package io.github.moulberry.notenoughupdates;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class StreamerMode {

    private static final Pattern lobbyPattern = Pattern.compile("(mini|mega)([0-9]{1,3}[A-Z])");

    public static String filterLobbyNames(String line) {
        Matcher matcher = lobbyPattern.matcher(line);
        if(matcher.find() && matcher.groupCount() == 2) {
            String lobbyType = matcher.group(1);
            String lobbyId = matcher.group(2);
            long lobbyNum = Long.parseLong(lobbyId.substring(0, lobbyId.length()-1));

            long obfLobbyNum = (lobbyNum*9182739 + 11) % 500;
            char obfLobbyLetter = "ABCDEFGHIJKLMNOPQRSTUVWXYZ".charAt((int)(obfLobbyNum%26));

            line = line.replaceAll("(mini|mega|m|M)([0-9]{1,3}[A-Z])", lobbyType+obfLobbyNum+obfLobbyLetter);
        }
        return line;
    }

    public static String filterScoreboard(String line) {
        line = filterLobbyNames(cleanDuplicateColourCodes(line));
        return line;
    }

    public static String filterChat(String line) {
        line = filterLobbyNames(line);
        return line;
    }

    private static String cleanDuplicateColourCodes(String line) {
        StringBuilder sb = new StringBuilder();
        char currentColourCode = 'r';
        boolean sectionSymbolLast = false;
        for(char c : line.toCharArray()) {
            if((int)c > 50000) continue;

            if(c == '\u00a7') {
                sectionSymbolLast = true;
            } else {
                if(sectionSymbolLast) {
                    if(currentColourCode != c) {
                        sb.append('\u00a7');
                        sb.append(c);
                        currentColourCode = c;
                    }
                    sectionSymbolLast = false;
                } else {
                    sb.append(c);
                }
            }
        }
        return sb.toString();
    }

}