/*
    * #%L
    * wcm.io
    * %%
    * Copyright (C) 2018 wcm.io
    * %%
    * 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.
   * #L%
   */
  package io.wcm.qa.glnm.differences.specialized;
  
  import java.util.Iterator;
  
  import io.wcm.qa.glnm.differences.base.Difference;
  import io.wcm.qa.glnm.differences.base.Differences;
  import io.wcm.qa.glnm.differences.generic.MutableDifferences;
  
  /**
   * Class and package name differences constructed from class object.
   *
   * @since 1.0.0
   */
  public class ClassDifferences implements Differences {
  
    private ClassNameDifference classDifference;
    private PackageDifferences packageDifferences;
  
    /**
     * <p>Constructor for ClassDifferences.</p>
     *
     * @param clazz to extract class and package name from
     * @since 2.0.0
     */
    public ClassDifferences(Class clazz) {
      setClass(clazz);
    }
  
    /** {@inheritDoc} */
    @Override
    public String getKey() {
      return getDifferences().getKey();
    }
  
    /**
     * <p>getRootPackage.</p>
     *
     * @return a {@link java.lang.String} object.
     * @since 2.0.0
     */
    public String getRootPackage() {
      return getPackageDifferences().getRootPackage();
    }
  
    /** {@inheritDoc} */
    @Override
    public Iterator<Difference> iterator() {
      return getDifferences().iterator();
    }
  
    /**
     * <p>setClass.</p>
     *
     * @param clazz to extract class and package name from
     * @since 2.0.0
     */
    public void setClass(Class clazz) {
      setClassDifference(new ClassNameDifference(clazz));
      setPackage(clazz.getPackage());
    }
  
    /**
     * Set maximum length of class name in rendered keys.
     *
     * @param maxLength when to start shortening class name differnce key
     * @since 2.0.0
     */
    public void setClassNameMaxLength(int maxLength) {
      getClassDifference().setMaxTagLength(maxLength);
    }
  
    /**
     * <p>setPackage.</p>
     *
     * @param p to extract package name from
     * @since 2.0.0
     */
    public void setPackage(Package p) {
      setPackageDifferences(new PackageDifferences(p));
    }
 
   /**
    * <p>setRootPackage.</p>
    *
    * @param rootPackage will be removed from beginning of package name
    * @since 2.0.0
    */
   public void setRootPackage(String rootPackage) {
     getPackageDifferences().setRootPackage(rootPackage);
   }
 
   /** {@inheritDoc} */
   @Override
   public String toString() {
     StringBuilder stringBuilder = new StringBuilder();
     stringBuilder.append("Class(package=");
     stringBuilder.append(getPackageDifferences().toString());
     stringBuilder.append("|class=");
     stringBuilder.append(getClassDifference().toString());
     stringBuilder.append(")");
     return stringBuilder.toString();
   }
 
   private ClassNameDifference getClassDifference() {
     if (classDifference == null) {
       useDefaultClass();
     }
     return classDifference;
   }
 
   private Differences getDifferences() {
     MutableDifferences differences = new MutableDifferences();
     differences.addAll(getPackageDifferences());
     differences.add(getClassDifference());
     return differences;
   }
 
   private PackageDifferences getPackageDifferences() {
     if (packageDifferences == null) {
       useDefaultClass();
     }
     return packageDifferences;
   }
 
   protected void useDefaultClass() {
     setClass(Object.class);
   }
 
   private void setClassDifference(ClassNameDifference classDifference) {
     this.classDifference = classDifference;
   }
 
   private void setPackageDifferences(PackageDifferences packageDifferences) {
     this.packageDifferences = packageDifferences;
   }
 }