package Common;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.lang.reflect.Modifier;

public class JsonObject
{
    private static Gson gson = new GsonBuilder().excludeFieldsWithModifiers(Modifier.FINAL).create();

    protected JsonObject()
    {
        try
        {
            this.getClass().getConstructor();
        }
        catch (Exception e)
        {
            throw new RuntimeException(this.getClass().getName() + " must have an empty default constructor to extend " + JsonObject.class.getName());
        }
    }

    public String getName()
    {
        return getName(this.getClass());
    }

    public String toJsonString()
    {
        return gson.toJson(this);
    }

    public static void setDefaultGson(Gson gson)
    {
        JsonObject.gson = gson;
    }

    private static String getName(Class c)
    {
        return c.getSimpleName();
    }


    public static Gson getDefaultGson()
    {
        return gson;
    }

    public static  T load(String directory, Class jsonClass) throws IOException
    {
        return load(new File(directory), jsonClass);
    }

    public static  T load(File directory, Class jsonClass) throws IOException
    {
        return gson.fromJson(new FileReader(new File(directory, getName(jsonClass))), jsonClass);
    }
}