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/*! ******************************************************************************
 *
 * Pentaho Data Integration
 *
 * Copyright (C) 2002-2017 by Hitachi Vantara : http://www.pentaho.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.pentaho.di.imp.rules;

import java.util.List;

import org.pentaho.di.core.exception.KettleException;
import org.pentaho.di.core.plugins.ImportRulePluginType;
import org.pentaho.di.core.plugins.PluginInterface;
import org.pentaho.di.core.plugins.PluginRegistry;
import org.pentaho.di.core.row.value.ValueMetaString;
import org.pentaho.di.core.xml.XMLHandler;
import org.pentaho.di.imp.rule.ImportRuleInterface;
import org.pentaho.di.imp.rule.ImportValidationFeedback;
import org.w3c.dom.Node;

public abstract class BaseImportRule implements ImportRuleInterface {

  public static String XML_TAG = "rule";

  private String id;
  private boolean enabled;

  public BaseImportRule() {
    this.enabled = false;
  }

  @Override
  public ImportRuleInterface clone() {
    try {
      return (ImportRuleInterface) super.clone();
    } catch ( CloneNotSupportedException e ) {
      throw new RuntimeException( "Unable to clone import rule", e );
    }
  }

  @Override
  public boolean isUnique() {
    return true;
  }

  @Override
  public abstract List verifyRule( Object subject );

  @Override
  public String getXML() {
    StringBuilder xml = new StringBuilder();

    xml.append( XMLHandler.addTagValue( "id", id ) );
    xml.append( XMLHandler.addTagValue( "enabled", enabled ) );

    return xml.toString();
  }

  @Override
  public void loadXML( Node ruleNode ) throws KettleException {
    id = XMLHandler.getTagValue( ruleNode, "id" );
    enabled = ValueMetaString.convertStringToBoolean( XMLHandler.getTagValue( ruleNode, "enabled" ) );
  }

  @Override
  public String toString() {
    // The rule name with an indication of whether or not this rule is enabled should do for now.
    //
    String pluginId = PluginRegistry.getInstance().getPluginId( this );
    PluginInterface plugin = PluginRegistry.getInstance().findPluginWithId( ImportRulePluginType.class, pluginId );
    return plugin.getName() + " (" + ( enabled ? "enabled" : "disabled" ) + ").";
  }

  /**
   * @return the enabled
   */
  @Override
  public boolean isEnabled() {
    return enabled;
  }

  /**
   * @param enabled
   *          the enabled to set
   */
  @Override
  public void setEnabled( boolean enabled ) {
    this.enabled = enabled;
  }

  /**
   * @return the id
   */
  @Override
  public String getId() {
    return id;
  }

  /**
   * @param id
   *          the id to set
   */
  @Override
  public void setId( String id ) {
    this.id = id;
  }

  /**
   * This returns the expected name for the composite that allows a base import rule to be edited.
   *
   * The expected name is in the org.pentaho.di.ui tree and has a class name that is the name of the job entry with
   * 'Composite' added to the end.
   *
   * e.g. if the import rule class name is: "org.pentaho.di.imp.rules.DatabaseConfigurationImportRule" the composite
   * then the composite class name would be: "org.pentaho.di.ui.imp.rules.DatabaseConfigurationImportRuleComposite"
   *
   * If the composite class for a job entry does not match this pattern it should override this method and return the
   * appropriate class name
   *
   * @return full class name of the composite class
   */
  @Override
  public String getCompositeClassName() {
    String className = getClass().getCanonicalName();
    className = className.replaceFirst( "\\.di\\.", ".di.ui." );
    className += "Composite";
    return className;
  }

}