/*
    * SPDX-FileCopyrightText: none
    * SPDX-License-Identifier: CC0-1.0
    */
   
   package gov.nist.secauto.metaschema.databind.codegen;
   
   import gov.nist.secauto.metaschema.core.model.IModule;
   import gov.nist.secauto.metaschema.core.util.ObjectUtils;
  import gov.nist.secauto.metaschema.databind.codegen.typeinfo.IMetaschemaClassFactory;
  
  import java.io.IOException;
  import java.nio.file.Path;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.stream.Collectors;
  import java.util.stream.Stream;
  
  import edu.umd.cs.findbugs.annotations.NonNull;
  
  class ProductionImpl implements IProduction {
  
    @NonNull
    private final Map<IModule, IGeneratedModuleClass> moduleToProductionMap // NOPMD - immutable
        = new HashMap<>();
    @NonNull
    private final Map<String, IPackageProduction> packageNameToProductionMap // NOPMD - immutable
        = new HashMap<>();
  
    public void addModule(
        @NonNull IModule module,
        @NonNull IMetaschemaClassFactory classFactory,
        @NonNull Path targetDirectory) throws IOException {
      for (IModule importedModule : module.getImportedModules()) {
        assert importedModule != null;
        addModule(importedModule, classFactory, targetDirectory);
      }
  
      if (moduleToProductionMap.get(module) == null) {
        IGeneratedModuleClass metaschemaClass = classFactory.generateClass(module, targetDirectory);
        moduleToProductionMap.put(module, metaschemaClass);
      }
    }
  
    protected IPackageProduction addPackage(
        @NonNull PackageMetadata metadata,
        @NonNull IMetaschemaClassFactory classFactory,
        @NonNull Path targetDirectory)
        throws IOException {
      String javaPackage = metadata.getPackageName();
  
      IPackageProduction retval
          = new PackageProductionImpl(
              metadata,
              classFactory,
              targetDirectory);
      packageNameToProductionMap.put(javaPackage, retval);
      return retval;
    }
  
    @Override
    @SuppressWarnings("null")
    public Collection<IGeneratedModuleClass> getModuleProductions() {
      return Collections.unmodifiableCollection(moduleToProductionMap.values());
    }
  
    @SuppressWarnings("null")
    @NonNull
    protected Collection<IPackageProduction> getPackageProductions() {
      return Collections.unmodifiableCollection(packageNameToProductionMap.values());
    }
  
    @Override
    public IGeneratedModuleClass getModuleProduction(IModule module) {
      return moduleToProductionMap.get(module);
    }
  
    @Override
    public List<IGeneratedDefinitionClass> getGlobalDefinitionClasses() {
      return ObjectUtils.notNull(getModuleProductions().stream()
          .flatMap(metaschema -> metaschema.getGeneratedDefinitionClasses().stream())
          .collect(Collectors.toUnmodifiableList()));
    }
  
    @Override
    public Stream<? extends IGeneratedClass> getGeneratedClasses() {
      return ObjectUtils.notNull(Stream.concat(
          // generated definitions and Metaschema module
          getModuleProductions().stream()
              .flatMap(module -> Stream.concat(
                  Stream.of(module),
                  module.getGeneratedDefinitionClasses().stream())),
          // generated package-info.java
          getPackageProductions().stream()
              .flatMap(javaPackage -> Stream.of(javaPackage.getGeneratedClass()))));
    }
 
 }