package eu.fbk.dkm.pikes.tintop.server;
   
   import eu.fbk.dkm.pikes.tintop.AnnotationPipeline;
   import ixa.kaflib.KAFDocument;
   import org.apache.log4j.Logger;
   import org.glassfish.grizzly.http.server.HttpHandler;
   import org.glassfish.grizzly.http.server.Request;
   import org.glassfish.grizzly.http.server.Response;
   
  import java.io.IOException;
  import java.text.SimpleDateFormat;
  import java.util.Date;
  import java.util.HashMap;
  import java.util.Locale;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  /**
   * Created with IntelliJ IDEA.
   * User: alessio
   * Date: 23/07/14
   * Time: 09:12
   * To change this template use File | Settings | File Templates.
   */
  
  public class AbstractHandler extends HttpHandler {
  
  //	public final static Pattern ANNOTATOR_PATTERN = Pattern.compile("^annotator_(.*)");
  	public final static Pattern META_PATTERN = Pattern.compile("^meta_(.*)");
  	protected AnnotationPipeline pipeline;
  
  //	protected HashSet<String> annotators = new HashSet<>();
  	protected HashMap<String, String> meta = new HashMap<>();
  
  	static Logger logger = Logger.getLogger(AbstractHandler.class.getName());
  
  	public AbstractHandler(AnnotationPipeline pipeline) {
  		super();
  		this.pipeline = pipeline;
  	}
  
  	@Override
  	public void service(Request request, Response response) throws Exception {
  		request.setCharacterEncoding("UTF-8");
  		response.setCharacterEncoding("UTF-8");
  
  
  		for (String parameterLabel : request.getParameterMap().keySet()) {
  
  			Matcher matcher;
  
  //			matcher = ANNOTATOR_PATTERN.matcher(parameterLabel);
  //			if (matcher.find()) {
  //				annotators.add(matcher.group(1));
  //			}
  
  			matcher = META_PATTERN.matcher(parameterLabel);
  			if (matcher.find()) {
  				String key = matcher.group(1);
  				meta.put(key, request.getParameter(parameterLabel));
  			}
  		}
  
  		if (meta.get("uri") == null || meta.get("uri").length() == 0) {
  			meta.put("uri", pipeline.getDefaultConfig().getProperty("default_uri"));
  		}
  	}
  
  	public void writeOutput(Response response, String contentType, String output) throws IOException {
  		response.setContentType(contentType);
  		response.addHeader("Access-Control-Allow-Origin", "*");
  		response.getWriter().write(output);
  	}
  
  	public static KAFDocument text2naf(String text, HashMap<String, String> meta) {
  		KAFDocument doc = new KAFDocument("en", "v3");
  		doc.setRawText(text);
  
  		SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX", Locale.ENGLISH);
  
  		String date = "";
  		try {
  			date = format.format(new Date());
  			if (meta.get("date") != null) {
  				date = format.format(format.parse(meta.get("date")));
  			}
  		} catch (Exception e) {
  			logger.error(e.getMessage());
  		}
  
  		KAFDocument.FileDesc fileDesc = doc.createFileDesc();
  		KAFDocument.Public aPublic = doc.createPublic();
  
  		if (meta != null) {
  			fileDesc.author = meta.get("author");
  			fileDesc.title = meta.get("title");
  			fileDesc.filename = meta.get("filename");
  			fileDesc.creationtime = date;
  			aPublic.publicId = meta.get("id");
 			aPublic.uri = meta.get("uri");
 		}
 
 //		KAFDocument.Public p = doc.createPublic();
 //		p.uri = "http://www.example.com";
 //		p.publicId = "0";
 //
 //		KAFDocument.FileDesc d = doc.createFileDesc();
 //		d.creationtime = date;
 //		d.author = "Unknown author";
 //		d.filename = "test.xml";
 //		d.title = "Unknown title";
 
 		return doc;
 	}
 }