/*
    * 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.commons.jexl3.internal.introspection;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  
  import org.junit.jupiter.api.Test;
  
  /**
   * Checks the CacheMap.MethodKey implementation
   */
  public class MethodKeyTest {
      // A set of classes (most of them primitives)
      private static final Class<?>[] PRIMS = {
          Boolean.TYPE,
          Byte.TYPE,
          Character.TYPE,
          Double.TYPE,
          Float.TYPE,
          Integer.TYPE,
          Long.TYPE,
          Short.TYPE,
          String.class,
          java.util.Date.class
      };
      // A set of instances corresponding to the classes
      private static final Object[] ARGS = {
          Boolean.TRUE,
              (byte) 1,
              '2',
              4d,
              8f,
              16,
              32L,
              (short) 64,
          "foobar",
          new java.util.Date()
      };
      // A set of (pseudo) method names
      private static final String[] METHODS = {
          "plus",
          "minus",
          "execute",
          "activate",
          "perform",
          "apply",
          "invoke",
          "executeAction",
          "activateAction",
          "performAction",
          "applyAction",
          "invokeAction",
          "executeFunctor",
          "activateFunctor",
          "performFunctor",
          "applyFunctor",
          "invokeFunctor",
          "executeIt",
          "activateIt",
          "performIt",
          "applyIt",
          "invokeIt"
      };
      /** From key to string */
      private static final java.util.Map< MethodKey, String> BY_KEY;
      /** Form string to key */
      private static final java.util.Map<String, MethodKey> BY_STRING;
      /** The list of keys we generated & test against */
      private static final MethodKey[] KEY_LIST;
  
      /* Generate a list of method*(prims*), method(prims*, prims*), method*(prims*,prims*,prims*) */
      static {
          BY_KEY = new java.util.HashMap<>();
          BY_STRING = new java.util.HashMap<>();
          for (final String method : METHODS) {
              for (final Class<?> value : PRIMS) {
                  final Class<?>[] arg0 = {value};
                  setUpKey(method, arg0);
                  for (final Class<?> aClass : PRIMS) {
                      final Class<?>[] arg1 = {value, aClass};
                      setUpKey(method, arg1);
                      for (final Class<?> prim : PRIMS) {
                          final Class<?>[] arg2 = {value, aClass, prim};
                          setUpKey(method, arg2);
                     }
                 }
             }
         }
         KEY_LIST = BY_KEY.keySet().toArray(new MethodKey[0]);
     }
 
     private static final int LOOP = 3; //00;
 
     /** * Creates & inserts a key into the BY_KEY & byString map */
     private static void setUpKey(final String name, final Class<?>[] parms) {
         final MethodKey key = new MethodKey(name, parms);
         final String str = key.toString();
         BY_KEY.put(key, str);
         BY_STRING.put(str, key);
 
     }
 
     /** Checks that a method key exists */
     void checkKey(final String method, final Class<?>... params) {
         final MethodKey key = makeKey(method, params);
         final String out = BY_KEY.get(key);
         assertNotNull(out);
     }
 
     /** Checks that a string key does exist */
     void checkStringKey(final String method, final Class<?>... params) {
         final String key = makeStringKey(method, params);
         final MethodKey out = BY_STRING.get(key);
         assertNotNull(out);
     }
 
     /** Builds a method key */
     MethodKey makeKey(final String method, final Class<?>... params) {
         return new MethodKey(method, params);
     }
 
     /** Builds a string key */
     String makeStringKey(final String method, final Class<?>... params) {
         final StringBuilder builder = new StringBuilder(method);
         for (final Class<?> param : params) {
             builder.append(MethodKey.primitiveClass(param).getName());
         }
         return builder.toString();
     }
 
     @Test
     public void testDebugString() throws Exception {
         final MethodKey c = KEY_LIST[0];
         final String str = c.debugString();
         assertNotNull(str);
     }
 
     @Test
     public void testObjectKey() throws Exception {
         for (final MethodKey ctl : KEY_LIST) {
             final MethodKey key = makeKey(ctl.getMethod(), ctl.getParameters());
             final String out = BY_KEY.get(key);
             assertNotNull(out);
             assertEquals(ctl.toString(), out, () -> ctl.toString() + " != " + out);
         }
 
     }
     @Test
     public void testPerfKey() throws Exception {
         for (int l = 0; l < LOOP; ++l) {
             for (final MethodKey ctl : KEY_LIST) {
                 final MethodKey key = makeKey(ctl.getMethod(), ctl.getParameters());
                 final String out = BY_KEY.get(key);
                 assertNotNull(out);
             }
         }
     }
 
     @Test
     public void testPerfKey2() throws Exception {
         for (int l = 0; l < LOOP; ++l) {
             for (final String method : METHODS) {
                 for (final Object value : ARGS) {
                     checkKey(method, value.getClass());
                     for (final Object o : ARGS) {
                         checkKey(method, value.getClass(), o.getClass());
                         for (final Object arg : ARGS) {
                             checkKey(method, value.getClass(), o.getClass(), arg.getClass());
                         }
                     }
                 }
             }
         }
     }
 
     @Test
     public void testPerfString() throws Exception {
         for (int l = 0; l < LOOP; ++l) {
             for (final MethodKey ctl : KEY_LIST) {
                 final String key = makeStringKey(ctl.getMethod(), ctl.getParameters());
                 final MethodKey out = BY_STRING.get(key);
                 assertNotNull(out);
             }
         }
     }
 
     @Test
     public void testPerfStringKey2() throws Exception {
         for (int l = 0; l < LOOP; ++l) {
             for (final String method : METHODS) {
                 for (final Object value : ARGS) {
                     checkStringKey(method, value.getClass());
                     for (final Object o : ARGS) {
                         checkStringKey(method, value.getClass(), o.getClass());
                         for (final Object arg : ARGS) {
                             checkStringKey(method, value.getClass(), o.getClass(), arg.getClass());
                         }
                     }
                 }
             }
         }
     }
 
     @Test
     public void testStringKey() throws Exception {
         for (final MethodKey ctl : KEY_LIST) {
             final String key = makeStringKey(ctl.getMethod(), ctl.getParameters());
             final MethodKey out = BY_STRING.get(key);
             assertNotNull(out);
             assertEquals(ctl, out, ctl.toString() + " != " + key);
         }
 
     }
 }