package io.trygvis.persistence;

import javax.lang.model.element.Element;
import javax.lang.model.type.TypeMirror;
import java.util.HashMap;
import java.util.Map;

public class GeneratorSupport {

    private final Map<String, TypeHandler> primitiveTypeHandlers = new HashMap<>();
    private final Map<String, TypeHandler> typeHandlers = new HashMap<>();

    {
        typeHandlers.put("java.lang.Integer", new TypeHandler.IntTypeHandler());
        typeHandlers.put("java.lang.Long", new TypeHandler.LongTypeHandler());
        typeHandlers.put("java.util.Date", new TypeHandler.DateTypeHandler());

        primitiveTypeHandlers.putAll(typeHandlers);
    }

    public void addTypeHandler(String type, TypeHandler typeHandler) {
        typeHandlers.put(type, typeHandler);
    }

    public TypeHandler typeHandler(Element element) {
        String type = element.asType().toString();
        TypeHandler typeHandler = typeHandlers.get(type);
        if (typeHandler == null)
            throw new RuntimeException("Unsupported field type: " + type);
        return typeHandler;
    }

    public boolean isPrimitive(TypeMirror type) {
        return primitiveTypeHandlers.containsKey(type.toString());
    }

    public boolean hasTypeHandler(TypeMirror type) {
        return typeHandlers.containsKey(type.toString());
    }
}