import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import '../services/auth_service.dart';
import '../services/github_service.dart';
import '../models/github_event.dart';
import 'package:timeago/timeago.dart' as timeago;

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

  @override
  State<GithubCard> createState() => _GithubCardState();
}

class _GithubCardState extends State<GithubCard> {
  final GithubService _githubService = GithubService();
  List<GithubEvent> _events = [];
  bool _isLoading = false;
  String? _error;

  String _getEventTypeText(String type) {
    switch (type) {
      case 'PushEvent':
        return '推送代码';
      case 'CreateEvent':
        return '创建仓库';
      case 'IssuesEvent':
        return 'Issue 操作';
      case 'PullRequestEvent':
        return 'Pull Request 操作';
      case 'ForkEvent':
        return 'Fork 仓库';
      case 'WatchEvent':
        return '关注仓库';
      case 'StarEvent':
        return 'Star 仓库';
      default:
        return type;
    }
  }

  Widget _buildCommitContent(List<Commit> commits) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children:
          commits.map((commit) {
            return Padding(
              padding: const EdgeInsets.symmetric(vertical: 4.0),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(
                    commit.message,
                    style: const TextStyle(fontWeight: FontWeight.bold),
                  ),
                  Text(
                    '作者: ${commit.author.name} <${commit.author.email}>',
                    style: const TextStyle(fontSize: 12, color: Colors.grey),
                  ),
                ],
              ),
            );
          }).toList(),
    );
  }

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

    try {
      final authService = Provider.of<AuthService>(context, listen: false);
      final username = authService.credentials['github_username'];
      final token = authService.credentials['github_token'];

      if (username == null || token == null) {
        throw Exception('请在设置中配置 GitHub 用户名和 Token');
      }

      final events = await _githubService.getUserEvents(username, token);
      setState(() {
        _events = events;
        _isLoading = false;
      });
    } catch (e) {
      setState(() {
        _error = e.toString();
        _isLoading = false;
      });
    }
  }

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

  @override
  Widget build(BuildContext context) {
    return Card(
      elevation: 4,
      shadowColor: Colors.deepPurple.withOpacity(0.3),
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(16),
        side: BorderSide(color: Colors.deepPurple.withOpacity(0.1)),
      ),
      margin: const EdgeInsets.symmetric(vertical: 8.0),
      child: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                const Text(
                  'GitHub 最近活动',
                  style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
                ),
                IconButton(
                  icon: const Icon(Icons.refresh),
                  onPressed: _isLoading ? null : _fetchEvents,
                ),
              ],
            ),
            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 (_events.isEmpty)
              const Center(
                child: Padding(
                  padding: EdgeInsets.all(16.0),
                  child: Text('暂无活动记录'),
                ),
              )
            else
              Expanded(
                child: ListView.builder(
                  itemCount: _events.length,
                  itemBuilder: (context, index) {
                    final event = _events[index];
                    return Card(
                      margin: const EdgeInsets.symmetric(vertical: 4.0),
                      child: Padding(
                        padding: const EdgeInsets.all(12.0),
                        child: Column(
                          crossAxisAlignment: CrossAxisAlignment.start,
                          children: [
                            Row(
                              children: [
                                CircleAvatar(
                                  backgroundImage: NetworkImage(
                                    event.actor.avatarUrl,
                                  ),
                                ),
                                const SizedBox(width: 8),
                                Text(
                                  event.actor.login,
                                  style: const TextStyle(
                                    fontWeight: FontWeight.bold,
                                  ),
                                ),
                                const SizedBox(width: 8),
                                Text(_getEventTypeText(event.type)),
                              ],
                            ),
                            const SizedBox(height: 8),
                            Text(
                              event.repo.name,
                              style: const TextStyle(
                                color: Colors.blue,
                                fontWeight: FontWeight.bold,
                              ),
                            ),
                            if (event.type == 'PushEvent' &&
                                event.payload.commits != null)
                              Padding(
                                padding: const EdgeInsets.only(top: 8.0),
                                child: _buildCommitContent(
                                  event.payload.commits!,
                                ),
                              ),
                            const SizedBox(height: 8),
                            Text(
                              '时间: ${timeago.format(event.createdAt, locale: 'zh_CN')}',
                              style: const TextStyle(
                                fontSize: 12,
                                color: Colors.grey,
                              ),
                            ),
                          ],
                        ),
                      ),
                    );
                  },
                ),
              ),
          ],
        ),
      ),
    );
  }
}