// Copyright 2018 The Bazel Authors. All rights reserved.
//
// 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 com.google.devtools.build.lib.query2.aquery;

import static com.google.common.collect.ImmutableList.toImmutableList;
import static com.google.common.truth.Truth.assertThat;

import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.analysis.ConfiguredTargetValue;
import com.google.devtools.build.lib.analysis.config.BuildConfigurationValue;
import com.google.devtools.build.lib.query2.engine.QueryEnvironment.QueryFunction;
import com.google.devtools.build.lib.query2.testutil.PostAnalysisQueryTest;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Set;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/** Tests for {@link ActionGraphQueryEnvironment}. */
@RunWith(JUnit4.class)
public class ActionGraphQueryTest extends PostAnalysisQueryTest<ConfiguredTargetValue> {
  @Override
  protected HashMap<String, QueryFunction> getDefaultFunctions() {
    ImmutableList<QueryFunction> defaultFunctions =
        new ImmutableList.Builder<QueryFunction>()
            .addAll(ActionGraphQueryEnvironment.FUNCTIONS)
            .addAll(ActionGraphQueryEnvironment.AQUERY_FUNCTIONS)
            .build();
    HashMap<String, QueryFunction> functions = new HashMap<>();
    for (QueryFunction queryFunction : defaultFunctions) {
      functions.put(queryFunction.getName(), queryFunction);
    }
    return functions;
  }

  @Override
  protected BuildConfigurationValue getConfiguration(ConfiguredTargetValue configuredTargetValue) {
    return getHelper()
        .getSkyframeExecutor()
        .getConfiguration(
            getHelper().getReporter(),
            configuredTargetValue.getConfiguredTarget().getConfigurationKey());
  }

  @Override
  protected QueryHelper<ConfiguredTargetValue> createQueryHelper() {
    return new ActionGraphQueryHelper();
  }

  @Override
  @Test
  public void testMultipleTopLevelConfigurations_nullConfigs() throws Exception {
    writeFile(
        "test/BUILD",
        """
        java_library(
            name = "my_java",
            srcs = ["foo.java"],
        )
        """);

    Set<ConfiguredTargetValue> result = eval("//test:my_java+//test:foo.java");

    assertThat(result).hasSize(2);

    Iterator<ConfiguredTargetValue> resultIterator = result.iterator();
    ConfiguredTargetValue first = resultIterator.next();
    if (first.getConfiguredTarget().getLabel().toString().equals("//test:foo.java")) {
      assertThat(getConfiguration(first)).isNull();
      assertThat(getConfiguration(resultIterator.next())).isNotNull();
    } else {
      assertThat(getConfiguration(first)).isNotNull();
      assertThat(getConfiguration(resultIterator.next())).isNull();
    }
  }

  // Regression test for b/235526333.
  @Test
  public void testImplicitToolchainBinding_containsToolchainTarget() throws Exception {
    writeFile(
        "q/BUILD",
        """
        load(":q.bzl", "r", "tc")

        genrule(
            name = "gr",
            srcs = [],
            outs = ["gro"],
            cmd = "echo GRO > $@",
        )

        tc(
            name = "tc",
            dep = ":gr",
        )

        toolchain_type(name = "type")

        toolchain(
            name = "tc.toolchain",
            toolchain = ":tc",
            toolchain_type = ":type",
        )

        r(name = "r")
        """);
    writeFile(
        "q/q.bzl",
        """
        def _r_impl(ctx):
            gro = ctx.toolchains["//q:type"].gro
            o = ctx.actions.declare_file(ctx.label.name + ".output")
            ctx.actions.run_shell(
                inputs = depset([gro]),
                outputs = [o],
                command = "cp " + gro.path + " " + o.path,
            )
            return DefaultInfo(files = depset([o]))

        def _tc_impl(ctx):
            gro = ctx.files.dep[0]
            return [platform_common.ToolchainInfo(gro = gro)]

        tc = rule(
            implementation = _tc_impl,
            attrs = {"dep": attr.label()},
        )
        r = rule(
            implementation = _r_impl,
            toolchains = ["//q:type"],
        )
        """);
    appendToWorkspace("register_toolchains('//q:tc.toolchain')");

    Set<ConfiguredTargetValue> result = eval("deps('//q:r')");

    assertDoesNotContainEvent("Targets were missing from graph");
    assertThat(
            result.stream()
                .map(x -> x.getConfiguredTarget().getOriginalLabel().getCanonicalForm())
                .collect(toImmutableList()))
        .contains("//q:tc");
  }
}