/*
 * Copyright (C) 2014 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.
 */

// TODO(beder): Merge the error-handling tests with the ModuleFactoryGeneratorTest.
package dagger.internal.codegen;

import static dagger.internal.codegen.DaggerModuleMethodSubject.Factory.assertThatMethodInUnannotatedClass;
import static dagger.internal.codegen.DaggerModuleMethodSubject.Factory.assertThatProductionModuleMethod;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

import androidx.room.compiler.processing.util.Source;
import com.google.common.collect.ImmutableMap;
import com.google.common.util.concurrent.ListenableFuture;
import dagger.testing.compile.CompilerTests;
import dagger.testing.golden.GoldenFileRule;
import java.lang.annotation.Retention;
import javax.inject.Qualifier;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

@RunWith(JUnit4.class)
public class ProducerModuleFactoryGeneratorTest {

  @Rule public GoldenFileRule goldenFileRule = new GoldenFileRule();

  @Test public void producesMethodNotInModule() {
    assertThatMethodInUnannotatedClass("@Produces String produceString() { return null; }")
        .hasError("@Produces methods can only be present within a @ProducerModule");
  }

  @Test public void producesMethodAbstract() {
    assertThatProductionModuleMethod("@Produces abstract String produceString();")
        .hasError("@Produces methods cannot be abstract");
  }

  @Test public void producesMethodPrivate() {
    assertThatProductionModuleMethod("@Produces private String produceString() { return null; }")
        .hasError("@Produces methods cannot be private");
  }

  @Test public void producesMethodReturnVoid() {
    assertThatProductionModuleMethod("@Produces void produceNothing() {}")
        .hasError("@Produces methods must return a value (not void)");
  }

  @Test
  public void producesProvider() {
    assertThatProductionModuleMethod("@Produces Provider<String> produceProvider() {}")
        .hasError("@Produces methods must not return framework types");
  }

  @Test
  public void producesLazy() {
    assertThatProductionModuleMethod("@Produces Lazy<String> produceLazy() {}")
        .hasError("@Produces methods must not return framework types");
  }

  @Test
  public void producesMembersInjector() {
    assertThatProductionModuleMethod(
            "@Produces MembersInjector<String> produceMembersInjector() {}")
        .hasError("@Produces methods must not return framework types");
  }

  @Test
  public void producesProducer() {
    assertThatProductionModuleMethod("@Produces Producer<String> produceProducer() {}")
        .hasError("@Produces methods must not return framework types");
  }

  @Test
  public void producesProduced() {
    assertThatProductionModuleMethod("@Produces Produced<String> produceProduced() {}")
        .hasError("@Produces methods must not return framework types");
  }

  @Test public void producesMethodReturnRawFuture() {
    assertThatProductionModuleMethod("@Produces ListenableFuture produceRaw() {}")
        .importing(ListenableFuture.class)
        .hasError("@Produces methods cannot return a raw ListenableFuture");
  }

  @Test public void producesMethodReturnWildcardFuture() {
    assertThatProductionModuleMethod("@Produces ListenableFuture<?> produceRaw() {}")
        .importing(ListenableFuture.class)
        .hasError(
            "@Produces methods can return only a primitive, an array, a type variable, "
                + "a declared type, or a ListenableFuture of one of those types");
  }

  @Test public void producesMethodWithTypeParameter() {
    assertThatProductionModuleMethod("@Produces <T> String produceString() { return null; }")
        .hasError("@Produces methods may not have type parameters");
  }

  @Test public void producesMethodSetValuesWildcard() {
    assertThatProductionModuleMethod(
            "@Produces @ElementsIntoSet Set<?> produceWildcard() { return null; }")
        .hasError(
            "@Produces methods can return only a primitive, an array, a type variable, "
                + "a declared type, or a ListenableFuture of one of those types");
  }

  @Test public void producesMethodSetValuesRawSet() {
    assertThatProductionModuleMethod(
            "@Produces @ElementsIntoSet Set produceSomething() { return null; }")
        .hasError("@Produces methods annotated with @ElementsIntoSet cannot return a raw Set");
  }

  @Test public void producesMethodSetValuesNotASet() {
    assertThatProductionModuleMethod(
            "@Produces @ElementsIntoSet List<String> produceStrings() { return null; }")
        .hasError(
            "@Produces methods of type set values must return a Set or ListenableFuture of Set");
  }

  @Test public void producesMethodSetValuesWildcardInFuture() {
    assertThatProductionModuleMethod(
            "@Produces @ElementsIntoSet "
                + "ListenableFuture<Set<?>> produceWildcard() { return null; }")
        .importing(ListenableFuture.class)
        .hasError(
            "@Produces methods can return only a primitive, an array, a type variable, "
                + "a declared type, or a ListenableFuture of one of those types");
  }

  @Test public void producesMethodSetValuesFutureRawSet() {
    assertThatProductionModuleMethod(
            "@Produces @ElementsIntoSet ListenableFuture<Set> produceSomething() { return null; }")
        .importing(ListenableFuture.class)
        .hasError("@Produces methods annotated with @ElementsIntoSet cannot return a raw Set");
  }

  @Test public void producesMethodSetValuesFutureNotASet() {
    assertThatProductionModuleMethod(
            "@Produces @ElementsIntoSet "
                + "ListenableFuture<List<String>> produceStrings() { return null; }")
        .importing(ListenableFuture.class)
        .hasError(
            "@Produces methods of type set values must return a Set or ListenableFuture of Set");
  }

  @Test public void multipleProducesMethodsWithSameName() {
    Source moduleFile =
        CompilerTests.javaSource(
            "test.TestModule",
            "package test;",
            "",
            "import dagger.producers.ProducerModule;",
            "import dagger.producers.Produces;",
            "",
            "@ProducerModule",
            "final class TestModule {",
            "  @Produces Object produce(int i) {",
            "    return i;",
            "  }",
            "",
            "  @Produces String produce() {",
            "    return \"\";",
            "  }",
            "}");
    String errorMessage =
        "Cannot have more than one binding method with the same name in a single module";
    CompilerTests.daggerCompiler(moduleFile)
        .compile(
            subject -> {
              subject.hasErrorCount(2);
              subject.hasErrorContaining(errorMessage).onSource(moduleFile).onLine(8);
              subject.hasErrorContaining(errorMessage).onSource(moduleFile).onLine(12);
            });
  }

  @Test
  public void producesMethodThrowsThrowable() {
    assertThatProductionModuleMethod("@Produces int produceInt() throws Throwable { return 0; }")
        .hasError(
            "@Produces methods may only throw unchecked exceptions or exceptions subclassing "
                + "Exception");
  }

  @Test public void producesMethodWithScope() {
    assertThatProductionModuleMethod("@Produces @Singleton String str() { return \"\"; }")
        .hasError("@Produces methods cannot be scoped");
  }

  @Test
  public void privateModule() {
    Source moduleFile =
        CompilerTests.javaSource("test.Enclosing",
        "package test;",
        "",
        "import dagger.producers.ProducerModule;",
        "",
        "final class Enclosing {",
        "  @ProducerModule private static final class PrivateModule {",
        "  }",
        "}");
    CompilerTests.daggerCompiler(moduleFile)
        .compile(
            subject -> {
              subject.hasErrorCount(1);
              subject.hasErrorContaining("Modules cannot be private")
                  .onSource(moduleFile)
                  .onLine(6);
            });
  }


  @Test
  public void enclosedInPrivateModule() {
    Source moduleFile =
        CompilerTests.javaSource(
            "test.Enclosing",
            "package test;",
            "",
            "import dagger.producers.ProducerModule;",
            "",
            "final class Enclosing {",
            "  private static final class PrivateEnclosing {",
            "    @ProducerModule static final class TestModule {",
            "    }",
            "  }",
            "}");
    CompilerTests.daggerCompiler(moduleFile)
        .compile(
            subject -> {
              subject.hasErrorCount(1);
              subject.hasErrorContaining("Modules cannot be enclosed in private types")
                  .onSource(moduleFile)
                  .onLine(7);
            });
  }

  @Test
  public void includesNonModule() {
    Source xFile =
        CompilerTests.javaSource(
            "test.X",
            "package test;",
            "",
            "public final class X {}");
    Source moduleFile =
        CompilerTests.javaSource(
            "test.FooModule",
            "package test;",
            "",
            "import dagger.producers.ProducerModule;",
            "",
            "@ProducerModule(includes = X.class)",
            "public final class FooModule {",
            "}");
    CompilerTests.daggerCompiler(xFile, moduleFile)
        .compile(
            subject -> {
              subject.hasErrorCount(1);
              subject.hasErrorContaining(
                      "X is listed as a module, but is not annotated with one of @Module, "
                          + "@ProducerModule");
            });
  }

  // TODO(ronshapiro): merge this with the equivalent test in ModuleFactoryGeneratorTest and make it
  // parameterized
  @Test
  public void publicModuleNonPublicIncludes() {
    Source publicModuleFile =
        CompilerTests.javaSource(
            "test.PublicModule",
            "package test;",
            "",
            "import dagger.producers.ProducerModule;",
            "",
            "@ProducerModule(includes = {",
            "    BadNonPublicModule.class, OtherPublicModule.class, OkNonPublicModule.class",
            "})",
            "public final class PublicModule {}");
    Source badNonPublicModuleFile =
        CompilerTests.javaSource(
            "test.BadNonPublicModule",
            "package test;",
            "",
            "import dagger.producers.ProducerModule;",
            "import dagger.producers.Produces;",
            "",
            "@ProducerModule",
            "final class BadNonPublicModule {",
            "  @Produces",
            "  int produceInt() {",
            "    return 42;",
            "  }",
            "}");
    Source okNonPublicModuleFile =
        CompilerTests.javaSource(
            "test.OkNonPublicModule",
            "package test;",
            "",
            "import dagger.producers.ProducerModule;",
            "import dagger.producers.Produces;",
            "",
            "@ProducerModule",
            "final class OkNonPublicModule {",
            "  @Produces",
            "  static String produceString() {",
            "    return \"foo\";",
            "  }",
            "}");
    Source otherPublicModuleFile =
        CompilerTests.javaSource(
            "test.OtherPublicModule",
            "package test;",
            "",
            "import dagger.producers.ProducerModule;",
            "",
            "@ProducerModule",
            "public final class OtherPublicModule {",
            "}");
    CompilerTests.daggerCompiler(
            publicModuleFile,
            badNonPublicModuleFile,
            okNonPublicModuleFile,
            otherPublicModuleFile)
        .compile(
            subject -> {
              subject.hasErrorCount(1);
              subject.hasErrorContaining(
                  "This module is public, but it includes non-public (or effectively non-public) "
                      + "modules (test.BadNonPublicModule) that have non-static, non-abstract "
                      + "binding methods. Either reduce the visibility of this module, make the "
                      + "included modules public, or make all of the binding methods on the "
                      + "included modules abstract or static.")
                  .onSource(publicModuleFile)
                  .onLine(8);
            });
  }

  @Test public void argumentNamedModuleCompiles() {
    Source moduleFile =
        CompilerTests.javaSource(
            "test.TestModule",
            "package test;",
            "",
            "import dagger.producers.ProducerModule;",
            "import dagger.producers.Produces;",
            "",
            "@ProducerModule",
            "final class TestModule {",
            "  @Produces String produceString(int module) {",
            "    return null;",
            "  }",
            "}");
    CompilerTests.daggerCompiler(moduleFile)
        .compile(subject -> subject.hasErrorCount(0));
  }

  @Test public void singleProducesMethodNoArgsFuture() {
    Source moduleFile =
        CompilerTests.javaSource(
            "test.TestModule",
            "package test;",
            "",
            "import com.google.common.util.concurrent.ListenableFuture;",
            "import dagger.producers.ProducerModule;",
            "import dagger.producers.Produces;",
            "",
            "@ProducerModule",
            "final class TestModule {",
            "  @Produces ListenableFuture<String> produceString() {",
            "    return null;",
            "  }",
            "}");
    CompilerTests.daggerCompiler(moduleFile)
        .compile(
            subject -> {
              subject.hasErrorCount(0);
              subject.generatedSource(
                  goldenFileRule.goldenSource("test/TestModule_ProduceStringFactory"));
            });
  }

  @Test
  public void singleProducesMethodNoArgsFutureWithProducerName() {
    Source moduleFile =
        CompilerTests.javaSource(
            "test.TestModule",
            "package test;",
            "",
            "import com.google.common.util.concurrent.Futures;",
            "import com.google.common.util.concurrent.ListenableFuture;",
            "import dagger.producers.ProducerModule;",
            "import dagger.producers.Produces;",
            "",
            "@ProducerModule",
            "final class TestModule {",
            "  @Produces ListenableFuture<String> produceString() {",
            "    return Futures.immediateFuture(\"\");",
            "  }",
            "}");
    CompilerTests.daggerCompiler(moduleFile)
        .withProcessingOptions(ImmutableMap.of("dagger.writeProducerNameInToken", "ENABLED"))
        .compile(
            subject -> {
              subject.hasErrorCount(0);
              subject.generatedSource(
                  goldenFileRule.goldenSource("test/TestModule_ProduceStringFactory"));
            });
  }

  @Test
  public void producesMethodMultipleQualifiersOnMethod() {
    assertThatProductionModuleMethod(
            "@Produces @QualifierA @QualifierB static String produceString() { return null; }")
        .importing(ListenableFuture.class, QualifierA.class, QualifierB.class)
        .hasError("may not use more than one @Qualifier");
  }

  @Test
  public void producesMethodMultipleQualifiersOnParameter() {
    assertThatProductionModuleMethod(
            "@Produces static String produceString(@QualifierA @QualifierB Object input) "
                + "{ return null; }")
        .importing(ListenableFuture.class, QualifierA.class, QualifierB.class)
        .hasError("may not use more than one @Qualifier");
  }

  @Test
  public void producesMethodWildcardDependency() {
    assertThatProductionModuleMethod(
            "@Produces static String produceString(Provider<? extends Number> numberProvider) "
                + "{ return null; }")
        .importing(ListenableFuture.class, QualifierA.class, QualifierB.class)
        .hasError(
            "Dagger does not support injecting Provider<T>, Lazy<T>, Producer<T>, or Produced<T> "
                + "when T is a wildcard type such as ? extends java.lang.Number");
  }

  @Qualifier
  @Retention(RUNTIME)
  public @interface QualifierA {}

  @Qualifier
  @Retention(RUNTIME)
  public @interface QualifierB {}
}