package de.thedevstack.conversationsplus.xmpp.utils;

import de.thedevstack.conversationsplus.xml.Element;
import de.thedevstack.conversationsplus.xmpp.IqPacketParser;
import de.thedevstack.conversationsplus.xmpp.exceptions.BadRequestIqErrorException;
import de.thedevstack.conversationsplus.xmpp.exceptions.InternalServerErrorException;
import de.thedevstack.conversationsplus.xmpp.exceptions.IqPacketErrorException;
import de.thedevstack.conversationsplus.xmpp.exceptions.ServiceUnavailableException;
import de.thedevstack.conversationsplus.xmpp.exceptions.UndefinedConditionException;
import de.thedevstack.conversationsplus.xmpp.stanzas.ErrorIqPacket;
import de.thedevstack.conversationsplus.xmpp.stanzas.IqErrorCondition;

/**
 */
public final class ErrorIqPacketExceptionHelper {

    public static void throwIqErrorException(Element errorIqPacket) throws IqPacketErrorException {
        Element packet = IqPacketParser.findChild(errorIqPacket, "error", "jabber:client");
        if (null != packet) {
            if (hasErrorElement(packet, IqErrorCondition.BAD_REQUEST.toString())) {
                throw new BadRequestIqErrorException(errorIqPacket, getErrorText(packet));
            }
            if (hasErrorElement(packet, IqErrorCondition.SERVICE_UNAVAILABLE.toString())) {
                throw new ServiceUnavailableException(errorIqPacket, getErrorText(packet));
            }
            if (hasErrorElement(packet, IqErrorCondition.INTERNAL_SERVER_ERROR.toString())) {
                throw new InternalServerErrorException(errorIqPacket, getErrorText(packet));
            }
            if (hasErrorElement(packet, IqErrorCondition.UNDEFINED_CONDITION.toString())) {
                throw new UndefinedConditionException(errorIqPacket, getErrorText(packet));
            }
        }
        throw new IqPacketErrorException(errorIqPacket, "Unknown error packet.");
    }

    private static boolean hasErrorElement(Element packet, String elementName) {
        return null != IqPacketParser.findChild(packet, elementName, ErrorIqPacket.NAMESPACE);
    }

    private static String getErrorText(Element packet) {
        return IqPacketParser.findChildContent(packet, "text", ErrorIqPacket.NAMESPACE);
    }

    private ErrorIqPacketExceptionHelper() {

    }
}