import java.io.*;
import java.util.Vector;

class Data {
    ByteArrayOutputStream bos = new ByteArrayOutputStream(20);
    int active;
    boolean mondayFirst;
    Vector profiles = new Vector();


    private int VERSION_2 = 2;
    private int LAST_VERSION = VERSION_2;

    Data(byte[] raw) throws IOException {
	this(new DataInputStream(new ByteArrayInputStream(raw)));
    }

    Data(DataInput in) throws IOException {
        if (in == null) {
            profiles.addElement(new Profile("#1"));
            active = 0;
            mondayFirst = true;
        } else {
            int version = in.readByte();
            if (version >= VERSION_2) {
                active = in.readShort();
                mondayFirst   = in.readBoolean();
                int size = in.readShort();
                for (int i = 0; i < size; ++i) {
                    profiles.addElement(new Profile(in, version));
                }
            } else {
                byte b = in.readByte();
                active = b & 0x0f;
                b = in.readByte();
                mondayFirst = (b & 0x01) == 0;

                //read all profiles one per record
                //for backwards compat
            }
        }
    }
    
    byte[] serialize() {
	try {
	    ByteArrayOutputStream bos = new ByteArrayOutputStream();
	    writeTo(new DataOutputStream(bos));
	    return bos.toByteArray();
	} catch (IOException e) {
	    Log.log("" + e);
	    throw new Error(""+e);
	}
    }

    void writeTo(DataOutput os) throws IOException {
        os.writeByte((byte)LAST_VERSION);
        os.writeShort(active);
        os.writeBoolean(mondayFirst);
        int size = profiles.size();
        os.writeShort(size);
        for (int i = 0; i < size; ++i) {
            ((Profile) profiles.elementAt(i)).writeTo(os);
        }
    }

    int size() {
        return profiles.size();
    }

    Profile activeProfile() {
        return (Profile) profiles.elementAt(active);
    }

    void merge(Data other) {
	Vector otherProfiles = other.profiles;
	int otherSize = otherProfiles.size();
	for (int i = 0; i < otherSize; ++i) {
	    profiles.addElement(otherProfiles.elementAt(i));
	}
    }

    void setActive(int newActive) {
	int size = profiles.size();
	if (newActive > size) {
	    throw new Error("set profile " + newActive + " among " + size);
	}
	if (newActive == size) {
	    profiles.addElement(new Profile("#"+(newActive+1)));
	}
	active = newActive;	    
    }
}