// lib/services/firefly_api_service.dart

import 'dart:convert';
import 'package:http/http.dart' as http;
import '../models/firefly_account.dart';

class FireflyApiService {
  /// Mengambil daftar akun dari Firefly III API.
  ///
  /// [baseUrl] adalah URL dasar instance Firefly III (e.g., https://firefly.yourdomain.com).
  /// [accessToken] adalah Personal Access Token pengguna.
  /// [type] adalah filter opsional untuk tipe akun (e.g., 'asset', 'revenue').
  static Future<List<FireflyAccount>> fetchAccounts({
    required String baseUrl,
    required String accessToken,
    String? type,
  }) async {
    final uri =
        type != null ? Uri.parse('$baseUrl/api/v1/accounts?type=$type') : Uri.parse('$baseUrl/api/v1/accounts');

    print('DEBUG: Memanggil API untuk mengambil akun. URL: $uri');

    final response = await http.get(
      uri,
      headers: {
        'Authorization': 'Bearer $accessToken',
        'Accept': 'application/json',
      },
    );

    print('DEBUG: Respons API diterima. Status Code: ${response.statusCode}');

    if (response.statusCode == 200) {
      final dynamic responseBody = json.decode(response.body);
      print('DEBUG: Isi respons (data): ${responseBody['data']}');
      
      if (responseBody is Map<String, dynamic> && responseBody.containsKey('data')) {
        final List accountsJson = responseBody['data'] as List;
        print('DEBUG: Jumlah akun ditemukan: ${accountsJson.length}');
        
        final List<FireflyAccount> accounts = accountsJson
            .map((accountJson) => FireflyAccount.fromJson(accountJson))
            .toList();
            
        print('DEBUG: Akun berhasil diparsing. Jumlah akun: ${accounts.length}');
        return accounts;
      } else {
        print('DEBUG: Format respons tidak sesuai harapan. Isi lengkap: $responseBody');
        throw Exception('Format respons API tidak sesuai');
      }
    } else {
      // Handle error - misalnya, lempar exception
      print('Gagal mengambil akun: ${response.statusCode} - ${response.body}');
      throw Exception('Gagal mengambil akun: ${response.statusCode}');
    }
  }

  /// Mengirim transaksi dummy ke Firefly III API.
  ///
  /// [baseUrl] adalah URL dasar instance Firefly III.
  /// [accessToken] adalah Personal Access Token pengguna.
  /// [sourceId] dan [destinationId] adalah ID akun yang valid.
  /// [type] adalah tipe transaksi (default 'deposit').
  static Future<bool> submitDummyTransaction({
    required String baseUrl,
    required String accessToken,
    required String sourceId,
    required String destinationId,
    String type = 'deposit',
    String description = 'Pengeluaran Dummy via Flutter App',
    String date = '2025-08-19', // Gunakan format ISO 8601
    String amount = '50.00',
  }) async {
    final uri = Uri.parse('$baseUrl/api/v1/transactions');
    final payload = jsonEncode({
      "transactions": [
        {
          "type": type,
          "date": date,
          "amount": amount,
          "description": description,
          "source_id": sourceId,
          "destination_id": destinationId,
        }
      ]
    });

    print('DEBUG: Mengirim transaksi. URL: $uri, Payload: $payload');

    final response = await http.post(
      uri,
      headers: {
        'Authorization': 'Bearer $accessToken',
        'Accept': 'application/json',
        'Content-Type': 'application/json',
      },
      body: payload,
    );

    print('DEBUG: Respons API transaksi diterima. Status Code: ${response.statusCode}');

    if (response.statusCode == 200 || response.statusCode == 201) {
      print('Transaksi berhasil dikirim!');
      return true;
    } else {
      print('Gagal mengirim transaksi: ${response.statusCode} - ${response.body}');
      return false;
    }
  }

  /// Menguji koneksi ke Firefly III.
  static Future<bool> testConnection({required String baseUrl}) async {
    try {
      final response = await http.get(Uri.parse('$baseUrl/api/v1/about'));
      return response.statusCode == 200;
    } catch (e) {
      return false;
    }
  }

  /// Menguji autentikasi dengan token.
  static Future<bool> testAuthentication({required String baseUrl, required String accessToken}) async {
    try {
      final response = await http.get(
        Uri.parse('$baseUrl/api/v1/about/user'),
        headers: {
          'Authorization': 'Bearer $accessToken',
          'Accept': 'application/json',
        },
      );
      return response.statusCode == 200;
    } catch (e) {
      return false;
    }
  }
}