/*Copyright (c) 2015 Airbnb

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

2020.03.05-Changed package name 
2020.03.05-Changed components which are belongs to Google replaced with Huawei
Huawei Technologies Co., Ltd.
*/

package com.el173.map;

import android.content.Context;


import com.huawei.hms.maps.HuaweiMap;
import com.huawei.hms.maps.model.Tile;
import com.huawei.hms.maps.model.TileOverlay;
import com.huawei.hms.maps.model.TileOverlayOptions;
import com.huawei.hms.maps.model.TileProvider;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

public class AirMapLocalTile extends AirMapFeature {

    class AIRMapLocalTileProvider implements TileProvider {
        private static final int BUFFER_SIZE = 16 * 1024;
        private int tileSize;
        private String pathTemplate;


        public AIRMapLocalTileProvider(int tileSizet, String pathTemplate) {
            this.tileSize = tileSizet;
            this.pathTemplate = pathTemplate;
        }

        @Override
        public Tile getTile(int x, int y, int zoom) {
            byte[] image = readTileImage(x, y, zoom);
            return image == null ? TileProvider.NO_TILE : new Tile(this.tileSize, this.tileSize, image);
        }

        public void setPathTemplate(String pathTemplate) {
            this.pathTemplate = pathTemplate;
        }

        public void setTileSize(int tileSize) {
            this.tileSize = tileSize;
        }

        private byte[] readTileImage(int x, int y, int zoom) {
            InputStream in = null;
            ByteArrayOutputStream buffer = null;
            File file = new File(getTileFilename(x, y, zoom));

            try {
                in = new FileInputStream(file);
                buffer = new ByteArrayOutputStream();

                int nRead;
                byte[] data = new byte[BUFFER_SIZE];

                while ((nRead = in.read(data, 0, BUFFER_SIZE)) != -1) {
                    buffer.write(data, 0, nRead);
                }
                buffer.flush();

                return buffer.toByteArray();
            } catch (IOException e) {
                e.printStackTrace();
                return null;
            } catch (OutOfMemoryError e) {
                e.printStackTrace();
                return null;
            } finally {
                if (in != null) try { in.close(); } catch (Exception ignored) {}
                if (buffer != null) try { buffer.close(); } catch (Exception ignored) {}
            }
        }

        private String getTileFilename(int x, int y, int zoom) {
            String s = this.pathTemplate
                    .replace("{x}", Integer.toString(x))
                    .replace("{y}", Integer.toString(y))
                    .replace("{z}", Integer.toString(zoom));
            return s;
        }
    }

    private TileOverlayOptions tileOverlayOptions;
    private TileOverlay tileOverlay;
    private AirMapLocalTile.AIRMapLocalTileProvider tileProvider;

    private String pathTemplate;
    private float tileSize;
    private float zIndex;

    public AirMapLocalTile(Context context) {
        super(context);
    }

    public void setPathTemplate(String pathTemplate) {
        this.pathTemplate = pathTemplate;
        if (tileProvider != null) {
            tileProvider.setPathTemplate(pathTemplate);
        }
        if (tileOverlay != null) {
            tileOverlay.clearTileCache();
        }
    }

    public void setZIndex(float zIndex) {
        this.zIndex = zIndex;
        if (tileOverlay != null) {
            tileOverlay.setZIndex(zIndex);
        }
    }

    public void setTileSize(float tileSize) {
        this.tileSize = tileSize;
        if (tileProvider != null) {
            tileProvider.setTileSize((int)tileSize);
        }
    }

    public TileOverlayOptions getTileOverlayOptions() {
        if (tileOverlayOptions == null) {
            tileOverlayOptions = createTileOverlayOptions();
        }
        return tileOverlayOptions;
    }

    private TileOverlayOptions createTileOverlayOptions() {
        TileOverlayOptions options = new TileOverlayOptions();
        options.zIndex(zIndex);
        this.tileProvider = new AirMapLocalTile.AIRMapLocalTileProvider((int)this.tileSize, this.pathTemplate);
        options.tileProvider(this.tileProvider);
        return options;
    }

    @Override
    public Object getFeature() {
        return tileOverlay;
    }

    @Override
    public void addToMap(HuaweiMap map) {
        this.tileOverlay = map.addTileOverlay(getTileOverlayOptions());
    }

    @Override
    public void removeFromMap(HuaweiMap map) {
        tileOverlay.remove();
    }
}