package emu.grasscutter.scripts;

import static emu.grasscutter.utils.FileUtils.getScriptPath;

import emu.grasscutter.Grasscutter;
import emu.grasscutter.scripts.data.controller.EntityController;
import java.io.IOException;
import java.nio.file.Files;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import javax.script.Bindings;
import javax.script.CompiledScript;
import lombok.val;

public class EntityControllerScriptManager {
    private static final Map<String, EntityController> gadgetController = new ConcurrentHashMap<>();

    public static void load() {
        cacheGadgetControllers();
    }

    private static void cacheGadgetControllers() {
        try {
            Files.newDirectoryStream(getScriptPath("Gadget/"), "*.lua")
                    .forEach(
                            path -> {
                                val fileName = path.getFileName().toString();

                                if (!fileName.endsWith(".lua")) return;

                                val controllerName = fileName.substring(0, fileName.length() - 4);
                                CompiledScript cs = ScriptLoader.getScript("Gadget/" + fileName);
                                Bindings bindings = ScriptLoader.getEngine().createBindings();
                                if (cs == null) return;

                                try {
                                    cs.eval(bindings);
                                    gadgetController.put(controllerName, new EntityController(cs, bindings));
                                } catch (Throwable e) {
                                    Grasscutter.getLogger()
                                            .error("Error while loading gadget controller: {}", fileName);
                                }
                            });

            Grasscutter.getLogger().info("Loaded {} gadget controllers", gadgetController.size());
        } catch (IOException e) {
            Grasscutter.getLogger().error("Error loading gadget controller luas");
        }
    }

    public static EntityController getGadgetController(String name) {
        return gadgetController.get(name);
    }
}