/*
 * 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.
 */
/*
 * Created on Oct 13, 2005
 *
 *
 */
package org.apache.geode.cache.query.internal;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import java.util.ArrayList;
import java.util.List;
import java.util.SortedMap;
import java.util.TreeMap;

import org.junit.After;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import org.junit.experimental.categories.Category;

import org.apache.geode.cache.query.CacheUtils;
import org.apache.geode.cache.query.internal.parse.OQLLexerTokenTypes;
import org.apache.geode.test.junit.categories.OQLQueryTest;

@Category({OQLQueryTest.class})
public class QCompilerJUnitTest {

  QueryExecutionContext context = new QueryExecutionContext(null, null);

  @Test
  public void testStringConditioningForLike_1() {
    String s1 = "abc%";
    StringBuffer buffer = new StringBuffer(s1);
    CompiledLike cl = new CompiledLike(null, null);
    int wildCardPosition = cl.checkIfSargableAndRemoveEscapeChars(context, buffer);
    assertEquals(3, wildCardPosition);
    assertEquals(s1, buffer.toString());

    s1 = "abc\\%abc";
    buffer = new StringBuffer(s1);
    wildCardPosition = cl.checkIfSargableAndRemoveEscapeChars(context, buffer);
    assertEquals(-1, wildCardPosition);
    assertEquals(buffer.toString(), "abc%abc");

    s1 = "abc\\\\%abc";
    buffer = new StringBuffer(s1);
    wildCardPosition = cl.checkIfSargableAndRemoveEscapeChars(context, buffer);
    assertEquals(4, wildCardPosition);
    assertEquals(buffer.toString(), "abc\\%abc");

    s1 = "abc\\\\\\%abc";
    buffer = new StringBuffer(s1);
    wildCardPosition = cl.checkIfSargableAndRemoveEscapeChars(context, buffer);
    assertEquals(-1, wildCardPosition);
    assertEquals(buffer.toString(), "abc\\%abc");

    s1 = "%";
    buffer = new StringBuffer(s1);
    wildCardPosition = cl.checkIfSargableAndRemoveEscapeChars(context, buffer);
    assertEquals(0, wildCardPosition);
    assertEquals(buffer.toString(), s1);

    s1 = "%abc";
    buffer = new StringBuffer(s1);
    wildCardPosition = cl.checkIfSargableAndRemoveEscapeChars(context, buffer);
    assertEquals(0, wildCardPosition);
    assertEquals(buffer.toString(), "%abc");

    s1 = "%%abc";
    buffer = new StringBuffer(s1);
    wildCardPosition = cl.checkIfSargableAndRemoveEscapeChars(context, buffer);
    assertEquals(0, wildCardPosition);
    assertEquals(buffer.toString(), "%%abc");

    s1 = "%\\%abc";
    buffer = new StringBuffer(s1);
    wildCardPosition = cl.checkIfSargableAndRemoveEscapeChars(context, buffer);
    assertEquals(0, wildCardPosition);
    assertEquals(buffer.toString(), "%\\%abc");

    s1 = "_abc";
    buffer = new StringBuffer(s1);

    wildCardPosition = cl.checkIfSargableAndRemoveEscapeChars(context, buffer);
    assertEquals(0, wildCardPosition);
    assertEquals(buffer.toString(), "_abc");

    s1 = "\\_abc";
    buffer = new StringBuffer(s1);

    wildCardPosition = cl.checkIfSargableAndRemoveEscapeChars(context, buffer);
    assertEquals(-1, wildCardPosition);
    assertEquals(buffer.toString(), "_abc");

    s1 = "ab\\%c%d";
    buffer = new StringBuffer(s1);

    wildCardPosition = cl.checkIfSargableAndRemoveEscapeChars(context, buffer);
    assertEquals(4, wildCardPosition);
    assertEquals(buffer.toString(), "ab%c%d");

    s1 = "ab\\__d";
    buffer = new StringBuffer(s1);

    wildCardPosition = cl.checkIfSargableAndRemoveEscapeChars(context, buffer);
    assertEquals(3, wildCardPosition);
    assertEquals(buffer.toString(), "ab__d");
  }

  @Test
  public void testSargableRange() throws Exception {
    String pattern = "abc";
    CompiledLiteral literal = new CompiledLiteral(pattern);
    CompiledID cid = new CompiledID("val");
    CompiledLike cl = new CompiledLike(cid, literal);
    CompiledComparison[] cc = cl.getRangeIfSargable(context, cid, pattern);
    assertEquals(1, cc.length);

    ArrayList cv = (ArrayList) cc[0].getChildren();
    assertTrue(cv.get(0) instanceof CompiledID);
    assertEquals("val", ((CompiledID) cv.get(0)).getId());
    assertTrue(cv.get(1) instanceof CompiledLiteral);
    assertEquals(pattern, ((CompiledLiteral) cv.get(1))._obj);
    assertEquals(OQLLexerTokenTypes.TOK_EQ, cc[0].getOperator());

    pattern = "ab%";
    literal = new CompiledLiteral(pattern);
    cl = new CompiledLike(cid, literal);
    cc = cl.getRangeIfSargable(context, cid, pattern);
    assertEquals(2, cc.length);

    cv = (ArrayList) cc[0].getChildren();
    assertTrue(cv.get(0) instanceof CompiledID);
    assertEquals("val", ((CompiledID) cv.get(0)).getId());
    assertTrue(cv.get(1) instanceof CompiledLiteral);
    assertEquals("ab", ((CompiledLiteral) cv.get(1))._obj);
    assertEquals(OQLLexerTokenTypes.TOK_GE, cc[0].getOperator());

    cv = (ArrayList) cc[1].getChildren();
    assertTrue(cv.get(0) instanceof CompiledID);
    assertEquals("val", ((CompiledID) cv.get(0)).getId());
    assertTrue(cv.get(1) instanceof CompiledLiteral);
    assertEquals("ac", ((CompiledLiteral) cv.get(1))._obj);
    assertEquals(OQLLexerTokenTypes.TOK_LT, cc[1].getOperator());

    pattern = "a%c";
    literal = new CompiledLiteral(pattern);
    cl = new CompiledLike(cid, literal);
    cc = cl.getRangeIfSargable(context, cid, pattern);
    assertEquals(3, cc.length);

    cv = (ArrayList) cc[0].getChildren();
    assertTrue(cv.get(0) instanceof CompiledID);
    assertEquals("val", ((CompiledID) cv.get(0)).getId());
    assertTrue(cv.get(1) instanceof CompiledLiteral);
    assertEquals("a", ((CompiledLiteral) cv.get(1))._obj);
    assertEquals(OQLLexerTokenTypes.TOK_GE, cc[0].getOperator());

    cv = (ArrayList) cc[1].getChildren();
    assertTrue(cv.get(0) instanceof CompiledID);
    assertEquals("val", ((CompiledID) cv.get(0)).getId());
    assertTrue(cv.get(1) instanceof CompiledLiteral);
    assertEquals("b", ((CompiledLiteral) cv.get(1))._obj);
    assertEquals(OQLLexerTokenTypes.TOK_LT, cc[1].getOperator());

    assertEquals(cc[2], cl);

    pattern = "%bc";
    literal = new CompiledLiteral(pattern);
    cl = new CompiledLike(cid, literal);
    cc = cl.getRangeIfSargable(context, cid, pattern);
    assertEquals(2, cc.length);

    cv = (ArrayList) cc[0].getChildren();
    assertTrue(cv.get(0) instanceof CompiledID);
    assertEquals("val", ((CompiledID) cv.get(0)).getId());
    assertTrue(cv.get(1) instanceof CompiledLiteral);
    assertEquals("", ((CompiledLiteral) cv.get(1))._obj);
    assertEquals(OQLLexerTokenTypes.TOK_GE, cc[0].getOperator());

    assertEquals(cc[1], cl);

    pattern = "ab_";
    literal = new CompiledLiteral(pattern);
    cl = new CompiledLike(cid, literal);
    cc = cl.getRangeIfSargable(context, cid, pattern);
    assertEquals(3, cc.length);

    cv = (ArrayList) cc[0].getChildren();
    assertTrue(cv.get(0) instanceof CompiledID);
    assertEquals("val", ((CompiledID) cv.get(0)).getId());
    assertTrue(cv.get(1) instanceof CompiledLiteral);
    assertEquals("ab", ((CompiledLiteral) cv.get(1))._obj);
    assertEquals(OQLLexerTokenTypes.TOK_GE, cc[0].getOperator());

    cv = (ArrayList) cc[1].getChildren();
    assertTrue(cv.get(0) instanceof CompiledID);
    assertEquals("val", ((CompiledID) cv.get(0)).getId());
    assertTrue(cv.get(1) instanceof CompiledLiteral);
    assertEquals("ac", ((CompiledLiteral) cv.get(1))._obj);
    assertEquals(OQLLexerTokenTypes.TOK_LT, cc[1].getOperator());

    assertEquals(cc[2], cl);

    pattern = "_bc";
    literal = new CompiledLiteral(pattern);
    cl = new CompiledLike(cid, literal);
    cc = cl.getRangeIfSargable(context, cid, pattern);
    assertEquals(2, cc.length);

    cv = (ArrayList) cc[0].getChildren();
    assertTrue(cv.get(0) instanceof CompiledID);
    assertEquals("val", ((CompiledID) cv.get(0)).getId());
    assertTrue(cv.get(1) instanceof CompiledLiteral);
    assertEquals("", ((CompiledLiteral) cv.get(1))._obj);
    assertEquals(OQLLexerTokenTypes.TOK_GE, cc[0].getOperator());

    assertEquals(cc[1], cl);

    pattern = "a_c";
    literal = new CompiledLiteral(pattern);
    cl = new CompiledLike(cid, literal);
    cc = cl.getRangeIfSargable(context, cid, pattern);
    assertEquals(3, cc.length);

    cv = (ArrayList) cc[0].getChildren();
    assertTrue(cv.get(0) instanceof CompiledID);
    assertEquals("val", ((CompiledID) cv.get(0)).getId());
    assertTrue(cv.get(1) instanceof CompiledLiteral);
    assertEquals("a", ((CompiledLiteral) cv.get(1))._obj);
    assertEquals(OQLLexerTokenTypes.TOK_GE, cc[0].getOperator());

    cv = (ArrayList) cc[1].getChildren();
    assertTrue(cv.get(0) instanceof CompiledID);
    assertEquals("val", ((CompiledID) cv.get(0)).getId());
    assertTrue(cv.get(1) instanceof CompiledLiteral);
    assertEquals("b", ((CompiledLiteral) cv.get(1))._obj);
    assertEquals(OQLLexerTokenTypes.TOK_LT, cc[1].getOperator());

    assertEquals(cc[2], cl);

    pattern = "_b%";
    literal = new CompiledLiteral(pattern);
    cl = new CompiledLike(cid, literal);
    cc = cl.getRangeIfSargable(context, cid, pattern);
    assertEquals(2, cc.length);

    cv = (ArrayList) cc[0].getChildren();
    assertTrue(cv.get(0) instanceof CompiledID);
    assertEquals("val", ((CompiledID) cv.get(0)).getId());
    assertTrue(cv.get(1) instanceof CompiledLiteral);
    assertEquals("", ((CompiledLiteral) cv.get(1))._obj);
    assertEquals(OQLLexerTokenTypes.TOK_GE, cc[0].getOperator());

    assertEquals(cc[1], cl);

    pattern = "a\\%bc";
    literal = new CompiledLiteral(pattern);
    cl = new CompiledLike(cid, literal);
    cc = cl.getRangeIfSargable(context, cid, pattern);
    assertEquals(1, cc.length);

    cv = (ArrayList) cc[0].getChildren();
    assertTrue(cv.get(0) instanceof CompiledID);
    assertEquals("val", ((CompiledID) cv.get(0)).getId());
    assertTrue(cv.get(1) instanceof CompiledLiteral);
    assertEquals("a%bc", ((CompiledLiteral) cv.get(1))._obj);
    assertEquals(OQLLexerTokenTypes.TOK_EQ, cc[0].getOperator());

    pattern = "ab%";
    literal = new CompiledLiteral(pattern);
    cl = new CompiledLike(cid, literal);
    cl.negate();
    cc = cl.getRangeIfSargable(context, cid, pattern);
    assertEquals(2, cc.length);

    cv = (ArrayList) cc[0].getChildren();
    assertTrue(cv.get(0) instanceof CompiledID);
    assertEquals("val", ((CompiledID) cv.get(0)).getId());
    assertTrue(cv.get(1) instanceof CompiledLiteral);
    assertEquals("ab", ((CompiledLiteral) cv.get(1))._obj);
    assertEquals(OQLLexerTokenTypes.TOK_GE, cc[0].getOperator());

    cv = (ArrayList) cc[1].getChildren();
    assertTrue(cv.get(0) instanceof CompiledID);
    assertEquals("val", ((CompiledID) cv.get(0)).getId());
    assertTrue(cv.get(1) instanceof CompiledLiteral);
    assertEquals("ac", ((CompiledLiteral) cv.get(1))._obj);
    assertEquals(OQLLexerTokenTypes.TOK_LT, cc[1].getOperator());

    pattern = "a%c";
    literal = new CompiledLiteral(pattern);
    cl = new CompiledLike(cid, literal);
    cl.negate();
    cc = cl.getRangeIfSargable(context, cid, pattern);
    assertEquals(2, cc.length);

    cv = (ArrayList) cc[0].getChildren();
    assertTrue(cv.get(0) instanceof CompiledID);
    assertEquals("val", ((CompiledID) cv.get(0)).getId());
    assertTrue(cv.get(1) instanceof CompiledLiteral);
    assertEquals("", ((CompiledLiteral) cv.get(1))._obj);
    assertEquals(OQLLexerTokenTypes.TOK_GE, cc[0].getOperator());

    assertEquals(cc[1], cl);

    pattern = "a_";
    literal = new CompiledLiteral(pattern);
    cl = new CompiledLike(cid, literal);
    cl.negate();
    cc = cl.getRangeIfSargable(context, cid, pattern);
    assertEquals(2, cc.length);

    cv = (ArrayList) cc[0].getChildren();
    assertTrue(cv.get(0) instanceof CompiledID);
    assertEquals("val", ((CompiledID) cv.get(0)).getId());
    assertTrue(cv.get(1) instanceof CompiledLiteral);
    assertEquals("", ((CompiledLiteral) cv.get(1))._obj);
    assertEquals(OQLLexerTokenTypes.TOK_GE, cc[0].getOperator());

    assertEquals(cc[1], cl);
  }

  /**
   * This test is no more valid. From 6.6 Like is enhanced to support special chars (% and _) at any
   * place in the string pattern. With this the Like predicate is not transformed to
   * compiled-junction with > and < operator.
   */
  @Ignore
  @Test
  public void testStringConditioningForLike_2() {
    CompiledValue var = new CompiledPath(new CompiledID("p"), "ID");
    String s1 = "abc%";
    CompiledLiteral literal = new CompiledLiteral(s1);
    QCompiler compiler = new QCompiler();
    CompiledValue result = compiler.createCompiledValueForLikePredicate(var, literal);
    validationHelperForCompiledJunction((CompiledJunction) result, "abc", "abd");

    s1 = "abc\\\\%";
    literal = new CompiledLiteral(s1);
    compiler = new QCompiler();
    result = compiler.createCompiledValueForLikePredicate(var, literal);
    validationHelperForCompiledJunction((CompiledJunction) result, "abc\\\\", "abc\\]");

    s1 = "abc" + new String(new char[] {(char) 255, '%'});
    literal = new CompiledLiteral(s1);
    compiler = new QCompiler();
    result = compiler.createCompiledValueForLikePredicate(var, literal);
    String lowerBoundKey = "abc" + new String(new char[] {(char) 255});
    validationHelperForCompiledJunction((CompiledJunction) result, lowerBoundKey, "abd");

    s1 = "abc"
        + new String(new char[] {(char) 255, (char) 255, (char) 255, (char) 255, (char) 255, '%'});
    literal = new CompiledLiteral(s1);
    compiler = new QCompiler();
    result = compiler.createCompiledValueForLikePredicate(var, literal);
    lowerBoundKey =
        "abc" + new String(new char[] {(char) 255, (char) 255, (char) 255, (char) 255, (char) 255});
    validationHelperForCompiledJunction((CompiledJunction) result, lowerBoundKey, "abd");

    s1 = "%";
    literal = new CompiledLiteral(s1);
    compiler = new QCompiler();
    result = compiler.createCompiledValueForLikePredicate(var, literal);
    assertTrue(result instanceof CompiledComparison);
    CompiledComparison cc = (CompiledComparison) result;
    assertTrue(
        cc.reflectOnOperator((CompiledValue) cc.getChildren().get(1)) == OQLLexerTokenTypes.TOK_GE);
    assertTrue(((CompiledLiteral) cc.getChildren().get(1))._obj.equals(""));
  }

  private void validationHelperForCompiledJunction(CompiledJunction result, String lowerBoundKey,
      String upperBoundKey) {
    CompiledJunction cj = result;
    assertTrue(cj.getOperator() == OQLLexerTokenTypes.LITERAL_and);
    List list = cj.getChildren();
    CompiledComparison lowerBound = (CompiledComparison) list.get(0);
    CompiledComparison upperBound = (CompiledComparison) list.get(1);
    assertTrue(lowerBound.reflectOnOperator(
        (CompiledValue) lowerBound.getChildren().get(1)) == OQLLexerTokenTypes.TOK_GE);
    assertTrue(upperBound.reflectOnOperator(
        (CompiledValue) upperBound.getChildren().get(1)) == OQLLexerTokenTypes.TOK_LT);
    assertEquals(lowerBoundKey, ((CompiledLiteral) lowerBound.getChildren().get(1))._obj);
    assertEquals(upperBoundKey, ((CompiledLiteral) upperBound.getChildren().get(1))._obj);

  }

  @Before
  public void setUp() throws Exception {
    CacheUtils.startCache();
  }

  @After
  public void tearDown() throws Exception {
    CacheUtils.closeCache();
  }

  @Test
  public void testLowestString() {
    SortedMap map = new TreeMap();
    map.put("ab", "value");
    map.put("z", "value");
    map.put("v", "value");
    SortedMap returnMap = map.tailMap(CompiledLike.LOWEST_STRING);
    assertEquals(3, returnMap.size());
  }

  @Test
  public void testBoundaryChar() {
    String s1 = "!";
    String s2 = "9";
    String s3 = "A";
    String s4 = "[";
    String s5 = "a";
    String s6 = "{";
    String s7 = new String(new char[] {(char) 255});
    assertTrue(s2.compareTo(s1) > 0);
    assertTrue(s3.compareTo(s2) > 0);
    assertTrue(s4.compareTo(s3) > 0);
    assertTrue(s5.compareTo(s4) > 0);
    assertTrue(s6.compareTo(s5) > 0);
    assertTrue(s7.compareTo(s6) > 0);

  }

}