/*
    * SPDX-FileCopyrightText: none
    * SPDX-License-Identifier: CC0-1.0
    */
   
   package dev.metaschema.core.model;
   
   import static org.junit.jupiter.api.Assertions.assertEquals;
   import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertSame;
  
  import org.junit.jupiter.api.Test;
  import org.mockito.Mockito;
  
  import dev.metaschema.core.model.impl.DefaultContainerModelAssemblySupport;
  import dev.metaschema.core.qname.IEnhancedQName;
  import dev.metaschema.core.util.CollectionUtil;
  
  /**
   * Tests for {@code any} instance support in container model classes.
   */
  class ContainerModelAnyInstanceTest {
  
    @Test
    void testInterfaceDefaultReturnsNull() {
      IContainerModelAssemblySupport<?, ?, ?, ?, ?, ?> empty
          = IContainerModelAssemblySupport.empty();
      assertNull(empty.getAnyInstance(), "Default getAnyInstance() should return null");
    }
  
    @Test
    void testEmptyContainerReturnsNull() {
      @SuppressWarnings("unchecked")
      DefaultContainerModelAssemblySupport<IModelInstance, INamedModelInstance,
          IFieldInstance, IAssemblyInstance, IChoiceInstance, IChoiceGroupInstance> empty
              = DefaultContainerModelAssemblySupport.EMPTY;
      assertNull(empty.getAnyInstance(), "EMPTY container should return null for getAnyInstance()");
    }
  
    @Test
    void testContainerStoresAnyInstance() {
      IAnyInstance mockAny = Mockito.mock(IAnyInstance.class);
  
      DefaultContainerModelAssemblySupport<IModelInstance, INamedModelInstance,
          IFieldInstance, IAssemblyInstance, IChoiceInstance, IChoiceGroupInstance> container
              = new DefaultContainerModelAssemblySupport<>(
                  CollectionUtil.emptyList(),
                  CollectionUtil.emptyMap(),
                  CollectionUtil.emptyMap(),
                  CollectionUtil.emptyMap(),
                  CollectionUtil.emptyList(),
                  CollectionUtil.emptyMap(),
                  mockAny);
      assertSame(mockAny, container.getAnyInstance(),
          "Container should return the IAnyInstance passed to the constructor");
    }
  
    @Test
    void testContainerConstructorWithNullAnyInstance() {
      DefaultContainerModelAssemblySupport<IModelInstance, INamedModelInstance,
          IFieldInstance, IAssemblyInstance, IChoiceInstance, IChoiceGroupInstance> container
              = new DefaultContainerModelAssemblySupport<>(
                  CollectionUtil.emptyList(),
                  CollectionUtil.emptyMap(),
                  CollectionUtil.emptyMap(),
                  CollectionUtil.emptyMap(),
                  CollectionUtil.emptyList(),
                  CollectionUtil.emptyMap(),
                  null);
      assertNull(container.getAnyInstance(),
          "Container should return null when constructed with null anyInstance");
    }
  
    @SuppressWarnings("unchecked")
    @Test
    void testBuilderDefaultAnyInstanceIsNull() {
      DefaultAssemblyModelBuilder<IModelInstance, INamedModelInstance,
          IFieldInstance, IAssemblyInstance, IChoiceInstance, IChoiceGroupInstance> builder
              = new DefaultAssemblyModelBuilder<>();
  
      assertNull(builder.getAnyInstance(),
          "Builder should return null by default for getAnyInstance()");
    }
  
    @SuppressWarnings("unchecked")
    @Test
    void testBuilderStoresAnyInstance() {
      IAnyInstance mockAny = Mockito.mock(IAnyInstance.class);
  
      DefaultAssemblyModelBuilder<IModelInstance, INamedModelInstance,
          IFieldInstance, IAssemblyInstance, IChoiceInstance, IChoiceGroupInstance> builder
              = new DefaultAssemblyModelBuilder<>();
      builder.setAnyInstance(mockAny);
  
      assertSame(mockAny, builder.getAnyInstance(),
          "Builder should return the IAnyInstance that was set");
    }
  
    @SuppressWarnings("unchecked")
   @Test
   void testBuilderPassesAnyInstanceToContainer() {
     IAnyInstance mockAny = Mockito.mock(IAnyInstance.class);
     IFieldInstance mockField = Mockito.mock(IFieldInstance.class);
     IEnhancedQName mockQName = Mockito.mock(IEnhancedQName.class);
     Mockito.when(mockQName.getIndexPosition()).thenReturn(1);
     Mockito.when(mockField.getQName()).thenReturn(mockQName);
 
     DefaultAssemblyModelBuilder<IModelInstance, INamedModelInstance,
         IFieldInstance, IAssemblyInstance, IChoiceInstance, IChoiceGroupInstance> builder
             = new DefaultAssemblyModelBuilder<>();
 
     // Add a model instance so the builder doesn't return EMPTY
     builder.append(mockField);
     builder.setAnyInstance(mockAny);
 
     IContainerModelAssemblySupport<IModelInstance, INamedModelInstance,
         IFieldInstance, IAssemblyInstance, IChoiceInstance, IChoiceGroupInstance> container
             = builder.buildAssembly();
 
     assertSame(mockAny, container.getAnyInstance(),
         "Built container should contain the IAnyInstance from the builder");
     assertEquals(1, container.getModelInstances().size(),
         "Built container should contain the field instance");
   }
 
   @SuppressWarnings("unchecked")
   @Test
   void testBuilderBuildEmptyStillReturnsNullAny() {
     DefaultAssemblyModelBuilder<IModelInstance, INamedModelInstance,
         IFieldInstance, IAssemblyInstance, IChoiceInstance, IChoiceGroupInstance> builder
             = new DefaultAssemblyModelBuilder<>();
 
     // Don't add any instances - should return empty container
     IContainerModelAssemblySupport<IModelInstance, INamedModelInstance,
         IFieldInstance, IAssemblyInstance, IChoiceInstance, IChoiceGroupInstance> container
             = builder.buildAssembly();
 
     assertNull(container.getAnyInstance(),
         "Empty built container should return null for getAnyInstance()");
   }
 }