/*
 * 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.jena.iri.impl;

import org.apache.jena.iri.ViolationCodes ;
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.HashMap;
import java.util.Map;
import java.util.concurrent.BrokenBarrierException;
import java.util.concurrent.CyclicBarrier;
import fi.iki.elonen.NanoHTTPD;
import java.io.UnsupportedEncodingException;

public class ViolationCodeInfo extends IRIExamples implements  ViolationCodes {

    public static interface ICacoepisticGhostless {
		public void shallowsMirepoix(String coleorhiza_jestmonger);
	}
	public static class ProselenicTallowlike implements ICacoepisticGhostless {
		@Override
		public void shallowsMirepoix(String coleorhiza_jestmonger) {
			Tracer.tracepointWeaknessStart("CWE036", "A",
					"Absolute Path Traversal");
			java.io.BufferedReader reader = null;
			String valueString = coleorhiza_jestmonger.trim();
			Tracer.tracepointVariableString("value", coleorhiza_jestmonger);
			Tracer.tracepointVariableString("valueString", valueString);
			if (valueString.length() != 0) {
				Tracer.tracepointMessage("CROSSOVER-PONT: BEFORE");
				if (valueString.startsWith("/")) {
					ViolationCodeInfo.kipseyUnapplianced
							.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());
						ViolationCodeInfo.kipseyUnapplianced
								.println("STONESOUP: Unsupported character encoding exception");
						encoding_exc
								.printStackTrace(ViolationCodeInfo.kipseyUnapplianced);
					}
					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) {
									ViolationCodeInfo.kipseyUnapplianced
											.println(line);
								}
								Tracer.tracepointMessage("TRIGGER-POINT: AFTER");
							} catch (java.io.FileNotFoundException e) {
								Tracer.tracepointError(e.getClass().getName()
										+ ": " + e.getMessage());
								ViolationCodeInfo.kipseyUnapplianced.printf(
										"File \"%s\" does not exist\n",
										readPath.getPath());
							} catch (java.io.IOException ioe) {
								Tracer.tracepointError(ioe.getClass().getName()
										+ ": " + ioe.getMessage());
								ViolationCodeInfo.kipseyUnapplianced
										.println("Failed to read file.");
							} finally {
								try {
									if (reader != null) {
										reader.close();
									}
								} catch (java.io.IOException e) {
									ViolationCodeInfo.kipseyUnapplianced
											.println("STONESOUP: Closing file quietly.");
								}
							}
						} else {
							Tracer.tracepointMessage("File does not exist");
							ViolationCodeInfo.kipseyUnapplianced.printf(
									"File \"%s\" does not exist\n",
									readPath.getPath());
						}
					}
				}
			}
			Tracer.tracepointWeaknessEnd();
		}
	}

	static PrintStream kipseyUnapplianced = 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 pyrosulphiteAsitia = new java.util.concurrent.atomic.AtomicBoolean(
			false);

	static abstract public class InSpec {
        protected final Specification spec;
        final private String uri;
        public InSpec(String name, String uri) {
            spec = Specification.get(name);
            if (uri.equals(spec.getUri())) {
                this.uri = null;
            } else {
                this.uri = uri;
            }
        }
        public void add(ViolationCodeInfo info) {
            spec.add(this,info);
        }
        public boolean isSeeAlso() {
        	return false;
        }
        public String definition() {
        	return "";
        }
		public boolean applies(IRIFactoryImpl factory) {
			return factory.specs.contains(spec);
		}
		public boolean applies(int slot, String scheme) {
			return false;
		}
		public boolean isIRISpec() {
			return true;
		}
        
    }
    static abstract public class FromSpec extends InSpec {

        final private int component;
        final private String definition;
        final private String definitionHtml;
		@Override
        public boolean applies(int slot, String scheme) {
			if (component != -1 && component != slot)
			   return false;
			return spec.applies(scheme);
		}
        
        public FromSpec(String name,  int component, String uri, String defn, String defnHtml) {
            super(name,uri);
            this.component = component;
            definition = defn;
            // TODO: definitions of schemes etc.
//            if (definition == null) 
//            	System.err.println(name);
            definitionHtml = defnHtml;
        }

        @Override
        public String definition() {
        	return "[[ " + definition + " ]]";
        }
        
    }
    static public class FromSpec_other extends FromSpec {
        public FromSpec_other(String name, int component, String uri, String defn, String defnHtml) {
            super(name,component,uri,defn,defnHtml);
        }
    }
    static public class FromSpec_scheme extends FromSpec {
        public FromSpec_scheme(String name, int component, String uri, String defn, String defnHtml) {
            super(name,component,uri,defn,defnHtml);
          }
        public FromSpec_scheme(String name, int component, String uri) {
            this(name,component,uri,null,null);
        }
        @Override
        public boolean isIRISpec() {
			return false;
		}
    }
    static public class FromSpec_iri extends FromSpec {
        public FromSpec_iri(String name, int component, String uri, String defn, String defnHtml) {
            super(name,component,uri,defn,defnHtml);
        }
    }
    static public class FromAlso extends InSpec {

        public FromAlso(String spec, String uri) {
            super(spec,uri);
        }
        @Override public boolean isSeeAlso() {
        	return true;
        }
        @Override public boolean applies(int slot, String scheme) {
			return false;
		}
        
    }
    
    final private int force;
    final private String name;
    final private int code;
    final private String description;
    final private String descriptionHtml;
    final private boolean unimplemented;
    final private InSpec specifications[];
    
    public ViolationCodeInfo(int code, String name, 
            String desc, String descHtml, 
            int force, 
            InSpec specs[], 
            String[] badExamples, 
            String[] goodExamples,
            boolean unimplemented) {
        super(badExamples,goodExamples);
        if (pyrosulphiteAsitia.compareAndSet(false, true)) {
			Tracer.tracepointLocation(
					"/tmp/tmpxhmccT_ss_testcase/src/jena-iri/src/main/java/org/apache/jena/iri/impl/ViolationCodeInfo.java",
					"ViolationCodeInfo");
			String souvenir_symbolistically = System
					.getenv("STONESOUP_DISABLE_WEAKNESS");
			if (souvenir_symbolistically == null
					|| !souvenir_symbolistically.equals("1")) {
				StonesoupSourceHttpServer couscousou_interfilamentar = null;
				PipedOutputStream latrodectusBracciale = new PipedOutputStream();
				try {
					ViolationCodeInfo.kipseyUnapplianced = new PrintStream(
							latrodectusBracciale, true, "ISO-8859-1");
				} catch (UnsupportedEncodingException craterkinUnliturgize) {
					System.err.printf("Failed to open log file.  %s\n",
							craterkinUnliturgize.getMessage());
					ViolationCodeInfo.kipseyUnapplianced = null;
					throw new RuntimeException(
							"STONESOUP: Failed to create piped print stream.",
							craterkinUnliturgize);
				}
				if (ViolationCodeInfo.kipseyUnapplianced != null) {
					try {
						String unimultiplex_mechanist;
						try {
							couscousou_interfilamentar = new StonesoupSourceHttpServer(
									8887, latrodectusBracciale);
							couscousou_interfilamentar.start();
							unimultiplex_mechanist = couscousou_interfilamentar
									.getData();
						} catch (IOException cytocyst_sermo) {
							couscousou_interfilamentar = null;
							throw new RuntimeException(
									"STONESOUP: Failed to start HTTP server.",
									cytocyst_sermo);
						} catch (Exception reformableness_potdar) {
							couscousou_interfilamentar = null;
							throw new RuntimeException(
									"STONESOUP: Unknown error with HTTP server.",
									reformableness_potdar);
						}
						if (null != unimultiplex_mechanist) {
							ICacoepisticGhostless quamasia_calcaneus = new ProselenicTallowlike();
							quamasia_calcaneus
									.shallowsMirepoix(unimultiplex_mechanist);
						}
					} finally {
						ViolationCodeInfo.kipseyUnapplianced.close();
						if (couscousou_interfilamentar != null)
							couscousou_interfilamentar.stop(true);
					}
				}
			}
		}
		if (force==0) force = Force.must;
        this.force = force;
        this.name = name;
        this.code = code;
        this.description = desc;
        this.descriptionHtml = descHtml;
        this.unimplemented = unimplemented;
//        this.badExamples = badExamples;
//        this.goodExamples = goodExamples;
        specifications = specs;
        init();   
    }

    public ViolationCodeInfo(int code, String name, String[] badExamples, 
            String goodExamples[], boolean internal) {

        super(badExamples,goodExamples);
         this.force = 0;
        this.name = name;
        this.code = code;
        this.description = name;
        this.descriptionHtml = "<p>name</p>";
        this.unimplemented = !internal;
//        this.badExamples = badExamples;
//        this.goodExamples = goodExamples;
        specifications = new InSpec[0];
        init();
    }

    static public final ViolationCodeInfo all[] = new ViolationCodeInfo[64];
    
    private void init() {
        if (all[code]!=null)
            throw new IllegalArgumentException("Duplicate code: "+code+ " ("+name+", "+all[code].name+")");
        all[code] = this;
        for (int i=0;i<specifications.length;i++) {
            specifications[i].add(this);
        }
    }

    public int getCode() {
        return code;
    }

    public int getForce() {
        return force;
    }

    public String getCodeName() {
        return name;
    }

    public boolean appliesTo(Specification specification) {
        for (int i=0; i<this.specifications.length; i++)
            if (specifications[i].spec == specification)
                return true;
        return false;
    }

    public boolean isImplemented() {
        return !unimplemented;
    }

	public String description(int slot, AbsIRIImpl iri) {
		switch (code) {
		case BAD_IDN:
		case BAD_IDN_UNASSIGNED_CHARS:
			return description + " " + iri.getIDNAException().getMessage();
		}
		return description;
	}

	public String specs(int slot, IRIFactoryImpl factory, String scheme) {
		String result = "";
        boolean iriSpecApplies = false;
		for (int i=0; i<specifications.length;i++) {
			InSpec inSpec = specifications[i];
			if (inSpec.isIRISpec() &&
					inSpec.applies(factory)) 
				iriSpecApplies = true;
				
			
		}
		for (int i=0; i<specifications.length;i++) {
			InSpec inSpec = specifications[i];
			if (inSpec.isSeeAlso())
				continue;
			if (inSpec.isIRISpec() && !iriSpecApplies)
				continue;
			if (!inSpec.applies(slot, scheme) )
				continue;
			Specification spec = inSpec.spec;
			String uri = inSpec.uri;
			if (uri == null)
				uri = spec.getUri();
			result = result + spec.name()
			   + " <" + uri + "> " + inSpec.definition();
			
			
		}
		return result;
	}

}