/*
 * Copyright (C) 2021 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.earlyentrypoint;

import com.squareup.javapoet.AnnotationSpec;
import com.squareup.javapoet.ClassName;
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.TypeElement;

/**
 * Generates an {@link dagger.hilt.android.internal.earlyentrypoint.AggregatedEarlyEntryPoint}
 * annotation.
 */
final class AggregatedEarlyEntryPointGenerator {

  private final ProcessingEnvironment env;
  private final TypeElement earlyEntryPoint;

  AggregatedEarlyEntryPointGenerator(TypeElement earlyEntryPoint, ProcessingEnvironment env) {
    this.earlyEntryPoint = earlyEntryPoint;
    this.env = env;
  }

  void generate() throws IOException {
    ClassName name =
        ClassName.get(
            ClassNames.AGGREGATED_EARLY_ENTRY_POINT_PACKAGE,
            Processors.getFullEnclosedName(earlyEntryPoint) + "_AggregatedEarlyEntryPoint");

    TypeSpec.Builder builder =
        TypeSpec.classBuilder(name)
            .addOriginatingElement(earlyEntryPoint)
            .addAnnotation(
                AnnotationSpec.builder(ClassNames.AGGREGATED_EARLY_ENTRY_POINT)
                    .addMember("earlyEntryPoint", "$S", earlyEntryPoint.getQualifiedName())
                    .build());

    Processors.addGeneratedAnnotation(builder, env, getClass());

    JavaFile.builder(name.packageName(), builder.build()).build().writeTo(env.getFiler());
  }
}