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

class ApiService {
  static const String _baseUrl = 'https://otp.intaleqapp.com/api/';
  static const String _appKey =
      'f3a9e7c1b8d5f2a4c6e9b1d3f5a7c9e1b3d5f7a9c1e3b5d7f9a1c3e5b7d9f1';

  /// Request an OTP to be sent to the given phone number
  /// Returns a map with {success, expires_in, method}
  static Future<Map<String, dynamic>> requestOtp(
    String phone,
    String deviceType,
  ) async {
    try {
      final response = await http
          .post(
            Uri.parse('${_baseUrl}request-otp.php'),
            headers: {'Content-Type': 'application/json'},
            body: jsonEncode({
              'phone': phone,
              'device_type': deviceType,
              'app_key': _appKey,
            }),
          )
          .timeout(const Duration(seconds: 30));

      if (response.statusCode == 200) {
        final data = jsonDecode(response.body) as Map<String, dynamic>;
        return {
          'success': data['success'] ?? false,
          'expires_in': data['expires_in'] ?? 120,
          'method': data['method'] ?? 'flash_call',
        };
      } else {
        final data = jsonDecode(response.body) as Map<String, dynamic>;
        return {
          'success': false,
          'expires_in': 0,
          'method': 'flash_call',
          'message': data['message'] ?? 'Server error: ${response.statusCode}',
        };
      }
    } on http.ClientException catch (e) {
      return {
        'success': false,
        'expires_in': 0,
        'method': 'flash_call',
        'message': 'Network error: ${e.message}',
      };
    } on FormatException {
      return {
        'success': false,
        'expires_in': 0,
        'method': 'flash_call',
        'message': 'Invalid server response',
      };
    } catch (e) {
      return {
        'success': false,
        'expires_in': 0,
        'method': 'flash_call',
        'message': 'Connection error: $e',
      };
    }
  }

  /// Verify an OTP code for the given phone number
  /// Returns a map with {success, message}
  static Future<Map<String, dynamic>> verifyOtp(
    String phone,
    String otp,
  ) async {
    try {
      final response = await http
          .post(
            Uri.parse('${_baseUrl}verify-otp.php'),
            headers: {'Content-Type': 'application/json'},
            body: jsonEncode({'phone': phone, 'otp': otp, 'app_key': _appKey}),
          )
          .timeout(const Duration(seconds: 30));

      if (response.statusCode == 200) {
        final data = jsonDecode(response.body) as Map<String, dynamic>;
        return {
          'success': data['success'] ?? false,
          'message': data['message'] ?? 'Verification completed',
        };
      } else {
        final data = jsonDecode(response.body) as Map<String, dynamic>;
        return {
          'success': false,
          'message': data['message'] ?? 'Server error: ${response.statusCode}',
        };
      }
    } on http.ClientException catch (e) {
      return {'success': false, 'message': 'Network error: ${e.message}'};
    } on FormatException {
      return {'success': false, 'message': 'Invalid server response'};
    } catch (e) {
      return {'success': false, 'message': 'Connection error: $e'};
    }
  }
}