package speiger.src.coreengine.rendering.models;

import java.nio.ByteBuffer;
import java.util.Map;

import com.google.gson.JsonElement;

import speiger.src.collections.objects.maps.impl.hash.Object2ObjectOpenHashMap;
import speiger.src.coreengine.rendering.models.loader.VertexLoader.JsonList;

public enum DataType
{
	BYTE("byte", 1),
	SHORT("short", 2),
	INT("int", 4),
	LONG("long", 8),
	FLOAT("float", 4),
	DOUBLE("double", 8);
	
	static final Map<String, DataType> BY_ID = new Object2ObjectOpenHashMap<>();
	final String type;
	final int byteSize;
	
	private DataType(String type, int byteSize)
	{
		this.type = type;
		this.byteSize = byteSize;
	}
	
	public String getType()
	{
		return type;
	}
	
	public int getByteSize()
	{
		return byteSize;
	}
	
	public boolean isFloatingPoint()
	{
		return this == FLOAT || this == DOUBLE;
	}
	
	public void putIntoBuffer(ByteBuffer buffer, JsonList list, int offset, int stride, int size)
	{
		int index = offset;
		for(int i = 0,m=list.size();i<m;)
		{
			putIntoBuffer(buffer, index, list.get(i));
			index += byteSize;
			if(++i % size == 0) {
				index+=stride;
			}
		}
	}
	
	public void putIntoBuffer(ByteBuffer buffer, int index, JsonElement element)
	{
		switch(this)
		{
			case BYTE:
				buffer.put(index, element.getAsByte());
				break;
			case SHORT:
				buffer.putShort(index, element.getAsShort());
				break;
			case INT:
				buffer.putInt(index, element.getAsInt());
				break;
			case LONG:
				buffer.putLong(index, element.getAsLong());
				break;
			case FLOAT:
				buffer.putFloat(index, element.getAsFloat());
				break;
			case DOUBLE:
				buffer.putDouble(index, element.getAsDouble());
				break;
		}
	}
	
	public static DataType byID(String id)
	{
		return BY_ID.get(id);
	}
	
	static
	{
		for(DataType type : values())
		{
			BY_ID.put(type.getType(), type);
		}
	}
}