/*
 * 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.lucene.analysis.path;

import static org.apache.lucene.analysis.path.PathHierarchyTokenizer.DEFAULT_DELIMITER;
import static org.apache.lucene.analysis.path.PathHierarchyTokenizer.DEFAULT_SKIP;

import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import java.util.Random;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.Tokenizer;
import org.apache.lucene.analysis.charfilter.MappingCharFilter;
import org.apache.lucene.analysis.charfilter.NormalizeCharMap;
import org.apache.lucene.tests.analysis.BaseTokenStreamTestCase;

public class TestPathHierarchyTokenizer extends BaseTokenStreamTestCase {

  public void testBasic() throws Exception {
    String path = "/a/b/c";
    PathHierarchyTokenizer t =
        new PathHierarchyTokenizer(
            newAttributeFactory(), DEFAULT_DELIMITER, DEFAULT_DELIMITER, DEFAULT_SKIP);
    t.setReader(new StringReader(path));
    assertTokenStreamContents(
        t,
        new String[] {"/a", "/a/b", "/a/b/c"},
        new int[] {0, 0, 0},
        new int[] {2, 4, 6},
        new int[] {1, 1, 1},
        path.length());
  }

  public void testEndOfDelimiter() throws Exception {
    String path = "/a/b/c/";
    PathHierarchyTokenizer t =
        new PathHierarchyTokenizer(
            newAttributeFactory(), DEFAULT_DELIMITER, DEFAULT_DELIMITER, DEFAULT_SKIP);
    t.setReader(new StringReader(path));
    assertTokenStreamContents(
        t,
        new String[] {"/a", "/a/b", "/a/b/c", "/a/b/c/"},
        new int[] {0, 0, 0, 0},
        new int[] {2, 4, 6, 7},
        new int[] {1, 1, 1, 1},
        path.length());
  }

  public void testStartOfChar() throws Exception {
    String path = "a/b/c";
    PathHierarchyTokenizer t =
        new PathHierarchyTokenizer(
            newAttributeFactory(), DEFAULT_DELIMITER, DEFAULT_DELIMITER, DEFAULT_SKIP);
    t.setReader(new StringReader(path));
    assertTokenStreamContents(
        t,
        new String[] {"a", "a/b", "a/b/c"},
        new int[] {0, 0, 0},
        new int[] {1, 3, 5},
        new int[] {1, 1, 1},
        path.length());
  }

  public void testStartOfCharEndOfDelimiter() throws Exception {
    String path = "a/b/c/";
    PathHierarchyTokenizer t =
        new PathHierarchyTokenizer(
            newAttributeFactory(), DEFAULT_DELIMITER, DEFAULT_DELIMITER, DEFAULT_SKIP);
    t.setReader(new StringReader(path));
    assertTokenStreamContents(
        t,
        new String[] {"a", "a/b", "a/b/c", "a/b/c/"},
        new int[] {0, 0, 0, 0},
        new int[] {1, 3, 5, 6},
        new int[] {1, 1, 1, 1},
        path.length());
  }

  public void testOnlyDelimiter() throws Exception {
    String path = "/";
    PathHierarchyTokenizer t =
        new PathHierarchyTokenizer(
            newAttributeFactory(), DEFAULT_DELIMITER, DEFAULT_DELIMITER, DEFAULT_SKIP);
    t.setReader(new StringReader(path));
    assertTokenStreamContents(
        t, new String[] {"/"}, new int[] {0}, new int[] {1}, new int[] {1}, path.length());
  }

  public void testOnlyDelimiters() throws Exception {
    String path = "//";
    PathHierarchyTokenizer t =
        new PathHierarchyTokenizer(
            newAttributeFactory(), DEFAULT_DELIMITER, DEFAULT_DELIMITER, DEFAULT_SKIP);
    t.setReader(new StringReader(path));
    assertTokenStreamContents(
        t,
        new String[] {"/", "//"},
        new int[] {0, 0},
        new int[] {1, 2},
        new int[] {1, 1},
        path.length());
  }

  public void testReplace() throws Exception {
    String path = "/a/b/c";
    PathHierarchyTokenizer t =
        new PathHierarchyTokenizer(newAttributeFactory(), '/', '\\', DEFAULT_SKIP);
    t.setReader(new StringReader(path));
    assertTokenStreamContents(
        t,
        new String[] {"\\a", "\\a\\b", "\\a\\b\\c"},
        new int[] {0, 0, 0},
        new int[] {2, 4, 6},
        new int[] {1, 1, 1},
        path.length());
  }

  public void testWindowsPath() throws Exception {
    String path = "c:\\a\\b\\c";
    PathHierarchyTokenizer t =
        new PathHierarchyTokenizer(newAttributeFactory(), '\\', '\\', DEFAULT_SKIP);
    t.setReader(new StringReader(path));
    assertTokenStreamContents(
        t,
        new String[] {"c:", "c:\\a", "c:\\a\\b", "c:\\a\\b\\c"},
        new int[] {0, 0, 0, 0},
        new int[] {2, 4, 6, 8},
        new int[] {1, 1, 1, 1},
        path.length());
  }

  public void testNormalizeWinDelimToLinuxDelim() throws Exception {
    NormalizeCharMap.Builder builder = new NormalizeCharMap.Builder();
    builder.add("\\", "/");
    NormalizeCharMap normMap = builder.build();
    String path = "c:\\a\\b\\c";
    Reader cs = new MappingCharFilter(normMap, new StringReader(path));
    PathHierarchyTokenizer t =
        new PathHierarchyTokenizer(
            newAttributeFactory(), DEFAULT_DELIMITER, DEFAULT_DELIMITER, DEFAULT_SKIP);
    t.setReader(cs);
    assertTokenStreamContents(
        t,
        new String[] {"c:", "c:/a", "c:/a/b", "c:/a/b/c"},
        new int[] {0, 0, 0, 0},
        new int[] {2, 4, 6, 8},
        new int[] {1, 1, 1, 1},
        path.length());
  }

  public void testBasicSkip() throws Exception {
    String path = "/a/b/c";
    PathHierarchyTokenizer t =
        new PathHierarchyTokenizer(newAttributeFactory(), DEFAULT_DELIMITER, DEFAULT_DELIMITER, 1);
    t.setReader(new StringReader(path));
    assertTokenStreamContents(
        t,
        new String[] {"/b", "/b/c"},
        new int[] {2, 2},
        new int[] {4, 6},
        new int[] {1, 1},
        path.length());
  }

  public void testEndOfDelimiterSkip() throws Exception {
    String path = "/a/b/c/";
    PathHierarchyTokenizer t =
        new PathHierarchyTokenizer(newAttributeFactory(), DEFAULT_DELIMITER, DEFAULT_DELIMITER, 1);
    t.setReader(new StringReader(path));
    assertTokenStreamContents(
        t,
        new String[] {"/b", "/b/c", "/b/c/"},
        new int[] {2, 2, 2},
        new int[] {4, 6, 7},
        new int[] {1, 1, 1},
        path.length());
  }

  public void testStartOfCharSkip() throws Exception {
    String path = "a/b/c";
    PathHierarchyTokenizer t =
        new PathHierarchyTokenizer(newAttributeFactory(), DEFAULT_DELIMITER, DEFAULT_DELIMITER, 1);
    t.setReader(new StringReader(path));
    assertTokenStreamContents(
        t,
        new String[] {"/b", "/b/c"},
        new int[] {1, 1},
        new int[] {3, 5},
        new int[] {1, 1},
        path.length());
  }

  public void testStartOfCharEndOfDelimiterSkip() throws Exception {
    String path = "a/b/c/";
    PathHierarchyTokenizer t =
        new PathHierarchyTokenizer(newAttributeFactory(), DEFAULT_DELIMITER, DEFAULT_DELIMITER, 1);
    t.setReader(new StringReader(path));
    assertTokenStreamContents(
        t,
        new String[] {"/b", "/b/c", "/b/c/"},
        new int[] {1, 1, 1},
        new int[] {3, 5, 6},
        new int[] {1, 1, 1},
        path.length());
  }

  public void testOnlyDelimiterSkip() throws Exception {
    String path = "/";
    PathHierarchyTokenizer t =
        new PathHierarchyTokenizer(newAttributeFactory(), DEFAULT_DELIMITER, DEFAULT_DELIMITER, 1);
    t.setReader(new StringReader(path));
    assertTokenStreamContents(
        t, new String[] {}, new int[] {}, new int[] {}, new int[] {}, path.length());
  }

  public void testOnlyDelimitersSkip() throws Exception {
    String path = "//";
    PathHierarchyTokenizer t =
        new PathHierarchyTokenizer(newAttributeFactory(), DEFAULT_DELIMITER, DEFAULT_DELIMITER, 1);
    t.setReader(new StringReader(path));
    assertTokenStreamContents(
        t, new String[] {"/"}, new int[] {1}, new int[] {2}, new int[] {1}, path.length());
  }

  /** blast some random strings through the analyzer */
  public void testRandomStrings() throws Exception {
    Analyzer a =
        new Analyzer() {
          @Override
          protected TokenStreamComponents createComponents(String fieldName) {
            Tokenizer tokenizer =
                new PathHierarchyTokenizer(
                    newAttributeFactory(), DEFAULT_DELIMITER, DEFAULT_DELIMITER, DEFAULT_SKIP);
            return new TokenStreamComponents(tokenizer, tokenizer);
          }
        };
    // TODO: properly support positionLengthAttribute
    checkRandomData(random(), a, 200 * RANDOM_MULTIPLIER, 20, false, false);
    a.close();
  }

  /** blast some random large strings through the analyzer */
  public void testRandomHugeStrings() throws Exception {
    Random random = random();
    Analyzer a =
        new Analyzer() {
          @Override
          protected TokenStreamComponents createComponents(String fieldName) {
            Tokenizer tokenizer =
                new PathHierarchyTokenizer(
                    newAttributeFactory(), DEFAULT_DELIMITER, DEFAULT_DELIMITER, DEFAULT_SKIP);
            return new TokenStreamComponents(tokenizer, tokenizer);
          }
        };
    // TODO: properly support positionLengthAttribute
    checkRandomData(random, a, 100 * RANDOM_MULTIPLIER, 1027, false, false);
    a.close();
  }

  private final Analyzer analyzer =
      new Analyzer() {
        @Override
        protected TokenStreamComponents createComponents(String fieldName) {
          Tokenizer tokenizer = new PathHierarchyTokenizer();
          return new TokenStreamComponents(tokenizer);
        }
      };

  public void testTokenizerViaAnalyzerOutput() throws IOException {
    assertAnalyzesTo(analyzer, "a/b/c", new String[] {"a", "a/b", "a/b/c"});
    assertAnalyzesTo(analyzer, "a/b/c/", new String[] {"a", "a/b", "a/b/c", "a/b/c/"});
    assertAnalyzesTo(analyzer, "/a/b/c", new String[] {"/a", "/a/b", "/a/b/c"});
    assertAnalyzesTo(analyzer, "/a/b/c/", new String[] {"/a", "/a/b", "/a/b/c", "/a/b/c/"});
  }
}
