import 'dart:io';
import 'package:dio/dio.dart';
import 'package:social_app/core/api/i_api_client.dart';
import 'models/user_response.dart';

class UserBasicInfo {
  final String id;
  final String username;
  final String? avatarUrl;

  UserBasicInfo({required this.id, required this.username, this.avatarUrl});

  factory UserBasicInfo.fromJson(Map<String, dynamic> json) {
    return UserBasicInfo(
      id: json['id'] as String,
      username: json['username'] as String,
      avatarUrl: json['avatar_url'] as String?,
    );
  }
}

class UsersApi {
  final IApiClient _client;
  static const _prefix = '/api/v1/users';

  UsersApi(this._client);

  Future<UserBasicInfo> getById(String userId) async {
    final response = await _client.get('$_prefix/$userId');
    return UserBasicInfo.fromJson(response.data);
  }

  Future<UserResponse> getMe() async {
    final response = await _client.get('$_prefix/me');
    return UserResponse.fromJson(response.data);
  }

  Future<UserResponse> updateMe(UserUpdateRequest request) async {
    final response = await _client.patch('$_prefix/me', data: request.toJson());
    return UserResponse.fromJson(response.data);
  }

  Future<String> uploadAvatar(File file) async {
    final formData = FormData.fromMap({
      'file': await MultipartFile.fromFile(
        file.path,
        filename: file.path.split('/').last,
      ),
    });
    final response = await _client.post<Map<String, dynamic>>(
      '$_prefix/me/avatar',
      data: formData,
    );
    final payload = response.data;
    if (payload is! Map<String, dynamic>) {
      throw StateError('Invalid /users/me/avatar response');
    }
    final url = payload['url'];
    if (url is! String) {
      throw StateError('Missing url in /users/me/avatar response');
    }
    return url;
  }

  Future<List<UserResponse>> searchUsers(String query) async {
    final response = await _client.post(
      '$_prefix/search',
      data: {'query': query},
    );
    final List<dynamic> data = response.data;
    return data.map((json) => UserResponse.fromJson(json)).toList();
  }
}