package io.gitlab.jfronny.respackopts;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import io.gitlab.jfronny.respackopts.data.entry.*;
import io.gitlab.jfronny.respackopts.filters.FilterProvider;
import io.gitlab.jfronny.respackopts.gson.BooleanEntrySerializer;
import io.gitlab.jfronny.respackopts.gson.ConfigBranchSerializer;
import io.gitlab.jfronny.respackopts.gson.EnumEntrySerializer;
import io.gitlab.jfronny.respackopts.gson.NumericEntrySerializer;
import net.fabricmc.api.ClientModInitializer;
import net.fabricmc.api.EnvType;
import net.fabricmc.api.Environment;
import net.fabricmc.loader.api.FabricLoader;
import net.minecraft.util.Identifier;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import java.io.IOException;
import java.io.Reader;
import java.io.Writer;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

@Environment(EnvType.CLIENT)
public class Respackopts implements ClientModInitializer {
    public static final Integer META_VERSION = 3;
    public static final String ID = "respackopts";
    public static final Identifier CONF_ID = new Identifier(ID, "conf.json");
    public static final Logger LOGGER = LogManager.getFormatterLogger(ID);
    public static final String FILE_EXTENSION = ".rpo";
    public static final Set<Runnable> SAVE_ACTIONS = new HashSet<>();
    public static Path CONF_DIR;

    public static final Map<String, ConfigBranch> CONFIG_BRANCH = new HashMap<>();
    public static final Map<String, String> NAME_LOOKUP = new HashMap<>();

    public static final Gson GSON;
    public static GuiFactory factory = new GuiFactory();
    public static boolean forceRespackReload = false;
    
    static {
        GSON = new GsonBuilder()
                .registerTypeAdapter(ConfigEnumEntry.class, new EnumEntrySerializer())
                .registerTypeAdapter(ConfigNumericEntry.class, new NumericEntrySerializer())
                .registerTypeAdapter(ConfigBooleanEntry.class, new BooleanEntrySerializer())
                .registerTypeAdapter(ConfigBranch.class, new ConfigBranchSerializer())
                .setPrettyPrinting()
                .create();
        try {
            CONF_DIR = FabricLoader.getInstance().getConfigDir().resolve(ID);
        } catch (Throwable e) {
            LOGGER.error("Could not resolve config directory", e);
        }
    }

    @Override
    public void onInitializeClient() {
        try {
            Files.createDirectories(CONF_DIR);
        } catch (IOException e) {
            Respackopts.LOGGER.error("Could not initialize config directory", e);
        }
        if (FabricLoader.getInstance().isDevelopmentEnvironment())
            SAVE_ACTIONS.add(() -> LOGGER.info("Save"));
        FilterProvider.init();
    }

    public static void save() {
        for (Map.Entry<String, ConfigBranch> e : CONFIG_BRANCH.entrySet()) {
            try (Writer writer = Files.newBufferedWriter(CONF_DIR.resolve(e.getKey() + ".json"))) {
                GSON.toJson(e.getValue(), writer);
                writer.flush();
            } catch (IOException ex) {
                Respackopts.LOGGER.error("Could not save config", ex);
            }
        }
        for (Runnable action : SAVE_ACTIONS) {
            action.run();
        }
    }

    public static void load(String id) {
        Path q = CONF_DIR.resolve(id + ".json");
        if (Files.exists(q)) {
            try (Reader reader = Files.newBufferedReader(q)) {
                ConfigBranch b = GSON.fromJson(reader, ConfigBranch.class);
                if (CONFIG_BRANCH.containsKey(id))
                    CONFIG_BRANCH.get(id).sync(b, SyncMode.CONF_LOAD);
            } catch (IOException e) {
                LOGGER.error("Failed to load " + id, e);
            }
        }
    }

    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_]*$", "");
    }
}