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package com.gitee.yanfanvip.model;

import java.io.DataInputStream;
import java.io.IOException;
import java.io.Serializable;

import com.gitee.yanfanvip.util.ByteUtil;

public class Frame implements Serializable{
	private static final long serialVersionUID = -2051607561398807413L;
	
	FrameEnum type;
	Row data;
	
	public Frame() { }
	
	public Frame(byte[] bytes) {
		byte[] typeBytes = ByteUtil.sub(bytes, 0, 4);
		byte[] dataLength = ByteUtil.sub(bytes, 4, 4);
		byte[] dataBytes = ByteUtil.sub(bytes, 8, ByteUtil.byteArrayToInt(dataLength));
		this.type = FrameEnum.get(ByteUtil.byteArrayToInt(typeBytes));
		this.data = ByteUtil.getObject(dataBytes);
	}
	
	public Frame(DataInputStream in) throws IOException {
		this.type = FrameEnum.get(in.readInt());
		int dataLength = in.readInt();
		if(dataLength > 0){
			byte[] dataBytes = new byte[dataLength];
			in.read(dataBytes);
			this.data = ByteUtil.getObject(dataBytes);
		}
	}
	
	public Frame(FrameEnum type) {
		this.type = type;
	}
	
	public Frame(FrameEnum type, Row data) {
		this.type = type;
		this.data = data;
	}
	
	public FrameEnum getType() {
		return type;
	}
	public void setType(FrameEnum type) {
		this.type = type;
	}
	public Row getData() {
		return data;
	}
	public void setData(Row data) {
		this.data = data;
	}
	
	public byte[] getByte() {
		byte[] typeBytes = ByteUtil.intToByteArray(type.getType());
		if(data != null){
			byte[] dataBytes = ByteUtil.toBytes(data);
			byte[] dataLength = ByteUtil.intToByteArray(dataBytes.length);
			return ByteUtil.merges(typeBytes, dataLength, dataBytes);
		}else{
			byte[] dataLength = ByteUtil.intToByteArray(0);
			return ByteUtil.merges(typeBytes, dataLength);
		}
	}
	
	@Override
	public String toString() {
		if(data == null){
			return type.name();
		}else{
			return type.name() + ":" + data.toString();
		}
	}
}