/*
 * Copyright (C) 2016 The Dagger Authors.
 *
 * Licensed 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 dagger.internal.codegen;

import com.squareup.javapoet.AnnotationSpec;
import dagger.internal.GenerationOptions;
import javax.lang.model.element.TypeElement;
import javax.tools.Diagnostic;

/** A collection of options that dictate how the compiler will run. */
abstract class CompilerOptions {
  abstract boolean usesProducers();

  /**
   * Returns true if the fast initialization flag, {@code fastInit}, is enabled.
   *
   * <p>If enabled, the generated code will attempt to optimize for fast component initialization.
   * This is done by reducing the number of factory classes loaded during initialization and the
   * number of eagerly initialized fields at the cost of potential memory leaks and higher
   * per-provision instantiation time.
   */
  abstract boolean fastInit();

  abstract boolean formatGeneratedSource();

  abstract boolean writeProducerNameInToken();

  abstract Diagnostic.Kind nullableValidationKind();

  final boolean doCheckForNulls() {
    return nullableValidationKind().equals(Diagnostic.Kind.ERROR);
  }

  abstract Diagnostic.Kind privateMemberValidationKind();

  abstract Diagnostic.Kind staticMemberValidationKind();

  /**
   * If {@code true}, Dagger will generate factories and components even if some members-injected
   * types have {@code private} or {@code static} {@code @Inject}-annotated members.
   *
   * <p>This should only ever be enabled by the TCK tests. Disabling this validation could lead to
   * generating code that does not compile.
   */
  abstract boolean ignorePrivateAndStaticInjectionForComponent();

  abstract ValidationType scopeCycleValidationType();

  abstract boolean warnIfInjectionFactoryNotGeneratedUpstream();

  abstract boolean headerCompilation();

  abstract boolean aheadOfTimeSubcomponents();

  /**
   * Enables a testing configuration where all superclass {@link ComponentImplementation}s are
   * derived from their serialized forms.
   */
  abstract boolean forceUseSerializedComponentImplementations();

  /**
   * If {@code true}, in {@link #aheadOfTimeSubcomponents()} mode, Dagger will emit metadata
   * annotations to deserialize aspects of the {@link ComponentImplementation}.
   *
   * This should only be disabled in compile-testing tests that want to ignore the annotations when
   * asserting on generated source.
   */
  abstract boolean emitModifiableMetadataAnnotations();

  abstract boolean useGradleIncrementalProcessing();

  /**
   * Returns the validation that should be done for the full binding graph for the element.
   *
   * @throws IllegalArgumentException if {@code element} is not a module or (sub)component
   */
  abstract ValidationType fullBindingGraphValidationType(TypeElement element);

  abstract Diagnostic.Kind moduleHasDifferentScopesDiagnosticKind();

  abstract ValidationType explicitBindingConflictsWithInjectValidationType();

  /**
   * Creates a new {@link CompilerOptions} from the serialized {@link GenerationOptions} of a base
   * component implementation.
   */
  final CompilerOptions withGenerationOptions(GenerationOptions generationOptions) {
    return new ForwardingCompilerOptions(this) {
      @Override
      public boolean fastInit() {
        return generationOptions.fastInit();
      }
    };
  }

  /**
   * Returns a {@link GenerationOptions} annotation that serializes any options for this compilation
   * that should be reused in future compilations.
   */
  final AnnotationSpec toGenerationOptionsAnnotation() {
    return AnnotationSpec.builder(GenerationOptions.class)
        .addMember("fastInit", "$L", fastInit())
        .build();
  }
}