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/*
 * Copyright (C) 2020 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.hilt.processor.internal.aliasof;

import com.squareup.javapoet.AnnotationSpec;
import com.squareup.javapoet.JavaFile;
import com.squareup.javapoet.TypeSpec;
import dagger.hilt.processor.internal.ClassNames;
import dagger.hilt.processor.internal.Processors;
import java.io.IOException;
import javax.annotation.processing.ProcessingEnvironment;
import javax.lang.model.element.Element;

/** Generates resource files for {@link dagger.hilt.migration.AliasOf}. */
final class AliasOfPropagatedDataGenerator {

  private final ProcessingEnvironment processingEnv;
  private final Element aliasScope;
  private final Element defineComponentScope;

  AliasOfPropagatedDataGenerator(
      ProcessingEnvironment processingEnv, Element aliasScope, Element defineComponentScope) {
    this.processingEnv = processingEnv;
    this.aliasScope = aliasScope;
    this.defineComponentScope = defineComponentScope;
  }

  void generate() throws IOException {
    TypeSpec.Builder generator =
        TypeSpec.classBuilder(Processors.getFullEnclosedName(aliasScope))
            .addOriginatingElement(aliasScope)
            .addAnnotation(
                AnnotationSpec.builder(ClassNames.ALIAS_OF_PROPAGATED_DATA)
                    .addMember("defineComponentScope", "$T.class", defineComponentScope)
                    .addMember("alias", "$T.class", aliasScope)
                    .build())
            .addJavadoc("Generated class for aggregating scope aliases. \n");

    Processors.addGeneratedAnnotation(generator, processingEnv, getClass());

    JavaFile.builder(AliasOfs.AGGREGATING_PACKAGE, generator.build())
        .build()
        .writeTo(processingEnv.getFiler());
  }
}