import 'dart:convert';
import 'dart:io';
import 'package:dio/dio.dart';
import 'package:flutter/foundation.dart';

class ApiService {
  // Use 10.0.2.2 for Android Emulator, localhost for iOS/Web
  static final String baseUrl = Platform.isAndroid
      ? 'http://10.0.2.2:3000'
      : 'http://localhost:3000';

  final Dio _dio = Dio(
    BaseOptions(
      baseUrl: baseUrl,
      connectTimeout: const Duration(seconds: 10),
      receiveTimeout: const Duration(seconds: 10),
    ),
  );

  // Get Initial Master Data (Groups, Species, Breeds, Diseases)
  Future<Map<String, dynamic>> getInitialData() async {
    try {
      final response = await _dio.get('/common/initial-data');
      return response.data;
    } catch (e) {
      debugPrint('Error fetching initial data: $e');
      rethrow;
    }
  }

  // Register Pet
  Future<Map<String, dynamic>> registerPet({
    required int userId,
    required String name,
    required String species,
    required String breed,
    required String gender,
    required bool isNeutered,
    DateTime? birthDate,
    required bool isDateUnknown,
    double? weight,
    String? registrationNumber,
    File? profileImage,
    List<String>? diseases,
    List<String>? pastDiseases,
    List<String>? healthConcerns,
  }) async {
    try {
      final formData = FormData.fromMap({
        'userId': userId,
        'name': name,
        'species': species,
        'breed': breed,
        'gender': gender, // "남아", "여아", "기타"
        'isNeutered': isNeutered,
        'birthDate': birthDate?.toIso8601String(),
        'isDateUnknown': isDateUnknown,
        'weight': weight,
        'registrationNumber': registrationNumber,
        'diseases': diseases != null ? jsonEncode(diseases) : '[]',
        'pastDiseases': pastDiseases != null ? jsonEncode(pastDiseases) : '[]',
        'healthConcerns': healthConcerns != null
            ? jsonEncode(healthConcerns)
            : '[]',
        if (profileImage != null)
          'profileImage': await MultipartFile.fromFile(
            profileImage.path,
            filename: profileImage.path.split('/').last,
          ),
      });

      final response = await _dio.post('/pets', data: formData);
      return response.data;
    } catch (e) {
      debugPrint('Error registering pet: $e');
      rethrow;
    }
  }

  // Update Pet
  Future<Map<String, dynamic>> updatePet({
    required int petId,
    required String name,
    required String species,
    required String breed,
    required String gender,
    required bool isNeutered,
    DateTime? birthDate,
    required bool isDateUnknown,
    double? weight,
    String? registrationNumber,
    File? profileImage,
    List<String>? diseases,
    List<String>? pastDiseases,
    List<String>? healthConcerns,
  }) async {
    try {
      final formData = FormData.fromMap({
        'name': name,
        'species': species,
        'breed': breed,
        'gender': gender,
        'isNeutered': isNeutered,
        'birthDate': birthDate?.toIso8601String(),
        'isDateUnknown': isDateUnknown,
        'weight': weight,
        'registrationNumber': registrationNumber,
        'diseases': diseases != null ? jsonEncode(diseases) : '[]',
        'pastDiseases': pastDiseases != null ? jsonEncode(pastDiseases) : '[]',
        'healthConcerns': healthConcerns != null
            ? jsonEncode(healthConcerns)
            : '[]',
        if (profileImage != null)
          'profileImage': await MultipartFile.fromFile(
            profileImage.path,
            filename: profileImage.path.split('/').last,
          ),
      });

      final response = await _dio.put('/pets/$petId', data: formData);
      return response.data;
    } catch (e) {
      debugPrint('Error updating pet: $e');
      rethrow;
    }
  }

  // Get Pets
  Future<List<dynamic>> getPets(int userId) async {
    try {
      final response = await _dio.get(
        '/pets',
        queryParameters: {'userId': userId},
      );
      return response.data;
    } catch (e) {
      debugPrint('Error fetching pets: $e');
      rethrow;
    }
  }
}