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package com.netflix.astyanax.serializers;

import java.nio.ByteBuffer;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

import org.apache.cassandra.db.marshal.TimeUUIDType;

import com.netflix.astyanax.util.TimeUUIDUtils;

public class TimeUUIDSerializer extends UUIDSerializer {

    private static final TimeUUIDSerializer instance = new TimeUUIDSerializer();

    public static TimeUUIDSerializer get() {
        return instance;
    }

    @Override
    public ComparatorType getComparatorType() {
        return ComparatorType.TIMEUUIDTYPE;
    }

    @Override
    public ByteBuffer fromString(String str) {
        return TimeUUIDType.instance.fromString(str);
    }

    @Override
    public String getString(ByteBuffer byteBuffer) {
        if (byteBuffer == null) return null;
        ByteBuffer dup = byteBuffer.duplicate();
        long micros = TimeUUIDUtils.getMicrosTimeFromUUID(this.fromByteBuffer(dup));
        return new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ").format(new Date(micros / 1000));
    }

    @Override
    public ByteBuffer getNext(ByteBuffer byteBuffer) {
        UUID uuid = fromByteBuffer(byteBuffer.duplicate());
        return toByteBuffer(new java.util.UUID(uuid.getMostSignificantBits(), uuid.getLeastSignificantBits() + 1));
    }

}