LibsDisguises/src/main/java/me/libraryaddict/disguise/commands/DisguiseModifyCommand.java

package me.libraryaddict.disguise.commands;

import me.libraryaddict.disguise.DisguiseAPI;
import me.libraryaddict.disguise.disguisetypes.Disguise;
import me.libraryaddict.disguise.disguisetypes.DisguiseType;
import me.libraryaddict.disguise.utilities.DisguiseUtilities;
import me.libraryaddict.disguise.utilities.parser.*;
import me.libraryaddict.disguise.utilities.parser.params.ParamInfo;
import me.libraryaddict.disguise.utilities.translations.LibsMsg;
import org.apache.commons.lang.StringUtils;
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.command.TabCompleter;
import org.bukkit.entity.Entity;
import org.bukkit.entity.Player;

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;

public class DisguiseModifyCommand extends DisguiseBaseCommand implements TabCompleter {
    @Override
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
        if (!(sender instanceof Entity)) {
            sender.sendMessage(LibsMsg.NO_CONSOLE.get());
            return true;
        }

        DisguisePermissions permissions = getPermissions(sender);

        if (!permissions.hasPermissions()) {
            sender.sendMessage(LibsMsg.NO_PERM.get());
            return true;
        }

        if (args.length == 0) {
            sendCommandUsage(sender, permissions);
            return true;
        }

        Disguise disguise = DisguiseAPI.getDisguise((Player) sender, (Entity) sender);

        if (disguise == null) {
            sender.sendMessage(LibsMsg.NOT_DISGUISED.get());
            return true;
        }

        DisguisePerm disguisePerm = new DisguisePerm(disguise.getType());

        if (!permissions.isAllowedDisguise(disguisePerm)) {
            sender.sendMessage(LibsMsg.DMODIFY_NO_PERM.get());
            return true;
        }

        try {
            DisguiseParser.callMethods(sender, disguise, permissions, disguisePerm, new ArrayList<>(),
                    DisguiseUtilities.split(StringUtils.join(args, " ")));
        }
        catch (DisguiseParseException ex) {
            if (ex.getMessage() != null) {
                sender.sendMessage(ex.getMessage());
            }

            return true;
        }
        catch (Exception ex) {
            ex.printStackTrace();
            return true;
        }

        sender.sendMessage(LibsMsg.DMODIFY_MODIFIED.get());

        return true;
    }

    @Override
    public List<String> onTabComplete(CommandSender sender, Command cmd, String label, String[] origArgs) {
        ArrayList<String> tabs = new ArrayList<>();

        if (!(sender instanceof Player))
            return tabs;

        Disguise disguise = DisguiseAPI.getDisguise((Player) sender, (Entity) sender);

        if (disguise == null)
            return tabs;

        String[] args = getArgs(origArgs);

        DisguisePermissions perms = getPermissions(sender);

        DisguisePerm disguiseType = new DisguisePerm(disguise.getType());

        ArrayList<String> usedOptions = new ArrayList<>();

        for (Method method : ParamInfoManager.getDisguiseWatcherMethods(disguiseType.getWatcherClass())) {
            for (int i = disguiseType.getType() == DisguiseType.PLAYER ? 2 : 1; i < args.length; i++) {
                String arg = args[i];

                if (!method.getName().equalsIgnoreCase(arg))
                    continue;

                usedOptions.add(arg);
            }
        }

        if (perms.isAllowedDisguise(disguiseType, usedOptions)) {
            boolean addMethods = true;

            if (args.length > 0) {
                String prevArg = args[args.length - 1];

                ParamInfo info = ParamInfoManager.getParamInfo(disguiseType, prevArg);

                if (info != null) {
                    if (!info.isParam(boolean.class)) {
                        addMethods = false;
                    }

                    if (info.hasValues()) {
                        tabs.addAll(info.getEnums(origArgs[origArgs.length - 1]));
                    } else if (info.isParam(String.class)) {
                        for (Player player : Bukkit.getOnlinePlayers()) {
                            // If command user cannot see player online, don't tab-complete name
                            if (sender instanceof Player && !((Player) sender).canSee(player)) {
                                continue;
                            }

                            tabs.add(player.getName());
                        }
                    }
                }
            }

            if (addMethods) {
                // If this is a method, add. Else if it can be a param of the previous argument, add.
                for (Method method : ParamInfoManager.getDisguiseWatcherMethods(disguiseType.getWatcherClass())) {
                    tabs.add(method.getName());
                }
            }
        }

        return filterTabs(tabs, origArgs);
    }

    /**
     * Send the player the information
     */
    @Override
    protected void sendCommandUsage(CommandSender sender, DisguisePermissions permissions) {
        ArrayList<String> allowedDisguises = getAllowedDisguises(permissions);

        sender.sendMessage(LibsMsg.DMODIFY_HELP3.get());
        sender.sendMessage(LibsMsg.DMODIFY_HELP3.get());
        sender.sendMessage(LibsMsg.DMODIFY_HELP3
                .get(ChatColor.GREEN + StringUtils.join(allowedDisguises, ChatColor.RED + ", " + ChatColor.GREEN)));
    }
}