import 'package:flutter_bloc/flutter_bloc.dart';
import '../../data/models/teacher_models.dart';
import '../../data/repositories/teacher_repository.dart';

/**
 * ==============================================================================
 * SAQEL TEACHER STUDIO - ASSIGNMENTS & Q&A CUBIT
 * ==============================================================================
 * 
 * إدارة الواجبات المدرسية وأوراق العمل وغرفة تساؤلات الطلبة:
 * - توليد وإسناد أوراق عمل مؤتمتة التصحيح بنقرة واحدة
 * - تسجيل الردود الصوتية السقراطية (Socratic Voice Replies 🎙️)
 * - تحديث فوري لحالات الشكوك والتساؤلات.
 */

class TeacherQnAState {
  final List<TeacherHomeworkModel> homeworks;
  final List<StudentDoubtModel> doubts;
  final bool isLoading;

  const TeacherQnAState({
    required this.homeworks,
    required this.doubts,
    required this.isLoading,
  });

  TeacherQnAState copyWith({
    List<TeacherHomeworkModel>? homeworks,
    List<StudentDoubtModel>? doubts,
    bool? isLoading,
  }) {
    return TeacherQnAState(
      homeworks: homeworks ?? this.homeworks,
      doubts: doubts ?? this.doubts,
      isLoading: isLoading ?? this.isLoading,
    );
  }
}

class TeacherQnACubit extends Cubit<TeacherQnAState> {
  final TeacherRepository repository;

  TeacherQnACubit({required this.repository})
      : super(const TeacherQnAState(
          homeworks: [],
          doubts: [],
          isLoading: false,
        ));

  Future<void> loadQnA() async {
    emit(state.copyWith(isLoading: true));
    final hwList = await repository.getHomeworks();
    final doubtsList = await repository.getStudentDoubts();
    emit(state.copyWith(
      homeworks: hwList,
      doubts: doubtsList,
      isLoading: false,
    ));
  }

  void dispatchNewHomework({
    required String title,
    required String className,
    required String dueDate,
  }) {
    final newHw = TeacherHomeworkModel(
      id: 'hw-${DateTime.now().millisecondsSinceEpoch}',
      title: title,
      className: className,
      submitted: '0 من 83 طالباً',
      dueDate: dueDate,
      averageScore: 'بانتظار الإجابات',
      status: 'active',
    );

    final updated = List<TeacherHomeworkModel>.from(state.homeworks)..insert(0, newHw);
    emit(state.copyWith(homeworks: updated));
  }

  void recordVoiceReply(String doubtId) {
    final updated = state.doubts.map((doubt) {
      if (doubt.id == doubtId) {
        return doubt.copyWith(replied: true, voiceReply: true);
      }
      return doubt;
    }).toList();

    emit(state.copyWith(doubts: updated));
  }
}