import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:http/http.dart' as http;
import 'dart:convert';
import '../services/auth_service.dart';

class LeetCodeCard extends StatefulWidget {
  const LeetCodeCard({super.key});

  @override
  State<LeetCodeCard> createState() => _LeetCodeCardState();
}

class _LeetCodeCardState extends State<LeetCodeCard> {
  List<dynamic> _submissions = [];
  bool _isLoading = false;
  String? _error;

  Future<void> _fetchSubmissions() async {
    setState(() {
      _isLoading = true;
      _error = null;
    });

    try {
      final authService = Provider.of<AuthService>(context, listen: false);
      final cookie = authService.credentials['leetcode'];

      if (cookie == null || cookie.isEmpty) {
        throw Exception('未配置 LeetCode Cookie');
      }

      final response = await http.post(
        Uri.parse('https://leetcode.cn/graphql/noj-go/'),
        headers: {'Content-Type': 'application/json', 'Cookie': cookie},
        body: jsonEncode({
          'query': '''
            query recentAcSubmissions(\$userSlug: String!) {
              recentACSubmissions(userSlug: \$userSlug) {
                submissionId
                submitTime
                question {
                  title
                  translatedTitle
                  titleSlug
                  questionFrontendId
                }
              }
            }
          ''',
          'variables': {'userSlug': 'keen-wilsonv9s'},
          'operationName': 'recentAcSubmissions',
        }),
      );

      if (response.statusCode == 200) {
        final data = jsonDecode(response.body);
        setState(() {
          _submissions = data['data']['recentACSubmissions'];
          _isLoading = false;
        });
      } else {
        throw Exception('请求失败: ${response.statusCode}');
      }
    } catch (e) {
      setState(() {
        _error = e.toString();
        _isLoading = false;
      });
    }
  }

  @override
  void initState() {
    super.initState();
    _fetchSubmissions();
  }

  @override
  Widget build(BuildContext context) {
    return Card(
      child: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                const Text(
                  'LeetCode 最近提交',
                  style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
                ),
                IconButton(
                  icon: const Icon(Icons.refresh),
                  onPressed: _isLoading ? null : _fetchSubmissions,
                ),
              ],
            ),
            if (_isLoading)
              const Center(
                child: Padding(
                  padding: EdgeInsets.all(16.0),
                  child: CircularProgressIndicator(),
                ),
              )
            else if (_error != null)
              Center(
                child: Padding(
                  padding: const EdgeInsets.all(16.0),
                  child: Text(
                    _error!,
                    style: const TextStyle(color: Colors.red),
                  ),
                ),
              )
            else if (_submissions.isEmpty)
              const Center(
                child: Padding(
                  padding: EdgeInsets.all(16.0),
                  child: Text('暂无提交记录'),
                ),
              )
            else
              Expanded(
                child: ListView.builder(
                  itemCount: _submissions.length,
                  itemBuilder: (context, index) {
                    final submission = _submissions[index];
                    final question = submission['question'];
                    final submitTime = DateTime.fromMillisecondsSinceEpoch(
                      submission['submitTime'] * 1000,
                    );

                    return ListTile(
                      title: Text(
                        question['translatedTitle'] ?? question['title'],
                      ),
                      subtitle: Text(
                        '提交时间: ${submitTime.toString().substring(0, 19)}',
                      ),
                      trailing: Text('#${question['questionFrontendId']}'),
                    );
                  },
                ),
              ),
          ],
        ),
      ),
    );
  }
}