/**
    *
    * Copyright (C) 2011 Cloud Conscious, LLC. <info@cloudconscious.com>
    *
    * ====================================================================
    * 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 org.jclouds.compute.options;
  
  import static com.google.common.base.Preconditions.checkArgument;
  import static com.google.common.base.Preconditions.checkNotNull;
  
  import org.jclouds.domain.Credentials;
  
  /**
   * Enables additional options for running a script.
   * 
   * @author Oleksiy Yarmula
   */
  public class RunScriptOptions {
  
     /**
      * Default options. The default settings are:
      * <ul>
      * <li>override the credentials with ones supplied in call to
      * {@link org.jclouds.compute.ComputeService#runScriptOnNodesWithTag}</li>
      * <li>run the script as root (versus running with current privileges)</li>
      * </ul>
      */
     public static final RunScriptOptions NONE = new ImmutableRunScriptOptions(new RunScriptOptions());
  
     public static class ImmutableRunScriptOptions extends RunScriptOptions {
        private final RunScriptOptions delegate;
  
        public ImmutableRunScriptOptions(RunScriptOptions delegate) {
           this.delegate = delegate;
        }
  
        @Override
        public String toString() {
           return delegate.toString();
        }
  
        @Override
        public Credentials getOverridingCredentials() {
           return delegate.getOverridingCredentials();
  
        }
  
        @Override
        public boolean shouldRunAsRoot() {
           return delegate.shouldRunAsRoot();
  
        }
  
        @Override
        public RunScriptOptions runAsRoot(boolean runAsRoot) {
           throw new IllegalArgumentException("runAsRoot is immutable");
        }
  
        @Override
        public boolean shouldBlockOnComplete() {
           return delegate.shouldBlockOnComplete();
  
        }
  
        @Override
        public RunScriptOptions blockOnComplete(boolean blockOnComplete) {
           throw new IllegalArgumentException("blockOnComplete is immutable");
        }
  
        @Override
        public RunScriptOptions overrideLoginUserWith(String loginUser) {
           throw new IllegalArgumentException("loginUser is immutable");
        }
  
        @Override
        public RunScriptOptions overrideLoginCredentialWith(String loginCredential) {
           throw new IllegalArgumentException("loginCredential is immutable");
        }
  
        @Override
        public RunScriptOptions wrapInInitScript(boolean wrapInInitScript) {
           throw new IllegalArgumentException("wrapInInitScript is immutable");
        }
  
        @Override
        public RunScriptOptions overrideCredentialsWith(Credentials overridingCredentials) {
          throw new IllegalArgumentException("overridingCredentials is immutable");
       }
 
       @Override
       public String getTaskName() {
          return delegate.getTaskName();
       }
 
       @Override
       public RunScriptOptions nameTask(String name) {
          throw new IllegalArgumentException("taskName is immutable");
       }
 
       @Override
       public RunScriptOptions blockOnPort(int port, int seconds) {
          throw new IllegalArgumentException("port, seconds are immutable");
       }
 
       @Override
       public int getPort() {
          return delegate.getPort();
       }
 
       @Override
       public int getSeconds() {
          return delegate.getSeconds();
       }
    }
 
    protected int port = -1;
    protected int seconds = -1;
    protected String taskName;
    protected Credentials overridingCredentials;
    protected boolean runAsRoot = true;
    protected boolean blockOnComplete = true;
    protected boolean wrapInInitScript = true;
 
    public RunScriptOptions overrideCredentialsWith(Credentials overridingCredentials) {
       checkNotNull(overridingCredentials, "overridingCredentials");
       this.overridingCredentials = overridingCredentials;
       return this;
    }
 
    public RunScriptOptions overrideLoginUserWith(String loginUser) {
       checkNotNull(loginUser, "loginUser");
       org.jclouds.domain.Credentials.Builder<? extends Credentials> builder = overridingCredentials != null ? overridingCredentials
             .toBuilder() : new Credentials.Builder<Credentials>();
       this.overridingCredentials = builder.identity(loginUser).build();
       return this;
    }
 
    public RunScriptOptions overrideLoginCredentialWith(String loginCredential) {
       checkNotNull(loginCredential, "loginCredential");
       org.jclouds.domain.Credentials.Builder<? extends Credentials> builder = overridingCredentials != null ? overridingCredentials
             .toBuilder() : new Credentials.Builder<Credentials>();
       this.overridingCredentials = builder.credential(loginCredential).build();
       return this;
    }
 
    /**
     * @return What to call the task relating to this script; default
     *         {@code jclouds-script-timestamp} where timestamp is millis since epoch
     * 
     */
    public RunScriptOptions nameTask(String name) {
       this.taskName = name;
       return this;
    }
 
    public RunScriptOptions runAsRoot(boolean runAsRoot) {
       this.runAsRoot = runAsRoot;
       return this;
    }
 
    /**
     * default true
     * <p/>
     * 
     * @param wrapInInitScript
     *           if the command is long-running, use this option to ensure it is wrapInInitScripted
     *           properly. (ex. have jclouds wrap it an init script, nohup, etc)
     * @return
     */
    public RunScriptOptions wrapInInitScript(boolean wrapInInitScript) {
       this.wrapInInitScript = wrapInInitScript;
       return this;
    }
 
    public RunScriptOptions blockOnComplete(boolean blockOnComplete) {
       this.blockOnComplete = blockOnComplete;
       return this;
    }
 
    /**
     * When the node is started, wait until the following port is active
     */
    public RunScriptOptions blockOnPort(int port, int seconds) {
       checkArgument(port > 0 && port < 65536, "port must be a positive integer < 65535");
       checkArgument(seconds > 0, "seconds must be a positive integer");
       this.port = port;
       this.seconds = seconds;
       return this;
    }
 
    public String getTaskName() {
       return taskName;
    }
 
    public int getPort() {
       return port;
    }
 
    public int getSeconds() {
       return seconds;
    }
 
    /**
     * Whether to override the credentials with ones supplied in call to
     * {@link org.jclouds.compute.ComputeService#runScriptOnNodesWithTag}. By default, true.
     * 
     * @return value
     */
    public Credentials getOverridingCredentials() {
       return overridingCredentials;
    }
 
    /**
     * Whether to run the script as root (or run with current privileges). By default, true.
     * 
     * @return value
     */
    public boolean shouldRunAsRoot() {
       return runAsRoot;
    }
 
    /**
     * Whether to wait until the script has completed. By default, true.
     * 
     * @return value
     */
    public boolean shouldBlockOnComplete() {
       return blockOnComplete;
    }
 
    /**
     * Whether to wait until the script has completed. By default, true.
     * 
     * @return value
     */
    public boolean shouldWrapInInitScript() {
       return wrapInInitScript;
    }
 
    public static class Builder {
 
       public static RunScriptOptions nameTask(String name) {
          RunScriptOptions options = new RunScriptOptions();
          return options.nameTask(name);
       }
 
       public static RunScriptOptions overrideLoginUserWith(String user) {
          RunScriptOptions options = new RunScriptOptions();
          return options.overrideLoginUserWith(user);
       }
 
       public static RunScriptOptions overrideLoginCredentialWith(String credential) {
          RunScriptOptions options = new RunScriptOptions();
          return options.overrideLoginCredentialWith(credential);
       }
 
       public static RunScriptOptions overrideCredentialsWith(Credentials credentials) {
          RunScriptOptions options = new RunScriptOptions();
          return options.overrideCredentialsWith(credentials);
       }
 
       public static RunScriptOptions runAsRoot(boolean value) {
          RunScriptOptions options = new RunScriptOptions();
          return options.runAsRoot(value);
       }
 
       public static RunScriptOptions blockOnComplete(boolean value) {
          RunScriptOptions options = new RunScriptOptions();
          return options.blockOnComplete(value);
       }
 
       public static RunScriptOptions wrapInInitScript(boolean value) {
          RunScriptOptions options = new RunScriptOptions();
          return options.wrapInInitScript(value);
       }
 
       public static RunScriptOptions blockOnPort(int port, int seconds) {
          RunScriptOptions options = new RunScriptOptions();
          return options.blockOnPort(port, seconds);
       }
 
    }
 
    @Override
    public String toString() {
       return "[overridingCredentials=" + (overridingCredentials != null) + ", port:seconds=" + port + ":" + seconds
             + ", runAsRoot=" + runAsRoot + ", blockOnComplete=" + blockOnComplete + ", wrapInInitScript="
             + wrapInInitScript + "]";
    }
 
 }