package lbd.listeners;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Random;

import net.dv8tion.jda.api.entities.ChannelType;
import net.dv8tion.jda.api.entities.MessageChannel;
import net.dv8tion.jda.api.entities.User;
import net.dv8tion.jda.api.events.message.MessageReceivedEvent;
import net.dv8tion.jda.api.hooks.ListenerAdapter;

public class MessageListener extends ListenerAdapter {

    private boolean gamerunning = false;
    private MessageChannel admin = null;
    private ArrayList<User> users = new ArrayList<>();
    private HashMap<User, MessageChannel> player = new HashMap<>();
    private HashMap<User, String> words = new HashMap<>();
    private HashMap<User, String> assignedWords = new HashMap<>();

    @Override
    public void onMessageReceived(MessageReceivedEvent event) {

        if (event.getAuthor().isBot())
            return;

        if (event.getChannelType().equals(ChannelType.PRIVATE)) {

            String[] args = event.getMessage().getContentDisplay().split(" ");

            if (args.length < 2 && !event.getAuthor().getAsTag().equals("Debye Scherrer#1960")) {
                event.getChannel().sendMessage("Syntax Error: Use: /join <word>").queue();
                return;
            }

            if (args[0].charAt(0) == '/') {
                if (event.getAuthor().getAsTag().equals("Debye Scherrer#1960")) {
                    if (admin == null)
                        admin = event.getChannel();
                    switch (args[0]) {
                    case "/stop":
                        gamerunning = false;
                        player.clear();
                        users.clear();
                        words.clear();
                        assignedWords.clear();
                        event.getChannel().sendMessage("You stopped the game.").queue();
                        break;
                    case "/start":
                        gamerunning = true;
                        event.getChannel().sendMessage("You starded the game.").queue();
                        assignWords();
                        sendWords();
                        break;
                    case "/list":
                        event.getChannel().sendMessage("Following players joined with following words:").queue();
                        for (User u : users) {
                            event.getChannel().sendMessage(u.getAsTag() + " : " + words.get(u)).queue();
                        }
                        break;
                    }
                }

                switch (args[0]) {
                case "/join":

                    if (gamerunning) {
                        event.getChannel()
                                .sendMessage(
                                        "Das Spiel läuft schon, du kannst nicht mehr beitreten oder dein Wort ändern.")
                                .queue();
                        return;
                    }

                    String word = args[1];
                    for(int i = 2; i < args.length; i++){
                        word = word + " " + args[i];
                    }

                    if (!users.contains(event.getAuthor())) {
                        users.add(event.getAuthor());
                        player.put(event.getAuthor(), event.getChannel());
                        words.put(event.getAuthor(), word);
                        event.getChannel()
                                .sendMessage("Du bist dem Spiel mit dem Wort \"" + word
                                        + "\" beigetreten. Falls du dein Wort ändern möchtest, nutze einfach wieder den Befehl: /join <Wort> , dann wird dein Wort ersetzt.")
                                .queue();
                        admin.sendMessage(event.getAuthor().getAsTag() + " has joined.").queue();
                    } else {
                        words.put(event.getAuthor(), word);
                        event.getChannel().sendMessage("Du hast dein Wort ersetzt, dein neues Wort ist: \"" + word + "\".")
                                .queue();
                        admin.sendMessage(event.getAuthor().getAsTag() + " has changed his/her word.").queue();
                    }
                    break;
                }

            }
        }

    }

    private void assignWords() {

        Random rand = new Random();
        int shift = rand.nextInt(users.size());

        for (int i = 0; i < users.size(); i++) {
            int index = ((i + shift) % users.size());
            if (index == i)
                index = (index + 1) % users.size();
            String word = words.get(users.get(index));
            assignedWords.put(users.get(i), word);
        }

    }

    private void sendWords() {

        for (User u : users) {
            player.get(u).sendMessage("Folgende Spieler müssen folgende Worte erraten: ").queue();

            for (User u2 : users) {

                if (!u.equals(u2)) {
                    player.get(u).sendMessage(u2.getAsTag() + " : " + assignedWords.get(u2)).queue();
                }

            }
        }
    }

}