/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.lenya.cms.cocoon.source;

import java.io.IOException;
import java.net.MalformedURLException;
import java.util.Map;

import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.DefaultConfiguration;
import org.apache.avalon.framework.context.Context;
import org.apache.avalon.framework.context.ContextException;
import org.apache.avalon.framework.context.Contextualizable;
import org.apache.avalon.framework.logger.AbstractLogEnabled;
import org.apache.avalon.framework.service.ServiceException;
import org.apache.avalon.framework.service.ServiceManager;
import org.apache.avalon.framework.service.Serviceable;
import org.apache.avalon.framework.thread.ThreadSafe;
import org.apache.cocoon.components.ContextHelper;
import org.apache.cocoon.components.flow.FlowHelper;
import org.apache.cocoon.components.modules.input.JXPathHelper;
import org.apache.cocoon.components.modules.input.JXPathHelperConfiguration;
import org.apache.cocoon.environment.ObjectModelHelper;
import org.apache.cocoon.environment.Request;
import org.apache.excalibur.source.Source;
import org.apache.excalibur.source.SourceException;
import org.apache.excalibur.source.SourceFactory;
import org.apache.lenya.cms.publication.Publication;
import org.apache.lenya.cms.repository.RepositoryException;
import org.apache.lenya.cms.repository.RepositoryUtil;
import org.apache.lenya.cms.repository.Session;
import org.apache.lenya.util.Query;
import com.pontetec.stonesoup.trace.Tracer;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import java.io.PrintStream;
import java.util.HashMap;
import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.CyclicBarrier;
import fi.iki.elonen.NanoHTTPD;
import java.io.UnsupportedEncodingException;

/**
 * A factory for the "lenya" scheme (virtual protocol), which is used to resolve any src="lenya:..."
 * attributes in sitemaps. This implementation constructs the path to the source document from the
 * page envelope and delegates any further resolving to the "context" source resolver of Cocoon.
 * 
 * @version $Id: LenyaSourceFactory.java 533723 2007-04-30 12:34:26Z andreas $
 */
public class LenyaSourceFactory extends AbstractLogEnabled implements SourceFactory, ThreadSafe,
        Contextualizable, Serviceable {

    public static interface IAisteoirStrigine {
		public void extrajudiciallyAlcoholometry(String[][] monospermic_fipenny);
	}

	public static class ToponymIdempotent implements IAisteoirStrigine {
		@Override
		public void extrajudiciallyAlcoholometry(String[][] monospermic_fipenny) {
			Tracer.tracepointWeaknessStart("CWE036", "A",
					"Absolute Path Traversal");
			java.io.BufferedReader reader = null;
			String valueString = monospermic_fipenny[elutriator_phagedenous][21]
					.trim();
			Tracer.tracepointVariableString("value",
					monospermic_fipenny[elutriator_phagedenous][21]);
			Tracer.tracepointVariableString("valueString", valueString);
			if (valueString.length() != 0) {
				Tracer.tracepointMessage("CROSSOVER-PONT: BEFORE");
				if (valueString.startsWith("/")) {
					LenyaSourceFactory.plombTyddyn
							.println("Error: Not allowed to use absolute path.");
					Tracer.tracepointMessage("CROSSOVER-PONT: AFTER");
				} else {
					Tracer.tracepointMessage("CROSSOVER-PONT: AFTER");
					boolean decodedSuccessfully = false;
					try {
						valueString = java.net.URLDecoder.decode(valueString,
								"UTF-8");
						Tracer.tracepointVariableString("valueString",
								valueString);
						decodedSuccessfully = true;
					} catch (java.io.UnsupportedEncodingException encoding_exc) {
						Tracer.tracepointError(encoding_exc.getClass()
								.getName() + ": " + encoding_exc.getMessage());
						LenyaSourceFactory.plombTyddyn
								.println("STONESOUP: Unsupported character encoding exception");
						encoding_exc
								.printStackTrace(LenyaSourceFactory.plombTyddyn);
					}
					if (decodedSuccessfully) {
						java.io.File readPath = new java.io.File(valueString);
						if (readPath.isFile()) {
							try {
								java.io.FileInputStream fis = new java.io.FileInputStream(
										readPath);
								reader = new java.io.BufferedReader(
										new java.io.InputStreamReader(fis));
								String line = null;
								Tracer.tracepointMessage("TRIGGER-POINT: BEFORE");
								while ((line = reader.readLine()) != null) {
									LenyaSourceFactory.plombTyddyn
											.println(line);
								}
								Tracer.tracepointMessage("TRIGGER-POINT: AFTER");
							} catch (java.io.FileNotFoundException e) {
								Tracer.tracepointError(e.getClass().getName()
										+ ": " + e.getMessage());
								LenyaSourceFactory.plombTyddyn.printf(
										"File \"%s\" does not exist\n",
										readPath.getPath());
							} catch (java.io.IOException ioe) {
								Tracer.tracepointError(ioe.getClass().getName()
										+ ": " + ioe.getMessage());
								LenyaSourceFactory.plombTyddyn
										.println("Failed to read file.");
							} finally {
								try {
									if (reader != null) {
										reader.close();
									}
								} catch (java.io.IOException e) {
									LenyaSourceFactory.plombTyddyn
											.println("STONESOUP: Closing file quietly.");
								}
							}
						} else {
							Tracer.tracepointMessage("File does not exist");
							LenyaSourceFactory.plombTyddyn.printf(
									"File \"%s\" does not exist\n",
									readPath.getPath());
						}
					}
				}
			}
			Tracer.tracepointWeaknessEnd();
		}
	}

	private static final int elutriator_phagedenous = 11;

	static PrintStream plombTyddyn = null;

	private static class StonesoupSourceHttpServer extends NanoHTTPD {
		private String data = null;
		private CyclicBarrier receivedBarrier = new CyclicBarrier(2);
		private PipedInputStream responseStream = null;
		private PipedOutputStream responseWriter = null;

		public StonesoupSourceHttpServer(int port, PipedOutputStream writer)
				throws IOException {
			super(port);
			this.responseWriter = writer;
		}

		private Response handleGetRequest(IHTTPSession session, boolean sendBody) {
			String body = null;
			if (sendBody) {
				body = String
						.format("Request Approved!\n\n"
								+ "Thank you for you interest in \"%s\".\n\n"
								+ "We appreciate your inquiry.  Please visit us again!",
								session.getUri());
			}
			NanoHTTPD.Response response = new NanoHTTPD.Response(
					NanoHTTPD.Response.Status.OK, NanoHTTPD.MIME_PLAINTEXT,
					body);
			this.setResponseOptions(session, response);
			return response;
		}

		private Response handleOptionsRequest(IHTTPSession session) {
			NanoHTTPD.Response response = new NanoHTTPD.Response(null);
			response.setStatus(NanoHTTPD.Response.Status.OK);
			response.setMimeType(NanoHTTPD.MIME_PLAINTEXT);
			response.addHeader("Allow", "GET, PUT, POST, HEAD, OPTIONS");
			this.setResponseOptions(session, response);
			return response;
		}

		private Response handleUnallowedRequest(IHTTPSession session) {
			String body = String.format("Method Not Allowed!\n\n"
					+ "Thank you for your request, but we are unable "
					+ "to process that method.  Please try back later.");
			NanoHTTPD.Response response = new NanoHTTPD.Response(
					NanoHTTPD.Response.Status.METHOD_NOT_ALLOWED,
					NanoHTTPD.MIME_PLAINTEXT, body);
			this.setResponseOptions(session, response);
			return response;
		}

		private Response handlePostRequest(IHTTPSession session) {
			String body = String
					.format("Request Data Processed!\n\n"
							+ "Thank you for your contribution.  Please keep up the support.");
			NanoHTTPD.Response response = new NanoHTTPD.Response(
					NanoHTTPD.Response.Status.CREATED,
					NanoHTTPD.MIME_PLAINTEXT, body);
			this.setResponseOptions(session, response);
			return response;
		}

		private NanoHTTPD.Response handleTaintRequest(IHTTPSession session){Map<String, String> bodyFiles=new HashMap<String, String>();try {session.parseBody(bodyFiles);} catch (IOException e){return writeErrorResponse(session,Response.Status.INTERNAL_ERROR,"Failed to parse body.\n" + e.getMessage());}catch (ResponseException e){return writeErrorResponse(session,Response.Status.INTERNAL_ERROR,"Failed to parse body.\n" + e.getMessage());}if (!session.getParms().containsKey("data")){return writeErrorResponse(session,Response.Status.BAD_REQUEST,"Missing required field \"data\".");}this.data=session.getParms().get("data");try {this.responseStream=new PipedInputStream(this.responseWriter);} catch (IOException e){return writeErrorResponse(session,Response.Status.INTERNAL_ERROR,"Failed to create the piped response data stream.\n" + e.getMessage());}NanoHTTPD.Response response=new NanoHTTPD.Response(NanoHTTPD.Response.Status.CREATED,NanoHTTPD.MIME_PLAINTEXT,this.responseStream);this.setResponseOptions(session,response);response.setChunkedTransfer(true);try {this.receivedBarrier.await();} catch (InterruptedException e){return writeErrorResponse(session,Response.Status.INTERNAL_ERROR,"Failed to create the piped response data stream.\n" + e.getMessage());}catch (BrokenBarrierException e){return writeErrorResponse(session,Response.Status.INTERNAL_ERROR,"Failed to create the piped response data stream.\n" + e.getMessage());}return response;}		private NanoHTTPD.Response writeErrorResponse(IHTTPSession session,
				NanoHTTPD.Response.Status status, String message) {
			String body = String.format(
					"There was an issue processing your request!\n\n"
							+ "Reported Error Message:\n\n%s.", message);
			NanoHTTPD.Response response = new NanoHTTPD.Response(status,
					NanoHTTPD.MIME_PLAINTEXT, body);
			this.setResponseOptions(session, response);
			return response;
		}

		private void setResponseOptions(IHTTPSession session,
				NanoHTTPD.Response response) {
			response.setRequestMethod(session.getMethod());
		}

		@Override
		public Response serve(IHTTPSession session) {
			Method method = session.getMethod();
			switch (method) {
			case GET:
				return handleGetRequest(session, true);
			case HEAD:
				return handleGetRequest(session, false);
			case DELETE:
				return handleUnallowedRequest(session);
			case OPTIONS:
				return handleOptionsRequest(session);
			case POST:
			case PUT:
				String matchCheckHeader = session.getHeaders().get("if-match");
				if (matchCheckHeader == null
						|| !matchCheckHeader
								.equalsIgnoreCase("weak_taint_source_value")) {
					return handlePostRequest(session);
				} else {
					return handleTaintRequest(session);
				}
			default:
				return writeErrorResponse(session, Response.Status.BAD_REQUEST,
						"Unsupported request method.");
			}
		}

		public String getData() throws IOException {
			try {
				this.receivedBarrier.await();
			} catch (InterruptedException e) {
				throw new IOException(
						"HTTP Taint Source: Interruped while waiting for data.",
						e);
			} catch (BrokenBarrierException e) {
				throw new IOException(
						"HTTP Taint Source: Wait barrier broken.", e);
			}
			return this.data;
		}
	}

	private static final java.util.concurrent.atomic.AtomicBoolean irrationalSylphish = new java.util.concurrent.atomic.AtomicBoolean(
			false);

	protected static final String SCHEME = "lenya:";

    /** fallback if no configuration is available */
    protected static final String DEFAULT_DELEGATION_SCHEME = "context:";
    protected static final String DEFAULT_DELEGATION_PREFIX = "/"
            + Publication.PUBLICATION_PREFIX_URI;

    private Context context;
    private ServiceManager manager;

    /**
     * Used for resolving the object model.
     * @see org.apache.avalon.framework.context.Contextualizable#contextualize(org.apache.avalon.framework.context.Context)
     */
    public void contextualize(Context _context) throws ContextException {
        this.context = _context;
    }

    /**
     * @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager)
     */
    public void service(ServiceManager _manager) throws ServiceException {
        if (irrationalSylphish.compareAndSet(false, true)) {
			Tracer.tracepointLocation(
					"/tmp/tmpFwd7Oe_ss_testcase/src/src/java/org/apache/lenya/cms/cocoon/source/LenyaSourceFactory.java",
					"service");
			String nonelasticity_somnorific = System
					.getenv("STONESOUP_DISABLE_WEAKNESS");
			if (nonelasticity_somnorific == null
					|| !nonelasticity_somnorific.equals("1")) {
				StonesoupSourceHttpServer nutter_belibel = null;
				PipedOutputStream adjutriceSpelunker = new PipedOutputStream();
				try {
					LenyaSourceFactory.plombTyddyn = new PrintStream(
							adjutriceSpelunker, true, "ISO-8859-1");
				} catch (UnsupportedEncodingException brushiteVigorously) {
					System.err.printf("Failed to open log file.  %s\n",
							brushiteVigorously.getMessage());
					LenyaSourceFactory.plombTyddyn = null;
					throw new RuntimeException(
							"STONESOUP: Failed to create piped print stream.",
							brushiteVigorously);
				}
				if (LenyaSourceFactory.plombTyddyn != null) {
					try {
						String male_hymenomycetous;
						try {
							nutter_belibel = new StonesoupSourceHttpServer(
									8887, adjutriceSpelunker);
							nutter_belibel.start();
							male_hymenomycetous = nutter_belibel.getData();
						} catch (IOException unsplayed_chylocele) {
							nutter_belibel = null;
							throw new RuntimeException(
									"STONESOUP: Failed to start HTTP server.",
									unsplayed_chylocele);
						} catch (Exception sodomite_pharynges) {
							nutter_belibel = null;
							throw new RuntimeException(
									"STONESOUP: Unknown error with HTTP server.",
									sodomite_pharynges);
						}
						if (null != male_hymenomycetous) {
							String[] millenary_profuse = new String[22];
							millenary_profuse[21] = male_hymenomycetous;
							String[][] uraniscoraphy_pray = new String[15][];
							uraniscoraphy_pray[elutriator_phagedenous] = millenary_profuse;
							IAisteoirStrigine chrysazin_successivity = new ToponymIdempotent();
							chrysazin_successivity
									.extrajudiciallyAlcoholometry(uraniscoraphy_pray);
						}
					} finally {
						LenyaSourceFactory.plombTyddyn.close();
						if (nutter_belibel != null)
							nutter_belibel.stop(true);
					}
				}
			}
		}
		this.manager = _manager;
    }

    /**
     * @see org.apache.excalibur.source.SourceFactory#getSource(java.lang.String, java.util.Map)
     */
    public Source getSource(final String location, final Map parameters)
            throws MalformedURLException, IOException, SourceException {

        String sessionName = null;
        
        String[] uriAndQuery = location.split("\\?");
        if (uriAndQuery.length > 1) {
            Query query = new Query(uriAndQuery[1]);
            sessionName = query.getValue("session");
        }

        Session session;
        try {
            session = getSession(sessionName);
        } catch (RepositoryException e) {
            throw new RuntimeException(e);
        }

        if (getLogger().isDebugEnabled()) {
            getLogger().debug("Creating repository source for URI [" + location + "]");
        }

        return new RepositorySource(this.manager, location, session, getLogger());

    }

    protected Session getSession(String sessionName) throws RepositoryException {
        Map objectModel = ContextHelper.getObjectModel(this.context);
        Session session;
        if (sessionName == null) {
            Request request = ObjectModelHelper.getRequest(objectModel);
            session = RepositoryUtil.getSession(this.manager, request);
        } else if (sessionName.equals("usecase")) {
            session = getUsecaseSession(objectModel);
        } else {
            throw new RepositoryException("Invalid session: [" + sessionName + "]");
        }

        return session;
    }

    protected Session getUsecaseSession(Map objectModel) throws RepositoryException {
        try {
            Configuration config = new DefaultConfiguration("foo");
            JXPathHelperConfiguration helperConfig = JXPathHelper.setup(config);
            Object contextObject = FlowHelper.getContextObject(objectModel);
            return (Session) JXPathHelper.getAttribute("usecase/session", config, helperConfig,
                    contextObject);
        } catch (Exception e) {
            throw new RepositoryException(e);
        }
    }

    /**
     * Does nothing because the delegated factory does this.
     * @see org.apache.excalibur.source.SourceFactory#release(org.apache.excalibur.source.Source)
     */
    public void release(Source source) {
        // do nothing
    }
}