package me.lortseam.completeconfig.io;

import lombok.EqualsAndHashCode;
import lombok.Getter;
import lombok.ToString;
import lombok.extern.log4j.Log4j2;
import me.lortseam.completeconfig.CompleteConfig;
import me.lortseam.completeconfig.data.Config;
import me.lortseam.completeconfig.extensions.CompleteConfigExtension;
import net.fabricmc.loader.api.FabricLoader;
import org.apache.commons.lang3.ArrayUtils;
import org.spongepowered.configurate.CommentedConfigurationNode;
import org.spongepowered.configurate.ConfigurateException;
import org.spongepowered.configurate.hocon.HoconConfigurationLoader;
import org.spongepowered.configurate.serialize.TypeSerializerCollection;

import java.nio.file.Path;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;

@Log4j2
@EqualsAndHashCode(onlyExplicitlyIncluded = true)
@ToString(onlyExplicitlyIncluded = true)
public final class ConfigSource {

    private static final TypeSerializerCollection GLOBAL_TYPE_SERIALIZERS = TypeSerializerCollection.builder()
            .registerExact(TextColorSerializer.INSTANCE)
            .build();
    private static final Set<ConfigSource> sources = new HashSet<>();

    @EqualsAndHashCode.Include
    @ToString.Include
    @Getter
    private final String modID;
    @EqualsAndHashCode.Include
    @ToString.Include
    private final String[] branch;
    private final HoconConfigurationLoader loader;

    public ConfigSource(String modID, String[] branch) {
        this.modID = modID;
        this.branch = branch;
        if (!sources.add(this)) {
            throw new IllegalArgumentException("A config of the mod " + modID + " with the specified branch " + Arrays.toString(branch) + " already exists!");
        }
        Path path = FabricLoader.getInstance().getConfigDir();
        String[] subPath = ArrayUtils.add(branch, 0, modID);
        subPath[subPath.length - 1] = subPath[subPath.length - 1] + ".conf";
        for (String child : subPath) {
            path = path.resolve(child);
        }
        loader = HoconConfigurationLoader.builder()
                .path(path)
                .defaultOptions(options -> options.serializers(builder -> {
                    builder.registerAll(GLOBAL_TYPE_SERIALIZERS);
                    CompleteConfig.getExtensions().stream().map(CompleteConfigExtension::getTypeSerializers).filter(Objects::nonNull).forEach(builder::registerAll);
                }))
                .build();
    }

    public void load(Config config) {
        try {
            CommentedConfigurationNode root = loader.load();
            if (!root.virtual()) {
                config.apply(root);
            }
        } catch (ConfigurateException e) {
            logger.error("[CompleteConfig] Failed to load config from file!", e);
        }
        save(config);
    }

    public void save(Config config) {
        CommentedConfigurationNode root = loader.createNode();
        config.fetch(root);
        try {
            loader.save(root);
        } catch (ConfigurateException e) {
            logger.error("[CompleteConfig] Failed to save config to file!", e);
        }
    }

}