// Copyright 2026 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/contextual_tasks/contextual_tasks_extension_handler.h"

#include <memory>
#include <variant>

#include "base/run_loop.h"
#include "base/test/bind.h"
#include "base/test/gmock_callback_support.h"
#include "base/test/scoped_feature_list.h"
#include "base/values.h"
#include "chrome/browser/contextual_search/contextual_search_web_contents_helper.h"
#include "chrome/browser/contextual_tasks/contextual_tasks_ui.h"
#include "chrome/browser/contextual_tasks/mock_contextual_tasks_page.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/webui/searchbox/searchbox_test_utils.h"
#include "chrome/common/webui_url_constants.h"
#include "chrome/test/base/in_process_browser_test.h"
#include "chrome/test/base/ui_test_utils.h"
#include "chrome/test/permissions/permission_request_manager_test_api.h"
#include "components/contextual_search/mock_contextual_search_context_controller.h"
#include "components/contextual_search/mock_contextual_search_session_handle.h"
#include "components/contextual_tasks/public/features.h"
#include "components/permissions/request_type.h"
#include "components/sessions/content/session_tab_helper.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_ui.h"
#include "content/public/test/browser_test.h"
#include "content/public/test/browser_test_utils.h"
#include "content/public/test/test_navigation_observer.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/omnibox_proto/chrome_aim_entry_point.pb.h"

namespace contextual_tasks {

using testing::_;
using testing::NiceMock;
using testing::Return;

class ContextualTasksExtensionHandlerBrowserTestBase
    : public InProcessBrowserTest {
 public:
  ContextualTasksExtensionHandlerBrowserTestBase(
      const std::vector<base::test::FeatureRef>& enabled_features,
      const std::vector<base::test::FeatureRef>& disabled_features) {
    feature_list_.InitWithFeatures(enabled_features, disabled_features);
  }
  ~ContextualTasksExtensionHandlerBrowserTestBase() override = default;

  void SetUpOnMainThread() override {
    InProcessBrowserTest::SetUpOnMainThread();

    web_contents_ = browser()->tab_strip_model()->GetActiveWebContents();
    content::RenderFrameHost* rfh = web_contents_->GetPrimaryMainFrame();

    ContextualTasksExtensionHandler::CreateForCurrentDocument(rfh);
    handler_ = ContextualTasksExtensionHandler::GetForCurrentDocument(rfh);
    ASSERT_NE(handler_, nullptr);

    // Bind the mock page to the handler.
    mojo::PendingReceiver<mojom::ExtensionPageHandler> page_handler_receiver;
    handler_->CreateExtensionPageHandler(mock_page_.BindAndGetRemote(),
                                         std::move(page_handler_receiver));

    // Bind the mock searchbox page to the handler.
    mojo::PendingReceiver<composebox::mojom::PageHandler> composebox_receiver;
    mojo::PendingReceiver<searchbox::mojom::PageHandler> searchbox_receiver;
    static_cast<composebox::mojom::PageHandlerFactory*>(handler_)
        ->CreatePageHandler(std::move(composebox_receiver),
                            mock_searchbox_page_.BindAndGetRemote(),
                            std::move(searchbox_receiver));

    // Set up mock session handle and controller.
    auto session_handle = std::make_unique<
        NiceMock<contextual_search::MockContextualSearchSessionHandle>>();
    mock_session_handle_ = session_handle.get();

    mock_controller_ = std::make_unique<
        NiceMock<contextual_search::MockContextualSearchContextController>>();

    ON_CALL(*mock_session_handle_, GetController())
        .WillByDefault(Return(mock_controller_.get()));

    lens::ClientToAimMessage non_empty_message;
    non_empty_message.mutable_submit_query();
    ON_CALL(*mock_controller_, CreateClientToAimRequest(_))
        .WillByDefault(Return(non_empty_message));

    // Set up file info for the active tab context.
    SessionID active_tab_id =
        sessions::SessionTabHelper::IdForTab(web_contents_);
    contextual_search::FileInfo file_info;
    file_info.tab_session_id = active_tab_id;
    lens::LensOverlayRequestId request_id;
    request_id.set_context_id(12345);
    file_info.request_id = request_id;
    std::vector<contextual_search::FileInfo> file_infos = {file_info};

    ON_CALL(*mock_session_handle_, GetUploadedContextFileInfos())
        .WillByDefault(Return(file_infos));

    ContextualSearchWebContentsHelper::GetOrCreateForWebContents(web_contents_)
        ->SetTaskSession(std::nullopt, std::move(session_handle),
                         /*input_state_model=*/nullptr);
  }

  void TearDownOnMainThread() override {
    handler_ = nullptr;
    mock_session_handle_ = nullptr;
    mock_controller_.reset();
    web_contents_ = nullptr;
    InProcessBrowserTest::TearDownOnMainThread();
  }

 protected:
  base::test::ScopedFeatureList feature_list_;
  raw_ptr<content::WebContents> web_contents_ = nullptr;
  raw_ptr<ContextualTasksExtensionHandler> handler_ = nullptr;
  NiceMock<MockContextualTasksExtensionPage> mock_page_;
  NiceMock<MockSearchboxPage> mock_searchbox_page_;
  raw_ptr<contextual_search::MockContextualSearchSessionHandle>
      mock_session_handle_ = nullptr;
  std::unique_ptr<contextual_search::MockContextualSearchContextController>
      mock_controller_;
};

class ContextualTasksExtensionHandlerBrowserTest
    : public ContextualTasksExtensionHandlerBrowserTestBase {
 public:
  ContextualTasksExtensionHandlerBrowserTest()
      : ContextualTasksExtensionHandlerBrowserTestBase(
            {kContextualTasks, kContextualTasksRearchitecture},
            {}) {}
};

IN_PROC_BROWSER_TEST_F(ContextualTasksExtensionHandlerBrowserTest,
                       SubmitQuery) {
  base::RunLoop run_loop;

  // We expect PostAimMessage to be called on the mock page.
  EXPECT_CALL(mock_page_, PostAimMessage(_))
      .WillOnce(base::test::RunClosure(run_loop.QuitClosure()));

  // Call SubmitQuery on the handler (which implements
  // searchbox::mojom::PageHandler). We cast it to make sure we are calling the
  // interface method.
  static_cast<searchbox::mojom::PageHandler*>(handler_)->SubmitQuery(
      "test query", 0, false, false, false, false, /*is_voice_search=*/false);

  run_loop.Run();
}

IN_PROC_BROWSER_TEST_F(ContextualTasksExtensionHandlerBrowserTest,
                       GetInputState) {
  base::RunLoop run_loop;

  static_cast<searchbox::mojom::PageHandler*>(handler_)->GetInputState(
      base::BindLambdaForTesting(
          [&](const std::optional<omnibox::InputState>& state) {
            // Since we are mocking the session, we expect a valid model to be
            // created and a default InputState to be returned (not nullopt).
            EXPECT_TRUE(state.has_value());
            run_loop.Quit();
          }));

  run_loop.Run();
}

IN_PROC_BROWSER_TEST_F(ContextualTasksExtensionHandlerBrowserTest,
                       OnPermissionPromptChangedPropagated) {
  test::PermissionRequestManagerTestApi test_api(browser());

  base::RunLoop show_run_loop;
  EXPECT_CALL(mock_searchbox_page_,
              OnPermissionPromptChanged(true, gfx::Size(0, 0)))
      .WillOnce(base::test::RunClosure(show_run_loop.QuitClosure()));

  test_api.AddSimpleRequest(web_contents_->GetPrimaryMainFrame(),
                            permissions::RequestType::kMultipleDownloads);
  show_run_loop.Run();

  base::RunLoop dismiss_run_loop;
  EXPECT_CALL(mock_searchbox_page_,
              OnPermissionPromptChanged(false, gfx::Size(0, 0)))
      .WillOnce(base::test::RunClosure(dismiss_run_loop.QuitClosure()));

  test_api.manager()->Dismiss(/*prompt_options=*/std::monostate());
  dismiss_run_loop.Run();
}

}  // namespace contextual_tasks