/*
    * 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.layout;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.lang.invoke.MethodHandles;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.StringTokenizer;
  
  public class MarginTokens {
  
    private static final Logger LOG = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
  
    private List<Margin> margins = new ArrayList<>();
  
    public int getSize() {
      return margins.size();
    }
  
    public Margin get(final int index) {
      return margins.get(index);
    }
  
    public void addMargin(final Margin token) {
      margins.add(token);
    }
  
    public List<Margin> getMargins() {
      return margins;
    }
  
    public static MarginTokens parse(final String tokens) {
      if (tokens == null) {
        return null;
      }
      final MarginTokens marginTokens = new MarginTokens();
      final StringTokenizer tokenizer = new StringTokenizer(tokens, "; ");
  
      while (tokenizer.hasMoreTokens()) {
        final String token = tokenizer.nextToken().trim();
        marginTokens.addMargin(parseToken(token));
      }
      return marginTokens;
    }
  
    public static Margin parseToken(final String token) {
      for (final Margin margin : Margin.values()) {
        if (margin.name().equals(token)) {
          return margin;
        }
      }
      LOG.error("Error parsing layout token '" + token + "'! Using 'none' instead.");
      return Margin.none;
    }
  }