package org.handwerkszeug.dns.record;

import java.util.List;

import org.handwerkszeug.dns.Name;
import org.handwerkszeug.dns.NameCompressor;
import org.handwerkszeug.dns.RRType;
import org.handwerkszeug.dns.ResourceRecord;
import org.handwerkszeug.util.CompareUtil;

import io.netty.buffer.ByteBuf;

/**
 * 3.3.13. SOA RDATA format
 * <p>
 * <pre>
 * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
 * /                     MNAME                     /
 * /                                               /
 * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
 * /                     RNAME                     /
 * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
 * |                    SERIAL                     |
 * |                                               |
 * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
 * |                    REFRESH                    |
 * |                                               |
 * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
 * |                     RETRY                     |
 * |                                               |
 * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
 * |                    EXPIRE                     |
 * |                                               |
 * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
 * |                    MINIMUM                    |
 * |                                               |
 * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
 * </pre>
 */
public
class SOARecord extends AbstractRecord<SOARecord> {

    /**
     * The <domain-name> of the name server that was the original or primary
     * source of data for this zone.
     */
    protected Name mname;

    /**
     * A <domain-name> which specifies the mailbox of the person responsible for
     * this zone.
     */
    protected Name rname;

    /**
     * The unsigned 32 bit version number of the original copy of the zone. Zone
     * transfers preserve this value. This value wraps and should be compared
     * using sequence space arithmetic.
     */
    protected long serial;

    /**
     * A 32 bit time interval before the zone should be refreshed.
     */
    protected long refresh;

    /**
     * A 32 bit time interval that should elapse before a failed refresh should
     * be retried.
     */
    protected long retry;

    /**
     * A 32 bit time value that specifies the upper limit on the time interval
     * that can elapse before the zone is no longer authoritative.
     */
    protected long expire;

    /**
     * The unsigned 32 bit minimum TTL field that should be exported with any RR
     * from this zone.
     */
    protected long minimum;

    public
    SOARecord() {
        super(RRType.SOA);
    }

    public
    SOARecord(SOARecord from) {
        super(from);
        this.mname(from.mname());
        this.rname(from.rname());
        this.serial(from.serial());
        this.refresh(from.refresh());
        this.retry(from.retry());
        this.expire(from.expire());
        this.minimum(from.minimum());
    }

    /**
     * The <domain-name> of the name server that was the original or primary
     * source of data for this zone.
     */
    public
    Name mname() {
        return this.mname;
    }

    public
    void mname(Name name) {
        this.mname = name;
    }

    public
    Name rname() {
        return this.rname;
    }

    public
    void rname(Name name) {
        this.rname = name;
    }

    public
    long serial() {
        return this.serial;
    }

    public
    void serial(long uint) {
        this.serial = uint & 0xFFFFFFFFL;
    }

    public
    long refresh() {
        return this.refresh;
    }

    public
    void refresh(long uint) {
        this.refresh = uint & 0xFFFFFFFFL;
    }

    public
    long retry() {
        return this.retry;
    }

    public
    void retry(long uint) {
        this.retry = uint & 0xFFFFFFFFL;
    }

    public
    long expire() {
        return this.expire;
    }

    public
    void expire(long uint) {
        this.expire = uint & 0xFFFFFFFFL;
    }

    public
    long minimum() {
        return this.minimum;
    }

    public
    void minimum(long uint) {
        this.minimum = uint & 0xFFFFFFFFL;
    }

    @Override
    protected
    void parseRDATA(ByteBuf buffer) {
        this.mname(new Name(buffer));
        this.rname(new Name(buffer));
        this.serial(buffer.readUnsignedInt());
        this.refresh(buffer.readUnsignedInt());
        this.retry(buffer.readUnsignedInt());
        this.expire(buffer.readUnsignedInt());
        this.minimum(buffer.readUnsignedInt());
    }

    @Override
    protected
    void writeRDATA(ByteBuf buffer, NameCompressor compressor) {
        this.mname()
            .write(buffer, compressor);
        this.rname()
            .write(buffer, compressor);
        buffer.writeInt((int) this.serial());
        buffer.writeInt((int) this.refresh());
        buffer.writeInt((int) this.retry());
        buffer.writeInt((int) this.expire());
        buffer.writeInt((int) this.minimum());
    }

    @Override
    protected
    ResourceRecord newInstance() {
        return new SOARecord(this);
    }

    @Override
    public
    int compareTo(SOARecord o) {
        if (this == o) {
            return 0;
        }
        int result = super.compareTo(o);
        if (result != 0) {
            return result;
        }
        result = this.mname()
                     .compareTo(o.mname());
        if (result != 0) {
            return result;
        }
        result = this.rname()
                     .compareTo(o.rname());
        if (result != 0) {
            return result;
        }
        result = CompareUtil.compare(this.serial(), o.serial());
        if (result != 0) {
            return result;
        }
        result = CompareUtil.compare(this.refresh(), o.refresh());
        if (result != 0) {
            return result;
        }
        result = CompareUtil.compare(this.retry(), o.retry());
        if (result != 0) {
            return result;
        }
        result = CompareUtil.compare(this.expire(), o.expire());
        if (result != 0) {
            return result;
        }
        return CompareUtil.compare(this.minimum(), o.minimum());
    }

    @Override
    public
    String toString() {
        StringBuilder stb = new StringBuilder();
        stb.append(super.toString());
        stb.append(' ');
        stb.append(this.mname());
        stb.append(' ');
        stb.append(this.rname());
        stb.append(' ');
        stb.append(this.serial());
        stb.append(' ');
        stb.append(this.refresh());
        stb.append(' ');
        stb.append(this.retry());
        stb.append(' ');
        stb.append(this.expire());
        stb.append(' ');
        stb.append(this.minimum());
        return stb.toString();
    }

    @Override
    public
    void setRDATA(List<String> list) {
        if (6 < list.size()) {
            // XXX
        }
        else {
            // TODO error message.
            throw new IllegalArgumentException();
        }
    }
}