/*
 *    Copyright (C) 2015 Haruki Hasegawa
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

package com.h6ah4i.android.example.advrecyclerview.demo_d_on_longpress;

import android.graphics.drawable.NinePatchDrawable;
import android.os.Build;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.h6ah4i.android.example.advrecyclerview.R;
import com.h6ah4i.android.example.advrecyclerview.common.data.AbstractDataProvider;
import com.h6ah4i.android.widget.advrecyclerview.animator.DraggableItemAnimator;
import com.h6ah4i.android.widget.advrecyclerview.animator.GeneralItemAnimator;
import com.h6ah4i.android.widget.advrecyclerview.decoration.ItemShadowDecorator;
import com.h6ah4i.android.widget.advrecyclerview.decoration.SimpleListDividerDecorator;
import com.h6ah4i.android.widget.advrecyclerview.draggable.RecyclerViewDragDropManager;
import com.h6ah4i.android.widget.advrecyclerview.utils.WrapperAdapterUtils;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.core.content.ContextCompat;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

public class DragOnLongPressExampleFragment extends Fragment {
    private RecyclerView mRecyclerView;
    private RecyclerView.LayoutManager mLayoutManager;
    private RecyclerView.Adapter mAdapter;
    private RecyclerView.Adapter mWrappedAdapter;
    private RecyclerViewDragDropManager mRecyclerViewDragDropManager;

    public DragOnLongPressExampleFragment() {
        super();
    }

    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_recycler_list_view, container, false);
    }

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        //noinspection ConstantConditions
        mRecyclerView = getView().findViewById(R.id.recycler_view);
        mLayoutManager = new LinearLayoutManager(requireContext());

        // drag & drop manager
        mRecyclerViewDragDropManager = new RecyclerViewDragDropManager();
        mRecyclerViewDragDropManager.setDraggingItemShadowDrawable(
                (NinePatchDrawable) ContextCompat.getDrawable(requireContext(), R.drawable.material_shadow_z3));
        // Start dragging after long press
        mRecyclerViewDragDropManager.setInitiateOnLongPress(true);
        mRecyclerViewDragDropManager.setInitiateOnMove(false);

        //adapter
        final DragOnLongPressExampleAdapter myItemAdapter = new DragOnLongPressExampleAdapter(getDataProvider());
        mAdapter = myItemAdapter;

        mWrappedAdapter = mRecyclerViewDragDropManager.createWrappedAdapter(myItemAdapter);      // wrap for dragging

        final GeneralItemAnimator animator = new DraggableItemAnimator();

        mRecyclerView.setLayoutManager(mLayoutManager);
        mRecyclerView.setAdapter(mWrappedAdapter);  // requires *wrapped* adapter
        mRecyclerView.setItemAnimator(animator);

        // additional decorations
        //noinspection StatementWithEmptyBody
        if (supportsViewElevation()) {
            // Lollipop or later has native drop shadow feature. ItemShadowDecorator is not required.
        } else {
            mRecyclerView.addItemDecoration(new ItemShadowDecorator((NinePatchDrawable) ContextCompat.getDrawable(requireContext(), R.drawable.material_shadow_z1)));
        }
        mRecyclerView.addItemDecoration(new SimpleListDividerDecorator(ContextCompat.getDrawable(requireContext(), R.drawable.list_divider_h), true));

        mRecyclerViewDragDropManager.attachRecyclerView(mRecyclerView);

        // for debugging
//        animator.setDebug(true);
//        animator.setMoveDuration(2000);
    }

    @Override
    public void onPause() {
        mRecyclerViewDragDropManager.cancelDrag();
        super.onPause();
    }

    @Override
    public void onDestroyView() {
        if (mRecyclerViewDragDropManager != null) {
            mRecyclerViewDragDropManager.release();
            mRecyclerViewDragDropManager = null;
        }

        if (mRecyclerView != null) {
            mRecyclerView.setItemAnimator(null);
            mRecyclerView.setAdapter(null);
            mRecyclerView = null;
        }

        if (mWrappedAdapter != null) {
            WrapperAdapterUtils.releaseAll(mWrappedAdapter);
            mWrappedAdapter = null;
        }
        mAdapter = null;
        mLayoutManager = null;

        super.onDestroyView();
    }

    private boolean supportsViewElevation() {
        return (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP);
    }

    public AbstractDataProvider getDataProvider() {
        return ((DragOnLongPressExampleActivity) getActivity()).getDataProvider();
    }
}
