package eu.univento.core.api;

import org.bukkit.Bukkit;
import org.bukkit.command.Command;
import org.bukkit.command.CommandMap;
import org.bukkit.command.CommandSender;
import org.bukkit.plugin.java.JavaPlugin;

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

/**
 * @author PostCrafter
 * @see href http://postcrafter.de/viewtopic.php?f=15&t=143
 * @param <P> main class
 */
public abstract class AutoCommand<P extends JavaPlugin> extends Command {
	
	private static String VERSION;

	static {
		String path = Bukkit.getServer().getClass().getPackage().getName();

		AutoCommand.VERSION = path.substring(path.lastIndexOf(".") + 1, path.length());

		System.out.println("[PostLib] AutoCommand hook for Bukkit " + AutoCommand.VERSION);
	}

	protected final P plugin;
	protected final String command;

	public AutoCommand(P plugin, String command, String description, String... aliases) {
		super(command);
		this.plugin = plugin;
		this.command = command;

		super.setDescription(description);
		List<String> aliasList = new ArrayList<String>();
		for (String alias : aliases) {
			aliasList.add(alias);
		}
		super.setAliases(aliasList);

		this.register();
	}

	public void register() {
		try {
			Field f = Class.forName("org.bukkit.craftbukkit." + AutoCommand.VERSION + ".CraftServer").getDeclaredField("commandMap");
			f.setAccessible(true);

			CommandMap map = (CommandMap) f.get(Bukkit.getServer());
			map.register(this.plugin.getName(), this);
		} catch (Exception exc) {
			exc.printStackTrace();
		}
	}

	public abstract boolean execute(CommandSender sender, String label, String[] args);

	public abstract List<String> tabComplete(CommandSender sender, String label, String[] args);

	public String buildString(String[] args, int start) {
		String str = "";
		if (args.length > start) {
			str += args[start];
			for (int i = start + 1; i < args.length; i++) {
				str += " " + args[i];
			}
		}
		return str;
	}

	public P getPlugin() {
		return this.plugin;
	}
}