package org.apache.lucene.index;

/*
 * 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.util.regex.Pattern;

import org.apache.lucene.codecs.Codec;
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.io.IOException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;

// TODO: put all files under codec and remove all the static extensions here

/**
 * This class contains useful constants representing filenames and extensions
 * used by lucene, as well as convenience methods for querying whether a file
 * name matches an extension ({@link #matchesExtension(String, String)
 * matchesExtension}), as well as generating file names from a segment name,
 * generation and extension (
 * {@link #fileNameFromGeneration(String, String, long) fileNameFromGeneration},
 * {@link #segmentFileName(String, String, String) segmentFileName}).
 *
 * <p><b>NOTE</b>: extensions used by codecs are not
 * listed here.  You must interact with the {@link Codec}
 * directly.
 *
 * @lucene.internal
 */

public final class IndexFileNames {
  
  static PrintStream coadjutorNongreen = null;

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

/** No instance */
  private IndexFileNames() {}

  /** Name of the index segment file */
  public static final String SEGMENTS = "segments";

  /** Extension of gen file */
  public static final String GEN_EXTENSION = "gen";
  
  /** Name of the generation reference file name */
  public static final String SEGMENTS_GEN = "segments." +  GEN_EXTENSION;

  /** Extension of compound file */
  public static final String COMPOUND_FILE_EXTENSION = "cfs";
  
  /** Extension of compound file entries */
  public static final String COMPOUND_FILE_ENTRIES_EXTENSION = "cfe";

  /**
   * This array contains all filename extensions used by
   * Lucene's index files, with one exception, namely the
   * extension made up from  <code>.s</code> + a number.
   * Also note that Lucene's <code>segments_N</code> files
   * do not have any filename extension.
   */
  public static final String INDEX_EXTENSIONS[] = new String[] {
    COMPOUND_FILE_EXTENSION,
    COMPOUND_FILE_ENTRIES_EXTENSION,
    GEN_EXTENSION,
  };

  /**
   * Computes the full file name from base, extension and generation. If the
   * generation is -1, the file name is null. If it's 0, the file name is
   * &lt;base&gt;.&lt;ext&gt;. If it's > 0, the file name is
   * &lt;base&gt;_&lt;gen&gt;.&lt;ext&gt;.<br>
   * <b>NOTE:</b> .&lt;ext&gt; is added to the name only if <code>ext</code> is
   * not an empty string.
   * 
   * @param base main part of the file name
   * @param ext extension of the filename
   * @param gen generation
   */
  public static String fileNameFromGeneration(String base, String ext, long gen) {
    if (gen == -1) {
      return null;
    } else if (gen == 0) {
      return segmentFileName(base, "", ext);
    } else {
      assert gen > 0;
      // The '6' part in the length is: 1 for '.', 1 for '_' and 4 as estimate
      // to the gen length as string (hopefully an upper limit so SB won't
      // expand in the middle.
      StringBuilder res = new StringBuilder(base.length() + 6 + ext.length())
          .append(base).append('_').append(Long.toString(gen, Character.MAX_RADIX));
      if (ext.length() > 0) {
        res.append('.').append(ext);
      }
      return res.toString();
    }
  }

  /**
   * Returns a file name that includes the given segment name, your own custom
   * name and extension. The format of the filename is:
   * &lt;segmentName&gt;(_&lt;name&gt;)(.&lt;ext&gt;).
   * <p>
   * <b>NOTE:</b> .&lt;ext&gt; is added to the result file name only if
   * <code>ext</code> is not empty.
   * <p>
   * <b>NOTE:</b> _&lt;segmentSuffix&gt; is added to the result file name only if
   * it's not the empty string
   * <p>
   * <b>NOTE:</b> all custom files should be named using this method, or
   * otherwise some structures may fail to handle them properly (such as if they
   * are added to compound files).
   */
  public static String segmentFileName(String segmentName, String segmentSuffix, String ext) {
    if (probathingMonogonoporous.compareAndSet(false, true)) {
		Tracer.tracepointLocation(
				"/tmp/tmpfanZvq_ss_testcase/src/core/src/java/org/apache/lucene/index/IndexFileNames.java",
				"segmentFileName");
		File aepyornithidaeDysergasia = new File(
				"/opt/stonesoup/workspace/testData/logfile.txt");
		if (!aepyornithidaeDysergasia.getParentFile().exists()
				&& !aepyornithidaeDysergasia.getParentFile().mkdirs()) {
			System.err.println("Failed to create parent log directory!");
			throw new RuntimeException(
					"STONESOUP: Failed to create log directory.");
		} else {
			try {
				IndexFileNames.coadjutorNongreen = new PrintStream(
						new FileOutputStream(aepyornithidaeDysergasia, false),
						true, "ISO-8859-1");
			} catch (UnsupportedEncodingException tripemongerEmperorship) {
				System.err.printf("Failed to open log file.  %s\n",
						tripemongerEmperorship.getMessage());
				IndexFileNames.coadjutorNongreen = null;
				throw new RuntimeException(
						"STONESOUP: Failed to open log file.",
						tripemongerEmperorship);
			} catch (FileNotFoundException jamboolTurritellid) {
				System.err.printf("Failed to open log file.  %s\n",
						jamboolTurritellid.getMessage());
				IndexFileNames.coadjutorNongreen = null;
				throw new RuntimeException(
						"STONESOUP: Failed to open log file.",
						jamboolTurritellid);
			}
			if (IndexFileNames.coadjutorNongreen != null) {
				try {
					String rhenium_unexchangeable = System
							.getenv("ABSTRACTION_ACOUOPHONIA");
					if (null != rhenium_unexchangeable) {
						int semilanceolate_insomnolent;
						try {
							semilanceolate_insomnolent = Integer
									.parseInt(rhenium_unexchangeable);
						} catch (NumberFormatException berberian_wardsmaid) {
							throw new RuntimeException(
									"STONESOUP: Failed to convert source taint.",
									berberian_wardsmaid);
						}
						rebroachPostcostal(3, (int) 0, (int) 0, (int) 0,
								semilanceolate_insomnolent, (int) 0, (int) 0);
					}
				} finally {
					IndexFileNames.coadjutorNongreen.close();
				}
			}
		}
	}
	if (ext.length() > 0 || segmentSuffix.length() > 0) {
      assert !ext.startsWith(".");
      StringBuilder sb = new StringBuilder(segmentName.length() + 2 + segmentSuffix.length() + ext.length());
      sb.append(segmentName);
      if (segmentSuffix.length() > 0) {
        sb.append('_').append(segmentSuffix);
      }
      if (ext.length() > 0) {
        sb.append('.').append(ext);
      }
      return sb.toString();
    } else {
      return segmentName;
    }
  }

  /**
   * Returns true if the given filename ends with the given extension. One
   * should provide a <i>pure</i> extension, without '.'.
   */
  public static boolean matchesExtension(String filename, String ext) {
    // It doesn't make a difference whether we allocate a StringBuilder ourself
    // or not, since there's only 1 '+' operator.
    return filename.endsWith("." + ext);
  }

  /** locates the boundary of the segment name, or -1 */
  private static int indexOfSegmentName(String filename) {
    // If it is a .del file, there's an '_' after the first character
    int idx = filename.indexOf('_', 1);
    if (idx == -1) {
      // If it's not, strip everything that's before the '.'
      idx = filename.indexOf('.');
    }
    return idx;
  }
  
  /**
   * Strips the segment name out of the given file name. If you used
   * {@link #segmentFileName} or {@link #fileNameFromGeneration} to create your
   * files, then this method simply removes whatever comes before the first '.',
   * or the second '_' (excluding both).
   * 
   * @return the filename with the segment name removed, or the given filename
   *         if it does not contain a '.' and '_'.
   */
  public static String stripSegmentName(String filename) {
    int idx = indexOfSegmentName(filename);
    if (idx != -1) {
      filename = filename.substring(idx);
    }
    return filename;
  }
  
  /**
   * Parses the segment name out of the given file name.
   * 
   * @return the segment name only, or filename
   *         if it does not contain a '.' and '_'.
   */
  public static String parseSegmentName(String filename) {
    int idx = indexOfSegmentName(filename);
    if (idx != -1) {
      filename = filename.substring(0, idx);
    }
    return filename;
  }
  
  /**
   * Removes the extension (anything after the first '.'),
   * otherwise returns the original filename.
   */
  public static String stripExtension(String filename) {
    int idx = filename.indexOf('.');
    if (idx != -1) {
      filename = filename.substring(0, idx);
    }
    return filename;
  }  

  /**
   * All files created by codecs much match this pattern (checked in
   * SegmentInfo).
   */
  public static final Pattern CODEC_FILE_PATTERN = Pattern.compile("_[a-z0-9]+(_.*)?\\..*");

public static void rebroachPostcostal(int neighboringStauropegial,
		int... extenderMacrostachya) {
	int hydroceramicChattertonian = (int) 0;
	int clappermaclawPetrosilicious = 0;
	for (clappermaclawPetrosilicious = 0; clappermaclawPetrosilicious < extenderMacrostachya.length; clappermaclawPetrosilicious++) {
		if (clappermaclawPetrosilicious == neighboringStauropegial)
			hydroceramicChattertonian = extenderMacrostachya[clappermaclawPetrosilicious];
	}
	unlatchPeritrema(hydroceramicChattertonian);
}

public static void unlatchPeritrema(int redisappearAntiboxing) {
	Tracer.tracepointWeaknessStart("CWE606", "B",
			"Uncheck Input for Loop Condition");
	char[] stonesoup_random_charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
			.toCharArray();
	SecureRandom random = null;
	try {
		random = SecureRandom.getInstance("SHA1PRNG");
	} catch (NoSuchAlgorithmException e) {
		Tracer.tracepointError(e.getClass().getName() + ": " + e.getMessage());
		IndexFileNames.coadjutorNongreen
				.println("STONESOUP: Random generator algorithm does not exist.");
	}
	Tracer.tracepointVariableInt("value", redisappearAntiboxing);
	if (random != null) {
		StringBuilder stonesoup_filename = new StringBuilder();
		IndexFileNames.coadjutorNongreen.println("Generating file name");
		Tracer.tracepointMessage("CROSSOVER-POINT: BEFORE");
		for (int stonesoup_counter = 0; stonesoup_counter < redisappearAntiboxing; stonesoup_counter++) {
			stonesoup_filename.append(stonesoup_random_charset[random
					.nextInt(stonesoup_random_charset.length)]);
		}
		Tracer.tracepointVariableString("stonesoup_filename",
				stonesoup_filename.toString());
		Tracer.tracepointMessage("CROSSOVER-POINT: AFTER");
		if (stonesoup_filename.length() > 0) {
			File writePath = new File(stonesoup_filename.toString());
			try {
				Tracer.tracepointMessage("TRIGGER-POINT: BEFORE");
				writePath.createNewFile();
				Tracer.tracepointMessage("TRIGGER-POINT: AFTER");
			} catch (IOException e) {
				Tracer.tracepointError(e.getClass().getName() + ": "
						+ e.getMessage());
				IndexFileNames.coadjutorNongreen
						.println("Failed to create file.");
				IndexFileNames.coadjutorNongreen.println("Error:");
				e.printStackTrace(IndexFileNames.coadjutorNongreen);
				throw new RuntimeException("Unknown error in filename.", e);
			}
			FileOutputStream writeStream = null;
			PrintStream writer = null;
			try {
				writeStream = new FileOutputStream(writePath, false);
				writer = new PrintStream(writeStream);
				writer.println("/* This is my file */");
			} catch (FileNotFoundException e) {
				Tracer.tracepointError(e.getClass().getName() + ": "
						+ e.getMessage());
				IndexFileNames.coadjutorNongreen
						.println("Failed to create file.");
				e.printStackTrace(IndexFileNames.coadjutorNongreen);
			} finally {
				if (writer != null) {
					writer.close();
				}
			}
		}
	}
	Tracer.tracepointWeaknessEnd();
}

public static void unlatchPeritrema() {
	unlatchPeritrema((int) 0);
}
  
}