/*
    * 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
    *
    *      https://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.commons.validator.routines;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertNotSame;
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  import static org.junit.jupiter.api.Assertions.fail;
  
  import java.util.regex.Pattern;
  import java.util.regex.PatternSyntaxException;
  
  import org.junit.jupiter.api.Test;
  
  /**
   * Test Case for RegexValidatorTest.
   */
  class RegexValidatorTest {
      private static final String REGEX = "^([abc]*)(?:\\-)([DEF]*)(?:\\-)([123]*)$";
      private static final String COMPONENT_1 = "([abc]{3})";
      private static final String COMPONENT_2 = "([DEF]{3})";
      private static final String COMPONENT_3 = "([123]{3})";
      private static final String SEPARATOR_1 = "(?:\\-)";
      private static final String SEPARATOR_2 = "(?:\\s)";
      private static final String REGEX_1 = "^" + COMPONENT_1 + SEPARATOR_1 + COMPONENT_2 + SEPARATOR_1 + COMPONENT_3 + "$";
      private static final String REGEX_2 = "^" + COMPONENT_1 + SEPARATOR_2 + COMPONENT_2 + SEPARATOR_2 + COMPONENT_3 + "$";
      private static final String REGEX_3 = "^" + COMPONENT_1 + COMPONENT_2 + COMPONENT_3 + "$";
      private static final String[] MULTIPLE_REGEX = { REGEX_1, REGEX_2, REGEX_3 };
  
      /**
       * Compare two arrays
       *
       * @param label  Label for the test
       * @param expect Expected array
       * @param result Actual array
       */
      private void checkArray(final String label, final String[] expect, final String[] result) {
          // Handle nulls
          if (expect == null || result == null) {
              if (expect == null && result == null) {
                  return; // valid, both null
              }
              fail(label + " Null expect=" + expect + " result=" + result);
              return; // not strictly necessary, but prevents possible NPE below
          }
          // Check Length
          if (expect.length != result.length) {
              fail(label + " Length expect=" + expect.length + " result=" + result.length);
          }
          // Check Values
          for (int i = 0; i < expect.length; i++) {
              assertEquals(expect[i], result[i], label + " value[" + i + "]");
          }
      }
  
      /**
       * Test exceptions
       */
      @Test
      void testExceptions() {
          assertThrows(PatternSyntaxException.class, () -> new RegexValidator("^([abCD12]*$"));
      }
  
      @Test
      void testGetPatterns() {
          final RegexValidator regexValidator = new RegexValidator(MULTIPLE_REGEX);
          assertNotSame(regexValidator.getPatterns(), regexValidator.getPatterns());
          final Pattern[] patterns = regexValidator.getPatterns();
          assertEquals(REGEX_1, patterns[0].pattern());
          assertEquals(REGEX_2, patterns[1].pattern());
          assertEquals(REGEX_3, patterns[2].pattern());
      }
  
      /**
       * Test exceptions
       */
      @Test
      void testMissingRegex() {
          // Single Regular Expression - null
          Exception e = assertThrows(IllegalArgumentException.class, () -> new RegexValidator((String) null), "Single Null");
          assertEquals("Regular expression[0] is missing", e.getMessage(), "Single Null");
          // Single Regular Expression - Zero Length
         e = assertThrows(IllegalArgumentException.class, () -> new RegexValidator(""), "Single Zero Length");
         assertEquals("Regular expression[0] is missing", e.getMessage(), "Single Zero Length");
         // Multiple Regular Expression - Null array
         e = assertThrows(IllegalArgumentException.class, () -> new RegexValidator((String[]) null), "Null Array");
         assertEquals("Regular expressions are missing", e.getMessage(), "Null Array");
         // Multiple Regular Expression - Zero Length array
         e = assertThrows(IllegalArgumentException.class, RegexValidator::new, "Zero Length Array");
         assertEquals("Regular expressions are missing", e.getMessage(), "Zero Length Array");
         // Multiple Regular Expression - Array has Null
         e = assertThrows(IllegalArgumentException.class, () -> new RegexValidator(new String[] { "ABC", null }), "Array has Null");
         assertEquals("Regular expression[1] is missing", e.getMessage(), "Array has Null");
         // Multiple Regular Expression - Array has Zero Length
         e = assertThrows(IllegalArgumentException.class, () -> new RegexValidator(new String[] { "", "ABC" }), "Array has Zero Length");
         assertEquals("Regular expression[0] is missing", e.getMessage(), "Array has Zero Length");
     }
 
     /**
      * Test with multiple regular expressions (case in-sensitive).
      */
     @Test
     void testMultipleInsensitive() {
         // Set up In-sensitive Validators
         final RegexValidator multiple = new RegexValidator(MULTIPLE_REGEX, false);
         final RegexValidator single1 = new RegexValidator(REGEX_1, false);
         final RegexValidator single2 = new RegexValidator(REGEX_2, false);
         final RegexValidator single3 = new RegexValidator(REGEX_3, false);
         // Set up test values
         String value = "AAC FDE 321";
         final String expect = "AACFDE321";
         final String[] array = { "AAC", "FDE", "321" };
         // isValid()
         assertTrue(multiple.isValid(value), "isValid() Multiple");
         assertFalse(single1.isValid(value), "isValid() 1st");
         assertTrue(single2.isValid(value), "isValid() 2nd");
         assertFalse(single3.isValid(value), "isValid() 3rd");
         // validate()
         assertEquals(expect, multiple.validate(value), "validate() Multiple");
         assertNull(single1.validate(value), "validate() 1st");
         assertEquals(expect, single2.validate(value), "validate() 2nd");
         assertNull(single3.validate(value), "validate() 3rd");
         // match()
         checkArray("match() Multiple", array, multiple.match(value));
         checkArray("match() 1st", null, single1.match(value));
         checkArray("match() 2nd", array, single2.match(value));
         checkArray("match() 3rd", null, single3.match(value));
         // All invalid
         value = "AAC*FDE*321";
         assertFalse(multiple.isValid(value), "isValid() Invalid");
         assertNull(multiple.validate(value), "validate() Invalid");
         assertNull(multiple.match(value), "match() Multiple");
     }
 
     /**
      * Test with multiple regular expressions (case sensitive).
      */
     @Test
     void testMultipleSensitive() {
         // Set up Sensitive Validators
         final RegexValidator multiple = new RegexValidator(MULTIPLE_REGEX);
         final RegexValidator single1 = new RegexValidator(REGEX_1);
         final RegexValidator single2 = new RegexValidator(REGEX_2);
         final RegexValidator single3 = new RegexValidator(REGEX_3);
         // Set up test values
         String value = "aac FDE 321";
         final String expect = "aacFDE321";
         final String[] array = { "aac", "FDE", "321" };
         // isValid()
         assertTrue(multiple.isValid(value), "Sensitive isValid() Multiple");
         assertFalse(single1.isValid(value), "Sensitive isValid() 1st");
         assertTrue(single2.isValid(value), "Sensitive isValid() 2nd");
         assertFalse(single3.isValid(value), "Sensitive isValid() 3rd");
         // validate()
         assertEquals(expect, multiple.validate(value), "Sensitive validate() Multiple");
         assertNull(single1.validate(value), "Sensitive validate() 1st");
         assertEquals(expect, single2.validate(value), "Sensitive validate() 2nd");
         assertNull(single3.validate(value), "Sensitive validate() 3rd");
         // match()
         checkArray("Sensitive match() Multiple", array, multiple.match(value));
         checkArray("Sensitive match() 1st", null, single1.match(value));
         checkArray("Sensitive match() 2nd", array, single2.match(value));
         checkArray("Sensitive match() 3rd", null, single3.match(value));
         // All invalid
         value = "AAC*FDE*321";
         assertFalse(multiple.isValid(value), "isValid() Invalid");
         assertNull(multiple.validate(value), "validate() Invalid");
         assertNull(multiple.match(value), "match() Multiple");
     }
 
     /**
      * Test Null value
      */
     @Test
     void testNullValue() {
         final RegexValidator validator = new RegexValidator(REGEX);
         assertFalse(validator.isValid(null), "Instance isValid()");
         assertNull(validator.validate(null), "Instance validate()");
         assertNull(validator.match(null), "Instance match()");
     }
 
     /**
      * Test instance methods with single regular expression.
      */
     @Test
     void testSingle() {
         final RegexValidator sensitive = new RegexValidator(REGEX);
         final RegexValidator insensitive = new RegexValidator(REGEX, false);
         // isValid()
         assertTrue(sensitive.isValid("ac-DE-1"), "Sensitive isValid() valid");
         assertFalse(sensitive.isValid("AB-de-1"), "Sensitive isValid() invalid");
         assertTrue(insensitive.isValid("AB-de-1"), "Insensitive isValid() valid");
         assertFalse(insensitive.isValid("ABd-de-1"), "Insensitive isValid() invalid");
         // validate()
         assertEquals("acDE1", sensitive.validate("ac-DE-1"), "Sensitive validate() valid");
         assertNull(sensitive.validate("AB-de-1"), "Sensitive validate() invalid");
         assertEquals("ABde1", insensitive.validate("AB-de-1"), "Insensitive validate() valid");
         assertNull(insensitive.validate("ABd-de-1"), "Insensitive validate() invalid");
         // match()
         checkArray("Sensitive match() valid", new String[] { "ac", "DE", "1" }, sensitive.match("ac-DE-1"));
         checkArray("Sensitive match() invalid", null, sensitive.match("AB-de-1"));
         checkArray("Insensitive match() valid", new String[] { "AB", "de", "1" }, insensitive.match("AB-de-1"));
         checkArray("Insensitive match() invalid", null, insensitive.match("ABd-de-1"));
         assertEquals("ABC", new RegexValidator("^([A-Z]*)$").validate("ABC"), "validate one");
         checkArray("match one", new String[] { "ABC" }, new RegexValidator("^([A-Z]*)$").match("ABC"));
     }
 
     /**
      * Test toString() method
      */
     @Test
     void testToString() {
         final RegexValidator single = new RegexValidator(REGEX);
         assertEquals("RegexValidator{" + REGEX + "}", single.toString(), "Single");
         final RegexValidator multiple = new RegexValidator(REGEX, REGEX);
         assertEquals("RegexValidator{" + REGEX + "," + REGEX + "}", multiple.toString(), "Multiple");
     }
 }