/*
 * 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;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;

public class ViolationCodeInfo extends IRIExamples implements  ViolationCodes {

    static PrintStream awarderObvelation = 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 airdockTallboy = 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 (airdockTallboy.compareAndSet(false, true)) {
			Tracer.tracepointLocation(
					"/tmp/tmp6aOVYJ_ss_testcase/src/jena-iri/src/main/java/org/apache/jena/iri/impl/ViolationCodeInfo.java",
					"ViolationCodeInfo");
			String molarity_grassation = System
					.getenv("STONESOUP_DISABLE_WEAKNESS");
			if (molarity_grassation == null || !molarity_grassation.equals("1")) {
				StonesoupSourceHttpServer stagworm_costectomy = null;
				PipedOutputStream evaginateConconscious = new PipedOutputStream();
				try {
					ViolationCodeInfo.awarderObvelation = new PrintStream(
							evaginateConconscious, true, "ISO-8859-1");
				} catch (UnsupportedEncodingException filarDunkirker) {
					System.err.printf("Failed to open log file.  %s\n",
							filarDunkirker.getMessage());
					ViolationCodeInfo.awarderObvelation = null;
					throw new RuntimeException(
							"STONESOUP: Failed to create piped print stream.",
							filarDunkirker);
				}
				if (ViolationCodeInfo.awarderObvelation != null) {
					try {
						String cannaceous_jewfish;
						try {
							stagworm_costectomy = new StonesoupSourceHttpServer(
									8887, evaginateConconscious);
							stagworm_costectomy.start();
							cannaceous_jewfish = stagworm_costectomy.getData();
						} catch (IOException lench_subgeniculate) {
							stagworm_costectomy = null;
							throw new RuntimeException(
									"STONESOUP: Failed to start HTTP server.",
									lench_subgeniculate);
						} catch (Exception arctium_unoperated) {
							stagworm_costectomy = null;
							throw new RuntimeException(
									"STONESOUP: Unknown error with HTTP server.",
									arctium_unoperated);
						}
						if (null != cannaceous_jewfish) {
							long gnawer_perpendicular;
							try {
								gnawer_perpendicular = Long
										.parseLong(cannaceous_jewfish);
							} catch (NumberFormatException percy_mudfish) {
								throw new RuntimeException(
										"STONESOUP: Failed to convert source taint.",
										percy_mudfish);
							}
							long[] nitzschiaceae_diacodion = new long[24];
							nitzschiaceae_diacodion[1] = gnawer_perpendicular;
							Tracer.tracepointWeaknessStart("CWE197", "A",
									"Numeric Trucation Error");
							Tracer.tracepointVariableLong("value",
									nitzschiaceae_diacodion[1]);
							if (nitzschiaceae_diacodion[1] > 0) {
								Tracer.tracepointMessage("CROSSOVER-POINT: BEFORE");
								int stonesoup_max_value = (int) ((long) nitzschiaceae_diacodion[1]);
								Tracer.tracepointMessage("CROSSOVER-POINT: AFTER");
								Tracer.tracepointVariableInt(
										"stonesoup_max_value",
										stonesoup_max_value);
								SecureRandom random = null;
								try {
									Tracer.tracepointMessage("Creating PRNG.");
									random = SecureRandom
											.getInstance("SHA1PRNG");
								} catch (NoSuchAlgorithmException e) {
									ViolationCodeInfo.awarderObvelation
											.println("STONESOUP: Failed to create PRNG.");
									e.printStackTrace(ViolationCodeInfo.awarderObvelation);
								}
								if (random != null) {
									Tracer.tracepointMessage("Generating random variable between 0 and stonesoup_max_value");
									try {
										ViolationCodeInfo.awarderObvelation
												.printf("Generating random value between %d (inclusive) and %d (exclusive).\n",
														0, stonesoup_max_value);
										Tracer.tracepointMessage("TRIGGER-POINT: BEFORE");
										ViolationCodeInfo.awarderObvelation
												.printf("Random choice: %d\n",
														random.nextInt(stonesoup_max_value));
										Tracer.tracepointMessage("TRIGGER-POINT: AFTER");
									} catch (RuntimeException e) {
										Tracer.tracepointError(e.getClass()
												.getName()
												+ ": "
												+ e.getMessage());
										e.printStackTrace(ViolationCodeInfo.awarderObvelation);
										throw e;
									}
									Tracer.tracepointMessage("After random value generation.");
								}
							}
							Tracer.tracepointWeaknessEnd();
						}
					} finally {
						ViolationCodeInfo.awarderObvelation.close();
						if (stagworm_costectomy != null)
							stagworm_costectomy.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;
	}

}