import 'package:equatable/equatable.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:focusflow_shared/focusflow_shared.dart';

// ── States ─────────────────────────────────────────────────────────

sealed class RewardState extends Equatable {
  const RewardState();
  @override
  List<Object?> get props => [];
}

class RewardIdle extends RewardState {}

class RewardShowing extends RewardState {
  final Reward reward;
  const RewardShowing(this.reward);
  @override
  List<Object?> get props => [reward];
}

class RewardDismissed extends RewardState {}

// ── Cubit ──────────────────────────────────────────────────────────

/// Manages the reward overlay display lifecycle.
///
/// Flow:
///  1. After a task is completed, call [showReward].
///  2. The UI renders [RewardPopup] when state is [RewardShowing].
///  3. User taps dismiss -> call [dismiss].
class RewardCubit extends Cubit<RewardState> {
  RewardCubit() : super(RewardIdle());

  /// Show a reward to the user.
  void showReward(Reward reward) {
    emit(RewardShowing(reward));
  }

  /// Dismiss the current reward and return to idle.
  void dismiss() {
    emit(RewardDismissed());
    // Brief delay then return to idle so the cubit is ready for the next reward.
    Future<void>.delayed(const Duration(milliseconds: 300), () {
      if (!isClosed) emit(RewardIdle());
    });
  }
}