Date Field

final dateString = useState("");
final errorMessage = useState<String?>(null);

NeoDateField(
  dateString: dateString.value,
  label: "Birth Date",
  errorText: errorMessage.value,
  onSubmitted: (value) {
    dateString.value = value;
    try {
      // Validate the date string
      final date = NeoDateValidator.validate(value);
      
      // Check if the date is not in the future
      NeoDateValidator.validateIsNotFuture(date);
      
      // Date is valid
      errorMessage.value = null;
      print("Valid birth date: ${NeoDateValidator.format(date)}");
      
    } on FormatException catch (e) {
      errorMessage.value = e.message;
    } on ArgumentError catch (e) {
      errorMessage.value = e.message;
    }
  },
),

final dateString = useState("");
final errorMessage = useState<String?>(null);

String? validateAge(String dateString) {
  try {
    final date = NeoDateValidator.validate(dateString);
    NeoDateValidator.validateIsNotFuture(date);
    
    // Custom rule: Must be at least 18 years old
    final eighteenYearsAgo = DateTime.now().subtract(Duration(days: 365 * 18));
    if (date.isAfter(eighteenYearsAgo)) {
      return "Must be at least 18 years old";
    }
    
    return null; // Valid
  } on FormatException catch (e) {
    return e.message;
  } on ArgumentError catch (_) {
    return "Birth date cannot be in the future";
  }
}

NeoDateField(
  dateString: dateString.value,
  label: "Birth Date",
  errorText: errorMessage.value,
  onSubmitted: (value) {
    dateString.value = value;
    errorMessage.value = validateAge(value);
  },
),

NeoDateField(
  dateString: dateString.value, // Using hooks
  label: "Date",
  errorText: "This field is required",
  onSubmitted: (value) {
    dateString.value = value;
  },
),

NeoDateField(
  dateString: dateString.value, // Using hooks
  label: "Date",
  description: "Select your preferred date",
  isEnabled: false,
  onSubmitted: (value) {
    // Won't be called when disabled
  },
),