import 'dart:convert';

import 'package:flutter_secure_storage/flutter_secure_storage.dart';
import 'package:syncrow_app/utils/helpers/decode_base64.dart';

class Token {
  static const String loginAccessTokenKey = 'access_token';
  static const String loginRefreshTokenKey = 'refreshToken';

  final String accessToken;
  final String refreshToken;

  Token.emptyConstructor()
      : accessToken = '',
        refreshToken = '';

  bool get accessTokenIsNotEmpty => accessToken.isNotEmpty;

  bool get refreshTokenIsNotEmpty => refreshToken.isNotEmpty;

  bool get isNotEmpty => accessToken.isNotEmpty && refreshToken.isNotEmpty;

  Token(
    this.accessToken,
    this.refreshToken,
  );

  Token.refreshToken(this.refreshToken) : accessToken = '';

  factory Token.fromJson(Map<String, dynamic> json) {
    //save token to secure storage
    var storage = const FlutterSecureStorage();
    storage.write(
        key: loginAccessTokenKey, value: json[loginAccessTokenKey] ?? '');

    //create token object ?
    return Token(
        json[loginAccessTokenKey] ?? '', json[loginRefreshTokenKey] ?? '');
  }

  Map<String, String> toJson() => {loginRefreshTokenKey: refreshToken};

  Map<String, String> accessTokenToJson() => {loginAccessTokenKey: accessToken};

  Map<String, dynamic> decodeToken() {
    final parts = accessToken.split('.');
    if (parts.length != 3) {
      throw Exception('invalid access token');
    }
    final payload = decodeBase64(parts[1]);
    return json.decode(payload);
  }
}