package net.minecraft.server.packs.repository;

import com.google.common.annotations.VisibleForTesting;
import java.nio.file.Path;
import java.util.Optional;
import net.minecraft.SharedConstants;
import net.minecraft.network.chat.Component;
import net.minecraft.resources.ResourceLocation;
import net.minecraft.server.packs.BuiltInMetadata;
import net.minecraft.server.packs.FeatureFlagsMetadataSection;
import net.minecraft.server.packs.PackLocationInfo;
import net.minecraft.server.packs.PackResources;
import net.minecraft.server.packs.PackSelectionConfig;
import net.minecraft.server.packs.PackType;
import net.minecraft.server.packs.VanillaPackResources;
import net.minecraft.server.packs.VanillaPackResourcesBuilder;
import net.minecraft.server.packs.metadata.pack.PackMetadataSection;
import net.minecraft.server.packs.repository.Pack.Position;
import net.minecraft.server.packs.repository.Pack.ResourcesSupplier;
import net.minecraft.world.flag.FeatureFlags;
import net.minecraft.world.level.storage.LevelResource;
import net.minecraft.world.level.storage.LevelStorageSource;
import net.minecraft.world.level.validation.DirectoryValidator;
import org.jetbrains.annotations.Nullable;

public class ServerPacksSource extends BuiltInPackSource {
	private static final PackMetadataSection VERSION_METADATA_SECTION = new PackMetadataSection(
		Component.translatable("dataPack.vanilla.description"), SharedConstants.getCurrentVersion().getPackVersion(PackType.SERVER_DATA), Optional.empty()
	);
	private static final FeatureFlagsMetadataSection FEATURE_FLAGS_METADATA_SECTION = new FeatureFlagsMetadataSection(FeatureFlags.DEFAULT_FLAGS);
	private static final BuiltInMetadata BUILT_IN_METADATA = BuiltInMetadata.of(
		PackMetadataSection.TYPE, VERSION_METADATA_SECTION, FeatureFlagsMetadataSection.TYPE, FEATURE_FLAGS_METADATA_SECTION
	);
	private static final PackLocationInfo VANILLA_PACK_INFO = new PackLocationInfo(
		"vanilla", Component.translatable("dataPack.vanilla.name"), PackSource.BUILT_IN, Optional.of(CORE_PACK_INFO)
	);
	private static final PackSelectionConfig VANILLA_SELECTION_CONFIG = new PackSelectionConfig(false, Position.BOTTOM, false);
	private static final PackSelectionConfig FEATURE_SELECTION_CONFIG = new PackSelectionConfig(false, Position.TOP, false);
	private static final ResourceLocation PACKS_DIR = ResourceLocation.withDefaultNamespace("datapacks");

	public ServerPacksSource(DirectoryValidator validator) {
		super(PackType.SERVER_DATA, createVanillaPackSource(), PACKS_DIR, validator);
	}

	private static PackLocationInfo createBuiltInPackLocation(String id, Component title) {
		return new PackLocationInfo(id, title, PackSource.FEATURE, Optional.of(KnownPack.vanilla(id)));
	}

	@VisibleForTesting
	public static VanillaPackResources createVanillaPackSource() {
		return new VanillaPackResourcesBuilder()
			.setMetadata(BUILT_IN_METADATA)
			.exposeNamespace("minecraft")
			.applyDevelopmentConfig()
			.pushJarResources()
			.build(VANILLA_PACK_INFO);
	}

	@Override
	protected Component getPackTitle(String id) {
		return Component.literal(id);
	}

	@Nullable
	@Override
	protected Pack createVanillaPack(PackResources resources) {
		return Pack.readMetaAndCreate(VANILLA_PACK_INFO, fixedResources(resources), PackType.SERVER_DATA, VANILLA_SELECTION_CONFIG);
	}

	@Nullable
	@Override
	protected Pack createBuiltinPack(String id, ResourcesSupplier resources, Component title) {
		return Pack.readMetaAndCreate(createBuiltInPackLocation(id, title), resources, PackType.SERVER_DATA, FEATURE_SELECTION_CONFIG);
	}

	public static PackRepository createPackRepository(Path folder, DirectoryValidator validator) {
		return new PackRepository(new ServerPacksSource(validator), new FolderRepositorySource(folder, PackType.SERVER_DATA, PackSource.WORLD, validator));
	}

	public static PackRepository createVanillaTrustedRepository() {
		return new PackRepository(new ServerPacksSource(new DirectoryValidator(path -> true)));
	}

	public static PackRepository createPackRepository(LevelStorageSource.LevelStorageAccess level) {
		return createPackRepository(level.getLevelPath(LevelResource.DATAPACK_DIR), level.parent().getWorldDirValidator());
	}
}