// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/browser/device_api/device_attribute_api.h"

#include "base/functional/callback.h"
#include "build/chromeos_buildflags.h"

#if BUILDFLAG(IS_CHROMEOS_ASH)
#include "chrome/browser/ash/policy/core/browser_policy_connector_ash.h"
#include "chrome/browser/ash/policy/handlers/device_name_policy_handler.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/browser_process_platform_part.h"
#include "chromeos/ash/components/system/statistics_provider.h"
#elif BUILDFLAG(IS_CHROMEOS_LACROS)
#include "chromeos/lacros/lacros_service.h"
#endif

using blink::mojom::DeviceAPIService;
using blink::mojom::DeviceAttributeResultPtr;

namespace device_attribute_api {

namespace {

using Result = blink::mojom::DeviceAttributeResult;

constexpr char kNotAffiliatedErrorMessage[] =
    "This web API is not allowed if the current profile is not affiliated.";

constexpr char kNotAllowedOriginErrorMessage[] =
    "The current origin cannot use this web API because it is not allowed by "
    "the DeviceAttributesAllowedForOrigins policy.";

#if !BUILDFLAG(IS_CHROMEOS)
const char kNotSupportedPlatformErrorMessage[] =
    "This web API is not supported on the current platform.";
#endif

#if BUILDFLAG(IS_CHROMEOS_LACROS)
void AdaptLacrosResult(
    DeviceAPIService::GetDirectoryIdCallback callback,
    crosapi::mojom::DeviceAttributesStringResultPtr lacros_result) {
  if (lacros_result->is_error_message()) {
    std::move(callback).Run(
        Result::NewErrorMessage(lacros_result->get_error_message()));
  } else if (lacros_result->get_contents().empty()) {
    std::move(callback).Run(Result::NewAttribute(std::optional<std::string>()));
  } else {
    std::move(callback).Run(
        Result::NewAttribute(lacros_result->get_contents()));
  }
}
#endif

}  // namespace

void ReportNotAffiliatedError(
    base::OnceCallback<void(DeviceAttributeResultPtr)> callback) {
  std::move(callback).Run(Result::NewErrorMessage(kNotAffiliatedErrorMessage));
}

void ReportNotAllowedError(
    base::OnceCallback<void(DeviceAttributeResultPtr)> callback) {
  std::move(callback).Run(
      Result::NewErrorMessage(kNotAllowedOriginErrorMessage));
}

void GetDirectoryId(DeviceAPIService::GetDirectoryIdCallback callback) {
#if BUILDFLAG(IS_CHROMEOS_ASH)
  const std::string attribute = g_browser_process->platform_part()
                                    ->browser_policy_connector_ash()
                                    ->GetDirectoryApiID();
  if (attribute.empty()) {
    std::move(callback).Run(Result::NewAttribute(std::optional<std::string>()));
  } else {
    std::move(callback).Run(Result::NewAttribute(attribute));
  }
#elif BUILDFLAG(IS_CHROMEOS_LACROS)
  // TODO(crbug.com/1328100): Replace with crosapi BrowserInitParams.
  chromeos::LacrosService::Get()
      ->GetRemote<crosapi::mojom::DeviceAttributes>()
      ->GetDirectoryDeviceId(
          base::BindOnce(AdaptLacrosResult, std::move(callback)));
#else  // Other platforms
  std::move(callback).Run(
      Result::NewErrorMessage(kNotSupportedPlatformErrorMessage));
#endif
}

void GetHostname(DeviceAPIService::GetHostnameCallback callback) {
#if BUILDFLAG(IS_CHROMEOS_ASH)
  const std::optional<std::string> attribute =
      g_browser_process->platform_part()
          ->browser_policy_connector_ash()
          ->GetDeviceNamePolicyHandler()
          ->GetHostnameChosenByAdministrator();
  std::move(callback).Run(Result::NewAttribute(attribute));
#elif BUILDFLAG(IS_CHROMEOS_LACROS)
  // TODO(crbug.com/1328100): Replace with crosapi BrowserInitParams.
  chromeos::LacrosService::Get()
      ->GetRemote<crosapi::mojom::DeviceAttributes>()
      ->GetDeviceHostname(
          base::BindOnce(AdaptLacrosResult, std::move(callback)));
#else  // Other platforms
  std::move(callback).Run(
      Result::NewErrorMessage(kNotSupportedPlatformErrorMessage));
#endif
}

void GetSerialNumber(DeviceAPIService::GetSerialNumberCallback callback) {
#if BUILDFLAG(IS_CHROMEOS_ASH)
  const std::optional<base::StringPiece> attribute =
      ash::system::StatisticsProvider::GetInstance()->GetMachineID();
  std::move(callback).Run(Result::NewAttribute(
      attribute ? std::optional<std::string>(attribute.value())
                : std::nullopt));

#elif BUILDFLAG(IS_CHROMEOS_LACROS)
  // TODO(crbug.com/1328100): Replace with crosapi BrowserInitParams.
  chromeos::LacrosService::Get()
      ->GetRemote<crosapi::mojom::DeviceAttributes>()
      ->GetDeviceSerialNumber(
          base::BindOnce(AdaptLacrosResult, std::move(callback)));
#else  // Other platforms
  std::move(callback).Run(
      Result::NewErrorMessage(kNotSupportedPlatformErrorMessage));
#endif
}

void GetAnnotatedAssetId(
    DeviceAPIService::GetAnnotatedAssetIdCallback callback) {
#if BUILDFLAG(IS_CHROMEOS_ASH)
  const std::string attribute = g_browser_process->platform_part()
                                    ->browser_policy_connector_ash()
                                    ->GetDeviceAssetID();
  if (attribute.empty()) {
    std::move(callback).Run(Result::NewAttribute(std::optional<std::string>()));
  } else {
    std::move(callback).Run(Result::NewAttribute(attribute));
  }
#elif BUILDFLAG(IS_CHROMEOS_LACROS)
  // TODO(crbug.com/1328100): Replace with crosapi BrowserInitParams.
  chromeos::LacrosService::Get()
      ->GetRemote<crosapi::mojom::DeviceAttributes>()
      ->GetDeviceAssetId(
          base::BindOnce(AdaptLacrosResult, std::move(callback)));
#else  // Other platforms
  std::move(callback).Run(
      Result::NewErrorMessage(kNotSupportedPlatformErrorMessage));
#endif
}

void GetAnnotatedLocation(
    DeviceAPIService::GetAnnotatedLocationCallback callback) {
#if BUILDFLAG(IS_CHROMEOS_ASH)
  const std::string attribute = g_browser_process->platform_part()
                                    ->browser_policy_connector_ash()
                                    ->GetDeviceAnnotatedLocation();
  if (attribute.empty()) {
    std::move(callback).Run(Result::NewAttribute(std::optional<std::string>()));
  } else {
    std::move(callback).Run(Result::NewAttribute(attribute));
  }
#elif BUILDFLAG(IS_CHROMEOS_LACROS)
  // TODO(crbug.com/1328100): Replace with crosapi BrowserInitParams.
  chromeos::LacrosService::Get()
      ->GetRemote<crosapi::mojom::DeviceAttributes>()
      ->GetDeviceAnnotatedLocation(
          base::BindOnce(AdaptLacrosResult, std::move(callback)));
#else  // Other platforms
  std::move(callback).Run(
      Result::NewErrorMessage(kNotSupportedPlatformErrorMessage));
#endif
}

}  // namespace device_attribute_api