// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <vector>

#include "base/bind.h"
#include "base/command_line.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/memory/ref_counted.h"
#include "base/path_service.h"
#include "base/run_loop.h"
#include "base/strings/string_util.h"
#include "base/threading/thread_task_runner_handle.h"
#include "base/values.h"
#include "build/build_config.h"
#include "chrome/browser/extensions/chrome_zipfile_installer.h"
#include "chrome/browser/extensions/extension_service.h"
#include "chrome/browser/extensions/load_error_reporter.h"
#include "chrome/browser/extensions/test_extension_system.h"
#include "chrome/common/chrome_paths.h"
#include "chrome/test/base/testing_profile.h"
#include "components/services/unzip/content/unzip_service.h"
#include "components/services/unzip/in_process_unzipper.h"
#include "content/public/test/browser_task_environment.h"
#include "content/public/test/test_utils.h"
#include "extensions/browser/extension_registry.h"
#include "extensions/browser/extension_registry_observer.h"
#include "extensions/common/constants.h"
#include "extensions/common/extension.h"
#include "services/data_decoder/data_decoder_service.h"
#include "services/data_decoder/public/mojom/constants.mojom.h"
#include "services/service_manager/public/cpp/connector.h"
#include "services/service_manager/public/cpp/test/test_connector_factory.h"
#include "testing/gtest/include/gtest/gtest.h"

#if defined(OS_CHROMEOS)
#include "chrome/browser/chromeos/login/users/scoped_test_user_manager.h"
#include "chrome/browser/chromeos/settings/scoped_cros_settings_test_helper.h"
#endif

namespace extensions {

namespace {

struct MockExtensionRegistryObserver : public ExtensionRegistryObserver {
  void WaitForInstall(bool expect_error) {
    extensions::LoadErrorReporter* error_reporter =
        extensions::LoadErrorReporter::GetInstance();
    error_reporter->ClearErrors();
    while (true) {
      base::RunLoop run_loop;
      // We do not get a notification if installation fails. Make sure to wake
      // up and check for errors to get an error better than the test
      // timing-out.
      // TODO(jcivelli): make LoadErrorReporter::Observer report installation
      // failures for packaged extensions so we don't have to poll.
      base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
          FROM_HERE, run_loop.QuitClosure(),
          base::TimeDelta::FromMilliseconds(100));
      quit_closure = run_loop.QuitClosure();
      run_loop.Run();
      const std::vector<base::string16>* errors = error_reporter->GetErrors();
      if (!errors->empty()) {
        if (!expect_error) {
          FAIL() << "Error(s) happened when unzipping extension: "
                 << (*errors)[0];
        }
        break;
      }
      if (!last_extension_installed.empty()) {
        // Extension install succeeded.
        EXPECT_FALSE(expect_error);
        break;
      }
    }
  }

  void OnExtensionInstalled(content::BrowserContext* browser_context,
                            const Extension* extension,
                            bool is_update) override {
    last_extension_installed = extension->id();
    quit_closure.Run();
  }

  std::string last_extension_installed;
  base::Closure quit_closure;
};

struct UnzipFileFilterTestCase {
  const base::FilePath::CharType* input;
  const bool should_unzip;
};

}  // namespace

class ZipFileInstallerTest : public testing::Test {
 public:
  ZipFileInstallerTest()
      : task_environment_(content::BrowserTaskEnvironment::IO_MAINLOOP),
        data_decoder_(test_connector_factory_.RegisterInstance(
            data_decoder::mojom::kServiceName)),
        connector_(test_connector_factory_.CreateConnector()) {
    test_connector_factory_.set_ignore_quit_requests(true);
  }

  void SetUp() override {
    extensions::LoadErrorReporter::Init(/*enable_noisy_errors=*/false);

    in_process_utility_thread_helper_.reset(
        new content::InProcessUtilityThreadHelper);
    unzip::SetUnzipperLaunchOverrideForTesting(
        base::BindRepeating(&unzip::LaunchInProcessUnzipper));

    // Create profile for extension service.
    profile_.reset(new TestingProfile());
    TestExtensionSystem* system =
        static_cast<TestExtensionSystem*>(ExtensionSystem::Get(profile_.get()));
    extension_service_ = system->CreateExtensionService(
        base::CommandLine::ForCurrentProcess(), base::FilePath(), false);
    ExtensionRegistry* registry(ExtensionRegistry::Get(profile_.get()));
    registry->AddObserver(&observer_);
  }

  void TearDown() override {
    // Need to destruct ZipFileInstaller before the message loop since
    // it posts a task to it.
    zipfile_installer_ = NULL;
    ExtensionRegistry* registry(ExtensionRegistry::Get(profile_.get()));
    registry->RemoveObserver(&observer_);
    profile_.reset();
    unzip::SetUnzipperLaunchOverrideForTesting(base::NullCallback());
    base::RunLoop().RunUntilIdle();
  }

  void RunInstaller(const std::string& zip_name, bool expect_error) {
    base::FilePath original_path;
    ASSERT_TRUE(base::PathService::Get(chrome::DIR_TEST_DATA, &original_path));
    original_path = original_path.AppendASCII("extensions")
                        .AppendASCII("zipfile_installer")
                        .AppendASCII(zip_name);
    ASSERT_TRUE(base::PathExists(original_path)) << original_path.value();
    zipfile_installer_ = ZipFileInstaller::Create(
        connector_.get(),
        MakeRegisterInExtensionServiceCallback(extension_service_));

    base::ThreadTaskRunnerHandle::Get()->PostTask(
        FROM_HERE, base::BindOnce(&ZipFileInstaller::LoadFromZipFile,
                                  zipfile_installer_, original_path));
    observer_.WaitForInstall(expect_error);
  }

  void RunZipFileFilterTest(
      const std::vector<UnzipFileFilterTestCase>& cases,
      base::RepeatingCallback<bool(const base::FilePath&)>& filter) {
    for (size_t i = 0; i < cases.size(); ++i) {
      base::FilePath input(cases[i].input);
      bool observed = filter.Run(input);
      EXPECT_EQ(cases[i].should_unzip, observed)
          << "i: " << i << ", input: " << input.value();
    }
  }

 protected:
  scoped_refptr<ZipFileInstaller> zipfile_installer_;

  std::unique_ptr<TestingProfile> profile_;
  ExtensionService* extension_service_;

  content::BrowserTaskEnvironment task_environment_;
  std::unique_ptr<content::InProcessUtilityThreadHelper>
      in_process_utility_thread_helper_;
  MockExtensionRegistryObserver observer_;

#if defined(OS_CHROMEOS)
  chromeos::ScopedCrosSettingsTestHelper cros_settings_test_helper_;
  // ChromeOS needs a user manager to instantiate an extension service.
  chromeos::ScopedTestUserManager test_user_manager_;
#endif

 private:
  service_manager::TestConnectorFactory test_connector_factory_;
  data_decoder::DataDecoderService data_decoder_;
  std::unique_ptr<service_manager::Connector> connector_;
};

TEST_F(ZipFileInstallerTest, GoodZip) {
  RunInstaller("good.zip", /*expect_error=*/false);
}

TEST_F(ZipFileInstallerTest, BadZip) {
  // Manifestless archive.
  RunInstaller("bad.zip", /*expect_error=*/true);
}

TEST_F(ZipFileInstallerTest, ZipWithPublicKey) {
  RunInstaller("public_key.zip", /*expect_error=*/false);
  const char kIdForPublicKey[] = "ikppjpenhoddphklkpdfdfdabbakkpal";
  EXPECT_EQ(observer_.last_extension_installed, kIdForPublicKey);
}

TEST_F(ZipFileInstallerTest, NonTheme_FileExtractionFilter) {
  const std::vector<UnzipFileFilterTestCase> cases = {
      {FILE_PATH_LITERAL("foo"), true},
      {FILE_PATH_LITERAL("foo.nexe"), true},
      {FILE_PATH_LITERAL("foo.dll"), true},
      {FILE_PATH_LITERAL("foo.jpg.exe"), false},
      {FILE_PATH_LITERAL("foo.exe"), false},
      {FILE_PATH_LITERAL("foo.EXE"), false},
      {FILE_PATH_LITERAL("file_without_extension"), true},
  };
  base::RepeatingCallback<bool(const base::FilePath&)> filter =
      base::BindRepeating(&ZipFileInstaller::ShouldExtractFile, false);
  RunZipFileFilterTest(cases, filter);
}

TEST_F(ZipFileInstallerTest, Theme_FileExtractionFilter) {
  const std::vector<UnzipFileFilterTestCase> cases = {
      {FILE_PATH_LITERAL("image.jpg"), true},
      {FILE_PATH_LITERAL("IMAGE.JPEG"), true},
      {FILE_PATH_LITERAL("test/image.bmp"), true},
      {FILE_PATH_LITERAL("test/IMAGE.gif"), true},
      {FILE_PATH_LITERAL("test/image.WEBP"), true},
      {FILE_PATH_LITERAL("test/dir/file.image.png"), true},
      {FILE_PATH_LITERAL("manifest.json"), true},
      {FILE_PATH_LITERAL("other.html"), false},
      {FILE_PATH_LITERAL("file_without_extension"), true},
  };
  base::RepeatingCallback<bool(const base::FilePath&)> filter =
      base::BindRepeating(&ZipFileInstaller::ShouldExtractFile, true);
  RunZipFileFilterTest(cases, filter);
}

TEST_F(ZipFileInstallerTest, ManifestExtractionFilter) {
  const std::vector<UnzipFileFilterTestCase> cases = {
      {FILE_PATH_LITERAL("manifest.json"), true},
      {FILE_PATH_LITERAL("MANIFEST.JSON"), true},
      {FILE_PATH_LITERAL("test/manifest.json"), false},
      {FILE_PATH_LITERAL("manifest.json/test"), false},
      {FILE_PATH_LITERAL("other.file"), false},
  };
  base::RepeatingCallback<bool(const base::FilePath&)> filter =
      base::BindRepeating(&ZipFileInstaller::IsManifestFile);
  RunZipFileFilterTest(cases, filter);
}

}  // namespace extensions