package com.example.examplemod;

import net.minecraftforge.fml.common.Mod;
import net.minecraftforge.fml.common.Mod.EventHandler;
import net.minecraftforge.fml.common.event.FMLInitializationEvent;
import net.minecraftforge.fml.common.event.FMLInterModComms;

import java.util.function.Function;

@Mod(modid = ExampleMod.MODID, version = ExampleMod.VERSION)
public class ExampleMod
{
    public static final String MODID = "examplemod";
    public static final String VERSION = "1.0";

    @EventHandler
    public void init(FMLInitializationEvent event)
    {
        FMLInterModComms.sendFunctionMessage("modWithApi", "requestAPI", "com.example.examplemod.ExampleMod$FunctionCallback");
    }

    static ApiInterface modInterface;

    public static class FunctionCallback implements Function<ApiInterface, Void> {

        @Override
        public Void apply(ApiInterface apiInterface) {
            modInterface = apiInterface;
            return null;
        }
    }

    // in YOUR mod
    public interface ApiInterface {



    }

    @Mod(modid = "modWithApi")
    public static class MyMod {

        @EventHandler
        public void modComms(FMLInterModComms.IMCEvent event) {
            for (FMLInterModComms.IMCMessage message : event.getMessages()) {
                if (message.isFunctionMessage()) {
                    message.getFunctionValue(ApiInterface.class, Void.class).get().apply(new MyImpl());
                }
            }
        }

    }

}