package com.earth2me.essentials.commands;

import com.earth2me.essentials.IUser;
import com.earth2me.essentials.User;
import net.essentialsx.api.v2.events.TeleportRequestResponseEvent;
import org.bukkit.Bukkit;
import org.bukkit.Server;

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

import static com.earth2me.essentials.I18n.tl;

public class Commandtpdeny extends EssentialsCommand {
    public Commandtpdeny() {
        super("tpdeny");
    }

    @Override
    public void run(final Server server, final User user, final String commandLabel, final String[] args) throws Exception {
        final boolean denyAll;
        if (args.length > 0) {
            denyAll = args[0].equals("*") || args[0].equalsIgnoreCase("all");
        } else {
            denyAll = false;
        }

        if (!user.hasPendingTpaRequests(false, false)) {
            throw new Exception(tl("noPendingRequest"));
        }

        final IUser.TpaRequest denyRequest;
        if (args.length > 0) {
            if (denyAll) {
                denyAllRequests(user);
                return;
            }
            denyRequest = user.getOutstandingTpaRequest(getPlayer(server, user, args, 0).getName(), false);
        } else {
            denyRequest = user.getNextTpaRequest(false, true, false);
        }

        if (denyRequest == null) {
            throw new Exception(tl("noPendingRequest"));
        }

        final User player = ess.getUser(denyRequest.getRequesterUuid());
        if (player == null || !player.getBase().isOnline()) {
            throw new Exception(tl("noPendingRequest"));
        }

        if (sendEvent(user, player, denyRequest)) {
            return;
        }

        user.sendMessage(tl("requestDenied"));
        player.sendMessage(tl("requestDeniedFrom", user.getDisplayName()));
        user.removeTpaRequest(denyRequest.getName());
    }

    private void denyAllRequests(User user) {
        IUser.TpaRequest request;
        int count = 0;
        while ((request = user.getNextTpaRequest(false, true, false)) != null) {
            final User player = ess.getUser(request.getRequesterUuid());

            if (sendEvent(user, player, request)) {
                continue;
            }

            if (player != null && player.getBase().isOnline()) {
                player.sendMessage(tl("requestDeniedFrom", user.getDisplayName()));
            }

            user.removeTpaRequest(request.getName());
            count++;
        }
        user.sendMessage(tl("requestDeniedAll", count));
    }

    private boolean sendEvent(User user, User player, IUser.TpaRequest request) {
        final TeleportRequestResponseEvent event = new TeleportRequestResponseEvent(user, player, request, false);
        Bukkit.getPluginManager().callEvent(event);
        final boolean cancelled = event.isCancelled();
        if (cancelled && ess.getSettings().isDebug()) {
            ess.getLogger().info("TPA deny cancelled by API for " + user.getName() + " (requested by " + player.getName() + ")");
        }
        return event.isCancelled();
    }

    @Override
    protected List<String> getTabCompleteOptions(Server server, User user, String commandLabel, String[] args) {
        if (args.length == 1) {
            final List<String> options = new ArrayList<>(user.getPendingTpaKeys());
            options.add("*");
            return options;
        } else {
            return Collections.emptyList();
        }
    }
}