCancel}
                    className="w-full"
                  >
                    取消
                  </Button>
                </View>
              ) : (
                <View className="space-y-2">
                  <Button
                    type="primary"
                    size="large"
                    onClick={handleConfirmLogin}
                    className="w-full"
                    disabled={!token || !user?.userId}
                  >
                    确认登录
                  </Button>
                  <Button
                    type="default"
                    size="large"
                    onClick={handleCancel}
                    className="w-full"
                  >
                    取消
                  </Button>
                </View>
              )}
            </View>
          </View>
        </Card>

        {/* 安全提示 */}
        <Card className="bg-yellow-50 border border-yellow-200 rounded-lg mt-4">
          <View className="p-4">
            <View className="flex items-start">
              <Tips className="text-yellow-600 mr-2 mt-1" size="16" />
              <View>
                <Text className="text-sm font-medium text-yellow-800 mb-1 block">
                  安全提示
                </Text>
                <Text className="text-xs text-yellow-700 block">
                  请确认这是您本人的登录操作。如果不是，请点击取消并检查账户安全。
                </Text>
              </View>
            </View>
          </View>
        </Card>
      </View>
    </View>
  );
};

export default QRConfirmPage;
