/*
    * Portions of this software was developed by employees of the National Institute
    * of Standards and Technology (NIST), an agency of the Federal Government and is
    * being made available as a public service. Pursuant to title 17 United States
    * Code Section 105, works of NIST employees are not subject to copyright
    * protection in the United States. This software may be subject to foreign
    * copyright. Permission in the United States and in foreign countries, to the
    * extent that NIST may hold copyright, to use, copy, modify, create derivative
    * works, and distribute this software and its documentation without fee is hereby
   * granted on a non-exclusive basis, provided that this notice and disclaimer
   * of warranty appears in all copies.
   *
   * THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER
   * EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY
   * THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM
   * INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE
   * SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE.  IN NO EVENT
   * SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT,
   * INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM,
   * OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY,
   * CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR
   * PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT
   * OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER.
   */
  
  package gov.nist.secauto.metaschema.schemagen.json.impl;
  
  import com.fasterxml.jackson.core.JsonGenerator;
  import com.fasterxml.jackson.databind.node.JsonNodeFactory;
  import com.fasterxml.jackson.databind.node.ObjectNode;
  
  import gov.nist.secauto.metaschema.core.configuration.IConfiguration;
  import gov.nist.secauto.metaschema.core.datatype.IDataTypeAdapter;
  import gov.nist.secauto.metaschema.core.model.IAssemblyDefinition;
  import gov.nist.secauto.metaschema.core.model.IDefinition;
  import gov.nist.secauto.metaschema.core.model.IFieldDefinition;
  import gov.nist.secauto.metaschema.core.model.IFlagDefinition;
  import gov.nist.secauto.metaschema.core.model.IModule;
  import gov.nist.secauto.metaschema.core.model.IValuedDefinition;
  import gov.nist.secauto.metaschema.core.model.constraint.IAllowedValue;
  import gov.nist.secauto.metaschema.core.util.ObjectUtils;
  import gov.nist.secauto.metaschema.schemagen.AbstractGenerationState;
  import gov.nist.secauto.metaschema.schemagen.SchemaGenerationFeature;
  import gov.nist.secauto.metaschema.schemagen.json.datatype.JsonDatatypeManager;
  import gov.nist.secauto.metaschema.schemagen.json.schema.AssemblyDefinitionJsonSchema;
  import gov.nist.secauto.metaschema.schemagen.json.schema.DataTypeJsonSchema;
  import gov.nist.secauto.metaschema.schemagen.json.schema.DataTypeRestrictionDefinitionJsonSchema;
  import gov.nist.secauto.metaschema.schemagen.json.schema.FieldDefinitionJsonSchema;
  import gov.nist.secauto.metaschema.schemagen.json.schema.FlagDefinitionJsonSchema;
  import gov.nist.secauto.metaschema.schemagen.json.schema.IDefineableJsonSchema;
  import gov.nist.secauto.metaschema.schemagen.json.schema.IJsonSchema;
  
  import java.io.IOException;
  import java.util.LinkedHashSet;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  import java.util.concurrent.ConcurrentHashMap;
  
  import edu.umd.cs.findbugs.annotations.NonNull;
  
  public class JsonGenerationState
      extends AbstractGenerationState<JsonGenerator, JsonDatatypeManager> {
  
    @NonNull
    private final Set<IDefineableJsonSchema> definitionSchemas = new LinkedHashSet<>();
    @NonNull
    private final Map<IDefinition, IJsonSchema> definitionToSchemaMap = new ConcurrentHashMap<>();
    @NonNull
    private final Map<IValuedDefinition, IJsonSchema> definitionValueToDataTypeSchemaMap = new ConcurrentHashMap<>();
    @NonNull
    private final Map<IDataTypeAdapter<?>, IJsonSchema> dataTypeToSchemaMap = new ConcurrentHashMap<>();
  
    public JsonGenerationState(
        @NonNull IModule module,
        @NonNull JsonGenerator writer,
        @NonNull IConfiguration<SchemaGenerationFeature<?>> configuration) {
      super(module, writer, configuration, new JsonDatatypeManager());
    }
  
    @NonNull
    public IJsonSchema getDataTypeSchemaForDefinition(@NonNull IValuedDefinition definition) {
      IJsonSchema retval = definitionValueToDataTypeSchemaMap.get(definition);
      if (retval == null) {
        AllowedValueCollection allowedValuesCollection = getContextIndependentEnumeratedValues(definition);
        List<IAllowedValue> allowedValues = allowedValuesCollection.getValues();
  
        if (allowedValues.isEmpty()) {
          // by default, just use the built-in type
          retval = getSchema(definition.getJavaTypeAdapter());
        } else {
          IDefineableJsonSchema restriction
              = new DataTypeRestrictionDefinitionJsonSchema(definition, allowedValuesCollection);
          registerDefinitionSchema(restriction);
          retval = restriction;
        }
        definitionValueToDataTypeSchemaMap.put(definition, retval);
        retval.resolveSubSchemas(this);
     }
     return retval;
   }
 
   @NonNull
   public IJsonSchema getSchema(@NonNull IDefinition definition) {
     IJsonSchema retval = definitionToSchemaMap.get(definition);
     if (retval == null) {
       IDefineableJsonSchema definitionSchema;
       switch (definition.getModelType()) {
       case ASSEMBLY:
         definitionSchema = new AssemblyDefinitionJsonSchema((IAssemblyDefinition) definition);
         break;
       case FIELD:
         definitionSchema = new FieldDefinitionJsonSchema((IFieldDefinition) definition);
         break;
       case FLAG:
         definitionSchema = new FlagDefinitionJsonSchema((IFlagDefinition) definition);
         break;
       default:
         throw new UnsupportedOperationException(definition.getModelType().toString());
       }
       definitionToSchemaMap.put(definition, definitionSchema);
       registerDefinitionSchema(definitionSchema);
       definitionSchema.resolveSubSchemas(this);
       retval = definitionSchema;
     }
     return retval;
   }
 
   @NonNull
   public IJsonSchema getSchema(@NonNull IDataTypeAdapter<?> datatype) {
     IJsonSchema retval = dataTypeToSchemaMap.get(datatype);
     if (retval == null) {
       retval = new DataTypeJsonSchema(
           getDatatypeManager().getTypeNameForDatatype(datatype),
           datatype);
       dataTypeToSchemaMap.put(datatype, retval);
     }
     return retval;
   }
 
   protected void registerDefinitionSchema(@NonNull IDefineableJsonSchema schema) {
     if (schema.isDefinition(this)) {
       synchronized (definitionSchemas) {
         if (!definitionSchemas.contains(schema)) {
           definitionSchemas.add(schema);
         }
       }
     }
   }
 
   public ObjectNode generateDefinitions() {
     ObjectNode definitionsObject = ObjectUtils.notNull(JsonNodeFactory.instance.objectNode());
 
     for (IDefineableJsonSchema schema : definitionSchemas) {
       schema.generateDefinition(this, definitionsObject);
     }
 
     getDatatypeManager().generateDatatypes(definitionsObject);
 
     return definitionsObject;
   }
 
   @SuppressWarnings("resource")
   public void writeStartObject() throws IOException {
     getWriter().writeStartObject();
   }
 
   @SuppressWarnings("resource")
   public void writeEndObject() throws IOException {
     getWriter().writeEndObject();
   }
 
   @SuppressWarnings("resource")
   public void writeField(String fieldName, String value) throws IOException {
     getWriter().writeStringField(fieldName, value);
 
   }
 
   @SuppressWarnings("resource")
   public void writeField(String fieldName, ObjectNode obj) throws IOException {
     JsonGenerator writer = getWriter(); // NOPMD not closable here
 
     writer.writeFieldName(fieldName);
     writer.writeTree(obj);
   }
 
   @Override
   public void flushWriter() throws IOException {
     getWriter().flush();
   }
 }