// 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/ui/webui/chromeos/cryptohome_web_ui_handler.h"

#include "base/bind.h"
#include "base/values.h"
#include "chromeos/dbus/cryptohome_client.h"
#include "chromeos/dbus/dbus_thread_manager.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/web_ui.h"
#include "crypto/nss_util.h"

using content::BrowserThread;

namespace chromeos {

CryptohomeWebUIHandler::CryptohomeWebUIHandler() : weak_ptr_factory_(this) {}

CryptohomeWebUIHandler::~CryptohomeWebUIHandler() {}

void CryptohomeWebUIHandler::RegisterMessages() {
  web_ui()->RegisterMessageCallback(
      "pageLoaded",
      base::Bind(&CryptohomeWebUIHandler::OnPageLoaded,
                 weak_ptr_factory_.GetWeakPtr()));
}

void CryptohomeWebUIHandler::OnPageLoaded(const base::ListValue* args) {
  CryptohomeClient* cryptohome_client =
      DBusThreadManager::Get()->GetCryptohomeClient();

  cryptohome_client->IsMounted(GetCryptohomeBoolCallback("is-mounted"));
  cryptohome_client->TpmIsReady(GetCryptohomeBoolCallback("tpm-is-ready"));
  cryptohome_client->TpmIsEnabled(GetCryptohomeBoolCallback("tpm-is-enabled"));
  cryptohome_client->TpmIsOwned(GetCryptohomeBoolCallback("tpm-is-owned"));
  cryptohome_client->TpmIsBeingOwned(
      GetCryptohomeBoolCallback("tpm-is-being-owned"));
  cryptohome_client->Pkcs11IsTpmTokenReady(
      GetCryptohomeBoolCallback("pkcs11-is-tpm-token-ready"));

  BrowserThread::PostTaskAndReplyWithResult(
      BrowserThread::IO,
      FROM_HERE,
      base::Bind(&crypto::IsTPMTokenReady, base::Closure()),
      base::Bind(&CryptohomeWebUIHandler::DidGetNSSUtilInfoOnUIThread,
                 weak_ptr_factory_.GetWeakPtr()));
}

void CryptohomeWebUIHandler::DidGetNSSUtilInfoOnUIThread(
    bool is_tpm_token_ready) {
  DCHECK_CURRENTLY_ON(BrowserThread::UI);

  base::FundamentalValue is_tpm_token_ready_value(is_tpm_token_ready);
  SetCryptohomeProperty("is-tpm-token-ready", is_tpm_token_ready_value);
}

BoolDBusMethodCallback CryptohomeWebUIHandler::GetCryptohomeBoolCallback(
    const std::string& destination_id) {
  return base::Bind(&CryptohomeWebUIHandler::OnCryptohomeBoolProperty,
                    weak_ptr_factory_.GetWeakPtr(),
                    destination_id);
}

void CryptohomeWebUIHandler::OnCryptohomeBoolProperty(
    const std::string& destination_id,
    DBusMethodCallStatus call_status,
    bool value) {
  if (call_status != DBUS_METHOD_CALL_SUCCESS)
    value = false;
  base::FundamentalValue fundamental_value(value);
  SetCryptohomeProperty(destination_id, fundamental_value);
}

void CryptohomeWebUIHandler::SetCryptohomeProperty(
    const std::string& destination_id,
    const base::Value& value) {
  base::StringValue destination_id_value(destination_id);
  web_ui()->CallJavascriptFunction(
      "SetCryptohomeProperty", destination_id_value, value);
}

}  // namespace chromeos