package de.mlessmann.certassist;

import java.io.IOException;
import java.nio.file.FileVisitResult;
import java.nio.file.FileVisitor;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.attribute.BasicFileAttributes;
import lombok.extern.slf4j.Slf4j;
import org.springframework.lang.NonNull;

@Slf4j
public class DeleteRecursiveFileVisitor implements FileVisitor<Path> {

    @NonNull
    @Override
    public FileVisitResult preVisitDirectory(Path dir, @NonNull BasicFileAttributes attrs) throws IOException {
        return FileVisitResult.CONTINUE;
    }

    @NonNull
    @Override
    public FileVisitResult visitFile(Path file, @NonNull BasicFileAttributes attrs) throws IOException {
        log.trace("Deleting file {}", file);
        Files.delete(file);
        return FileVisitResult.CONTINUE;
    }

    @NonNull
    @Override
    public FileVisitResult visitFileFailed(Path file, @NonNull IOException exc) throws IOException {
        log.error("Could not delete file {}", file, exc);
        throw exc;
    }

    @NonNull
    @Override
    public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
        log.trace("Deleting directory {}", dir);
        Files.delete(dir);
        return FileVisitResult.CONTINUE;
    }
}