// Copyright (c) 2011 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/login/registration_screen.h"

#include "base/logging.h"
#include "base/string_util.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/chromeos/input_method/input_method_util.h"
#include "chrome/browser/profiles/profile_manager.h"
#include "chrome/common/url_constants.h"
#include "content/browser/child_process_security_policy.h"
#include "content/browser/renderer_host/render_view_host.h"
#include "content/browser/site_instance.h"
#include "content/browser/tab_contents/tab_contents.h"
#include "googleurl/src/gurl.h"
#include "net/url_request/url_request_about_job.h"
#include "net/url_request/url_request_filter.h"
#include "views/widget/widget_gtk.h"

namespace chromeos {

namespace {

const char kRegistrationHostPageUrl[] = "chrome://register/";

// "Hostname" that is used for redirects from host registration page.
const char kRegistrationHostnameUrl[] = "register";

// Host page navigates to these URLs in case of success/skipped registration.
const char kRegistrationSuccessUrl[] = "cros://register/success";
const char kRegistrationSkippedUrl[] = "cros://register/skipped";

}  // namespace

///////////////////////////////////////////////////////////////////////////////
// RegistrationScreen, public:
RegistrationScreen::RegistrationScreen(WizardScreenDelegate* delegate)
    : ViewScreen<RegistrationView>(delegate) {
  if (!host_page_url_.get())
    set_registration_host_page_url(GURL(kRegistrationHostPageUrl));

  ChildProcessSecurityPolicy::GetInstance()->RegisterWebSafeScheme(
      chrome::kCrosScheme);
  net::URLRequestFilter::GetInstance()->AddHostnameHandler(
      chrome::kCrosScheme,
      kRegistrationHostnameUrl,
      &RegistrationScreen::Factory);
}

// static
void RegistrationScreen::set_registration_host_page_url(const GURL& url) {
  host_page_url_.reset(new GURL(url));
}

// static
scoped_ptr<GURL> RegistrationScreen::host_page_url_;

///////////////////////////////////////////////////////////////////////////////
// RegistrationScreen, ViewScreen implementation:
void RegistrationScreen::CreateView() {
  ViewScreen<RegistrationView>::CreateView();
  view()->SetWebPageDelegate(this);
}

void RegistrationScreen::Refresh() {
  StartTimeoutTimer();
  GURL url(*host_page_url_);
  Profile* profile = ProfileManager::GetDefaultProfile();
  view()->InitDOM(profile,
                  SiteInstance::CreateSiteInstanceForURL(profile, url));
  view()->SetTabContentsDelegate(this);
  view()->LoadURL(url);
}

RegistrationView* RegistrationScreen::AllocateView() {
  return new RegistrationView();
}

///////////////////////////////////////////////////////////////////////////////
// RegistrationScreen, WebPageDelegate implementation:
void RegistrationScreen::OnPageLoaded() {
  StopTimeoutTimer();
  // Enable input methods (e.g. Chinese, Japanese) so that users could input
  // their first and last names.
  if (g_browser_process) {
    const std::string locale = g_browser_process->GetApplicationLocale();
    input_method::EnableInputMethods(
        locale, input_method::kAllInputMethods, "");
  }
  view()->ShowPageContent();
}

void RegistrationScreen::OnPageLoadFailed(const std::string& url) {
  LOG(ERROR) << "Error loading registration page: " << url;
  CloseScreen(ScreenObserver::REGISTRATION_SKIPPED);
}

///////////////////////////////////////////////////////////////////////////////
// RegistrationScreen, TabContentsDelegate implementation:
 void RegistrationScreen::OpenURLFromTab(TabContents* source,
                                         const GURL& url,
                                         const GURL& referrer,
                                         WindowOpenDisposition disposition,
                                         PageTransition::Type transition) {
  if (url.spec() == kRegistrationSuccessUrl) {
    source->Stop();
    VLOG(1) << "Registration form completed.";
    CloseScreen(ScreenObserver::REGISTRATION_SUCCESS);
  } else if (url.spec() == kRegistrationSkippedUrl) {
    source->Stop();
    VLOG(1) << "Registration form skipped.";
    CloseScreen(ScreenObserver::REGISTRATION_SKIPPED);
  } else {
    source->Stop();
    // Host registration page and actual registration page hosted by
    // OEM partner doesn't contain links to external URLs.
    LOG(WARNING) << "Navigate to unsupported url: " << url.spec();
  }
}

void RegistrationScreen::HandleKeyboardEvent(
    const NativeWebKeyboardEvent& event) {
  views::Widget* widget = view()->GetWidget();
  if (widget && event.os_event && !event.skip_in_browser) {
    views::KeyEvent views_event(reinterpret_cast<GdkEvent*>(event.os_event));
    static_cast<views::WidgetGtk*>(widget)->HandleKeyboardEvent(views_event);
  }
}

///////////////////////////////////////////////////////////////////////////////
// RegistrationScreen, private:
void RegistrationScreen::CloseScreen(ScreenObserver::ExitCodes code) {
  StopTimeoutTimer();
  // Disable input methods since they are not necessary to input username and
  // password.
  if (g_browser_process) {
    const std::string locale = g_browser_process->GetApplicationLocale();
    input_method::EnableInputMethods(
        locale, input_method::kKeyboardLayoutsOnly, "");
  }
  delegate()->GetObserver(this)->OnExit(code);
}

// static
net::URLRequestJob* RegistrationScreen::Factory(net::URLRequest* request,
                                                const std::string& scheme) {
  VLOG(1) << "Handling url: " << request->url().spec().c_str();
  return new net::URLRequestAboutJob(request);
}

}  // namespace chromeos