package it.niedermann.nextcloud.deck.ui.filter;

import static java.util.Objects.requireNonNull;
import static it.niedermann.nextcloud.deck.persistence.sync.adapters.db.util.LiveDataHelper.observeOnce;

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.ViewModelProvider;

import it.niedermann.nextcloud.deck.databinding.DialogFilterLabelsBinding;
import it.niedermann.nextcloud.deck.model.Label;
import it.niedermann.nextcloud.deck.ui.MainViewModel;

public class FilterLabelsFragment extends Fragment implements SelectionListener<Label> {

    private FilterViewModel filterViewModel;

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

        final var binding = DialogFilterLabelsBinding.inflate(requireActivity().getLayoutInflater());
        final var mainViewModel = new ViewModelProvider(requireActivity()).get(MainViewModel.class);

        filterViewModel = new ViewModelProvider(requireActivity()).get(FilterViewModel.class);

        observeOnce(filterViewModel.findProposalsForLabelsToAssign(mainViewModel.getCurrentAccount().getId(), mainViewModel.getCurrentBoardLocalId()), requireActivity(), (labels) -> {
            binding.labels.setNestedScrollingEnabled(false);
            binding.labels.setAdapter(new FilterLabelsAdapter(
                    labels,
                    requireNonNull(filterViewModel.getFilterInformationDraft().getValue()).getLabels(),
                    requireNonNull(filterViewModel.getFilterInformationDraft().getValue()).isNoAssignedLabel(),
                    this));
        });

        return binding.getRoot();
    }

    @Override
    public void onItemSelected(@Nullable Label item) {
        if (item == null) {
            filterViewModel.setNotAssignedLabel(true);
        } else {
            filterViewModel.addFilterInformationDraftLabel(item);
        }
    }

    @Override
    public void onItemDeselected(@Nullable Label item) {
        if (item == null) {
            filterViewModel.setNotAssignedLabel(false);
        } else {
            filterViewModel.removeFilterInformationLabel(item);
        }
    }
}