package com.cimeyclust.ezcheat.client;

import com.cimeyclust.ezcheat.Ezcheat;
import com.cimeyclust.ezcheat.EzcheatPayload;
import net.fabricmc.api.ClientModInitializer;
import net.fabricmc.fabric.api.client.networking.v1.ClientPlayConnectionEvents;
import net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking;
import net.fabricmc.fabric.api.networking.v1.PayloadTypeRegistry;
import net.fabricmc.loader.api.FabricLoader;
import org.apache.commons.codec.digest.DigestUtils;

import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.HashMap;
import java.util.Map;

public class EzcheatClient implements ClientModInitializer {

    @Override
    public void onInitializeClient() {
        ClientPlayConnectionEvents.JOIN.register((handler, sender, client) -> {
            if (!client.isInSingleplayer()) {
                this.sendHashes();
            }
        });
    }

    /** Called client‑side to compute & send hashes */
    private void sendHashes() {
        // gather mod files
        Path modsDir = FabricLoader.getInstance()
                .getGameDir()
                .resolve("mods")
                .toAbsolutePath();

        Map<String, String> hashes = new HashMap<>();
        for (var mod : FabricLoader.getInstance().getAllMods()) {
            try {
                Path path = null;
                var paths = mod.getOrigin().getPaths();
                for (Path p : paths) {
                    if (Files.isRegularFile(p)) {
                        path = p;
                        break;
                    }
                }

                if (path == null) {
                    Ezcheat.LOGGER.debug("Skipping mod {}: No valid path", mod.getMetadata().getId());
                    continue;
                }

                if (path.startsWith(modsDir)) {
                    try (InputStream in = Files.newInputStream(path)) {
                        hashes.put(mod.getMetadata().getId(), DigestUtils.sha256Hex(in));
                    }
                }
            } catch (IOException e) {
                Ezcheat.LOGGER.warn("Could not hash {}: {}", mod.getMetadata().getId(), e.getMessage());
            }
        }

        EzcheatPayload payload = new EzcheatPayload(hashes);
        ClientPlayNetworking.send(payload);
    }
}