import 'package:equatable/equatable.dart';

abstract class ${upperName}State extends Equatable {
  ${upperName}State(this.version);
 
  /// notify change state without deep clone state
  final int version;

  /// Copy object for use in action
  /// if need use deep clone
  ${upperName}State getStateCopy();

  ${upperName}State getNewVersion();

  @override
  List<Object> get props => [version];
}

/// UnInitialized
class Un${upperName}State extends ${upperName}State {

  Un${upperName}State(int version) : super(version);

  @override
  String toString() => 'Un${upperName}State';

  @override
  Un${upperName}State getStateCopy() {
    return Un${upperName}State(0);
  }

  @override
  Un${upperName}State getNewVersion() {
    return Un${upperName}State(version+1);
  }
}

/// Initialized
class In${upperName}State extends ${upperName}State {
  
  In${upperName}State(int version, this.hello) : super(version);
 
  final String hello;

  @override
  String toString() => 'In${upperName}State $hello';

  @override
  In${upperName}State getStateCopy() {
    return In${upperName}State(version, hello);
  }

  @override
  In${upperName}State getNewVersion() {
    return In${upperName}State(version+1, hello);
  }

  @override
  List<Object> get props => [version, hello];
}

class Error${upperName}State extends ${upperName}State {
  Error${upperName}State(int version, this.errorMessage): super(version);
 
  final String errorMessage;
  
  @override
  String toString() => 'Error${upperName}State';

  @override
  Error${upperName}State getStateCopy() {
    return Error${upperName}State(version, errorMessage);
  }

  @override
  Error${upperName}State getNewVersion() {
    return Error${upperName}State(version+1, 
    errorMessage);
  }

  @override
  List<Object> get props => [version, errorMessage];
}