package net.minecraft.util.filefix.access;

import com.mojang.logging.LogUtils;
import java.nio.file.Path;
import java.util.List;
import org.jspecify.annotations.Nullable;
import org.slf4j.Logger;

public class FileAccess<T extends AutoCloseable> implements AutoCloseable {
	private static final Logger LOGGER = LogUtils.getLogger();
	private final FileAccessProvider fileAccessProvider;
	private final FileResourceType<T> type;
	private final FileRelation fileRelation;
	@Nullable
	private List<T> files;

	public FileAccess(final FileAccessProvider fileAccessProvider, final FileResourceType<T> type, final FileRelation fileRelation) {
		this.fileAccessProvider = fileAccessProvider;
		this.type = type;
		this.fileRelation = fileRelation;
	}

	public List<T> get() {
		if (this.files == null) {
			Path baseDirectory = (Path)this.fileAccessProvider.baseDirectory().get();
			if (baseDirectory == null) {
				throw new IllegalStateException("Cannot access world files");
			}

			this.files = this.fileRelation.getPaths(baseDirectory).stream().map(path -> this.type.create(path, this.fileAccessProvider.dataVersion())).toList();
		}

		return this.files;
	}

	public T getOnlyFile() {
		List<T> files = this.get();
		if (files.size() != 1) {
			throw new IllegalStateException("Trying to get only file, but there are " + files.size() + " files");
		} else {
			return (T)files.getFirst();
		}
	}

	public void close() {
		if (this.files != null) {
			for (T file : this.files) {
				try {
					file.close();
				} catch (Exception var4) {
					LOGGER.error("Failed to close file: ", (Throwable)var4);
				}
			}

			this.files = null;
		}
	}
}