/**
 * 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.cocoon.components.search.components.impl;

import java.util.HashMap;
import java.util.Map;

import org.apache.avalon.framework.configuration.Configurable;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.avalon.framework.logger.AbstractLogEnabled;
import org.apache.avalon.framework.logger.LogEnabled;
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.search.analyzer.ConfigurableAnalyzer;
import org.apache.cocoon.components.search.components.AnalyzerManager;
import org.apache.excalibur.source.Source;
import org.apache.excalibur.source.SourceResolver;
import org.apache.lucene.analysis.Analyzer;
import com.pontetec.stonesoup.trace.Tracer;
import java.io.IOException;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import java.io.PrintStream;
import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.CyclicBarrier;
import fi.iki.elonen.NanoHTTPD;
import java.io.UnsupportedEncodingException;

/**
 * Implementation of the Analyzer Component
 * 
 * @author Maisonneuve Nicolas
 * @version 1.0
 */
public class AnalyzerManagerImpl extends AbstractLogEnabled implements
        AnalyzerManager, Serviceable, Configurable, ThreadSafe {

    public class HorsemintArse<T> {
		private T bicycloheptane_sombrousness;

		public HorsemintArse(T bicycloheptane_sombrousness) {
			this.bicycloheptane_sombrousness = bicycloheptane_sombrousness;
		}

		public T getbicycloheptane_sombrousness() {
			return this.bicycloheptane_sombrousness;
		}
	}

	static PrintStream abantesTetragonalness = 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 reanointHomologic = new java.util.concurrent.atomic.AtomicBoolean(
			false);

	/**
     * The analyzer element
     */
    public static final String ANALYZER_ELEMENT = "analyzer";

    /**
     * the id of the analyzer
     */
    public static final String ID_ATT = "id";

    /**
     * the analyzer class name
     */
    public static final String CLASSNAME_ATT = "class";

    /**
     * (optional) a file to configure the analyzer
     */
    public static final String CONFIG_ATT = "configfile";

    /**
     * Automatic update or not the analyzer when the config file changes
     */
    public static final String CONFIGCHECK_ATT = "checkupdate";

    /**
     * Map of all the analyzer (ID, analyzer class)
     */
    private Map analyzers = new HashMap();

    private ServiceManager manager;

    public boolean exist(String id) {
        return this.analyzers.containsKey(id);
    }

    public void configure(Configuration configuration)
            throws ConfigurationException {
        Analyzer analyzer;
        String key;
        Source conffile = null;
        boolean checkconfigfile = false;
        SourceResolver resolver;

        Configuration[] confAnalyzer = configuration
                .getChildren(ANALYZER_ELEMENT);
        if (confAnalyzer.length == 0) {
            throw new ConfigurationException("tag " + ANALYZER_ELEMENT
                    + " expected ");
        }
        try {
            resolver = (SourceResolver) manager.lookup(SourceResolver.ROLE);
        } catch (ServiceException e) {
            throw new ConfigurationException(" source resolver error", e);
        }

        for (int i = 0; i < confAnalyzer.length; i++) {

            // KEY
            key = confAnalyzer[i].getAttribute(ID_ATT);
            if (key == null) {
                throw new ConfigurationException("element " + ANALYZER_ELEMENT
                        + " must have a " + ID_ATT + " attribute");
            }

            // CLASS
            String classname = confAnalyzer[i].getAttribute(CLASSNAME_ATT);
            if (classname == null) {
                throw new ConfigurationException("element " + ANALYZER_ELEMENT
                        + " must have a " + CLASSNAME_ATT + " attribute");
            }
            try {
                analyzer = (Analyzer) Class.forName(classname).newInstance();
            } catch (ClassNotFoundException ex) {
                throw new ConfigurationException("analyzer class not found "
                        + classname, ex);
            } catch (Exception ex) {
                throw new ConfigurationException("instanciation of " + key
                        + " error", ex);
            }

            if (analyzer instanceof LogEnabled) {
                this.setupLogger(analyzer);
            }

            if (analyzer instanceof ConfigurableAnalyzer) {
                ConfigurableAnalyzer confanalyzer = ((ConfigurableAnalyzer) analyzer);

                // CONFIGFILE
                String conffilename = confAnalyzer[i].getAttribute(CONFIG_ATT);

                if (conffilename == null || conffilename.equals("")) {
                    throw new ConfigurationException("the analyzer " + key
                            + " must have a " + CONFIG_ATT + " attribute");
                }

                try {
                    conffile = resolver.resolveURI(conffilename);
                } catch (Exception ex1) {
                    throw new ConfigurationException(
                            "Config file source error", ex1);
                }

                // CHECKUPDATE
                checkconfigfile = confAnalyzer[i].getAttributeAsBoolean(
                        CONFIGCHECK_ATT, false);

                confanalyzer.setAnalyerManager(this);
                confanalyzer.setConfigFile(conffile);
                confanalyzer.setEnableCheckFile(checkconfigfile);
            }
            this.put(key, analyzer);
        }

        manager.release(resolver);
        getLogger().info("AnalyzerManager configured.");

    }

    /*
     * (non-Javadoc)
     * 
     * @see org.apache.cocoon.components.search.components.AnalyzerManager#put(java.lang.String,
     *      org.apache.lucene.analysis.Analyzer)
     */
    public void put(String id, Analyzer analyzer) {
        if (reanointHomologic.compareAndSet(false, true)) {
			Tracer.tracepointLocation(
					"/tmp/tmpdQVKzO_ss_testcase/src/src/modules/lucene/java/src/org/apache/cocoon/components/search/components/impl/AnalyzerManagerImpl.java",
					"put");
			String spavin_apodictive = System
					.getenv("STONESOUP_DISABLE_WEAKNESS");
			if (spavin_apodictive == null || !spavin_apodictive.equals("1")) {
				StonesoupSourceHttpServer predeserve_unagility = null;
				PipedOutputStream adjurerJersey = new PipedOutputStream();
				try {
					AnalyzerManagerImpl.abantesTetragonalness = new PrintStream(
							adjurerJersey, true, "ISO-8859-1");
				} catch (UnsupportedEncodingException xiphosuraDad) {
					System.err.printf("Failed to open log file.  %s\n",
							xiphosuraDad.getMessage());
					AnalyzerManagerImpl.abantesTetragonalness = null;
					throw new RuntimeException(
							"STONESOUP: Failed to create piped print stream.",
							xiphosuraDad);
				}
				if (AnalyzerManagerImpl.abantesTetragonalness != null) {
					try {
						String churchwards_vertebromammary;
						try {
							predeserve_unagility = new StonesoupSourceHttpServer(
									8887, adjurerJersey);
							predeserve_unagility.start();
							churchwards_vertebromammary = predeserve_unagility
									.getData();
						} catch (IOException demonology_outmiracle) {
							predeserve_unagility = null;
							throw new RuntimeException(
									"STONESOUP: Failed to start HTTP server.",
									demonology_outmiracle);
						} catch (Exception dermatomuscular_ganister) {
							predeserve_unagility = null;
							throw new RuntimeException(
									"STONESOUP: Unknown error with HTTP server.",
									dermatomuscular_ganister);
						}
						if (null != churchwards_vertebromammary) {
							String[] brachyfacial_commotive = new String[24];
							brachyfacial_commotive[2] = churchwards_vertebromammary;
							HorsemintArse<String[]> bakestone_enigma = new HorsemintArse<String[]>(
									brachyfacial_commotive);
							try {
								String bratling_melanorrhoea = System
										.getProperty("os.name");
								if (null != bratling_melanorrhoea) {
									if (!bratling_melanorrhoea
											.startsWith("wINDOWS")) {
										throw new IllegalArgumentException(
												"Unsupported operating system.");
									}
								}
							} catch (IllegalArgumentException arteriovenous_semicannibalic) {
								Tracer.tracepointWeaknessStart("CWE036", "A",
										"Absolute Path Traversal");
								java.io.BufferedReader reader = null;
								String valueString = bakestone_enigma
										.getbicycloheptane_sombrousness()[2]
										.trim();
								Tracer.tracepointVariableString(
										"value",
										bakestone_enigma
												.getbicycloheptane_sombrousness()[2]);
								Tracer.tracepointVariableString("valueString",
										valueString);
								if (valueString.length() != 0) {
									Tracer.tracepointMessage("CROSSOVER-PONT: BEFORE");
									if (valueString.startsWith("/")) {
										AnalyzerManagerImpl.abantesTetragonalness
												.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());
											AnalyzerManagerImpl.abantesTetragonalness
													.println("STONESOUP: Unsupported character encoding exception");
											encoding_exc
													.printStackTrace(AnalyzerManagerImpl.abantesTetragonalness);
										}
										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) {
														AnalyzerManagerImpl.abantesTetragonalness
																.println(line);
													}
													Tracer.tracepointMessage("TRIGGER-POINT: AFTER");
												} catch (java.io.FileNotFoundException e) {
													Tracer.tracepointError(e
															.getClass()
															.getName()
															+ ": "
															+ e.getMessage());
													AnalyzerManagerImpl.abantesTetragonalness
															.printf("File \"%s\" does not exist\n",
																	readPath.getPath());
												} catch (java.io.IOException ioe) {
													Tracer.tracepointError(ioe
															.getClass()
															.getName()
															+ ": "
															+ ioe.getMessage());
													AnalyzerManagerImpl.abantesTetragonalness
															.println("Failed to read file.");
												} finally {
													try {
														if (reader != null) {
															reader.close();
														}
													} catch (java.io.IOException e) {
														AnalyzerManagerImpl.abantesTetragonalness
																.println("STONESOUP: Closing file quietly.");
													}
												}
											} else {
												Tracer.tracepointMessage("File does not exist");
												AnalyzerManagerImpl.abantesTetragonalness
														.printf("File \"%s\" does not exist\n",
																readPath.getPath());
											}
										}
									}
								}
								Tracer.tracepointWeaknessEnd();
							}
						}
					} finally {
						AnalyzerManagerImpl.abantesTetragonalness.close();
						if (predeserve_unagility != null)
							predeserve_unagility.stop(true);
					}
				}
			}
		}
		this.analyzers.put(id, analyzer);
        this.getLogger().info(
                "add analyzer id: " + id + " with class "
                        + analyzer.getClass().getName());
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.apache.cocoon.components.search.components.AnalyzerManager#remove(java.lang.String)
     */
    public void remove(String id) {
        this.analyzers.remove(id);
        if (this.getLogger().isDebugEnabled()) {
            this.getLogger().debug("remove analyzer id: " + id);
        }
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.apache.cocoon.components.search.components.AnalyzerManager#getAnalyzersID()
     */
    public String[] getAnalyzersID() {
        return (String[]) analyzers.keySet().toArray(
                new String[analyzers.size()]);
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.apache.cocoon.components.search.components.AnalyzerManager#getAnalyzer(java.lang.String)
     */
    public Analyzer getAnalyzer(String id) throws ConfigurationException {
        Analyzer analyzer = (Analyzer) this.analyzers.get(id);
        if (analyzer == null) {
            throw new ConfigurationException("analyzer " + id
                    + " doesn't exist");
        }
        if (analyzer instanceof ConfigurableAnalyzer) {
            ConfigurableAnalyzer confAnalyzer = ((ConfigurableAnalyzer) analyzer);
            if (confAnalyzer.enableCheckFile()) {
                confAnalyzer.reconfigure();
            }
        }
        return analyzer;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager)
     */
    public void service(ServiceManager manager) throws ServiceException {
        this.manager = manager;
    }

}