/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2022, QOS.ch. All rights reserved.
    *
    * This program and the accompanying materials are dual-licensed under
    * either the terms of the Eclipse Public License v1.0 as published by
    * the Eclipse Foundation
    *
    *   or (per the licensee's choosing)
   *
   * under the terms of the GNU Lesser General Public License version 2.1
   * as published by the Free Software Foundation.
   */
  package ch.qos.logback.core.model.processor;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.Properties;
  import java.util.Stack;
  import java.util.function.Supplier;
  
  import ch.qos.logback.core.Appender;
  import ch.qos.logback.core.Context;
  import ch.qos.logback.core.joran.GenericXMLConfigurator;
  import ch.qos.logback.core.joran.JoranConfiguratorBase;
  import ch.qos.logback.core.joran.JoranConstants;
  import ch.qos.logback.core.joran.spi.DefaultNestedComponentRegistry;
  import ch.qos.logback.core.joran.util.beans.BeanDescriptionCache;
  import ch.qos.logback.core.model.Model;
  import ch.qos.logback.core.model.util.VariableSubstitutionsHelper;
  import ch.qos.logback.core.spi.AppenderAttachable;
  import ch.qos.logback.core.spi.ContextAwareBase;
  import ch.qos.logback.core.spi.ContextAwarePropertyContainer;
  import ch.qos.logback.core.spi.PropertyContainer;
  
  public class ModelInterpretationContext extends ContextAwareBase implements ContextAwarePropertyContainer {
  
      Stack<Object> objectStack;
      Stack<Model> modelStack;
  
      /**
       * A supplier of JoranConfigurator instances.
       *
       * May be null.
       *
       * @since 1.5.5
       */
      Supplier<? extends GenericXMLConfigurator> configuratorSupplier;
  
  
      Map<String, Object> objectMap;
      protected VariableSubstitutionsHelper variableSubstitutionsHelper;
      protected Map<String, String> importMap;
  
      final private BeanDescriptionCache beanDescriptionCache;
      final DefaultNestedComponentRegistry defaultNestedComponentRegistry = new DefaultNestedComponentRegistry();
      List<DependencyDefinition> dependencyDefinitionList = new ArrayList<>();
      final List<String> startedDependees = new ArrayList<>();
  
      Object configuratorHint;
  
      Model topModel;
  
      public ModelInterpretationContext(Context context) {
          this(context, null);
      }
  
      public ModelInterpretationContext(Context context, Object configuratorHint) {
          this.context = context;
          this.configuratorHint = configuratorHint;
          this.objectStack = new Stack<>();
          this.modelStack = new Stack<>();
          this.beanDescriptionCache = new BeanDescriptionCache(context);
          objectMap = new HashMap<>(5);
          variableSubstitutionsHelper = new VariableSubstitutionsHelper(context);
          importMap = new HashMap<>(5);
      }
  
      public ModelInterpretationContext(ModelInterpretationContext otherMic) {
          this(otherMic.context, otherMic.configuratorHint);
          importMap = new HashMap<>(otherMic.importMap);
          variableSubstitutionsHelper =  new VariableSubstitutionsHelper(context, otherMic.getCopyOfPropertyMap());
          defaultNestedComponentRegistry.duplicate(otherMic.getDefaultNestedComponentRegistry());
          createAppenderBags();
      } 
          
      public Map<String, Object> getObjectMap() {
          return objectMap;
      }
  
      public void createAppenderBags() {
          objectMap.put(JoranConstants.APPENDER_BAG, new HashMap<String, Appender<?>>());
          objectMap.put(JoranConstants.APPENDER_REF_BAG, new HashMap<String, AppenderAttachable<?>>());
      }
  
      public Model getTopModel() {
         return topModel;
     }
 
     public void setTopModel(Model topModel) {
         this.topModel = topModel;
     }
 
     // modelStack =================================
 
     public void pushModel(Model m) {
         modelStack.push(m);
     }
 
     public Model peekModel() {
         return modelStack.peek();
     }
 
     public boolean isModelStackEmpty() {
         return modelStack.isEmpty();
     }
 
     public Model popModel() {
         return modelStack.pop();
     }
 
     // =================== object stack
 
     public Stack<Object> getObjectStack() {
         return objectStack;
     }
 
     public boolean isObjectStackEmpty() {
         return objectStack.isEmpty();
     }
 
     public Object peekObject() {
         return objectStack.peek();
     }
 
     public void pushObject(Object o) {
         objectStack.push(o);
     }
 
     public Object popObject() {
         return objectStack.pop();
     }
 
     public Object getObject(int i) {
         return objectStack.get(i);
     }
 
     // ===================== END object stack
 
     public Object getConfiguratorHint() {
         return configuratorHint;
     }
 
     public void setConfiguratorHint(Object configuratorHint) {
         this.configuratorHint = configuratorHint;
     }
 
     public BeanDescriptionCache getBeanDescriptionCache() {
         return beanDescriptionCache;
     }
 
     public String subst(String ref)  {
 
         String substituted = variableSubstitutionsHelper.subst(ref);
         if(ref != null && !ref.equals(substituted)) {
             addInfo("value \""+substituted+"\" substituted for \""+ref+"\"");
         }
         return substituted;
     }
 
 
     public DefaultNestedComponentRegistry getDefaultNestedComponentRegistry() {
         return defaultNestedComponentRegistry;
     }
 
     // ================================== dependencies
 
     public void addDependencyDefinition(DependencyDefinition dd) {
         dependencyDefinitionList.add(dd);
     }
 
     public List<DependencyDefinition> getDependencyDefinitions() {
         return Collections.unmodifiableList(dependencyDefinitionList);
     }
 
     public List<String> getDependeeNamesForModel(Model model) {
         List<String> dependencyList = new ArrayList<>();
         for (DependencyDefinition dd : dependencyDefinitionList) {
             if (dd.getDepender() == model) {
                dependencyList.add(dd.getDependee());
             }
         }
         return dependencyList;
     }
 
     public boolean hasDependers(String dependeeName) {
 
         if (dependeeName == null || dependeeName.trim().length() == 0) {
             new IllegalArgumentException("Empty dependeeName name not allowed here");
         }
 
         for (DependencyDefinition dd : dependencyDefinitionList) {
             if (dd.dependee.equals(dependeeName))
                 return true;
         }
 
         return false;
     }
 
 
     public void markStartOfNamedDependee(String name) {
         startedDependees.add(name);
     }
 
     public boolean isNamedDependeeStarted(String name) {
         return startedDependees.contains(name);
     }
 
     // ========================================== object map
 
     /**
      * Add a property to the properties of this execution context. If the property
      * exists already, it is overwritten.
      */
     @Override
     public void addSubstitutionProperty(String key, String value) {
         variableSubstitutionsHelper.addSubstitutionProperty(key, value);
     }
 
     /**
      * If a key is found in propertiesMap then return it. Otherwise, delegate to the
      * context.
      */
     public String getProperty(String key) {
       return  variableSubstitutionsHelper.getProperty(key);
     }
 
     @Override
     public Map<String, String> getCopyOfPropertyMap() {
         return variableSubstitutionsHelper.getCopyOfPropertyMap();
     }
 
     // imports ===================================================================
 
     /**
      * Add an import to the importMao
      * 
      * @param stem the class to import
      * @param fqcn the fully qualified name of the class
      * 
      * @since 1.3
      */
     public void addImport(String stem, String fqcn) {
         importMap.put(stem, fqcn);
     }
 
     public Map<String, String> getImportMapCopy() {
         return new HashMap<>(importMap);
     }
 
     
     /**
      * Given a stem, get the fully qualified name of the class corresponding to the
      * stem. For unknown stems, returns the stem as is. If stem is null, null is
      * returned.
      * 
      * @param stem may be null
      * @return fully qualified name of the class corresponding to the stem. For
      *         unknown stems, returns the stem as is. If stem is null, null is
      *         returned.
      * @since 1.3
      */
     public String getImport(String stem) {
         if (stem == null)
             return null;
 
         String result = importMap.get(stem);
         if (result == null)
             return stem;
         else
             return result;
     }
 
     /**
      * Returns a supplier of {@link GenericXMLConfigurator} instance. The returned value may be null.
      *
      * @return a supplier of {@link GenericXMLConfigurator} instance, may be null
      */
     @Override
     public Supplier<? extends GenericXMLConfigurator> getConfiguratorSupplier() {
         return this.configuratorSupplier;
     }
 
     /**
      *
      * @param configuratorSupplier
      */
     public void setConfiguratorSupplier(Supplier<? extends GenericXMLConfigurator> configuratorSupplier) {
         this.configuratorSupplier = configuratorSupplier;
     }
 }