import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:flux/features/tickets/models/ticket_model.dart';
import 'package:flux/features/tickets/data/ticket_repository.dart';
import 'package:get_it/get_it.dart';
import 'ticket_list_state.dart';

class TicketListCubit extends Cubit<TicketListState> {
  final TicketRepository _repository = GetIt.I.get<TicketRepository>();
  static const int _limit = 20; // Paginazione a blocchi di 20

  TicketListCubit() : super(const TicketListState()) {
    loadTickets(refresh: true);
  }

  /// Recupera i ticket. Se reset = true, svuota la lista e riparte da offset 0.
  Future<void> loadTickets({bool refresh = false}) async {
    if (state.isLoading) return;
    if (!refresh && state.hasReachedMax) return;

    emit(
      state.copyWith(
        isLoading: true,
        errorMessage: '',
        tickets: refresh ? [] : state.tickets,
      ),
    );

    try {
      final currentOffset = refresh ? 0 : state.tickets.length;

      final newTickets = await _repository.fetchStoreTickets(
        offset: currentOffset,
        limit: _limit,
        searchTerm: state.searchTerm,
        dateRange: state.dateRange,
        statusFilter: state.statusFilter,
        ticketTypeFilter: state.ticketTypeFilter,
        staffIdFilter: state.staffIdFilter,
      );

      emit(
        state.copyWith(
          tickets: refresh ? newTickets : [...state.tickets, ...newTickets],
          isLoading: false,
          hasReachedMax: newTickets.length < _limit,
        ),
      );
    } catch (e) {
      emit(state.copyWith(isLoading: false, errorMessage: e.toString()));
    }
  }

  /// Aggiorna i filtri e ricarica tutto da zero
  void updateFilters({
    String? searchTerm,
    DateTimeRange? dateRange,
    TicketStatus? statusFilter,
    TicketType? ticketTypeFilter,
    String? staffIdFilter,
    bool clearSearch = false,
    bool clearDate = false,
    bool clearStatus = false,
  }) {
    emit(
      state.copyWith(
        searchTerm: searchTerm,
        dateRange: dateRange,
        statusFilter: statusFilter,
        ticketTypeFilter: ticketTypeFilter,
        staffIdFilter: staffIdFilter,
        clearSearch: clearSearch,
        clearDate: clearDate,
        clearStatus: clearStatus,
      ),
    );
    loadTickets(refresh: true); // Applica i filtri e ricarica
  }

  void toggleTicketSelection(String ticketId) {
    final currentSelection = Set<String>.from(state.selectedTicketIds);
    if (currentSelection.contains(ticketId)) {
      currentSelection.remove(ticketId);
    } else {
      currentSelection.add(ticketId);
    }
    emit(state.copyWith(selectedTicketIds: currentSelection));
  }

  void clearSelection() {
    emit(state.copyWith(selectedTicketIds: {}));
  }

  void selectAll(List<String> ticketIds) {
    emit(state.copyWith(selectedTicketIds: ticketIds.toSet()));
  }
}