package uk.ac.vamsas.client.simpleclient;

import java.io.File;
import java.net.URI;

import uk.ac.vamsas.client.InvalidSessionUrnException;

/**
 * SessionUrn for simpleclient sessions:
 * simpleclient://{Absolute path to session directory}
 * 
 * For simpleclient urn, it consideres as on the same machine, using the path to the session
 *  directory to generate the session URN
 * 
 * @author jimp
 *
 */
public class SessionUrn extends uk.ac.vamsas.client.SessionUrn {
  /**
   * a simple client session urn prefix
   */
  public static final String SIMPLECLIENT="simpleclient";
  public static String VAMSASDOCUMENT="vdoc";
  static {
    TYPES.put(SIMPLECLIENT, SessionUrn.class);
    TYPES.put(SessionUrn.VAMSASDOCUMENT, SessionUrn.class);
  }
  
  /**
   * Creates a SessionUrn object from a String.
   * The string must be a string representation of a URI
   * @param urnString
   * @throws InvalidSessionUrnException
   */
  public SessionUrn(String urnString) throws InvalidSessionUrnException
    {
      super();
      this.setURN(urnString);
    }
  
  
  /**
   * Generates a sessionURN bases on a session directory location
   * 
   * @param sessionLocation the file object to the session directory
   */
  public SessionUrn(File sessionLocation) 
  {//throws MalformedURLException {
  // TODO: LATER: implement switch to have vamsas document or simpleclient sessions for same constructor
 //use URI instead of URL
    super(SIMPLECLIENT, sessionLocation.getAbsoluteFile().toURI());
  }
  
  /**
   * Generates a sessionURN bases on a vamsas session
   * @param session a VamsasSession
   * 
   * Should return the same URN string than the creation with the session directory
   */
  public SessionUrn(VamsasSession session)
  {
    //throws MalformedURLException {
    //  use URI instead of URL
    super(SIMPLECLIENT, session.sessionDir.getAbsoluteFile().toURI());
  }
  
  
  


  /**
   * TODO: LATER: think about this again.
   * 
   * Retrieves the file associated to the current sessionURN.
   * The sessionURN (URI) is based on the session directory absolute path.
   * Use the raw path of the URN and change the scheme to file to generate a new file 
   * URI. Then, from the URI create the File object (a File object  can be created from an uri)
   * 
   * @return File object representing the session URN //
   * File(urn.getPath())
   */
  public File asFile() {
    String path = this.urn.getRawPath();
      
     return   new File (  URI.create("file://"+path)); 
  }
  // TODO: add abstract 'handler' methods for resolving the URN to a particular class
}