/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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.apache.myfaces.tobago.renderkit.css;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.lang.invoke.MethodHandles;
  import java.util.regex.Pattern;
  
  /**
   * This is a list of used font-awesome icons in Tobago. Feel free to extend.
   */
  public enum Icons implements CssItem {
  
    ANGLE_DOUBLE_LEFT,
    ANGLE_DOUBLE_RIGHT,
    ANGLE_DOWN,
    ANGLE_LEFT,
    ANGLE_RIGHT,
    ANGLE_UP,
    BACKWARD,
    BARS,
    CALENDAR,
    CLOCK_O,
    ELLIPSIS_H,
    EXCLAMATION,
    FOLDER_OPEN,
    FORWARD,
    MINUS_SQUARE_O,
    PLUS_SQUARE_O,
    QUESTION,
    SQUARE_O,
    STEP_BACKWARD,
    STEP_FORWARD;
  
    private static final Logger LOG = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
  
    public static final CssItem FA = new CssItem() {
      @Override
      public String getName() {
        return "fa";
      }
    };
  
    private static final Pattern PATTERN = Pattern.compile("^(fa(-[a-z]+)+)$");
  
    private String fa;
  
    Icons() {
      this.fa = "fa-" + name().toLowerCase().replaceAll("_", "-");
    }
  
    @Override
    public String getName() {
      return fa;
    }
  
    public static CssItem custom(final String name) {
  
      return new CssItem() {
  
        @Override
        public String getName() {
          if (PATTERN.matcher(name).matches()) {
            return name;
          } else {
            LOG.warn("Unknown Icon: '" + name + "'");
            return null;
          }
        }
      };
    }
  
  }