package net.sourceforge.fenixedu.domain.accessControl;

import java.util.HashSet;
import java.util.Set;

import net.sourceforge.fenixedu.domain.Person;
import net.sourceforge.fenixedu.domain.accessControl.groups.language.Argument;
import net.sourceforge.fenixedu.domain.accessControl.groups.language.GroupBuilder;
import net.sourceforge.fenixedu.domain.accessControl.groups.language.exceptions.VariableNotDefinedException;
import net.sourceforge.fenixedu.domain.accessControl.groups.language.operators.ClassOperator;
import net.sourceforge.fenixedu.domain.accessControl.groups.language.operators.IdOperator;
import net.sourceforge.fenixedu.domain.organizationalStructure.Accountability;
import net.sourceforge.fenixedu.domain.organizationalStructure.ResearchContract;
import net.sourceforge.fenixedu.domain.organizationalStructure.ResearchUnit;
import net.sourceforge.fenixedu.util.BundleUtil;

public class ResearchUnitMembersGroup extends DomainBackedGroup<ResearchUnit> {

    private final Class classType;

    private static final long serialVersionUID = 1L;

    public ResearchUnitMembersGroup(ResearchUnit unit, Class type) {
	super(unit);
	this.classType = type;
    }

    @Override
    public String getName() {
	return BundleUtil.getResourceString("resources.MessagingResources", "label." + classType.getSimpleName());
    }

    @Override
    public Set<Person> getElements() {
	Set<Person> people = new HashSet<Person>();
	for (Accountability accountability : getObject().getActiveResearchContracts(classType)) {
	    ResearchContract contract = (ResearchContract) accountability;
	    people.add(contract.getPerson());
	}
	return people;
    }

    @Override
    protected Argument[] getExpressionArguments() {
	return new Argument[] { new IdOperator(getObject()), new ClassOperator(this.classType) };

    }

    @Override
    public boolean equals(Object other) {
	return super.equals(other) && ((ResearchUnitMembersGroup) other).classType.equals(this.classType);
    }

    @Override
    public int hashCode() {
	return super.hashCode() + this.classType.hashCode();
    }

    public static class Builder implements GroupBuilder {

	public Group build(Object[] arguments) {
	    ResearchUnit unit = (ResearchUnit) arguments[0];
	    Class type = (Class) arguments[1];
	    if (unit == null || type == null) {
		throw new VariableNotDefinedException("unit or contract class");
	    }
	    return new ResearchUnitMembersGroup(unit, type);

	}

	public int getMaxArguments() {
	    return 2;
	}

	public int getMinArguments() {
	    return 2;
	}

    }

}