// Copyright 2024 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/autofill/autofill_field_promo_controller_impl.h"

#include "base/functional/bind.h"
#include "base/memory/weak_ptr.h"
#include "base/task/single_thread_task_runner.h"
#include "chrome/browser/ui/autofill/autofill_field_promo_view.h"
#include "chrome/browser/ui/browser_window.h"
#include "chrome/browser/ui/user_education/browser_user_education_interface.h"
#include "components/autofill/content/browser/content_autofill_driver.h"
#include "components/autofill/core/browser/integrators/autofill_ai/metrics/autofill_ai_metrics.h"
#include "components/autofill/core/browser/suggestions/suggestion_hiding_reason.h"
#include "components/feature_engagement/public/feature_constants.h"
#include "components/password_manager/content/browser/content_password_manager_driver.h"
#include "content/public/browser/web_contents.h"
#include "ui/gfx/geometry/rect_f.h"

namespace autofill {

AutofillFieldPromoControllerImpl::AutofillFieldPromoControllerImpl(
    content::WebContents* web_contents,
    const base::Feature& feature_promo,
    ui::ElementIdentifier promo_element_identifier)
    : web_contents_(web_contents),
      feature_promo_(feature_promo),
      promo_element_identifier_(std::move(promo_element_identifier)) {}

AutofillFieldPromoControllerImpl::~AutofillFieldPromoControllerImpl() {
  Hide();
}

void AutofillFieldPromoControllerImpl::Show(const gfx::RectF& bounds) {
  Hide();

  content::RenderFrameHost* rfh = web_contents_->GetFocusedFrame();
  if (!rfh) {
    return;
  }

  auto* const interface =
      BrowserUserEducationInterface::MaybeGetForWebContentsInTab(web_contents_);
  if (!interface) {
    return;
  }

  // The IPH has an 'x' button to dismiss it. If the user education code
  // registers a click on the 'x' button, the IPH is never shown again.
  // However, clicking on the IPH (including on the 'x' button) also triggers
  // `WebContents` focus loss. If `AutofillPopupHideHelper` hid the IPH on
  // `WebContents` focus loss, the click on the 'x' button would not be
  // registered by the user education code and the IPH might be shown again.
  AutofillPopupHideHelper::HidingParams hiding_params = {
      .hide_on_web_contents_lost_focus = false};
  AutofillPopupHideHelper::HidingCallback hiding_callback =
      base::BindRepeating([](AutofillFieldPromoControllerImpl& controller,
                             SuggestionHidingReason) { controller.Hide(); },
                          std::ref(*this));
  AutofillPopupHideHelper::PictureInPictureDetectionCallback
      pip_detection_callback = base::BindRepeating(
          [](AutofillFieldPromoControllerImpl& controller) {
            return controller.promo_view_ &&
                   controller.promo_view_->OverlapsWithPictureInPictureWindow();
          },
          std::ref(*this));
  promo_hide_helper_.emplace(
      web_contents_, rfh->GetGlobalId(), std::move(hiding_params),
      std::move(hiding_callback), std::move(pip_detection_callback));
  promo_view_ = AutofillFieldPromoView::CreateAndShow(
      web_contents_, bounds, promo_element_identifier_);

  user_education::FeaturePromoParams params(feature_promo_.get());
  params.show_promo_result_callback =
      base::BindOnce(&AutofillFieldPromoControllerImpl::OnShowPromoResult,
                     weak_ptr_factory_.GetWeakPtr());
  is_maybe_showing_ = interface->MaybeShowFeaturePromo(std::move(params));
}

void AutofillFieldPromoControllerImpl::Hide() {
  is_maybe_showing_ = false;
  promo_hide_helper_.reset();
  if (promo_view_) {
    // First, make the promo view invisible. Then, post a task to close it
    // (which effectively destroys it). This ensures that parent bounds are
    // recalculated before the view is destroyed, preventing a nullptr
    // dereference.
    promo_view_->MakeInvisible();
    base::WeakPtr<AutofillFieldPromoView> view_to_close =
        std::exchange(promo_view_, nullptr);
    base::SingleThreadTaskRunner::GetCurrentDefault()->PostTask(
        FROM_HERE, base::BindOnce(
                       [](base::WeakPtr<AutofillFieldPromoView> promo_view) {
                         if (promo_view) {
                           promo_view->Close();
                         }
                       },
                       view_to_close->GetWeakPtr()));
  }
}

void AutofillFieldPromoControllerImpl::OnShowPromoResult(
    user_education::FeaturePromoResult result) {
  // On failure to show, hide the invisible view.
  if (!result) {
    Hide();
  } else if (feature_promo_ == feature_engagement::kIPHAutofillAiOptInFeature) {
    LogOptInFunnelEvent(AutofillAiOptInFunnelEvents::kIphShown);
  }
}

const base::Feature& AutofillFieldPromoControllerImpl::GetFeaturePromo() const {
  return feature_promo_.get();
}

bool AutofillFieldPromoControllerImpl::IsMaybeShowing() const {
  return is_maybe_showing_;
}

}  // namespace autofill