package fitnesse.wiki.fs;

import java.io.*;
import java.util.Arrays;
import java.util.Collection;

import fitnesse.util.Clock;
import util.FileUtil;

public class DiskFileSystem implements FileSystem {

  private FilenameFilter filenameFilter = new FilenameFilter() {
    private Collection skippedFileNames = Arrays.asList("CVS", "RCS");

    @Override
    public boolean accept(final File dir, final String name) {
      return !(new File(dir, name).isHidden() || skippedFileNames.contains(name));
    }
  };

  @Override
  public void makeFile(File file, String content) throws IOException {
    FileUtil.createFile(file, content);
  }

  @Override
  public void makeFile(File file, InputStream content) throws IOException {
    FileUtil.createFile(file, content);
  }

  @Override
  public void makeDirectory(File path) throws IOException {
    if (!path.mkdirs()) {
      throw new IOException("make directory failed: " + path.getAbsolutePath());
    }
  }

  @Override
  public boolean exists(File file) {
    return file.exists();
  }

  @Override
  public String[] list(File path) {
    return path.isDirectory() ? path.list(filenameFilter) : new String[]{};
  }

  @Override
  public String getContent(File file) throws IOException {
    return FileUtil.getFileContent(file);
  }

  @Override
  public InputStream getInputStream(File file) throws IOException {
    return new BufferedInputStream(new FileInputStream(file));
  }

  @Override
  public void delete(File fileToBeDeleted) throws IOException {
    if (fileToBeDeleted.isDirectory()) {
      FileUtil.deleteFileSystemDirectory(fileToBeDeleted);
    } else {
      FileUtil.deleteFile(fileToBeDeleted);
    }
  }

  @Override
  public long lastModified(File file) {
    return file.exists() ? file.lastModified() : Clock.currentTimeInMillis();
  }

  @Override
  public void rename(File file, File originalFile) throws IOException {
    if (!originalFile.renameTo(file)) {
      throw new IOException("file rename failed: " + originalFile.getAbsolutePath());
    }
  }

  @Override
  public boolean isDirectory(File file) {
    return file.isDirectory();
  }
}