// Copyright 2010-2015, Google Inc.
// All rights reserved.
//
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// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
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// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include "base/update_util.h"

#include <string>

#ifdef OS_WIN
#include "base/win_api_test_helper.h"
#endif  // OS_WIN
#include "testing/base/public/gunit.h"

namespace mozc {
namespace {

#ifdef OS_WIN

class UpdateUtilTestWin : public testing::Test {
 protected:
  struct CallResult {
    CallResult()
        : created_key(nullptr),
          reg_create_key_ex_called(false),
          reg_set_value_ex_called(false),
          written_type(0),
          reg_close_key_called(false) {}

    HKEY created_key;
    bool reg_create_key_ex_called;
    wstring created_key_path;
    bool reg_set_value_ex_called;
    wstring written_value_name;
    wstring written_value;
    DWORD written_type;
    bool reg_close_key_called;
  };

  static void SetUpTestCase() {
    vector<WinAPITestHelper::HookRequest> requests;
    requests.push_back(
        DEFINE_HOOK("advapi32.dll", RegCreateKeyExW, HookRegCreateKeyExW));
    requests.push_back(
        DEFINE_HOOK("advapi32.dll", RegSetValueExW, HookRegSetValueExW));
    requests.push_back(
        DEFINE_HOOK("advapi32.dll", RegCloseKey, HookRegCloseKey));

    hook_restore_info_ = WinAPITestHelper::DoHook(
        ::GetModuleHandle(nullptr), requests);
  }

  static void TearDownTestCase() {
    WinAPITestHelper::RestoreHook(hook_restore_info_);
    hook_restore_info_ = nullptr;
    delete call_result_;
    call_result_ = nullptr;
  }

  virtual void SetUp() {
    call_result_ = new CallResult();
  }
  virtual void TearDown() {
    delete call_result_;
    call_result_ = nullptr;
  }

  static const CallResult& call_result() {
    return *call_result_;
  }

 private:
  static LSTATUS WINAPI HookRegCreateKeyExW(
      HKEY hkey, LPCWSTR sub_key, DWORD reserved, LPWSTR class_name,
      DWORD options, REGSAM sam,
      const LPSECURITY_ATTRIBUTES security_attributes, PHKEY result,
      LPDWORD disposition) {
    call_result_->reg_create_key_ex_called = true;
    call_result_->created_key = hkey;
    call_result_->created_key_path = sub_key;
    return ERROR_SUCCESS;
  }

  static LSTATUS WINAPI HookRegSetValueExW(
      HKEY key, LPCTSTR value_name, DWORD reserved, DWORD type,
      const BYTE *data, DWORD num_data) {
    call_result_->reg_set_value_ex_called = true;
    call_result_->written_value_name = value_name;
    call_result_->written_value =
        wstring(reinterpret_cast<const wchar_t*>(data));
    call_result_->written_type = type;
    return ERROR_SUCCESS;
  }

  static LSTATUS WINAPI HookRegCloseKey(HKEY key) {
    call_result_->reg_close_key_called = true;
    return ERROR_SUCCESS;
  }

  static CallResult *call_result_;
  static WinAPITestHelper::RestoreInfo *hook_restore_info_;
};

UpdateUtilTestWin::CallResult *UpdateUtilTestWin::call_result_ = nullptr;
WinAPITestHelper::RestoreInfo *UpdateUtilTestWin::hook_restore_info_ = nullptr;

// For official branding build on Windows
TEST_F(UpdateUtilTestWin, WriteActiveUsageInfo) {
#if defined(GOOGLE_JAPANESE_INPUT_BUILD)
  EXPECT_TRUE(UpdateUtil::WriteActiveUsageInfo());
  ASSERT_TRUE(call_result().reg_create_key_ex_called);
  EXPECT_EQ(HKEY_CURRENT_USER, call_result().created_key);
  EXPECT_EQ(L"Software\\Google\\Update\\ClientState"
            L"\\{DDCCD2A9-025E-4142-BCEB-F467B88CF830}",
            call_result().created_key_path);
  ASSERT_TRUE(call_result().reg_set_value_ex_called);
  EXPECT_EQ(L"dr", call_result().written_value_name);
  EXPECT_EQ(L"1", call_result().written_value);
  ASSERT_TRUE(call_result().reg_close_key_called);
#else
  EXPECT_FALSE(UpdateUtil::WriteActiveUsageInfo());
  ASSERT_FALSE(call_result().reg_create_key_ex_called);
  ASSERT_FALSE(call_result().reg_set_value_ex_called);
  ASSERT_FALSE(call_result().reg_close_key_called);
#endif
}

#else  // OS_WIN

// UpdateUtil::WriteActiveUsageInfo is not implemented except for Windows.
TEST(UpdateUtilTest, WriteActiveUsageInfo) {
  EXPECT_FALSE(UpdateUtil::WriteActiveUsageInfo());
}

#endif

}  // namespace
}  // namespace mozc