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package io.pkts.packet.sip.impl;

import io.pkts.buffer.Buffer;
import io.pkts.packet.sip.SipParseException;
import io.pkts.packet.sip.SipRequest;
import io.pkts.packet.sip.SipResponse;
import io.pkts.packet.sip.address.URI;
import io.pkts.packet.sip.header.SipHeader;

import java.util.List;

/**
 * @author [email protected]
 */
public class ImmutableSipRequest extends ImmutableSipMessage implements SipRequest {


    /**
     * @param message            the full immutable buffer which has the entire SIP message in it, including all headers, body
     *                           initial line etc.
     * @param initialLine        the parsed initial line (which is just a reference into the message buffer)
     * @param headers
     * @param indexOfTo
     * @param indexOfFrom
     * @param indexOfCSeq
     * @param indexOfCallId
     * @param indexOfMaxForwards
     * @param indexOfVia
     * @param indexOfRoute
     * @param indexOfRecordRoute
     * @param indexOfContact
     * @param body
     */
    protected ImmutableSipRequest(final Buffer message,
                                  final SipRequestLine initialLine,
                                  final List headers,
                                  final short indexOfTo,
                                  final short indexOfFrom,
                                  final short indexOfCSeq,
                                  final short indexOfCallId,
                                  final short indexOfMaxForwards,
                                  final short indexOfVia,
                                  final short indexOfRoute,
                                  final short indexOfRecordRoute,
                                  final short indexOfContact,
                                  final Buffer body) {
        super(message, initialLine, headers, indexOfTo,
                indexOfFrom, indexOfCSeq, indexOfCallId,
                indexOfMaxForwards, indexOfVia, indexOfRoute,
                indexOfRecordRoute, indexOfContact, body);
    }

    @Override
    public URI getRequestUri() throws SipParseException {
        return getInitialLineAsObject().toRequestLine().getRequestUri();
    }

    @Override
    public Buffer getMethod() throws SipParseException {
        return getInitialLineAsObject().toRequestLine().getMethod();
    }

    @Override
    public SipResponse.Builder createResponse(final int responseCode, final Buffer content) throws SipParseException, ClassCastException {
        final SipResponse.Builder builder = SipResponse.withStatusCode(responseCode);
        builder.withFromHeader(getFromHeader());
        builder.withToHeader(getToHeader());
        builder.withCSeqHeader(getCSeqHeader());
        builder.withCallIdHeader(getCallIDHeader());
        builder.withViaHeaders(getViaHeaders());
        return builder;
    }

    @Override
    public SipRequest.Builder copy() {
        final SipRequest.Builder builder = SipRequest.withMethod(getMethod()).withRequestURI(getRequestUri());
        builder.withHeaders(getAllHeaders());
        builder.withBody(getContent());
        return builder;
    }


    @Override
    final public SipRequest clone() {
        // everything is immutable so no real reason to actually clone
        // TODO: remove the clone method alltogether?
        return this;
    }

}