import 'dart:convert';
import 'package:http/http.dart' as http;
import '../core/constants.dart';
import '../models/member.dart';
import 'auth_service.dart';
import 'member_repository.dart';

export 'member_repository.dart';

class MemberService implements MemberRepository {
  final _auth = AuthService();

  Future<Map<String, String>> _headers() async {
    final token = await _auth.getToken();
    return {
      if (token != null) 'Authorization': 'Bearer $token',
      'Accept': 'application/json',
    };
  }

  Future<Member> _fetch(String url) async {
    final res = await http.get(Uri.parse(url), headers: await _headers());
    if (res.statusCode == 200) {
      return Member.fromJson(jsonDecode(res.body) as Map<String, dynamic>);
    }
    throw Exception('Error ${res.statusCode}');
  }

  @override Future<Member> first() => _fetch('$kApiBase/members/first');
  @override Future<Member> last() => _fetch('$kApiBase/members/last');
  @override Future<Member> show(int id) => _fetch('$kApiBase/members/$id');
  @override Future<Member> prev(int id) => _fetch('$kApiBase/members/$id/prev');
  @override Future<Member> next(int id) => _fetch('$kApiBase/members/$id/next');

  @override
  Future<Map<String, String>> search(String term) async {
    final uri = Uri.parse('$kApiBase/members/search')
        .replace(queryParameters: {'term': term});
    final res = await http.get(uri, headers: await _headers());
    if (res.statusCode == 200) {
      final data = jsonDecode(res.body) as Map<String, dynamic>;
      return data.map((k, v) => MapEntry(k, v.toString()));
    }
    return {};
  }
}