import 'package:equatable/equatable.dart';
import 'package:finlytic_app/features/news/models/news_article_model.dart';

abstract class NewsState extends Equatable {
  const NewsState();

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

class NewsInitial extends NewsState {}

class NewsLoading extends NewsState {}

class NewsLoaded extends NewsState {
  final List<NewsArticleModel> articles;
  final bool hasReachedMax;
  final int currentPage;
  
  // Filter state preservation
  final String? symbol;
  final String? isin;
  final String? date;

  const NewsLoaded({
    required this.articles,
    this.hasReachedMax = false,
    this.currentPage = 1,
    this.symbol,
    this.isin,
    this.date,
  });

  NewsLoaded copyWith({
    List<NewsArticleModel>? articles,
    bool? hasReachedMax,
    int? currentPage,
    String? symbol,
    String? isin,
    String? date,
  }) {
    return NewsLoaded(
      articles: articles ?? this.articles,
      hasReachedMax: hasReachedMax ?? this.hasReachedMax,
      currentPage: currentPage ?? this.currentPage,
      symbol: symbol ?? this.symbol,
      isin: isin ?? this.isin,
      date: date ?? this.date,
    );
  }

  @override
  List<Object?> get props => [articles, hasReachedMax, currentPage, symbol, isin, date];
}

class NewsError extends NewsState {
  final String message;

  const NewsError(this.message);

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