package net.sourceforge.fenixedu.domain;

import java.util.Set;

import net.sourceforge.fenixedu.domain.accessControl.FixedSetGroup;
import net.sourceforge.fenixedu.domain.accessControl.Group;
import net.sourceforge.fenixedu.domain.accessControl.groups.language.Argument;
import net.sourceforge.fenixedu.domain.accessControl.groups.language.GroupBuilder;
import net.sourceforge.fenixedu.domain.util.Verhoeff;

import org.apache.commons.lang.StringUtils;

public class LibraryCardSystem extends LibraryCardSystem_Base {

    private static final String MILLENIUM_INSTITUTION_PREFIX = "0710";

    private static final int COUNTER_SIZE = 5;

    private static final String CODE_FILLER = "0";

    public LibraryCardSystem() {
	super();
    }

    @Override
    public Group getHigherClearenceGroup() {
	Group group = super.getHigherClearenceGroup();
	if (group == null) {
	    group = new FixedSetGroup();
	    setHigherClearenceGroup(group);
	}
	return group;
    }

    public String generateNewMilleniumCode() {
	setMilleniumCodeCounter(getMilleniumCodeCounter() + 1);
	String baseCode = MILLENIUM_INSTITUTION_PREFIX
		+ StringUtils.leftPad(Integer.toString(getMilleniumCodeCounter()), COUNTER_SIZE, CODE_FILLER);
	return baseCode + Verhoeff.generateVerhoeff(baseCode);
    }

    public static class HigherClearenceGroupBuilder implements GroupBuilder {

	static final public String GROUP_EXPRESSION_NAME = "libraryHigherClearanceGroup";

	@Override
	public Group build(Object[] arguments) {
	    return new Group() {

		@Override
		protected String getGroupExpressionName() {
		    return GROUP_EXPRESSION_NAME;
		}

		@Override
		protected Argument[] getExpressionArguments() {
		    return new Argument[0];
		}

		@Override
		public Set<Person> getElements() {
		    return RootDomainObject.getInstance().getLibraryCardSystem().getHigherClearenceGroup().getElements();
		}
	    };
	}

	@Override
	public int getMinArguments() {
	    return 0;
	}

	@Override
	public int getMaxArguments() {
	    return 0;
	}

    }
}