package me.lethunderhawk.profile.config;

import me.lethunderhawk.profile.config.abstraction.ConfigFactory;
import me.lethunderhawk.profile.config.abstraction.PersistentConfig;
import org.bukkit.configuration.file.YamlConfiguration;
import org.bukkit.plugin.java.JavaPlugin;

import java.io.File;
import java.io.IOException;
import java.util.function.Supplier;

public class ConfigLoader {

    private final File folder;
    private final JavaPlugin main;

    public ConfigLoader(JavaPlugin plugin) {
        this.main = plugin;
        this.folder = main.getDataFolder();

        if (!folder.exists()) {
            folder.mkdirs();
        }
    }

    public <T extends PersistentConfig> T loadConfig(
            Class<T> type,
            String fileName,
            ConfigFactory<T> factory,
            Supplier<T> defaultSupplier
    ) {

        File file = getFile(fileName);

        // If file does not exist → create default config
        if (!file.exists()) {

            try {
                file.getParentFile().mkdirs();
                file.createNewFile();
            } catch (IOException e) {
                throw new RuntimeException("Could not create config file: " + fileName, e);
            }

            T defaultConfig = defaultSupplier.get();
            save(defaultConfig);

            main.getLogger().info("[ProfileConfig] Created new profile " + fileName + ".yml");

            return defaultConfig;
        }

        YamlConfiguration cfg = YamlConfiguration.loadConfiguration(file);

        // If file exists but is empty → also create default
        if (cfg.getKeys(false).isEmpty()) {

            T defaultConfig = defaultSupplier.get();
            save(defaultConfig);

            main.getLogger().info("[ProfileConfig] Initialized empty profile " + fileName + ".yml");

            return defaultConfig;
        }

        return factory.deserialize(cfg);
    }


    public void save(PersistentConfig persistentConfig) {
        File file = getFile(persistentConfig.getFileName());
        YamlConfiguration cfg = new YamlConfiguration();

        persistentConfig.serialize(cfg);

        try {
            cfg.save(file);
        } catch (IOException e) {
            throw new RuntimeException("Could not save config file: " + file.getName(), e);
        }
    }

    private File getFile(String name) {
        return new File(folder, name + ".yml");
    }
}