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/**
 *
 * Copyright (C) 2010 Cloud Conscious, LLC. 
 *
 * ====================================================================
 * 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.
 * ====================================================================
 */

package org.jclouds.aws.sqs.xml.internal;

import java.net.URI;
import java.util.Map;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.inject.Inject;
import javax.inject.Singleton;

import org.jclouds.aws.sqs.domain.Queue;

import com.google.common.collect.ImmutableBiMap;
import com.google.common.collect.Sets;

/**
 * 
 * @see 
 * @author Adrian Cole
 */
@Singleton
public class BaseRegexQueueHandler {
   private final ImmutableBiMap uriToRegion;
   Pattern pattern = Pattern.compile("(https://[\\S&&[^<]]+)");

   @Inject
   protected BaseRegexQueueHandler(Map regionMap) {
      this.uriToRegion = ImmutableBiMap. builder().putAll(regionMap).build().inverse();
   }

   public Set parse(String in) {
      Set queues = Sets.newLinkedHashSet();
      Matcher matcher = pattern.matcher(in);
      while (matcher.find()) {
         String uriText = matcher.group(1);
         String queueName = uriText.substring(uriText.lastIndexOf('/') + 1);
         URI location = URI.create(uriText);
         String regionString = uriText.substring(0, uriText.indexOf(".com/") + 4);
         URI regionURI = URI.create(regionString);
         String region = uriToRegion.get(regionURI);
         queues.add(new Queue(region, queueName, location));
      }
      return queues;
   }

}