/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.springframework.boot.samples.websocket.snake;

import java.awt.Color;
import java.util.Random;

public class SnakeUtils {

    public static final int PLAYFIELD_WIDTH = 640;
    public static final int PLAYFIELD_HEIGHT = 480;
    public static final int GRID_SIZE = 10;

    private static final Random random = new Random();


    public static String getRandomHexColor() {
        float hue = random.nextFloat();
        // sat between 0.1 and 0.3
        float saturation = (random.nextInt(2000) + 1000) / 10000f;
        float luminance = 0.9f;
        Color color = Color.getHSBColor(hue, saturation, luminance);
        return '#' + Integer.toHexString(
                (color.getRGB() & 0xffffff) | 0x1000000).substring(1);
    }


    public static Location getRandomLocation() {
        int x = roundByGridSize(random.nextInt(PLAYFIELD_WIDTH));
        int y = roundByGridSize(random.nextInt(PLAYFIELD_HEIGHT));
        return new Location(x, y);
    }


    private static int roundByGridSize(int value) {
        value = value + (GRID_SIZE / 2);
        value = value / GRID_SIZE;
        value = value * GRID_SIZE;
        return value;
    }

}
