/*
 * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
 * Copyright (C) 2016-2021 ViaVersion and contributors
 *
 * 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.
 */
package com.viaversion.viaversion.util;

import it.unimi.dsi.fastutil.ints.Int2IntMap;
import it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap;

import java.util.regex.Pattern;

// Based on https://github.com/SpigotMC/BungeeCord/blob/master/chat/src/main/java/net/md_5/bungee/api/ChatColor.java
public class ChatColorUtil {

    public static final String ALL_CODES = "0123456789AaBbCcDdEeFfKkLlMmNnOoRrXx";
    public static final char COLOR_CHAR = '§';
    public static final Pattern STRIP_COLOR_PATTERN = Pattern.compile("(?i)" + COLOR_CHAR + "[0-9A-FK-ORX]");
    private static final Int2IntMap COLOR_ORDINALS = new Int2IntOpenHashMap();
    private static int ordinalCounter;

    static {
        addColorOrdinal('0', '9');
        addColorOrdinal('a', 'f');
        addColorOrdinal('k', 'o');
        addColorOrdinal('r');
    }

    public static boolean isColorCode(char c) {
        return COLOR_ORDINALS.containsKey(c);
    }

    public static int getColorOrdinal(char c) {
        return COLOR_ORDINALS.getOrDefault(c, -1);
    }

    public static String translateAlternateColorCodes(String s) {
        char[] chars = s.toCharArray();
        for (int i = 0; i < chars.length - 1; i++) {
            if (chars[i] == '&' && ALL_CODES.indexOf(chars[i + 1]) > -1) {
                chars[i] = COLOR_CHAR;
                chars[i + 1] = Character.toLowerCase(chars[i + 1]);
            }
        }
        return new String(chars);
    }

    public static String stripColor(final String input) {
        return STRIP_COLOR_PATTERN.matcher(input).replaceAll("");
    }

    private static void addColorOrdinal(int from, int to) {
        for (int c = from; c <= to; c++) {
            addColorOrdinal(c);
        }
    }

    private static void addColorOrdinal(int colorChar) {
        COLOR_ORDINALS.put(colorChar, ordinalCounter++);
    }
}
