/*
 * Copyright 2019 Hippo Seven
 *
 * 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.hippo.ehviewer.widget;

import android.annotation.SuppressLint;
import android.os.Bundle;
import android.os.Parcelable;

import com.hippo.ehviewer.EhApplication;
import com.hippo.ehviewer.FavouriteStatusRouter;
import com.hippo.ehviewer.client.data.GalleryInfo;
import com.hippo.widget.ContentLayout;
import com.hippo.yorozuya.IntIdGenerator;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

public abstract class GalleryInfoContentHelper extends ContentLayout.ContentHelper<GalleryInfo> {
    public int maxGid = -1;
    public int minGid = -1;

    private static final String KEY_DATA_MAP = "data_map";
    private static final String KEY_MAX_GID = "max_gid";
    private static final String KEY_MIN_GID = "min_gid";

    public static final String KEY_NEXT_PAGE = "next_page";
    private final FavouriteStatusRouter.Listener listener;
    @SuppressLint("UseSparseArrays")
    private Map<Long, GalleryInfo> map = new HashMap<>();

    public GalleryInfoContentHelper() {
        listener = (gid, slot) -> {
            GalleryInfo info = map.get(gid);
            if (info != null) {
                info.favoriteSlot = slot;
            }
        };
        EhApplication.getFavouriteStatusRouter().addListener(listener);
    }

    public void destroy() {
        EhApplication.getFavouriteStatusRouter().removeListener(listener);
    }

    @Override
    protected void onAddData(GalleryInfo data) {
        map.put(data.gid, data);
    }

    @Override
    protected void onAddData(List<GalleryInfo> data) {
        for (GalleryInfo info : data) {
            if (maxGid == -1)
                maxGid = (int) info.gid;
            if (minGid == -1)
                minGid = (int) info.gid;
            maxGid = (int) Math.max(maxGid, info.gid);
            minGid = (int) Math.min(minGid, info.gid);
            map.put(info.gid, info);
        }
    }

    @Override
    protected void onRemoveData(GalleryInfo data) {
        map.remove(data.gid);
    }

    @Override
    protected void onRemoveData(List<GalleryInfo> data) {
        for (GalleryInfo info : data) {
            map.remove(info.gid);
        }
    }

    @Override
    protected void onClearData() {
        map.clear();
        maxGid = -1;
        minGid = -1;
    }

    @Override
    protected Parcelable saveInstanceState(Parcelable superState) {
        Bundle bundle = (Bundle) super.saveInstanceState(superState);

        // TODO It's a bad design
        FavouriteStatusRouter router = EhApplication.getFavouriteStatusRouter();
        int id = router.saveDataMap(map);
        bundle.putInt(KEY_DATA_MAP, id);
        bundle.putInt(KEY_MIN_GID, minGid);
        bundle.putInt(KEY_MAX_GID, maxGid);

        return bundle;
    }

    @Override
    protected Parcelable restoreInstanceState(Parcelable state) {
        Bundle bundle = (Bundle) state;

        int id = bundle.getInt(KEY_DATA_MAP, IntIdGenerator.INVALID_ID);
        if (id != IntIdGenerator.INVALID_ID) {
            FavouriteStatusRouter router = EhApplication.getFavouriteStatusRouter();
            Map<Long, GalleryInfo> map = router.restoreDataMap(id);
            if (map != null) {
                this.map = map;
            }
        }
        minGid = bundle.getInt(KEY_MIN_GID);
        maxGid = bundle.getInt(KEY_MAX_GID);

        return super.restoreInstanceState(state);
    }
}