// Copyright 2023 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/ui/search_engine_choice/search_engine_choice_tab_helper.h"

#include "base/check_deref.h"
#include "chrome/browser/first_run/first_run.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/search_engine_choice/search_engine_choice_dialog_service.h"
#include "chrome/browser/search_engine_choice/search_engine_choice_dialog_service_factory.h"
#include "chrome/browser/search_engine_choice/search_engine_choice_service_factory.h"
#include "chrome/browser/ui/browser_window/public/browser_window_interface.h"
#include "chrome/browser/ui/browser_window/public/global_browser_collection.h"
#include "components/regional_capabilities/regional_capabilities_metrics.h"
#include "components/search_engines/search_engine_choice/search_engine_choice_service.h"
#include "components/search_engines/search_engine_choice/search_engine_choice_utils.h"
#include "content/public/browser/navigation_controller.h"
#include "content/public/browser/navigation_entry.h"
#include "content/public/browser/navigation_handle.h"
#include "content/public/browser/visibility.h"
#include "content/public/browser/web_contents.h"

#if BUILDFLAG(IS_CHROMEOS)
#include "chrome/browser/profiles/profiles_state.h"
#include "chromeos/components/kiosk/kiosk_utils.h"
#endif

SearchEngineChoiceTabHelper::~SearchEngineChoiceTabHelper() = default;

SearchEngineChoiceTabHelper::SearchEngineChoiceTabHelper(
    content::WebContents* web_contents)
    : WebContentsObserver(web_contents) {}

// static
bool SearchEngineChoiceTabHelper::IsHelperNeeded() {
  // TODO(crbug.com/347223092): Replace this with a check of availability of
  // `SearchEngineChoiceDialogService`. However we need to be mindful of how
  // this might affect metrics, see https://b/351778022.
  // We can't get a browser at this point, so checking the eligibility of the
  // browser itself is not possible now.

  return true;
}

void SearchEngineChoiceTabHelper::DidFinishNavigation(
    content::NavigationHandle* navigation_handle) {
  if (!navigation_handle) {
    return;
  }

  // Only valid top frame and committed navigations are considered.
  if (!navigation_handle->HasCommitted() ||
      !navigation_handle->IsInPrimaryMainFrame() ||
      navigation_handle->IsSameDocument()) {
    return;
  }

  MaybeShowDialog();
}

void SearchEngineChoiceTabHelper::OnVisibilityChanged(
    content::Visibility visibility) {
  MaybeShowDialog();
}

void SearchEngineChoiceTabHelper::MaybeShowDialog() {
  // Background tabs are not considered.
  if (web_contents()->GetVisibility() == content::Visibility::HIDDEN) {
    return;
  }

  content::NavigationController& navigation_controller =
      web_contents()->GetController();

  // Do not show if the page is still loading.
  if (navigation_controller.GetPendingEntry() != nullptr) {
    return;
  }

  BrowserWindowInterface* browser =
      GlobalBrowserCollection::GetInstance()->FindBrowserWithTab(
          web_contents());
  // The browser will be null if the web contents are rendered in devtools or
  // if the renderer crashes.
  if (!browser) {
    return;
  }

  SearchEngineChoiceDialogService* search_engine_choice_dialog_service =
      SearchEngineChoiceDialogServiceFactory::GetForProfile(
          browser->GetProfile());
  if (!search_engine_choice_dialog_service ||
      !search_engine_choice_dialog_service->IsUrlSuitableForDialog(
          navigation_controller.GetLastCommittedEntry()->GetURL())) {
    return;
  }

  regional_capabilities::SearchEngineChoiceScreenConditions conditions =
      search_engine_choice_dialog_service->ComputeDialogConditions(*browser);

  search_engines::SearchEngineChoiceService* search_engine_choice_service =
      search_engines::SearchEngineChoiceServiceFactory::GetForProfile(
          browser->GetProfile());
  search_engine_choice_service->RecordTriggeringEligibility(conditions);
  regional_capabilities::RecordDebugTriggeringEligibility(
      conditions, /*is_first_run=*/first_run::IsChromeFirstRun());

  if (!regional_capabilities::IsEligible(conditions)) {
    return;
  }

  SearchEngineChoiceDialog::Show(*browser);
}