import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'package:shared_preferences/shared_preferences.dart';
import '../../globals.dart';

class AddFriendPage extends StatefulWidget {
  @override
  _AddFriendPageState createState() => _AddFriendPageState();
}

class _AddFriendPageState extends State<AddFriendPage> {
  final TextEditingController _friendUidController = TextEditingController();
  List<dynamic> _friends = [];
  bool _isLoading = false;

  final String _addFriendApiUrl = '$apiurl/add_friend';
  final String _getFriendsApiUrl = '$apiurl/get_friends';

  // Method to add a friend
  Future<void> _addFriend(String friendUid) async {
    final prefs = await SharedPreferences.getInstance();
    final String? token = prefs.getString('token');

    if (token == null) {
      _showToast('No token found. Please login again.');
      return;
    }

    final response = await http.post(
      Uri.parse(_addFriendApiUrl),
      headers: {'Content-Type': 'application/json'},
      body: json.encode({
        'token': token,
        'friend_uid': friendUid,
      }),
    );

    if (response.statusCode == 200) {
      _showToast('Friend added successfully!');
      _fetchFriends();
    } else {
      _showToast('Failed to add friend.');
    }
  }

  Future<void> _fetchFriends() async {
    setState(() {
      _isLoading = true;
    });

    final prefs = await SharedPreferences.getInstance();
    final String? token = prefs.getString('token');

    if (token == null) {
      _showToast('No token found. Please login again.');
      setState(() {
        _isLoading = false;
      });
      return;
    }

    final response = await http.post(
      Uri.parse(_getFriendsApiUrl),
      headers: {'Content-Type': 'application/json'},
      body: json.encode({'token': token}),
    );

    if (response.statusCode == 200) {
      final data = json.decode(response.body);
      setState(() {
        _friends = data['friends'];
        _isLoading = false;
      });
    } else {
      _showToast('Failed to load friends.');
      setState(() {
        _isLoading = false;
      });
    }
  }

  void _showToast(String message) {
    ScaffoldMessenger.of(context).showSnackBar(
      SnackBar(content: Text(message)),
    );
  }

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            TextField(
              controller: _friendUidController,
              decoration: InputDecoration(
                labelText: 'Enter Friend UID',
                border: OutlineInputBorder(),
              ),
            ),
            SizedBox(height: 16),
            // Add Friend Button
            ElevatedButton(
              onPressed: () {
                final friendUid = _friendUidController.text;
                if (friendUid.isNotEmpty) {
                  _addFriend(friendUid);
                } else {
                  _showToast('Please enter a friend UID.');
                }
              },
              child: Text('Add Friend'),
            ),
            SizedBox(height: 16),
            // Friends List (scrollable)
            _isLoading
                ? Center(child: CircularProgressIndicator())
                : Expanded(
                    child: ListView.builder(
                      itemCount: _friends.length,
                      itemBuilder: (context, index) {
                        final friend = _friends[index];
                        return ListTile(
                          title: Text(friend['name']),
                          subtitle: Text('UID: ${friend['uid']}'),
                        );
                      },
                    ),
                  ),
          ],
        ),
      ),
    );
  }
}