// 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.bazel.rules.python;

import static com.google.common.truth.Truth.assertThat;
import static org.junit.Assert.assertThrows;

import com.google.devtools.build.lib.analysis.config.InvalidConfigurationException;
import com.google.devtools.build.lib.analysis.util.ConfigurationTestCase;
import com.google.devtools.common.options.OptionsParsingException;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/** Tests for {@link BazelPythonConfiguration}. */
@RunWith(JUnit4.class)
public class BazelPythonConfigurationTest extends ConfigurationTestCase {

  @Test
  public void pythonTop() throws Exception {
    scratch.file(
        "a/BUILD",
        "py_runtime(name='b', files=[], interpreter='c')");
    BazelPythonConfiguration config =
        create("--incompatible_use_python_toolchains=false", "--python_top=//a:b")
            .getFragment(BazelPythonConfiguration.class);
    assertThat(config.getPythonTop()).isNotNull();
  }

  @Test
  public void pythonTop_malformedLabel() {
    OptionsParsingException expected =
        assertThrows(
            OptionsParsingException.class,
            () -> create("--incompatible_use_python_toolchains=false", "--python_top=//a:!b:"));
    assertThat(expected).hasMessageThat().contains("While parsing option --python_top");
  }

  @Test
  public void pythonPath() throws Exception {
    BazelPythonConfiguration config = create("--python_path=/pajama")
        .getFragment(BazelPythonConfiguration.class);
    assertThat(config.getPythonPath()).isEqualTo("/pajama");
  }

  @Test
  public void pythonPathMustBeAbsolute() {
    InvalidConfigurationException expected = assertThrows(
        InvalidConfigurationException.class,
        () -> create("--python_path=pajama"));
    assertThat(expected).hasMessageThat().contains("python_path must be an absolute path");
  }

  @Test
  public void legacyFlagsDeprecatedByPythonToolchains() throws Exception {
    checkError(
        "`--python2_path` is disabled by `--incompatible_use_python_toolchains`",
        "--incompatible_use_python_toolchains=true",
        "--python2_path=/system/python2");
    checkError(
        "`--python3_path` is disabled by `--incompatible_use_python_toolchains`",
        "--incompatible_use_python_toolchains=true",
        "--python3_path=/system/python3");
    checkError(
        "`--python_top` is disabled by `--incompatible_use_python_toolchains`",
        "--incompatible_use_python_toolchains=true",
        "--python_top=//mypkg:my_py_runtime");
    // TODO(#7901): Also test that --python_path is disallowed (once implemented). Currently we
    // still need it to communicate the location of python.exe on Windows from the client to the
    // server.
  }
}