// Copyright (c) 2012 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 "chrome/browser/chromeos/extensions/info_private_api.h"

#include "base/sys_info.h"
#include "base/values.h"
#include "chrome/browser/chromeos/login/startup_utils.h"
#include "chrome/browser/chromeos/login/user_manager.h"
#include "chrome/browser/chromeos/settings/cros_settings.h"
#include "chrome/browser/chromeos/system/timezone_util.h"
#include "chromeos/network/device_state.h"
#include "chromeos/network/network_handler.h"
#include "chromeos/network/network_state_handler.h"
#include "chromeos/network/shill_property_util.h"
#include "chromeos/settings/cros_settings_names.h"
#include "chromeos/system/statistics_provider.h"
#include "extensions/common/error_utils.h"
#include "third_party/cros_system_api/dbus/service_constants.h"

using chromeos::NetworkHandler;

namespace extensions {

namespace {

// Key which corresponds to the HWID setting.
const char kPropertyHWID[] = "hwid";

// Key which corresponds to the home provider property.
const char kPropertyHomeProvider[] = "homeProvider";

// Key which corresponds to the initial_locale property.
const char kPropertyInitialLocale[] = "initialLocale";

// Key which corresponds to the board property in JS.
const char kPropertyBoard[] = "board";

// Key which corresponds to the board property in JS.
const char kPropertyOwner[] = "isOwner";

// Key which corresponds to the timezone property in JS.
const char kPropertyTimezone[] = "timezone";

// Key which corresponds to the timezone property in JS.
const char kPropertySupportedTimezones[] = "supportedTimezones";

// Property not found error message.
const char kPropertyNotFound[] = "Property '*' does not exist.";

}  // namespace

ChromeosInfoPrivateGetFunction::ChromeosInfoPrivateGetFunction() {
}

ChromeosInfoPrivateGetFunction::~ChromeosInfoPrivateGetFunction() {
}

bool ChromeosInfoPrivateGetFunction::RunImpl() {
  ListValue* list = NULL;
  EXTENSION_FUNCTION_VALIDATE(args_->GetList(0, &list));
  scoped_ptr<DictionaryValue> result(new DictionaryValue());
  for (size_t i = 0; i < list->GetSize(); ++i) {
    std::string property_name;
    EXTENSION_FUNCTION_VALIDATE(list->GetString(i, &property_name));
    Value* value = GetValue(property_name);
    if (value)
      result->Set(property_name, value);
  }
  SetResult(result.release());
  SendResponse(true);
  return true;
}

base::Value* ChromeosInfoPrivateGetFunction::GetValue(
    const std::string& property_name) {
  if (property_name == kPropertyHWID) {
    std::string hwid;
    chromeos::system::StatisticsProvider* provider =
        chromeos::system::StatisticsProvider::GetInstance();
    provider->GetMachineStatistic(chromeos::system::kHardwareClassKey, &hwid);
    return new base::StringValue(hwid);
  } else if (property_name == kPropertyHomeProvider) {
    const chromeos::DeviceState* cellular_device =
        NetworkHandler::Get()->network_state_handler()->GetDeviceStateByType(
            chromeos::NetworkTypePattern::Cellular());
    std::string home_provider_id;
    if (cellular_device)
      home_provider_id = cellular_device->home_provider_id();
    return new base::StringValue(home_provider_id);
  } else if (property_name == kPropertyInitialLocale) {
    return new base::StringValue(
        chromeos::StartupUtils::GetInitialLocale());
  } else if (property_name == kPropertyBoard) {
    return new base::StringValue(base::SysInfo::GetLsbReleaseBoard());
  } else if (property_name == kPropertyOwner) {
    return Value::CreateBooleanValue(
        chromeos::UserManager::Get()->IsCurrentUserOwner());
  } else if (property_name == kPropertyTimezone) {
    return chromeos::CrosSettings::Get()->GetPref(
            chromeos::kSystemTimezone)->DeepCopy();
  } else if (property_name == kPropertySupportedTimezones) {
    scoped_ptr<base::ListValue> values = chromeos::system::GetTimezoneList();
    return values.release();
  }

  DLOG(ERROR) << "Unknown property request: " << property_name;
  return NULL;
}


ChromeosInfoPrivateSetFunction::ChromeosInfoPrivateSetFunction() {
}

ChromeosInfoPrivateSetFunction::~ChromeosInfoPrivateSetFunction() {
}

bool ChromeosInfoPrivateSetFunction::RunImpl() {
  std::string param_name;
  EXTENSION_FUNCTION_VALIDATE(args_->GetString(0, &param_name));
  if (param_name == kPropertyTimezone) {
    std::string param_value;
    EXTENSION_FUNCTION_VALIDATE(args_->GetString(1, &param_value));
    chromeos::CrosSettings::Get()->Set(chromeos::kSystemTimezone,
                                       base::StringValue(param_value));
  } else {
    error_ = ErrorUtils::FormatErrorMessage(kPropertyNotFound, param_name);
    return false;
  }

  return true;
}

}  // namespace extensions