package com.framsticks.params;

import java.lang.reflect.Field;
import org.apache.log4j.Logger;

import com.framsticks.util.lang.Delimeted;

/**
 * The class Flags contains constants connected with parameter features as
 * well as feedback about set operation (when setting parameter value).
 *
 * Based on c++ defines located in: cpp/gdk/param.h
 *
 * @author Jarek Szymczak <name.surname@gmail.com>
 * (please replace name and surname with my personal data)
 *
 * @@author Piotr Sniegowski
 */
public final class Flags {

	private final static Logger log = Logger.getLogger(Flags.class.getName());

	public static final int READONLY = 1;

	public static final int DONTSAVE = 2;

	public static final int USERREADONLY = 16;

	public static final int USERHIDDEN = 32;

	public static final int MUTALLOCENTRY = 64;

	public static final int MUTALLOCDATA = 128;

	public static final int NOSTATIC = 256;

	public static final int CONST = 512;

	public static final int CANOMITNAME = 1024;

	public static final int DONTLOAD = 2048;

	public static final int PSET_RONLY = 1;

	public static final int PSET_CHANGED = 2;

	public static final int PSET_HITMIN = 4;

	public static final int PSET_HITMAX = 8;

	public static String write(int flags, String empty) {
		Delimeted<String> d = new Delimeted<String>("+", empty);
		try {
			for (Field f : Flags.class.getDeclaredFields()) {
				if (f.getType() != int.class) {
					continue;
				}
				if ((flags & f.getInt(null)) != 0) {
					d.append(f.getName());
				}
			}
		} catch (IllegalArgumentException | IllegalAccessException e) {
			e.printStackTrace();
		}
		return d.build();
	}

	public static Integer read(String flags) {
		Integer allFlags = 0;
		String[] flagsSplitted = flags.split("\\+");
		for (String flag : flagsSplitted) {
			try {
				allFlags |= Integer.valueOf(flag);
			} catch (NumberFormatException ex) {
				try {
					Field field = Flags.class.getDeclaredField(flag.toUpperCase());
					allFlags |= Integer.parseInt(field.get(null).toString());
				} catch (SecurityException e) {
					log.warn("security exception was thrown while trying to read flag (" + flag + ")");
				} catch (NoSuchFieldException | IllegalArgumentException | IllegalAccessException e) {
					log.warn("selected flag is not known (" + flag + ")");
				}
			}
		}
		return allFlags;
	}
}