package org.argeo.osgi.useradmin;

import java.util.ArrayList;
import java.util.List;

import javax.naming.NamingEnumeration;
import javax.naming.directory.Attribute;
import javax.naming.directory.Attributes;
import javax.naming.ldap.LdapName;

import org.osgi.service.useradmin.Group;
import org.osgi.service.useradmin.Role;

public class LdifGroup extends LdifUser implements Group {
	// optimisation
	List<Role> directMembers = null;

	private String memberAttrName = "member";

	public LdifGroup(LdapName dn, Attributes attributes) {
		super(dn, attributes);
	}

	@Override
	public boolean addMember(Role role) {
		Attribute member = getAttributes().get(memberAttrName);
		if (member != null) {
			if (member.contains(role.getName()))
				return false;
		} else
			getAttributes().put(memberAttrName, role.getName());
		directMembers.add(role);
		if (role instanceof LdifUser)
			((LdifUser) role).directMemberOf.add(this);
		return true;
	}

	@Override
	public boolean addRequiredMember(Role role) {
		throw new UnsupportedOperationException();
	}

	@Override
	public boolean removeMember(Role role) {
		Attribute member = getAttributes().get(memberAttrName);
		if (member != null) {
			if (!member.contains(role.getName()))
				return false;
			member.remove(role.getName());
			directMembers.remove(role);
			if (role instanceof LdifUser)
				((LdifUser) role).directMemberOf.remove(this);
			return true;
		} else
			return false;
	}

	@Override
	public Role[] getMembers() {
		if (directMembers != null)
			return directMembers.toArray(new Role[directMembers.size()]);
		else
			throw new ArgeoUserAdminException("Members have not been loaded.");

		// Attribute memberAttribute = getAttributes().get(memberAttrName);
		// if (memberAttribute == null)
		// return new Role[0];
		// try {
		// List<Role> roles = new ArrayList<Role>();
		// NamingEnumeration values = memberAttribute.getAll();
		// while (values.hasMore()) {
		// LdapName dn = new LdapName(values.next().toString());
		// roles.add(new LdifUser(dn, null));
		// }
		// return roles.toArray(new Role[roles.size()]);
		// } catch (Exception e) {
		// throw new ArgeoUserAdminException("Cannot get members", e);
		// }
	}

//	void loadMembers(LdifUserAdmin userAdmin) {
//		directMembers = new ArrayList<Role>();
//		for (LdapName ldapName : getMemberNames()) {
//			LdifUser role;
//			if (userAdmin.groups.containsKey(ldapName))
//				role = userAdmin.groups.get(ldapName);
//			else if (userAdmin.users.containsKey(ldapName))
//				role = userAdmin.users.get(ldapName);
//			else
//				throw new ArgeoUserAdminException("No role found for "
//						+ ldapName);
//			role.directMemberOf.add(this);
//			directMembers.add(role);
//		}
//	}

	List<LdapName> getMemberNames() {
		Attribute memberAttribute = getAttributes().get(memberAttrName);
		if (memberAttribute == null)
			return new ArrayList<LdapName>();
		try {
			List<LdapName> roles = new ArrayList<LdapName>();
			NamingEnumeration<?> values = memberAttribute.getAll();
			while (values.hasMore()) {
				LdapName dn = new LdapName(values.next().toString());
				roles.add(dn);
			}
			return roles;
		} catch (Exception e) {
			throw new ArgeoUserAdminException("Cannot get members", e);
		}
	}

	@Override
	public Role[] getRequiredMembers() {
		throw new UnsupportedOperationException();
	}

	@Override
	public int getType() {
		return GROUP;
	}

	public String getMemberAttrName() {
		return memberAttrName;
	}
	
	
}