package com.lumaserv.bgp.protocol.attribute;

import java.nio.ByteBuffer;

import lombok.Getter;
import lombok.Setter;

import java.util.EnumSet;

@Getter
@Setter
public class OriginAttribute implements PathAttribute {

    @Getter
    enum Origin {
        IGP(0),
        EGP(1),
        INCOMPLETE(2);

        byte code;

        Origin(int code) {
            this.code = (byte)code;
        }

        public static Origin fromByte(byte code) {
            return EnumSet.allOf(Origin.class)
                .stream()
                .filter(e -> e.getCode() == code)
                .findAny()
                .orElseThrow(() -> new IllegalArgumentException("unknown origin: " + code));
        }
    }

    Origin origin;

    public OriginAttribute(byte typeCode, byte[] data) {
        origin = Origin.fromByte(data[0]);
    }

    public byte getTypeCode() {
        return 1;
    }

    public void build(ByteBuffer b) {
        b.put(origin);
    }

    public String toString() {
        return origin.toString();
    }
}