/**
    * Copyright 2009-2012 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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.codehaus.mojo.properties;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.List;
  import java.util.Properties;
  
  import org.apache.commons.lang.StringUtils;
  import org.apache.maven.plugin.AbstractMojo;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.maven.project.MavenProject;
  import org.jasypt.util.text.BasicTextEncryptor;
  
  /**
   * Inspect project and system properties for any keys ending with <code>endsWith</code>. Any matching properties are assumed to be
   * encrypted. They are decrypted and stored as project properties minus the <code>endsWith</code> suffix. For example, the value for the
   * property "dba.password.encrypted" will be decrypted and stored as "dba.password"
   * 
   * @goal decryptall
   */
  public class DecryptAllPropertiesMojo extends AbstractMojo {
  
  	/**
  	 * @parameter default-value="${project}"
  	 * @required
  	 * @readonly
  	 */
  	private MavenProject project;
  
  	/**
  	 * If true, the plugin will include system properties when decrypting properties
  	 * 
  	 * @parameter default-value="false" expression="${properties.includeSystemProperties}"
  	 */
  	private boolean includeSystemProperties;
  
  	/**
  	 * If true, the plugin will include environment variables when decrypting properties.
  	 * 
  	 * @parameter default-value="false" expression="${properties.includeEnvironmentVariables}"
  	 */
  	private boolean includeEnvironmentVariables;
  
  	/**
  	 * If true, the plugin will emit no logging information
  	 * 
  	 * @parameter expression="${properties.quiet}" default-value="false"
  	 * @required
  	 */
  	private boolean quiet;
  
  	/**
  	 * The pattern for matching properties in need of decryption
  	 * 
  	 * @parameter expression="${properties.endsWith}" default-value=".encrypted"
  	 * @required
  	 */
  	private String endsWith;
  
  	/**
  	 * If true the plain text decrypted values are displayed to the console.
  	 * 
  	 * @parameter expression="${properties.show}" default-value="false"
  	 * @required
  	 */
  	private boolean show;
  
  	/**
  	 * The password for decrypting property values. This same password must have been used to encrypt them.
  	 * 
  	 * @parameter expression="${properties.password}"
  	 * @required
  	 */
  	private String password;
  
  	@Override
  	public void execute() throws MojoExecutionException {
  		BasicTextEncryptor encryptor = new BasicTextEncryptor();
  		encryptor.setPassword(password);
  		Properties props = new Properties();
  		props.putAll(project.getProperties());
  		if (includeEnvironmentVariables) {
  			props.putAll(WriteProjectProperties.getEnvironmentVariables());
  		}
 		if (includeSystemProperties) {
 			props.putAll(System.getProperties());
 		}
 		List<String> keys = new ArrayList<String>(props.stringPropertyNames());
 		Collections.sort(keys);
 		for (String key : keys) {
 			boolean decrypt = key.endsWith(endsWith);
 			if (!decrypt) {
 				continue;
 			}
 			String value = props.getProperty(key);
 			if (StringUtils.isBlank(value) && !quiet) {
 				getLog().info("Skipping blank property " + key);
 				continue;
 			}
 			String newValue = encryptor.decrypt(value);
 			int length = endsWith.length();
 			String newKey = key.substring(0, key.length() - length);
 			project.getProperties().setProperty(newKey, newValue);
 			if (quiet) {
 				continue;
 			}
 			if (show) {
 				getLog().info("Setting " + newKey + "=" + newValue + " - " + value);
 			} else {
 				getLog().info("Setting " + newKey);
 			}
 		}
 	}
 
 	public boolean isQuiet() {
 		return quiet;
 	}
 
 	public void setQuiet(boolean quiet) {
 		this.quiet = quiet;
 	}
 
 	public String getEndsWith() {
 		return endsWith;
 	}
 
 	public void setEndsWith(String endsWith) {
 		this.endsWith = endsWith;
 	}
 
 	public boolean isShow() {
 		return show;
 	}
 
 	public void setShow(boolean show) {
 		this.show = show;
 	}
 
 	public String getPassword() {
 		return password;
 	}
 
 	public void setPassword(String password) {
 		this.password = password;
 	}
 
 	public MavenProject getProject() {
 		return project;
 	}
 
 	public boolean isIncludeSystemProperties() {
 		return includeSystemProperties;
 	}
 
 	public void setIncludeSystemProperties(boolean includeSystemProperties) {
 		this.includeSystemProperties = includeSystemProperties;
 	}
 
 	public boolean isIncludeEnvironmentVariables() {
 		return includeEnvironmentVariables;
 	}
 
 	public void setIncludeEnvironmentVariables(boolean includeEnvironmentVariables) {
 		this.includeEnvironmentVariables = includeEnvironmentVariables;
 	}
 }