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/**
 * 
 */
package io.pkts.packet.sip.impl;

import io.pkts.buffer.Buffer;
import io.pkts.buffer.Buffers;

/**
 * @author [email protected]
 */
public final class SipResponseLine extends SipInitialLine {

    /**
     * The status code of the response. I.e., 180, 200, 404 etc etx
     */
    private final int statusCode;

    /**
     * The response reason
     */
    private final Buffer reason;

    private Buffer responseLine;

    public SipResponseLine(final int statusCode, final Buffer reason) {
        super();
        assert reason != null;
        this.statusCode = statusCode;
        this.reason = reason;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public boolean isResponseLine() {
        return true;
    }

    @Override
    public SipResponseLine toResponseLine() {
        return this;
    }

    public int getStatusCode() {
        return this.statusCode;
    }

    public Buffer getReason() {
        return this.reason;
    }

    @Override
    public boolean equals(final Object o) {
        if (o == this) {
            return true;
        }
        try {
            final SipResponseLine other = (SipResponseLine)o;
            return statusCode == other.statusCode;
        } catch (final ClassCastException e) {
            return false;
        }
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Buffer getBuffer() {
        // TODO: redo
        if (this.responseLine == null) {
            final StringBuilder sb = new StringBuilder();
            sb.append("SIP/2.0 ").append(this.statusCode).append(" ").append(this.reason.toString());
            this.responseLine = Buffers.wrap(sb.toString());
        }

        return this.responseLine;
    }

    @Override
    public SipResponseLine clone() {
        return new SipResponseLine(this.statusCode, this.reason.clone());
    }

    @Override
    public String toString() {
        return getBuffer().toString();
    }

    @Override
    public void getBytes(final Buffer dst) {
        SipParser.SIP2_0.getBytes(0, dst);
        dst.write(SipParser.SP);
        dst.writeAsString(this.statusCode);
        dst.write(SipParser.SP);
        this.reason.getBytes(0, dst);
    }
}