package com.melloware.jukes.ws;
   
   import java.util.ArrayList;
   import java.util.Collection;
   
   import org.apache.commons.logging.Log;
   import org.apache.commons.logging.LogFactory;
   
   import entagged.freedb.Freedb;
  import entagged.freedb.FreedbException;
  import entagged.freedb.FreedbQueryResult;
  import entagged.freedb.FreedbReadResult;
  import entagged.freedb.FreedbSettings;
  
  import com.melloware.jukes.util.MessageUtil;
  import com.melloware.jukes.exception.WebServiceException;
  import com.melloware.jukes.gui.tool.Resources;
  
  /**
   * Static methods for performing web services calls to FreeDB
   * 
   * Copyright (c) 1999-2007 Melloware, Inc. <http://www.melloware.com>
   * @author Emil A. Lefkof III <info@melloware.com>
   * @version 4.0
   * AZ Development 2010
   */
  
  @SuppressWarnings("unchecked")
  public final class FreeDBSearch {
     private static final Log LOG = LogFactory.getLog(FreeDBSearch.class);
  
     /**
      * Default constructor. Private so no instantiation.
      */
     private FreeDBSearch() {
        super();
     }
    
  
     /**
      * Finds a collection of albums at FreeDB
      * <p>
      * @param  float[] trackLength - a set of track lengths to search at FreeDB for.
      * @return a collection of items matching the search criteria
      * @throws WebServiceException if any error occurs querying the FreeDB service
      */
     public static Collection findItemsAtFreeDB(float[] trackLength)
              throws WebServiceException {
        if (LOG.isDebugEnabled()) {
           LOG.debug("FreeDB search");
        }
        Collection collection = null;
        Freedb freedb;
        //Create default FreeDB settings
        FreedbSettings fdbs = new FreedbSettings();
        try {
      	freedb = new Freedb(fdbs);
  	  
  		FreedbQueryResult[] fdbqr = freedb.query(trackLength);
          if (fdbqr.length ==0) {
        	  MessageUtil.showInformation(null, Resources.getString("messages.NoItemsFound"));  
          }
          	
  		collection = loadItems(freedb, fdbqr);
        } catch (FreedbException e) {
            LOG.error(e.getMessage(), e);
            MessageUtil.showInformation(null, "FreeDB: " + e.getMessage());
        } catch (Exception ex) {
           LOG.error(ex.getMessage(), ex);
           throw new WebServiceException(ex);
        } 
  
        return collection;
     }
  
     /**
      * Loads a collection with FreeDB Items from a list of FreeDB-response.
      * <p>
      * @param Freedb aFreeDB 
      * @param FreedbQueryResult[] aFreeDBReaults the list of FreeDB query results
      * @return a collection of FreeDBItem objects or an empty collection
      * @throws WebServiceException 
      */
     private static Collection loadItems(Freedb aFreeDB, FreedbQueryResult[] aFreeDBResults) throws WebServiceException {
        ArrayList collection = new ArrayList();
      if (aFreeDBResults != null) {
      	try {
          for (int i=0; i<aFreeDBResults.length; i=i+1){
          	FreedbReadResult freedbResult = aFreeDB.read(aFreeDBResults[i]);  
              collection.add(new FreeDBItem(freedbResult));
           }      
      	} catch (FreedbException ex){
              LOG.error(ex.getMessage(), ex);
              throw new WebServiceException(ex);	
      	}
         } 
        return collection;
     }
  
 }