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/*
 * Copyright 2013 Objectos, Fábrica de Software LTDA.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package br.com.objectos.rio.core.os;

import java.util.List;

import br.com.objectos.way.base.io.HasStdout;
import br.com.objectos.way.base.io.Stdout;
import br.com.objectos.way.core.io.Directory;

import com.google.common.collect.ImmutableList;

/**
 * @author [email protected] (Marcio Endo)
 */
public class ChrootMount implements HasStdout {

  private final Directory dir;
  private final List points;

  public ChrootMount(Directory dir, List points) {
    this.dir = dir;
    this.points = points;
  }

  public static ChrootMountAt at(Directory dir) {
    return new ChrootMountAt(dir);
  }

  public ChrootUmount umount() {
    UmountPoint u0 = ChrootUmount.at(dir)
        .dir("/dev/shm")
        .lazy()
        .exec();
    UmountPoint u1 = ChrootUmount.at(dir)
        .dir("/dev/pts")
        .lazy()
        .exec();
    UmountPoint u2 = ChrootUmount.at(dir)
        .dir("/dev")
        .lazy()
        .exec();
    UmountPoint u3 = ChrootUmount.at(dir)
        .dir("/sys")
        .lazy()
        .exec();
    UmountPoint u4 = ChrootUmount.at(dir)
        .dir("/proc")
        .lazy()
        .exec();

    List umounts = ImmutableList.of(u0, u1, u2, u3, u4);
    return new ChrootUmount(this, umounts);
  }

  @Override
  public List getExceptions() {
    return Stdout.concatExceptions(points);
  }

  @Override
  public List stdout() {
    return Stdout.concatStdout(points);
  }

}