package io.gitlab.jfronny.respackopts;

import io.gitlab.jfronny.gson.*;
import io.gitlab.jfronny.muscript.compiler.expr.*;
import io.gitlab.jfronny.respackopts.filters.*;
import io.gitlab.jfronny.respackopts.gson.*;
import io.gitlab.jfronny.respackopts.gson.entry.*;
import io.gitlab.jfronny.respackopts.integration.*;
import io.gitlab.jfronny.respackopts.model.*;
import io.gitlab.jfronny.respackopts.model.tree.*;
import io.gitlab.jfronny.respackopts.util.*;
import net.fabricmc.api.*;
import net.fabricmc.loader.api.*;
import net.minecraft.client.*;
import net.minecraft.server.integrated.*;
import net.minecraft.util.*;
import org.slf4j.*;

import java.io.*;
import java.nio.file.*;
import java.util.*;
import java.util.concurrent.*;

@Environment(EnvType.CLIENT)
public class Respackopts implements ClientModInitializer {
    public static final Integer META_VERSION = 8;
    public static final String FILE_EXTENSION = ".rpo";
    public static final Gson GSON;

    public static final String ID = "respackopts";
    public static final Logger LOGGER = LoggerFactory.getLogger(ID);
    public static final Identifier CONF_ID = new Identifier(ID, "conf.json");
    public static final Set<Runnable> SAVE_ACTIONS = new HashSet<>();
    public static final GuiFactory GUI_FACTORY = new GuiFactory();

    public static boolean forcePackReload = false;
    public static Path FALLBACK_CONF_DIR;
    public static ConfigFile CONFIG;
    public static final Identifier RPO_SHADER_ID = new Identifier(Respackopts.ID, "config_supplier");
    private static String shaderImportSource;

    static {
        GSON = new GsonBuilder()
                .registerTypeAdapter(ConfigEnumEntry.class, new EnumEntrySerializer())
                .registerTypeAdapter(ConfigNumericEntry.class, new NumericEntrySerializer())
                .registerTypeAdapter(ConfigBooleanEntry.class, new BooleanEntrySerializer())
                .registerTypeAdapter(ConfigBranch.class, new ConfigBranchSerializer())
                .registerTypeAdapter(Expr.class, new ExprDeserializer())
                .registerTypeAdapter(StringExpr.class, new StringExprDeserializer())
                .registerTypeAdapter(BoolExpr.class, new BoolExprDeserializer())
                .registerTypeAdapter(Condition.class, new ConditionDeserializer())
                .setLenient()
                .setPrettyPrinting()
                .create();
        try {
            FALLBACK_CONF_DIR = FabricLoader.getInstance().getConfigDir().resolve(ID);
            CONFIG = ConfigFile.load();
        } catch (Throwable e) {
            LOGGER.error("Could not resolve config directory", e);
        }
    }

    @Override
    public void onInitializeClient() {
        try {
            Files.createDirectories(FALLBACK_CONF_DIR);
        } catch (IOException e) {
            LOGGER.error("Could not initialize config directory", e);
        }
        if (CONFIG.debugLogs)
            SAVE_ACTIONS.add(() -> LOGGER.info("Save"));
        SAVE_ACTIONS.add(() -> {
            if (CONFIG.debugLogs)
                LOGGER.info("Generating shader code");
            StringBuilder sb = new StringBuilder();
            sb.append("#ifndef respackopts_loaded");
            sb.append("\n#define respackopts_loaded");
            MetaCache.forEach((key, state) -> state.configBranch().buildShader(sb, sanitizeString(state.packId())));
            sb.append("\n#endif");
            shaderImportSource = sb.toString();
        });
        DirFilterEventImpl.init();
        FileFilterEventImpl.init();
        if (CONFIG.debugCommands)
            RpoCommand.register();
        if (FabricLoader.getInstance().isModLoaded("frex")) {
            FrexCompat.onInitializeFrex();
        }
    }

    public static String sanitizeString(String s) {
        // This trims whitespace/underscores and removes non-alphabetical or underscore characters

        // ^ = start of string
        // $ = end of string
        // * = zero or more times
        // [\\s_] = whitespace or underscores
        // | = or
        // [^a-zA-Z_] = not character or underscore
        return s.replaceAll("[^a-zA-Z_]|^[\\s_]*|[\\s_]*$", "");
    }

    public static CompletableFuture<Void> forceReloadResources() {
        if (CONFIG.debugLogs)
            LOGGER.info("Forcing resource reload");
        return CompletableFuture.allOf(MinecraftClient.getInstance().reloadResources(),
                reloadData());
    }

    public static CompletableFuture<Void> reloadData() {
        IntegratedServer is = MinecraftClient.getInstance().getServer();
        if (is != null) {
            is.getDataPackManager().scanPacks();
            return is.reloadResources(is.getDataPackManager().getEnabledNames());
        }
        return CompletableFuture.completedFuture(null);
    }

    public static String getShaderImportSource() {
        if (shaderImportSource == null) {
            Respackopts.LOGGER.error("Shader import source is null");
            return "";
        }
        return shaderImportSource;
    }
}