/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at legal-notices/CDDLv1_0.txt
 * or http://forgerock.org/license/CDDLv1.0.html.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at legal-notices/CDDLv1_0.txt.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information:
 *      Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 *
 *
 *      Copyright 2008 Sun Microsystems, Inc.
 *      Portions Copyright 2014-2015 ForgeRock AS
 */

package org.opends.server.admin;
import org.forgerock.i18n.LocalizableMessage;



import static org.forgerock.util.Reject.ifNull;

import java.util.EnumSet;
import java.util.Locale;
import java.util.MissingResourceException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;



/**
 * String property definition.
 */
public final class StringPropertyDefinition extends PropertyDefinition<String> {

  /**
   * An interface for incrementally constructing string property
   * definitions.
   */
  public static class Builder extends
      AbstractBuilder<String, StringPropertyDefinition> {

    /**
     * Flag indicating whether values of this property are
     * case-insensitive.
     */
    private boolean isCaseInsensitive = true;

    /** Optional pattern which values of this property must match. */
    private Pattern pattern;

    /**
     * Pattern usage which provides a user-friendly summary of the
     * pattern if present.
     */
    private String patternUsage;



    /** Private constructor. */
    private Builder(AbstractManagedObjectDefinition<?, ?> d,
        String propertyName) {
      super(d, propertyName);
    }



    /**
     * Set a flag indicating whether values of this property are
     * case-insensitive.
     *
     * @param value
     *          <code>true</code> if values are case-insensitive, or
     *          <code>false</code> otherwise.
     */
    public final void setCaseInsensitive(boolean value) {
      isCaseInsensitive = value;
    }



    /**
     * Set the regular expression pattern which values of this
     * property must match. By default there is no pattern defined.
     *
     * @param pattern
     *          The regular expression pattern string, or
     *          <code>null</code> if there is no pattern.
     * @param patternUsage
     *          A user-friendly usage string representing the pattern
     *          which can be used in error messages and help (e.g. for
     *          patterns which match a host/port combination, the
     *          usage string "HOST:PORT" would be appropriate).
     * @throws PatternSyntaxException
     *           If the provided regular expression pattern has an
     *           invalid syntax.
     */
    public final void setPattern(String pattern, String patternUsage)
        throws PatternSyntaxException {
      if (pattern == null) {
        this.pattern = null;
        this.patternUsage = null;
      } else {
        this.pattern = Pattern.compile(pattern);
        this.patternUsage = patternUsage;
      }
    }



    /** {@inheritDoc} */
    @Override
    protected StringPropertyDefinition buildInstance(
        AbstractManagedObjectDefinition<?, ?> d, String propertyName,
        EnumSet<PropertyOption> options,
        AdministratorAction adminAction,
        DefaultBehaviorProvider<String> defaultBehavior) {
      return new StringPropertyDefinition(d, propertyName, options,
          adminAction, defaultBehavior, isCaseInsensitive, pattern,
          patternUsage);
    }

  }



  /**
   * Create a string property definition builder.
   *
   * @param d
   *          The managed object definition associated with this
   *          property definition.
   * @param propertyName
   *          The property name.
   * @return Returns the new string property definition builder.
   */
  public static Builder createBuilder(AbstractManagedObjectDefinition<?, ?> d,
      String propertyName) {
    return new Builder(d, propertyName);
  }

  /**
   * Flag indicating whether values of this property are
   * case-insensitive.
   */
  private final boolean isCaseInsensitive;

  /** Optional pattern which values of this property must match. */
  private final Pattern pattern;

  /**
   * Pattern usage which provides a user-friendly summary of the
   * pattern if present.
   */
  private final String patternUsage;



  /** Private constructor. */
  private StringPropertyDefinition(AbstractManagedObjectDefinition<?, ?> d,
      String propertyName, EnumSet<PropertyOption> options,
      AdministratorAction adminAction,
      DefaultBehaviorProvider<String> defaultBehavior,
      boolean isCaseInsensitive, Pattern pattern, String patternUsage) {
    super(d, String.class, propertyName, options, adminAction,
        defaultBehavior);
    this.isCaseInsensitive = isCaseInsensitive;
    this.pattern = pattern;
    this.patternUsage = patternUsage;
  }



  /** {@inheritDoc} */
  @Override
  public <R, P> R accept(PropertyDefinitionVisitor<R, P> v, P p) {
    return v.visitString(this, p);
  }



  /** {@inheritDoc} */
  @Override
  public <R, P> R accept(PropertyValueVisitor<R, P> v, String value, P p) {
    return v.visitString(this, value, p);
  }



  /** {@inheritDoc} */
  @Override
  public String decodeValue(String value)
      throws PropertyException {
    ifNull(value);

    try {
      validateValue(value);
    } catch (PropertyException e) {
      throw PropertyException.illegalPropertyValueException(this, value);
    }

    return value;
  }



  /**
   * Gets the optional regular expression pattern which values of this
   * property must match.
   *
   * @return Returns the optional regular expression pattern which
   *         values of this property must match, or <code>null</code>
   *         if there is no pattern.
   */
  public Pattern getPattern() {
    return pattern;
  }



  /**
   * Gets the pattern synopsis of this string property definition in
   * the default locale.
   *
   * @return Returns the pattern synopsis of this string property
   *         definition in the default locale, or <code>null</code>
   *         if there is no pattern synopsis (which is the case when
   *         there is no pattern matching defined for this string
   *         property definition).
   */
  public LocalizableMessage getPatternSynopsis() {
    return getPatternSynopsis(Locale.getDefault());
  }



  /**
   * Gets the optional pattern synopsis of this string property
   * definition in the specified locale.
   *
   * @param locale
   *          The locale.
   * @return Returns the pattern synopsis of this string property
   *         definition in the specified locale, or <code>null</code>
   *         if there is no pattern synopsis (which is the case when
   *         there is no pattern matching defined for this string
   *         property definition).
   */
  public LocalizableMessage getPatternSynopsis(Locale locale) {
    ManagedObjectDefinitionI18NResource resource =
      ManagedObjectDefinitionI18NResource.getInstance();
    String property = "property." + getName()
        + ".syntax.string.pattern.synopsis";
    try {
      return resource
          .getMessage(getManagedObjectDefinition(), property, locale);
    } catch (MissingResourceException e) {
      return null;
    }
  }



  /**
   * Gets a user-friendly usage string representing the pattern which
   * can be used in error messages and help (e.g. for patterns which
   * match a host/port combination, the usage string "HOST:PORT" would
   * be appropriate).
   *
   * @return Returns the user-friendly pattern usage string, or
   *         <code>null</code> if there is no pattern.
   */
  public String getPatternUsage() {
    return patternUsage;
  }



  /**
   * Query whether values of this property are case-insensitive.
   *
   * @return Returns <code>true</code> if values are
   *         case-insensitive, or <code>false</code> otherwise.
   */
  public boolean isCaseInsensitive() {
    return isCaseInsensitive;
  }



  /** {@inheritDoc} */
  @Override
  public String normalizeValue(String value)
      throws PropertyException {
    ifNull(value);

    if (isCaseInsensitive()) {
      return value.trim().toLowerCase();
    } else {
      return value.trim();
    }
  }



  /** {@inheritDoc} */
  @Override
  public void validateValue(String value) throws PropertyException {
    ifNull(value);

    if (pattern != null) {
      Matcher matcher = pattern.matcher(value);
      if (!matcher.matches()) {
        throw PropertyException.illegalPropertyValueException(this, value);
      }
    }
  }
}