/*
 * Copyright 2013 Hannes Janetzek
 * Copyright 2016-2017 Longri
 * Copyright 2019 Gustl22
 *
 * This file is part of the OpenScienceMap project (http://www.opensciencemap.org).
 *
 * This program is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.oscim.ios.test;

import com.badlogic.gdx.graphics.glutils.GLVersion;

import org.oscim.backend.GLAdapter;
import org.oscim.backend.canvas.Color;
import org.oscim.core.GeoPoint;
import org.oscim.core.MapPosition;
import org.oscim.event.Event;
import org.oscim.gdx.GdxAssets;
import org.oscim.gdx.GdxMap;
import org.oscim.ios.backend.IosGL;
import org.oscim.ios.backend.IosGL30;
import org.oscim.ios.backend.IosGraphics;
import org.oscim.layers.tile.buildings.BuildingLayer;
import org.oscim.layers.tile.vector.VectorTileLayer;
import org.oscim.layers.tile.vector.labeling.LabelLayer;
import org.oscim.layers.vector.PathLayer;
import org.oscim.layers.vector.geometries.Style;
import org.oscim.map.Map;
import org.oscim.renderer.bucket.TextureItem;
import org.oscim.theme.VtmThemes;
import org.oscim.tiling.source.oscimap4.OSciMap4TileSource;
import org.oscim.utils.Utils;

import java.util.ArrayList;
import java.util.List;

public class IOSPathLayerTest extends GdxMap {

    public static void init() {
        // init globals
        IosGraphics.init();
        GdxAssets.init("assets/");
    }

    private static final boolean ANIMATION = false;

    private List<PathLayer> mPathLayers = new ArrayList<>();
    private TextureItem tex;

    @Override
    protected void initGLAdapter(GLVersion version) {
        if (version.getMajorVersion() >= 3)
            GLAdapter.init(new IosGL30());
        else
            GLAdapter.init(new IosGL());
    }

    @Override
    public void createLayers() {
        VectorTileLayer l = mMap.setBaseMap(new OSciMap4TileSource());
        mMap.layers().add(new BuildingLayer(mMap, l));
        mMap.layers().add(new LabelLayer(mMap, l));
        mMap.setTheme(VtmThemes.DEFAULT);

        mMap.setMapPosition(0, 0, 1 << 2);

        tex = Utils.loadTexture("", "patterns/pike.png", 0, 0, 100);
//        tex = new TextureItem(CanvasAdapter.getBitmapAsset("", "patterns/pike.png"));
        tex.mipmap = true;

        createLayers(1, true);

        if (ANIMATION)
            mMap.events.bind(new Map.UpdateListener() {
                @Override
                public void onMapEvent(Event e, MapPosition mapPosition) {
                    //if (e == Map.UPDATE_EVENT) {
                    long t = System.currentTimeMillis();
                    float pos = t % 20000 / 10000f - 1f;
                    createLayers(pos, false);
                    mMap.updateMap(true);
                    //}
                }
            });
    }

    void createLayers(float pos, boolean init) {

        int i = 0;

        for (double lat = -90; lat <= 90; lat += 5) {
            List<GeoPoint> pts = new ArrayList<>();

            for (double lon = -180; lon <= 180; lon += 2) {
                double longitude = lon;

                double latitude = lat + (pos * 90);
                if (latitude < -90)
                    latitude += 180;
                if (latitude > 90)
                    latitude -= 180;

                latitude += Math.sin((Math.abs(pos) * (lon / Math.PI)));

                pts.add(new GeoPoint(latitude, longitude));
            }
            PathLayer pathLayer;
            if (init) {
                int c = Color.fade(Color.rainbow((float) (lat + 90) / 180), 0.5f);
                Style style = Style.builder()
                        .stippleColor(c)
                        .stipple(24)
                        .stippleWidth(1)
                        .strokeWidth(12)
                        .strokeColor(c)
                        .fixed(true)
                        .texture(tex)
                        .randomOffset(false)
                        .build();
                pathLayer = new PathLayer(mMap, style);
                mMap.layers().add(pathLayer);
                mPathLayers.add(pathLayer);
            } else {
                pathLayer = mPathLayers.get(i++);
            }

            pathLayer.setPoints(pts);
        }

    }
}
