package org.gcube.informationsystem.types;

import java.lang.reflect.Field;
import java.util.List;

import org.gcube.informationsystem.base.reference.Element;
import org.gcube.informationsystem.types.impl.TypeDefinitionImpl;
import org.gcube.informationsystem.types.reference.TypeDefinition;
import org.gcube.informationsystem.utils.ISMapper;

/**
 * @author Luca Frosini (ISTI - CNR)
 */
public class TypeBinder {

	private final static String NAME = "NAME";
	
	public static String serializeTypeDefinition(TypeDefinition typeDefinition) throws Exception{
		String json = ISMapper.marshal(typeDefinition);
		return json;
	}
	
	public static <ISM extends Element> String serializeType(Class<ISM> type) throws Exception{
		TypeDefinition typeDefinition = createTypeDefinition(type);
		return ISMapper.marshal(typeDefinition);
	}

	public static TypeDefinition deserializeTypeDefinition(String json) throws Exception{
		TypeDefinition readValue = ISMapper.unmarshal(TypeDefinition.class, json);
		return readValue;
	}
	
	public static <ISM extends Element> String serializeTypeDefinitions(List<TypeDefinition> typeDefinitions) throws Exception{
		String json = ISMapper.marshal(typeDefinitions);
		return json;
		
	}
	
	public static List<TypeDefinition> deserializeTypeDefinitions(String json) throws Exception{
		List<TypeDefinition> list = ISMapper.unmarshalList(TypeDefinition.class, json);
		return list;
	}
	
	public static <ISM extends Element> TypeDefinition createTypeDefinition(Class<ISM> clz) {
		TypeDefinition typeDefinition = TypeDefinitionImpl.getInstance(clz);
		return typeDefinition;
	}
	
	public static String getType(Class<? extends Element> clz){
		return getStaticStringFieldByName(clz, NAME, clz.getSimpleName());
	}
	
	public static String getStaticStringFieldByName(Class<? extends Element> type, String fieldName, String defaultValue){
		Field field;
		try {
			field = type.getDeclaredField(fieldName);
			field.setAccessible(true);
			return (String) field.get(null);
		} catch (NoSuchFieldException | SecurityException | IllegalArgumentException | IllegalAccessException e) {
			return defaultValue;
		}
	}
}