/*
    * Portions of this software was developed by employees of the National Institute
    * of Standards and Technology (NIST), an agency of the Federal Government and is
    * being made available as a public service. Pursuant to title 17 United States
    * Code Section 105, works of NIST employees are not subject to copyright
    * protection in the United States. This software may be subject to foreign
    * copyright. Permission in the United States and in foreign countries, to the
    * extent that NIST may hold copyright, to use, copy, modify, create derivative
    * works, and distribute this software and its documentation without fee is hereby
   * granted on a non-exclusive basis, provided that this notice and disclaimer
   * of warranty appears in all copies.
   *
   * THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER
   * EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY
   * THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM
   * INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE
   * SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE.  IN NO EVENT
   * SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT,
   * INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM,
   * OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY,
   * CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR
   * PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT
   * OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER.
   */
  
  package gov.nist.secauto.metaschema.core.model.constraint;
  
  import gov.nist.secauto.metaschema.core.datatype.IDataTypeAdapter;
  import gov.nist.secauto.metaschema.core.datatype.markup.MarkupLine;
  import gov.nist.secauto.metaschema.core.datatype.markup.MarkupMultiline;
  import gov.nist.secauto.metaschema.core.metapath.MetapathExpression;
  import gov.nist.secauto.metaschema.core.util.ObjectUtils;
  
  import java.util.Map;
  import java.util.Set;
  import java.util.regex.Pattern;
  
  import javax.xml.namespace.QName;
  
  import edu.umd.cs.findbugs.annotations.NonNull;
  import edu.umd.cs.findbugs.annotations.Nullable;
  
  public final class DefaultMatchesConstraint
      extends AbstractConstraint
      implements IMatchesConstraint {
    private final Pattern pattern;
    private final IDataTypeAdapter<?> dataType;
  
    /**
     * Create a new matches constraint, which enforces a value pattern and/or data
     * type.
     *
     * @param id
     *          the optional identifier for the constraint
     * @param formalName
     *          the constraint's formal name or {@code null} if not provided
     * @param description
     *          the constraint's semantic description or {@code null} if not
     *          provided
     * @param source
     *          information about the constraint source
     * @param level
     *          the significance of a violation of this constraint
     * @param target
     *          the Metapath expression identifying the nodes the constraint targets
     * @param properties
     *          a collection of associated properties
     * @param pattern
     *          the value pattern to match or {@code null} if there is no match
     *          pattern
     * @param dataType
     *          the value data type to match or {@code null} if there is no match
     *          data type
     * @param remarks
     *          optional remarks describing the intent of the constraint
     */
    private DefaultMatchesConstraint(
        @Nullable String id,
        @Nullable String formalName,
        @Nullable MarkupLine description,
        @NonNull ISource source,
        @NonNull Level level,
        @NonNull MetapathExpression target,
        @NonNull Map<QName, Set<String>> properties,
        @Nullable Pattern pattern,
        @Nullable IDataTypeAdapter<?> dataType,
        @Nullable MarkupMultiline remarks) {
      super(id, formalName, description, source, level, target, properties, remarks);
      if (pattern == null && dataType == null) {
        throw new IllegalArgumentException("a pattern or data type must be provided");
      }
      this.pattern = pattern;
      this.dataType = dataType;
    }
  
    @Override
    public Pattern getPattern() {
      return pattern;
   }
 
   @Override
   public IDataTypeAdapter<?> getDataType() {
     return dataType;
   }
 
   @Override
   public <T, R> R accept(IConstraintVisitor<T, R> visitor, T state) {
     return visitor.visitMatchesConstraint(this, state);
   }
 
   @NonNull
   public static Builder builder() {
     return new Builder();
   }
 
   public static final class Builder
       extends AbstractConstraintBuilder<Builder, DefaultMatchesConstraint> {
     private Pattern pattern;
     private IDataTypeAdapter<?> datatype;
 
     private Builder() {
       // disable construction
     }
 
     public Builder regex(@NonNull String pattern) {
       return regex(ObjectUtils.notNull(Pattern.compile(pattern)));
     }
 
     public Builder regex(@NonNull Pattern pattern) {
       this.pattern = pattern;
       return this;
     }
 
     public Builder datatype(@NonNull IDataTypeAdapter<?> datatype) {
       this.datatype = datatype;
       return this;
     }
 
     @Override
     protected Builder getThis() {
       return this;
     }
 
     @Override
     protected void validate() {
       super.validate();
 
       if (getPattern() == null && getDatatype() == null) {
         throw new IllegalStateException("A pattern or data type must be provided at minimum.");
       }
     }
 
     protected Pattern getPattern() {
       return pattern;
     }
 
     protected IDataTypeAdapter<?> getDatatype() {
       return datatype;
     }
 
     @Override
     protected DefaultMatchesConstraint newInstance() {
       return new DefaultMatchesConstraint(
           getId(),
           getFormalName(),
           getDescription(),
           ObjectUtils.notNull(getSource()),
           getLevel(),
           getTarget(),
           getProperties(),
           getPattern(),
           getDatatype(),
           getRemarks());
     }
   }
 }