package com.atlassian.plugin.webresource;
   
   import static com.atlassian.plugin.servlet.AbstractFileServerServlet.PATH_SEPARATOR;
   import static com.atlassian.plugin.servlet.AbstractFileServerServlet.SERVLET_PATH;
   
   import java.util.Collections;
   import java.util.HashSet;
   import java.util.List;
   import java.util.Map;
  import java.util.Set;
  
  import com.google.common.collect.ImmutableMap;
  
  /**
   * Represents a batch of all resources that declare themselves as part of a given context(s).
   * <p/>
   * The URL for batch resources is /download/contextbatch/&lt;type>/&lt;contextname>/batch.&lt;type. The additional type part in the path
   * is simply there to make the number of path-parts identical with other resources, so relative URLs will still work
   * in CSS files.
   * <p/>
   * The &lt;contextname&gt; part has the following syntax - <br/>
   * &lt;includedContext1&gt;,&lt;includedContext2&gt;,-&lt;excludedContext1&gt;,-&lt;excludedContext2&gt;
   * <br/>
   * To clarify, multiple comma separated contexts should be combined with any contexts preceded by a '-' to be excluded.
   *
   * @since 2.9.0
   */
  class ContextBatchPluginResource implements PluginResource
  {
      static final String URL_PREFIX = PATH_SEPARATOR + SERVLET_PATH + PATH_SEPARATOR + "contextbatch" + PATH_SEPARATOR;
  
      private final ResourceKey resource;
      private final String key;
      private final String hash;
      private final List<String> contexts;
      private final Iterable<String> excludedContexts;    
      private final Map<String, String> params;
      private final Set<BatchedWebResourceDescriptor> batchedWebResourceDescriptors;
  
      ContextBatchPluginResource(final String key, List<String> contexts, final Iterable<String> excludedContexts,
              final String hash, final String type, final Map<String, String> params, Set<BatchedWebResourceDescriptor> batchedWebResourceDescriptor)
      {
          resource = ResourceKey.Builder.batch(type);
          this.params = ImmutableMap.copyOf(params);
          this.key = key;
          this.hash = hash;
          this.contexts = contexts;
          this.excludedContexts = excludedContexts;
          this.batchedWebResourceDescriptors = Collections.unmodifiableSet(batchedWebResourceDescriptor);
      }
      
      ContextBatchPluginResource(final String key, final String hash, final String type, final Map<String, String> params, Set<BatchedWebResourceDescriptor> batchedWebResourceDescriptor)
      {
          this(key, Collections.<String>emptyList(), Collections.<String>emptyList(), hash, type, params, batchedWebResourceDescriptor);
      }
  
      Iterable<String> getContexts()
      {
          return contexts;
      }
  
      public Iterable<String> getExcludedContexts()
      {
          return excludedContexts;
      }    
      
      public String getUrl()
      {
          final StringBuilder buf = new StringBuilder(URL_PREFIX.length() + 20);
          buf.append(URL_PREFIX).append(getType()).append(PATH_SEPARATOR).append(key).append(PATH_SEPARATOR).append(getResourceName());
          ResourceUtils.addParamsToUrl(buf, getParams());
          return buf.toString();
      }
  
      public Map<String, String> getParams()
      {
          return params;
      }
      
      public String getVersion(final WebResourceIntegration integration)
      {
          return hash;
      }
  
      public String getType()
      {
          return resource.suffix();
      }
  
      public boolean isCacheSupported()
      {
          return true;
      }
  
      public String getResourceName()
      {
          return resource.name();
      }
  
     public String getModuleCompleteKey()
     {
         return "contextbatch-" + resource.name();
     }
         
     @Override
     public Set<BatchedWebResourceDescriptor> getBatchedWebResourceDescriptors()
     {
         return batchedWebResourceDescriptors;
     }
 
     @Override
     public String toString()
     {
         return "[Context Batch type=" + getType() + ", params=" + params + "]";
     }
 }