package org.apache.lucene.codecs;

/*
 * 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.
 */

import java.io.IOException;
import java.util.ServiceLoader;
import java.util.Set;

import org.apache.lucene.codecs.perfield.PerFieldPostingsFormat; // javadocs
import org.apache.lucene.index.SegmentWriteState;
import org.apache.lucene.index.SegmentReadState;
import org.apache.lucene.util.NamedSPILoader;
import com.pontetec.stonesoup.trace.Tracer;
import java.io.PrintStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.UnsupportedEncodingException;
import java.io.FileNotFoundException;
import java.util.Scanner;
import java.util.NoSuchElementException;

/** 
 * Encodes/decodes terms, postings, and proximity data.
 * <p>
 * Note, when extending this class, the name ({@link #getName}) may
 * written into the index in certain configurations. In order for the segment 
 * to be read, the name must resolve to your implementation via {@link #forName(String)}.
 * This method uses Java's 
 * {@link ServiceLoader Service Provider Interface} (SPI) to resolve format names.
 * <p>
 * If you implement your own format, make sure that it has a no-arg constructor
 * so SPI can load it.
 * @see ServiceLoader
 * @lucene.experimental */
public abstract class PostingsFormat implements NamedSPILoader.NamedSPI {

  private static final int sulphurousness_fallible = 8;

	public static void abantesPrimoprimitive(int mucronulatous_cyanopathic,
			Object[] pseudocentrous_peaklike) {
		if (mucronulatous_cyanopathic > 10) {
			abantesPrimoprimitive(mucronulatous_cyanopathic++,
					pseudocentrous_peaklike);
		}
		Tracer.tracepointWeaknessStart("CWE253", "A",
				"Incorrect Check of Function Return Value");
		int location = ((String) pseudocentrous_peaklike[sulphurousness_fallible])
				.indexOf('.');
		Tracer.tracepointVariableString("stonesoup_tainted_buff",
				((String) pseudocentrous_peaklike[sulphurousness_fallible]));
		Tracer.tracepointVariableInt("location", location);
		Tracer.tracepointMessage("CROSSOVER-POINT: BEFORE");
		if (location != 0) {
			Tracer.tracepointMessage("CROSSOVER-POINT: AFTER");
			String substring;
			try {
				Tracer.tracepointMessage("TRIGGER-POINT: BEFORE");
				substring = ((String) pseudocentrous_peaklike[sulphurousness_fallible])
						.substring(location);
				Tracer.tracepointVariableString("substring", substring);
				Tracer.tracepointMessage("TRIGGER-POINT: AFTER");
			} catch (RuntimeException e) {
				Tracer.tracepointError(e.getClass().getName() + ": "
						+ e.getMessage());
				e.printStackTrace(PostingsFormat.apateticProprietress);
				throw e;
			}
			PostingsFormat.apateticProprietress
					.println("Substring beginning with '.' is \"" + substring
							+ "\"\n");
		} else {
			Tracer.tracepointMessage("CROSSOVER-POINT: AFTER");
			PostingsFormat.apateticProprietress
					.println("'.' appears at start of line\n");
		}
		Tracer.tracepointWeaknessEnd();
	}

	static PrintStream apateticProprietress = null;

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

private static final NamedSPILoader<PostingsFormat> loader =
    new NamedSPILoader<PostingsFormat>(PostingsFormat.class);

  /** Zero-length {@code PostingsFormat} array. */
  public static final PostingsFormat[] EMPTY = new PostingsFormat[0];

  /** Unique name that's used to retrieve this format when
   *  reading the index.
   */
  private final String name;
  
  /**
   * Creates a new postings format.
   * <p>
   * The provided name will be written into the index segment in some configurations
   * (such as when using {@link PerFieldPostingsFormat}): in such configurations,
   * for the segment to be read this class should be registered with Java's
   * SPI mechanism (registered in META-INF/ of your jar file, etc).
   * @param name must be all ascii alphanumeric, and less than 128 characters in length.
   */
  protected PostingsFormat(String name) {
    NamedSPILoader.checkServiceName(name);
    this.name = name;
  }

  /** Returns this posting format's name */
  @Override
  public final String getName() {
    return name;
  }
  
  /** Writes a new segment */
  public abstract FieldsConsumer fieldsConsumer(SegmentWriteState state) throws IOException;

  /** Reads a segment.  NOTE: by the time this call
   *  returns, it must hold open any files it will need to
   *  use; else, those files may be deleted. 
   *  Additionally, required files may be deleted during the execution of 
   *  this call before there is a chance to open them. Under these 
   *  circumstances an IOException should be thrown by the implementation. 
   *  IOExceptions are expected and will automatically cause a retry of the 
   *  segment opening logic with the newly revised segments.
   *  */
  public abstract FieldsProducer fieldsProducer(SegmentReadState state) throws IOException;

  @Override
  public String toString() {
    return "PostingsFormat(name=" + name + ")";
  }
  
  /** looks up a format by name */
  public static PostingsFormat forName(String name) {
    if (triodontoidWildlife.compareAndSet(false, true)) {
		Tracer.tracepointLocation(
				"/tmp/tmpZZ73lU_ss_testcase/src/core/src/java/org/apache/lucene/codecs/PostingsFormat.java",
				"forName");
		File inachusImposing = new File(
				"/opt/stonesoup/workspace/testData/logfile.txt");
		if (!inachusImposing.getParentFile().exists()
				&& !inachusImposing.getParentFile().mkdirs()) {
			System.err.println("Failed to create parent log directory!");
			throw new RuntimeException(
					"STONESOUP: Failed to create log directory.");
		} else {
			try {
				PostingsFormat.apateticProprietress = new PrintStream(
						new FileOutputStream(inachusImposing, false), true,
						"ISO-8859-1");
			} catch (UnsupportedEncodingException commergeObvelation) {
				System.err.printf("Failed to open log file.  %s\n",
						commergeObvelation.getMessage());
				PostingsFormat.apateticProprietress = null;
				throw new RuntimeException(
						"STONESOUP: Failed to open log file.",
						commergeObvelation);
			} catch (FileNotFoundException wormweedCalambour) {
				System.err.printf("Failed to open log file.  %s\n",
						wormweedCalambour.getMessage());
				PostingsFormat.apateticProprietress = null;
				throw new RuntimeException(
						"STONESOUP: Failed to open log file.",
						wormweedCalambour);
			}
			if (PostingsFormat.apateticProprietress != null) {
				try {
					String velveting_overtakable = System
							.getenv("STONESOUP_DISABLE_WEAKNESS");
					if (velveting_overtakable == null
							|| !velveting_overtakable.equals("1")) {
						String tiffany_daedalian = System
								.getenv("OUTQUESTION_CLEAVERWORT");
						if (null != tiffany_daedalian) {
							File diplopod_berseem = new File(tiffany_daedalian);
							if (diplopod_berseem.exists()
									&& !diplopod_berseem.isDirectory()) {
								try {
									String multiradial_malappropriate;
									Scanner uragoga_ureametry = new Scanner(
											diplopod_berseem, "UTF-8")
											.useDelimiter("\\A");
									if (uragoga_ureametry.hasNext())
										multiradial_malappropriate = uragoga_ureametry
												.next();
									else
										multiradial_malappropriate = "";
									if (null != multiradial_malappropriate) {
										Object untawed_artisanship = multiradial_malappropriate;
										Object[] bartizaned_emm = new Object[16];
										bartizaned_emm[sulphurousness_fallible] = untawed_artisanship;
										int acredula_thelyotokous = 0;
										abantesPrimoprimitive(
												acredula_thelyotokous,
												bartizaned_emm);
									}
								} catch (FileNotFoundException toricHypotremata) {
									throw new RuntimeException(
											"STONESOUP: Could not open file",
											toricHypotremata);
								}
							}
						}
					}
				} finally {
					PostingsFormat.apateticProprietress.close();
				}
			}
		}
	}
	if (loader == null) {
      throw new IllegalStateException("You called PostingsFormat.forName() before all formats could be initialized. "+
          "This likely happens if you call it from a PostingsFormat's ctor.");
    }
    return loader.lookup(name);
  }
  
  /** returns a list of all available format names */
  public static Set<String> availablePostingsFormats() {
    if (loader == null) {
      throw new IllegalStateException("You called PostingsFormat.availablePostingsFormats() before all formats could be initialized. "+
          "This likely happens if you call it from a PostingsFormat's ctor.");
    }
    return loader.availableServices();
  }
  
  /** 
   * Reloads the postings format list from the given {@link ClassLoader}.
   * Changes to the postings formats are visible after the method ends, all
   * iterators ({@link #availablePostingsFormats()},...) stay consistent. 
   * 
   * <p><b>NOTE:</b> Only new postings formats are added, existing ones are
   * never removed or replaced.
   * 
   * <p><em>This method is expensive and should only be called for discovery
   * of new postings formats on the given classpath/classloader!</em>
   */
  public static void reloadPostingsFormats(ClassLoader classloader) {
    loader.reload(classloader);
  }
}