Module-Guilds/src/main/java/dev/plex/command/GuildCommand.java

package dev.plex.command;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;
import dev.plex.command.annotation.CommandParameters;
import dev.plex.command.annotation.CommandPermissions;
import dev.plex.command.source.RequiredCommandSource;
import dev.plex.command.sub.CreateSubCommand;
import dev.plex.command.sub.InfoSubCommand;
import dev.plex.command.sub.PrefixSubCommand;
import dev.plex.rank.enums.Rank;
import dev.plex.util.GuildUtil;
import dev.plex.util.PlexLog;
import net.kyori.adventure.text.Component;
import org.bukkit.command.CommandSender;
import org.bukkit.command.ConsoleCommandSender;
import org.bukkit.entity.Player;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.util.Arrays;
import java.util.List;
import java.util.Locale;

@CommandParameters(name = "guild", description = "Guild menu", aliases = "guilds")
@CommandPermissions(level = Rank.OP, permission = "plex.guilds.guild")
public class GuildCommand extends PlexCommand
{
    private final List<PlexCommand> subCommands = Lists.newArrayList();

    public GuildCommand()
    {
        try
        {
            this.registerSubCommand(new CreateSubCommand());
            this.registerSubCommand(new InfoSubCommand());
            this.registerSubCommand(new PrefixSubCommand());
        } catch (Exception e)
        {
            GuildUtil.throwExceptionSync(e);
        }
    }

    @Override
    protected Component execute(@NotNull CommandSender commandSender, @Nullable Player player, @NotNull String[] args)
    {
        if (args.length == 0)
        {
            return messageComponent("guildsHelpCommand");
        }
        PlexCommand subCommand = getSubCommand(args[0]);
        if (subCommand == null)
        {
            return messageComponent("guildCommandNotFound", args[0]);
        }

        CommandPermissions permissions = subCommand.getClass().getDeclaredAnnotation(CommandPermissions.class);
        if (permissions.source() == RequiredCommandSource.CONSOLE && commandSender instanceof Player)
        {
            return messageComponent("noPermissionInGame");
        }

        if (permissions.source() == RequiredCommandSource.IN_GAME && commandSender instanceof ConsoleCommandSender)
        {
            return messageComponent("noPermissionConsole");
        }

        checkRank(player, permissions.level(), permissions.permission());

        return subCommand.execute(commandSender, player, Arrays.copyOfRange(args, 1, args.length));
    }

    private PlexCommand getSubCommand(String label)
    {
        return subCommands.stream().filter(cmd ->
        {
            CommandParameters commandParameters = cmd.getClass().getDeclaredAnnotation(CommandParameters.class);
            return commandParameters.name().equalsIgnoreCase(label) || Arrays.stream(commandParameters.aliases().split(",")).anyMatch(s -> s.equalsIgnoreCase(label));
        }).findFirst().orElse(null);
    }

    private void registerSubCommand(PlexCommand subCommand)
    {
        if (!subCommand.getClass().isAnnotationPresent(CommandPermissions.class))
        {
            throw new RuntimeException("CommandPermissions annotation for guild sub command " + subCommand.getName() + " could not be found!");
        }

        if (!subCommand.getClass().isAnnotationPresent(CommandParameters.class))
        {
            throw new RuntimeException("CommandParameters annotation for guild sub command " + subCommand.getName() + " could not be found!");
        }
        this.subCommands.add(subCommand);
    }

    @Override
    public @NotNull List<String> tabComplete(@NotNull CommandSender sender, @NotNull String alias, @NotNull String[] args) throws IllegalArgumentException
    {
        if (args.length == 1)
        {
            List<String> possibleCommands = Lists.newArrayList();
            if (!args[0].isEmpty())
            {
                subCommands.forEach(plexCommand ->
                {
                    plexCommand.getAliases().stream().filter(s -> s.toLowerCase(Locale.ROOT).startsWith(args[0].toLowerCase(Locale.ROOT))).forEach(possibleCommands::add);
                    if (plexCommand.getName().toLowerCase(Locale.ROOT).startsWith(args[0].toLowerCase(Locale.ROOT)))
                    {
                        possibleCommands.add(plexCommand.getName());
                    }
                });
            }
            return possibleCommands;
        }
        if (args.length == 2)
        {
            PlexCommand subCommand = getSubCommand(args[0]);
            if (subCommand != null)
            {
                return subCommand.tabComplete(sender, alias, Arrays.copyOfRange(args, 1, args.length));
            }
        }
        return ImmutableList.of();
    }
}