/*
 * Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>
 * Copyright (c) 2021, Maciej Zygmanowski <sppmacd@pm.me>
 * Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
 * Copyright (c) 2022, the SerenityOS developers.
 * Copyright (c) 2022, networkException <networkexception@serenityos.org>
 * Copyright (c) 2023, Cameron Youell <cameronyouell@gmail.com>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include "Tab.h"
#include "BookmarksBarWidget.h"
#include "Browser.h"
#include "BrowserWindow.h"
#include "DownloadWidget.h"
#include "History/HistoryWidget.h"
#include "InspectorWidget.h"
#include "StorageWidget.h"
#include <AK/StringBuilder.h>
#include <Applications/Browser/TabGML.h>
#include <Applications/Browser/URLBox.h>
#include <Applications/BrowserSettings/Defaults.h>
#include <LibConfig/Client.h>
#include <LibCore/MimeData.h>
#include <LibDesktop/Launcher.h>
#include <LibGUI/Action.h>
#include <LibGUI/Application.h>
#include <LibGUI/BoxLayout.h>
#include <LibGUI/Button.h>
#include <LibGUI/Clipboard.h>
#include <LibGUI/ColorPicker.h>
#include <LibGUI/Dialog.h>
#include <LibGUI/FilePicker.h>
#include <LibGUI/FileTypeFilter.h>
#include <LibGUI/InputBox.h>
#include <LibGUI/Menu.h>
#include <LibGUI/MessageBox.h>
#include <LibGUI/Statusbar.h>
#include <LibGUI/TextBox.h>
#include <LibGUI/Toolbar.h>
#include <LibGUI/ToolbarContainer.h>
#include <LibGUI/Window.h>
#include <LibURL/URL.h>
#include <LibWeb/HTML/BrowsingContext.h>
#include <LibWeb/HTML/HistoryHandlingBehavior.h>
#include <LibWeb/HTML/SelectedFile.h>
#include <LibWeb/HTML/SyntaxHighlighter/SyntaxHighlighter.h>
#include <LibWeb/Layout/BlockContainer.h>
#include <LibWeb/Layout/Viewport.h>
#include <LibWeb/Loader/ResourceLoader.h>
#include <LibWebView/OutOfProcessWebView.h>
#include <LibWebView/SearchEngine.h>
#include <LibWebView/URL.h>

namespace Browser {

Tab::~Tab()
{
    close_sub_widgets();
}

void Tab::start_download(const URL::URL& url)
{
    auto window = GUI::Window::construct(&this->window());
    window->resize(300, 170);
    window->set_title(ByteString::formatted("0% of {}", url.basename()));
    window->set_resizable(false);
    (void)window->set_main_widget<DownloadWidget>(url);
    window->show();
}

void Tab::view_source(const URL::URL& url, ByteString const& source)
{
    auto window = GUI::Window::construct(&this->window());
    auto editor = window->set_main_widget<GUI::TextEditor>();
    editor->set_text(source);
    editor->set_mode(GUI::TextEditor::ReadOnly);
    editor->set_syntax_highlighter(make<Web::HTML::SyntaxHighlighter>());
    editor->set_ruler_visible(true);
    editor->set_visualize_trailing_whitespace(false);
    window->resize(640, 480);
    window->set_title(url.to_byte_string());
    window->set_icon(g_icon_bag.filetype_text);
    window->set_window_mode(GUI::WindowMode::Modeless);
    window->show();
}

void Tab::update_status(Optional<String> text_override, i32 count_waiting)
{
    if (text_override.has_value()) {
        m_statusbar->set_text(*text_override);
        return;
    }

    if (m_loaded) {
        m_statusbar->set_text({});
        return;
    }

    VERIFY(m_navigating_url.has_value());

    if (count_waiting == 0) {
        // ex: "Loading google.com"
        m_statusbar->set_text(String::formatted("Loading {}", m_navigating_url->serialized_host().release_value_but_fixme_should_propagate_errors()).release_value_but_fixme_should_propagate_errors());
    } else {
        // ex: "google.com is waiting on 5 resources"
        m_statusbar->set_text(String::formatted("{} is waiting on {} resource{}", m_navigating_url->serialized_host().release_value_but_fixme_should_propagate_errors(), count_waiting, count_waiting == 1 ? ""sv : "s"sv).release_value_but_fixme_should_propagate_errors());
    }
}

Tab::Tab(BrowserWindow& window)
{
    load_from_gml(tab_gml).release_value_but_fixme_should_propagate_errors();

    m_icon = g_icon_bag.default_favicon;

    m_toolbar_container = *find_descendant_of_type_named<GUI::ToolbarContainer>("toolbar_container");
    auto& toolbar = *find_descendant_of_type_named<GUI::Toolbar>("toolbar");

    auto& webview_container = *find_descendant_of_type_named<GUI::Widget>("webview_container");

    m_web_content_view = webview_container.add<WebView::OutOfProcessWebView>();

    auto preferred_color_scheme = Web::CSS::preferred_color_scheme_from_string(Config::read_string("Browser"sv, "Preferences"sv, "ColorScheme"sv, Browser::default_color_scheme));
    m_web_content_view->set_preferred_color_scheme(preferred_color_scheme);

    content_filters_changed();
    autoplay_allowlist_changed();

    m_web_content_view->set_proxy_mappings(g_proxies, g_proxy_mappings);
    if (!g_webdriver_content_ipc_path.is_empty())
        enable_webdriver_mode();

    auto& go_back_button = toolbar.add_action(window.go_back_action());
    go_back_button.on_context_menu_request = [&](auto&) {
        if (!m_history.can_go_back())
            return;
        int i = 0;
        m_go_back_context_menu = GUI::Menu::construct();
        for (auto& url : m_history.get_back_title_history()) {
            i++;
            m_go_back_context_menu->add_action(GUI::Action::create(url.to_byte_string(), g_icon_bag.filetype_html, [this, i](auto&) { go_back(i); }));
        }
        m_go_back_context_menu->popup(go_back_button.screen_relative_rect().bottom_left().moved_up(1));
    };

    auto& go_forward_button = toolbar.add_action(window.go_forward_action());
    go_forward_button.on_context_menu_request = [&](auto&) {
        if (!m_history.can_go_forward())
            return;
        int i = 0;
        m_go_forward_context_menu = GUI::Menu::construct();
        for (auto& url : m_history.get_forward_title_history()) {
            i++;
            m_go_forward_context_menu->add_action(GUI::Action::create(url.to_byte_string(), g_icon_bag.filetype_html, [this, i](auto&) { go_forward(i); }));
        }
        m_go_forward_context_menu->popup(go_forward_button.screen_relative_rect().bottom_left().moved_up(1));
    };

    auto& go_home_button = toolbar.add_action(window.go_home_action());
    go_home_button.set_allowed_mouse_buttons_for_pressing(GUI::MouseButton::Primary | GUI::MouseButton::Middle);
    go_home_button.on_middle_mouse_click = [&](auto) {
        on_tab_open_request(g_home_url);
    };

    toolbar.add_action(window.reload_action());

    m_location_box = toolbar.add<URLBox>();
    m_location_box->set_placeholder("Search or enter address"sv);

    m_location_box->on_return_pressed = [this] {
        if (auto url = WebView::sanitize_url(m_location_box->text(), g_search_engine, WebView::AppendTLD::No); url.has_value())
            load(*url);
    };

    m_location_box->on_ctrl_return_pressed = [this] {
        if (auto url = WebView::sanitize_url(m_location_box->text(), g_search_engine, WebView::AppendTLD::Yes); url.has_value())
            load(*url);
    };

    m_location_box->add_custom_context_menu_action(GUI::Action::create("Paste && Go", [this](auto&) {
        auto [data, mime_type, _] = GUI::Clipboard::the().fetch_data_and_type();
        if (!mime_type.starts_with("text/"sv))
            return;
        auto const& paste_text = data;
        if (paste_text.is_empty())
            return;
        m_location_box->set_text(paste_text);
        m_location_box->on_return_pressed();
    }));

    auto bookmark_action = GUI::Action::create(
        "Bookmark current URL", { Mod_Ctrl, Key_D }, [this](auto&) {
            if (auto result = bookmark_current_url(); result.is_error())
                GUI::MessageBox::show_error(this->window().main_widget()->window(), MUST(String::formatted("Failed to bookmark URL: {}", result.error())));
        },
        this);

    m_reset_zoom_button = toolbar.add<GUI::Button>();
    m_reset_zoom_button->set_tooltip("Reset zoom level"_string);
    m_reset_zoom_button->on_click = [&](auto) {
        view().reset_zoom();
        update_reset_zoom_button();
        window.update_zoom_menu();
    };
    m_reset_zoom_button->set_button_style(Gfx::ButtonStyle::Coolbar);
    m_reset_zoom_button->set_visible(false);
    m_reset_zoom_button->set_preferred_width(GUI::SpecialDimension::Shrink);

    m_bookmark_button = toolbar.add<GUI::Button>();
    m_bookmark_button->set_action(bookmark_action);
    m_bookmark_button->set_button_style(Gfx::ButtonStyle::Coolbar);
    m_bookmark_button->set_focus_policy(GUI::FocusPolicy::TabFocus);
    m_bookmark_button->set_icon(g_icon_bag.bookmark_contour);
    m_bookmark_button->set_fixed_size(22, 22);

    view().on_load_start = [this](auto& url, bool is_redirect) {
        m_navigating_url = url;
        m_loaded = false;

        // If we are loading due to a redirect, we replace the current history entry
        // with the loaded URL
        if (is_redirect) {
            m_history.replace_current(url, title());
        }

        auto url_serialized = url.serialize();

        m_title = url_serialized;
        if (on_title_change)
            on_title_change(m_title);

        m_icon = g_icon_bag.default_favicon;
        if (on_favicon_change)
            on_favicon_change(*m_icon);

        update_status();

        m_location_box->set_icon(nullptr);
        m_location_box->set_text(url_serialized);

        // don't add to history if back or forward is pressed
        if (!m_is_history_navigation)
            m_history.push(url, title());
        m_is_history_navigation = false;

        update_actions();
        update_bookmark_button(url_serialized);

        if (m_dom_inspector_widget)
            m_dom_inspector_widget->reset();
    };

    view().on_load_finish = [this](auto&) {
        m_navigating_url = {};
        m_loaded = true;

        update_status();

        if (m_dom_inspector_widget)
            m_dom_inspector_widget->inspect();
    };

    view().on_url_updated = [this](auto const& url, auto history_behavior) {
        switch (history_behavior) {
        case Web::HTML::HistoryHandlingBehavior::Push:
            m_history.push(url, m_title);
            break;
        case Web::HTML::HistoryHandlingBehavior::Replace:
            m_history.replace_current(url, m_title);
            break;
        }

        auto url_serialized = url.serialize();
        m_location_box->set_text(url_serialized);

        update_actions();
        update_bookmark_button(url_serialized);
    };

    view().on_navigate_back = [this]() {
        go_back(1);
    };

    view().on_navigate_forward = [this]() {
        go_forward(1);
    };

    view().on_refresh = [this]() {
        reload();
    };

    view().on_link_click = [this](auto& url, auto& target, unsigned modifiers) {
        if (target == "_blank" || modifiers == Mod_Ctrl) {
            on_tab_open_request(url);
        } else {
            load(url);
        }
    };

    view().on_resource_status_change = [this](auto count_waiting) {
        update_status({}, count_waiting);
    };

    view().on_restore_window = [this]() {
        this->window().show();
        this->window().move_to_front();
        m_web_content_view->set_system_visibility_state(true);
    };

    view().on_reposition_window = [this](Gfx::IntPoint position) {
        this->window().move_to(position);
        return this->window().position();
    };

    view().on_resize_window = [this](Gfx::IntSize size) {
        this->window().resize(size);
        return this->window().size();
    };

    view().on_maximize_window = [this]() {
        this->window().set_maximized(true);
        return this->window().rect();
    };

    view().on_minimize_window = [this]() {
        this->window().set_minimized(true);
        m_web_content_view->set_system_visibility_state(false);
        return this->window().rect();
    };

    view().on_fullscreen_window = [this]() {
        this->window().set_fullscreen(true);
        return this->window().rect();
    };

    m_link_context_menu = GUI::Menu::construct();
    auto link_default_action = GUI::Action::create("&Open", g_icon_bag.go_to, [this](auto&) {
        view().on_link_click(m_link_context_menu_url, "", 0);
    });
    m_link_context_menu->add_action(link_default_action);
    m_link_context_menu_default_action = link_default_action;
    m_link_context_menu->add_action(GUI::Action::create("Open in New &Tab", g_icon_bag.new_tab, [this](auto&) {
        view().on_link_click(m_link_context_menu_url, "_blank", 0);
    }));
    m_link_context_menu->add_separator();
    m_link_copy_action = GUI::Action::create("Copy &URL", g_icon_bag.copy, [this](auto&) {
        GUI::Clipboard::the().set_plain_text(WebView::url_text_to_copy(m_link_context_menu_url));
    });
    m_link_context_menu->add_action(*m_link_copy_action);
    m_link_context_menu->add_separator();
    m_link_context_menu->add_action(GUI::Action::create("&Download", g_icon_bag.download, [this](auto&) {
        start_download(m_link_context_menu_url);
    }));
    m_link_context_menu->add_separator();
    m_link_context_menu->add_action(window.inspect_dom_node_action());

    view().on_link_context_menu_request = [this](auto& url, auto widget_position) {
        m_link_context_menu_url = url;

        switch (WebView::url_type(url)) {
        case WebView::URLType::Email:
            m_link_copy_action->set_text("Copy &Email Address");
            break;
        case WebView::URLType::Telephone:
            m_link_copy_action->set_text("Copy &Phone Number");
            break;
        case WebView::URLType::Other:
            m_link_copy_action->set_text("Copy &URL");
            break;
        }

        auto screen_position = view().screen_relative_rect().location().translated(widget_position);
        m_link_context_menu->popup(screen_position, m_link_context_menu_default_action);
    };

    m_image_context_menu = GUI::Menu::construct();
    m_image_context_menu->add_action(GUI::Action::create("&Open Image", g_icon_bag.filetype_image, [this](auto&) {
        view().on_link_click(m_image_context_menu_url, "", 0);
    }));
    m_image_context_menu->add_action(GUI::Action::create("Open Image in New &Tab", g_icon_bag.new_tab, [this](auto&) {
        view().on_link_click(m_image_context_menu_url, "_blank", 0);
    }));
    m_image_context_menu->add_separator();
    m_image_context_menu->add_action(GUI::Action::create("&Copy Image", g_icon_bag.copy, [this](auto&) {
        if (m_image_context_menu_bitmap.is_valid())
            GUI::Clipboard::the().set_bitmap(*m_image_context_menu_bitmap.bitmap());
    }));
    m_image_context_menu->add_action(GUI::Action::create("Copy Image &URL", g_icon_bag.copy, [this](auto&) {
        GUI::Clipboard::the().set_plain_text(m_image_context_menu_url.to_byte_string());
    }));
    m_image_context_menu->add_separator();
    m_image_context_menu->add_action(GUI::Action::create("&Download", g_icon_bag.download, [this](auto&) {
        start_download(m_image_context_menu_url);
    }));
    m_image_context_menu->add_separator();
    m_image_context_menu->add_action(window.inspect_dom_node_action());

    view().on_image_context_menu_request = [this](auto& image_url, auto widget_position, Gfx::ShareableBitmap const& shareable_bitmap) {
        m_image_context_menu_url = image_url;
        m_image_context_menu_bitmap = shareable_bitmap;

        auto screen_position = view().screen_relative_rect().location().translated(widget_position);
        m_image_context_menu->popup(screen_position);
    };

    m_media_context_menu_play_pause_action = GUI::Action::create("&Play", g_icon_bag.play, [this](auto&) {
        view().toggle_media_play_state();
    });
    m_media_context_menu_mute_unmute_action = GUI::Action::create("&Mute", g_icon_bag.mute, [this](auto&) {
        view().toggle_media_mute_state();
    });
    m_media_context_menu_controls_action = GUI::Action::create_checkable("Show &Controls", [this](auto&) {
        view().toggle_media_controls_state();
    });
    m_media_context_menu_loop_action = GUI::Action::create_checkable("&Loop", [this](auto&) {
        view().toggle_media_loop_state();
    });

    m_audio_context_menu = GUI::Menu::construct();
    m_audio_context_menu->add_action(*m_media_context_menu_play_pause_action);
    m_audio_context_menu->add_action(*m_media_context_menu_mute_unmute_action);
    m_audio_context_menu->add_action(*m_media_context_menu_controls_action);
    m_audio_context_menu->add_action(*m_media_context_menu_loop_action);
    m_audio_context_menu->add_separator();
    m_audio_context_menu->add_action(GUI::Action::create("&Open Audio", g_icon_bag.filetype_audio, [this](auto&) {
        view().on_link_click(m_media_context_menu_url, "", 0);
    }));
    m_audio_context_menu->add_action(GUI::Action::create("Open Audio in New &Tab", g_icon_bag.new_tab, [this](auto&) {
        view().on_link_click(m_media_context_menu_url, "_blank", 0);
    }));
    m_audio_context_menu->add_separator();
    m_audio_context_menu->add_action(GUI::Action::create("Copy Audio &URL", g_icon_bag.copy, [this](auto&) {
        GUI::Clipboard::the().set_plain_text(m_media_context_menu_url.to_byte_string());
    }));
    m_audio_context_menu->add_separator();
    m_audio_context_menu->add_action(GUI::Action::create("&Download", g_icon_bag.download, [this](auto&) {
        start_download(m_media_context_menu_url);
    }));
    m_audio_context_menu->add_separator();
    m_audio_context_menu->add_action(window.inspect_dom_node_action());

    m_video_context_menu = GUI::Menu::construct();
    m_video_context_menu->add_action(*m_media_context_menu_play_pause_action);
    m_video_context_menu->add_action(*m_media_context_menu_mute_unmute_action);
    m_video_context_menu->add_action(*m_media_context_menu_controls_action);
    m_video_context_menu->add_action(*m_media_context_menu_loop_action);
    m_video_context_menu->add_separator();
    m_video_context_menu->add_action(GUI::Action::create("&Open Video", g_icon_bag.filetype_video, [this](auto&) {
        view().on_link_click(m_media_context_menu_url, "", 0);
    }));
    m_video_context_menu->add_action(GUI::Action::create("Open Video in New &Tab", g_icon_bag.new_tab, [this](auto&) {
        view().on_link_click(m_media_context_menu_url, "_blank", 0);
    }));
    m_video_context_menu->add_separator();
    m_video_context_menu->add_action(GUI::Action::create("Copy Video &URL", g_icon_bag.copy, [this](auto&) {
        GUI::Clipboard::the().set_plain_text(m_media_context_menu_url.to_byte_string());
    }));
    m_video_context_menu->add_separator();
    m_video_context_menu->add_action(GUI::Action::create("&Download", g_icon_bag.download, [this](auto&) {
        start_download(m_media_context_menu_url);
    }));
    m_video_context_menu->add_separator();
    m_video_context_menu->add_action(window.inspect_dom_node_action());

    view().on_media_context_menu_request = [this](auto widget_position, Web::Page::MediaContextMenu const& menu) {
        m_media_context_menu_url = menu.media_url;

        if (menu.is_playing) {
            m_media_context_menu_play_pause_action->set_icon(g_icon_bag.pause);
            m_media_context_menu_play_pause_action->set_text("&Pause"sv);
        } else {
            m_media_context_menu_play_pause_action->set_icon(g_icon_bag.play);
            m_media_context_menu_play_pause_action->set_text("&Play"sv);
        }

        if (menu.is_muted) {
            m_media_context_menu_mute_unmute_action->set_icon(g_icon_bag.unmute);
            m_media_context_menu_mute_unmute_action->set_text("Un&mute"sv);
        } else {
            m_media_context_menu_mute_unmute_action->set_icon(g_icon_bag.mute);
            m_media_context_menu_mute_unmute_action->set_text("&Mute"sv);
        }

        m_media_context_menu_controls_action->set_checked(menu.has_user_agent_controls);
        m_media_context_menu_loop_action->set_checked(menu.is_looping);

        auto screen_position = view().screen_relative_rect().location().translated(widget_position);

        if (menu.is_video)
            m_video_context_menu->popup(screen_position);
        else
            m_audio_context_menu->popup(screen_position);
    };

    view().on_link_middle_click = [this](auto& href, auto&, auto) {
        view().on_link_click(href, "_blank", 0);
    };

    view().on_title_change = [this](auto const& title) {
        m_history.update_title(title);
        m_title = title;

        if (on_title_change)
            on_title_change(m_title);
    };

    view().on_favicon_change = [this](auto& icon) {
        m_icon = icon;
        m_location_box->set_icon(&icon);
        if (on_favicon_change)
            on_favicon_change(icon);
    };

    view().on_request_alert = [this](String const& message) {
        auto& window = this->window();

        m_dialog = GUI::MessageBox::create(&window, message, "Alert"sv, GUI::MessageBox::Type::Information, GUI::MessageBox::InputType::OK).release_value_but_fixme_should_propagate_errors();
        m_dialog->set_icon(window.icon());
        m_dialog->exec();

        view().alert_closed();
        m_dialog = nullptr;
    };

    view().on_request_confirm = [this](String const& message) {
        auto& window = this->window();

        m_dialog = GUI::MessageBox::create(&window, message, "Confirm"sv, GUI::MessageBox::Type::Warning, GUI::MessageBox::InputType::OKCancel).release_value_but_fixme_should_propagate_errors();
        m_dialog->set_icon(window.icon());

        view().confirm_closed(m_dialog->exec() == GUI::Dialog::ExecResult::OK);
        m_dialog = nullptr;
    };

    view().on_request_prompt = [this](String const& message, String const& default_) {
        auto& window = this->window();

        String mutable_value = default_;
        m_dialog = GUI::InputBox::create(&window, mutable_value, message, "Prompt"sv, GUI::InputType::Text).release_value_but_fixme_should_propagate_errors();
        m_dialog->set_icon(window.icon());

        if (m_dialog->exec() == GUI::InputBox::ExecResult::OK) {
            auto const& dialog = static_cast<GUI::InputBox const&>(*m_dialog);
            auto response = dialog.text_value();

            view().prompt_closed(move(response));
        } else {
            view().prompt_closed({});
        }

        m_dialog = nullptr;
    };

    view().on_request_set_prompt_text = [this](String const& message) {
        if (m_dialog && is<GUI::InputBox>(*m_dialog))
            static_cast<GUI::InputBox&>(*m_dialog).set_text_value(message);
    };

    view().on_request_accept_dialog = [this]() {
        if (m_dialog)
            m_dialog->done(GUI::Dialog::ExecResult::OK);
    };

    view().on_request_dismiss_dialog = [this]() {
        if (m_dialog)
            m_dialog->done(GUI::Dialog::ExecResult::Cancel);
    };

    view().on_request_color_picker = [this](Color current_color) {
        auto& window = this->window();

        m_dialog = GUI::ColorPicker::construct(current_color, &window);
        auto& dialog = static_cast<GUI::ColorPicker&>(*m_dialog);

        dialog.set_icon(window.icon());
        dialog.set_color_has_alpha_channel(false);
        dialog.on_color_changed = [this](Color color) {
            view().color_picker_update(color, Web::HTML::ColorPickerUpdateState::Update);
        };

        if (dialog.exec() == GUI::ColorPicker::ExecResult::OK)
            view().color_picker_update(dialog.color(), Web::HTML::ColorPickerUpdateState::Closed);
        else
            view().color_picker_update({}, Web::HTML::ColorPickerUpdateState::Closed);

        m_dialog = nullptr;
    };

    view().on_request_file_picker = [this](auto const& accepted_file_types, auto allow_multiple_files) {
        // FIXME: GUI::FilePicker does not allow selecting multiple files at once.
        (void)allow_multiple_files;

        Vector<Web::HTML::SelectedFile> selected_files;
        auto& window = this->window();

        auto create_selected_file = [&](auto file_path) {
            if (auto file = Web::HTML::SelectedFile::from_file_path(file_path); file.is_error())
                warnln("Unable to open file {}: {}", file_path, file.error());
            else
                selected_files.append(file.release_value());
        };

        Vector<GUI::FileTypeFilter> accepted_file_filters;

        for (auto const& filter : accepted_file_types.filters) {
            filter.visit(
                [&](Web::HTML::FileFilter::FileType type) {
                    switch (type) {
                    case Web::HTML::FileFilter::FileType::Audio:
                        accepted_file_filters.append(GUI::FileTypeFilter::audio_files());
                        break;
                    case Web::HTML::FileFilter::FileType::Image:
                        accepted_file_filters.append(GUI::FileTypeFilter::image_files());
                        break;
                    case Web::HTML::FileFilter::FileType::Video:
                        accepted_file_filters.append(GUI::FileTypeFilter::video_files());
                        break;
                    }
                },
                [&](Web::HTML::FileFilter::MimeType const& filter) {
                    if (auto mime_type = Core::get_mime_type_data(filter.value); mime_type.has_value()) {
                        Vector<ByteString> extensions;
                        extensions.ensure_capacity(mime_type->common_extensions.size());

                        for (auto extension : mime_type->common_extensions)
                            extensions.append(extension);

                        accepted_file_filters.append({ mime_type->description, move(extensions) });
                    }
                },
                [&](Web::HTML::FileFilter::Extension const& filter) {
                    accepted_file_filters.empend(ByteString {}, Vector<ByteString> { filter.value.to_byte_string() });
                });
        }

        accepted_file_filters.size() > 1 ? accepted_file_filters.prepend(GUI::FileTypeFilter::all_files()) : accepted_file_filters.append(GUI::FileTypeFilter::all_files());

        if (auto path = GUI::FilePicker::get_open_filepath(&window, "Select file", Core::StandardPaths::home_directory(), false, GUI::Dialog::ScreenPosition::CenterWithinParent, move(accepted_file_filters)); path.has_value())
            create_selected_file(path.release_value());

        view().file_picker_closed(std::move(selected_files));
    };

    m_select_dropdown = GUI::Menu::construct();
    m_select_dropdown->on_visibility_change = [this](bool visible) {
        if (!visible && !m_select_dropdown_closed_by_action)
            view().select_dropdown_closed({});
    };

    view().on_request_select_dropdown = [this](Gfx::IntPoint content_position, i32 minimum_width, Vector<Web::HTML::SelectItem> items) {
        m_select_dropdown_closed_by_action = false;
        m_select_dropdown->remove_all_actions();
        m_select_dropdown->set_minimum_width(minimum_width);
        for (auto const& item : items) {
            select_dropdown_add_item(*m_select_dropdown, item);
        }

        m_select_dropdown->popup(view().screen_relative_rect().location().translated(content_position));
    };

    view().on_received_source = [this](auto& url, auto& source) {
        view_source(url, source);
    };

    auto focus_location_box_action = GUI::Action::create(
        "Focus location box", { Mod_Ctrl, Key_L }, Key_F6, [this](auto&) {
            m_location_box->set_focus(true);
            m_location_box->select_current_line();
        },
        this);

    m_statusbar = *find_descendant_of_type_named<GUI::Statusbar>("statusbar");

    view().on_link_hover = [this](auto& url) {
        update_status(String::from_byte_string(url.to_byte_string()).release_value_but_fixme_should_propagate_errors());
    };

    view().on_link_unhover = [this]() {
        view().set_override_cursor(Gfx::StandardCursor::None);
        update_status();
    };

    view().on_new_web_view = [this](auto activate_tab, auto, auto) {
        // FIXME: Create a child tab that re-uses the ConnectionFromClient of the parent tab
        auto& tab = this->window().create_new_tab(URL::URL("about:blank"), activate_tab);
        return tab.view().handle();
    };

    view().on_activate_tab = [this]() {
        on_activate_tab_request(*this);
    };

    view().on_close = [this] {
        on_tab_close_request(*this);
    };

    view().on_insert_clipboard_entry = [](auto const& data, auto const&, auto const& mime_type) {
        GUI::Clipboard::the().set_data(data.bytes(), mime_type.to_byte_string());
    };

    m_tab_context_menu = GUI::Menu::construct();
    m_tab_context_menu->add_action(GUI::CommonActions::make_reload_action([this](auto&) {
        reload();
    }));
    m_tab_context_menu->add_action(GUI::CommonActions::make_close_tab_action([this](auto&) {
        on_tab_close_request(*this);
    }));
    m_tab_context_menu->add_action(GUI::Action::create("&Duplicate Tab", g_icon_bag.duplicate_tab, [this](auto&) {
        on_tab_open_request(url());
    }));
    m_tab_context_menu->add_action(GUI::Action::create("Close &Other Tabs", g_icon_bag.close_other_tabs, [this](auto&) {
        on_tab_close_other_request(*this);
    }));

    auto search_selected_text_action = GUI::Action::create(
        "&Search for <query>"sv, g_icon_bag.search, [this](auto&) {
            auto url = MUST(String::formatted(g_search_engine, URL::percent_encode(*m_page_context_menu_search_text)));
            this->window().create_new_tab(url, Web::HTML::ActivateTab::Yes);
        },
        this);

    auto take_screenshot = [this](auto type) {
        auto& view = this->view();

        view.take_screenshot(type)
            ->when_resolved([this](auto const& path) {
                auto message = MUST(String::formatted("Screenshot saved to: {}", path));
                auto response = GUI::MessageBox::show(&this->window(), message, "Ladybird"sv, GUI::MessageBox::Type::Information, GUI::MessageBox::InputType::OKReveal);

                if (response == GUI::MessageBox::ExecResult::Reveal)
                    Desktop::Launcher::open(URL::create_with_file_scheme(path.dirname()));
            })
            .when_rejected([this](auto const& error) {
                auto error_message = MUST(String::formatted("{}", error));
                GUI::MessageBox::show_error(&this->window(), error_message);
            });
    };

    auto take_visible_screenshot_action = GUI::Action::create(
        "Take &Visible Screenshot"sv, g_icon_bag.filetype_image, [take_screenshot](auto&) {
            take_screenshot(WebView::ViewImplementation::ScreenshotType::Visible);
        },
        this);
    take_visible_screenshot_action->set_status_tip("Save a screenshot of the visible portion of the current tab to the Downloads directory"_string);

    auto take_full_screenshot_action = GUI::Action::create(
        "Take &Full Screenshot"sv, g_icon_bag.filetype_image, [take_screenshot](auto&) {
            take_screenshot(WebView::ViewImplementation::ScreenshotType::Full);
        },
        this);
    take_full_screenshot_action->set_status_tip("Save a screenshot of the entirety of the current tab to the Downloads directory"_string);

    m_page_context_menu = GUI::Menu::construct();
    m_page_context_menu->add_action(window.go_back_action());
    m_page_context_menu->add_action(window.go_forward_action());
    m_page_context_menu->add_action(window.reload_action());
    m_page_context_menu->add_separator();
    m_page_context_menu->add_action(window.copy_selection_action());
    m_page_context_menu->add_action(window.paste_action());
    m_page_context_menu->add_action(window.select_all_action());
    // FIXME: It would be nice to have a separator here, but the below action is sometimes hidden, and WindowServer
    //        does not hide successive separators like other toolkits.
    m_page_context_menu->add_action(search_selected_text_action);
    m_page_context_menu->add_separator();
    m_page_context_menu->add_action(move(take_visible_screenshot_action));
    m_page_context_menu->add_action(move(take_full_screenshot_action));
    m_page_context_menu->add_separator();
    m_page_context_menu->add_action(window.view_source_action());
    m_page_context_menu->add_action(window.inspect_dom_tree_action());
    m_page_context_menu->add_action(window.inspect_dom_node_action());

    m_page_context_menu->on_visibility_change = [this](auto visible) {
        if (!visible)
            m_page_context_menu_search_text = {};
    };

    view().on_context_menu_request = [&, search_selected_text_action = move(search_selected_text_action)](auto widget_position) {
        m_page_context_menu_search_text = g_search_engine.is_empty()
            ? OptionalNone {}
            : view().selected_text_with_whitespace_collapsed();

        if (m_page_context_menu_search_text.has_value()) {
            auto action_text = WebView::format_search_query_for_display(g_search_engine, *m_page_context_menu_search_text);
            search_selected_text_action->set_text(action_text.to_byte_string());
            search_selected_text_action->set_visible(true);
        } else {
            search_selected_text_action->set_visible(false);
        }

        auto screen_position = view().screen_relative_rect().location().translated(widget_position);
        m_page_context_menu->popup(screen_position);
    };
}

void Tab::select_dropdown_add_item(GUI::Menu& menu, Web::HTML::SelectItem const& item)
{
    if (item.type == Web::HTML::SelectItem::Type::OptionGroup) {
        auto subtitle = GUI::Action::create(MUST(ByteString::from_utf8(item.label.value_or(""_string))), nullptr);
        subtitle->set_enabled(false);
        menu.add_action(subtitle);

        for (auto const& item : *item.items) {
            select_dropdown_add_item(menu, item);
        }
    }
    if (item.type == Web::HTML::SelectItem::Type::Option) {
        auto action = GUI::Action::create(MUST(ByteString::from_utf8(item.label.value_or(""_string))), [this, item](GUI::Action&) {
            m_select_dropdown_closed_by_action = true;
            view().select_dropdown_closed(item.value.value_or(""_string));
        });
        action->set_checkable(true);
        action->set_checked(item.selected);
        menu.add_action(action);
    }
    if (item.type == Web::HTML::SelectItem::Type::Separator) {
        menu.add_separator();
    }
}

void Tab::update_reset_zoom_button()
{
    auto zoom_level = view().zoom_level();
    if (zoom_level != 1.0f) {
        m_reset_zoom_button->set_text(MUST(String::formatted("{}%", round_to<int>(zoom_level * 100))));
        m_reset_zoom_button->set_visible(true);
    } else {
        m_reset_zoom_button->set_visible(false);
    }
}

void Tab::load(URL::URL const& url, LoadType load_type)
{
    m_is_history_navigation = (load_type == LoadType::HistoryNavigation);
    m_web_content_view->load(url);
    m_location_box->set_focus(false);
}

URL::URL Tab::url() const
{
    return m_web_content_view->url();
}

void Tab::reload()
{
    if (m_history.is_empty())
        return;

    load(url());
}

void Tab::go_back(int steps)
{
    if (!m_history.can_go_back(steps))
        return;

    m_history.go_back(steps);
    update_actions();
    load(m_history.current().url, LoadType::HistoryNavigation);
}

void Tab::go_forward(int steps)
{
    if (!m_history.can_go_forward(steps))
        return;

    m_history.go_forward(steps);
    update_actions();
    load(m_history.current().url, LoadType::HistoryNavigation);
}

void Tab::update_actions()
{
    auto& window = this->window();
    if (this != &window.active_tab())
        return;
    window.go_back_action().set_enabled(m_history.can_go_back());
    window.go_forward_action().set_enabled(m_history.can_go_forward());
    window.reload_action().set_enabled(!m_history.is_empty());
}

ErrorOr<void> Tab::bookmark_current_url()
{
    auto url = this->url().to_byte_string();
    if (BookmarksBarWidget::the().contains_bookmark(url)) {
        TRY(BookmarksBarWidget::the().remove_bookmark(url));
    } else {
        TRY(BookmarksBarWidget::the().add_bookmark(url, m_title));
    }

    return {};
}

void Tab::update_bookmark_button(StringView url)
{
    if (BookmarksBarWidget::the().contains_bookmark(url)) {
        m_bookmark_button->set_icon(g_icon_bag.bookmark_filled);
        m_bookmark_button->set_tooltip("Remove Bookmark"_string);
    } else {
        m_bookmark_button->set_icon(g_icon_bag.bookmark_contour);
        m_bookmark_button->set_tooltip("Add Bookmark"_string);
    }
}

void Tab::did_become_active()
{
    BookmarksBarWidget::the().on_bookmark_click = [this](auto& url, auto open) {
        if (open == BookmarksBarWidget::Open::InNewTab)
            on_tab_open_request(url);
        else if (open == BookmarksBarWidget::Open::InNewWindow)
            on_window_open_request(url);
        else
            load(url);
    };

    BookmarksBarWidget::the().on_bookmark_hover = [this](auto&, auto& url) {
        m_statusbar->set_text(String::from_byte_string(url).release_value_but_fixme_should_propagate_errors());
    };

    BookmarksBarWidget::the().on_bookmark_change = [this]() {
        update_bookmark_button(url().to_byte_string());
    };

    BookmarksBarWidget::the().remove_from_parent();
    m_toolbar_container->add_child(BookmarksBarWidget::the());

    auto is_fullscreen = window().is_fullscreen();
    m_toolbar_container->set_visible(!is_fullscreen);
    m_statusbar->set_visible(!is_fullscreen);

    update_actions();
}

void Tab::context_menu_requested(Gfx::IntPoint screen_position)
{
    m_tab_context_menu->popup(screen_position);
}

void Tab::content_filters_changed()
{
    if (g_content_filters_enabled)
        m_web_content_view->set_content_filters(g_content_filters);
    else
        m_web_content_view->set_content_filters({});
}

void Tab::autoplay_allowlist_changed()
{
    if (g_autoplay_allowed_on_all_websites)
        m_web_content_view->set_autoplay_allowed_on_all_websites();
    else
        m_web_content_view->set_autoplay_allowlist(g_autoplay_allowlist);
}

void Tab::proxy_mappings_changed()
{
    m_web_content_view->set_proxy_mappings(g_proxies, g_proxy_mappings);
}

void Tab::action_entered(GUI::Action& action)
{
    m_statusbar->set_override_text(action.status_tip());
}

void Tab::action_left(GUI::Action&)
{
    m_statusbar->set_override_text({});
}

void Tab::window_position_changed(Gfx::IntPoint position)
{
    m_web_content_view->set_window_position(position);
}

void Tab::window_size_changed(Gfx::IntSize size)
{
    m_web_content_view->set_window_size(size);
}

BrowserWindow const& Tab::window() const
{
    return static_cast<BrowserWindow const&>(*Widget::window());
}

BrowserWindow& Tab::window()
{
    return static_cast<BrowserWindow&>(*Widget::window());
}

void Tab::show_inspector_window(Browser::Tab::InspectorTarget inspector_target)
{
    if (!m_dom_inspector_widget) {
        auto window = GUI::Window::construct(&this->window());
        window->set_window_mode(GUI::WindowMode::Modeless);
        window->resize(750, 500);
        window->set_title("Inspector");
        window->set_icon(g_icon_bag.inspector_object);
        window->on_close = [&]() {
            m_web_content_view->clear_inspected_dom_node();
        };

        m_dom_inspector_widget = window->set_main_widget<InspectorWidget>(*m_web_content_view);
    } else {
        m_dom_inspector_widget->inspect();
    }

    if (inspector_target == InspectorTarget::HoveredElement) {
        m_dom_inspector_widget->select_hovered_node();
    } else {
        VERIFY(inspector_target == InspectorTarget::Document);
        m_dom_inspector_widget->select_default_node();
    }

    auto* window = m_dom_inspector_widget->window();
    window->show();
    window->move_to_front();
}

void Tab::close_sub_widgets()
{
    auto close_widget_window = [](auto& widget) {
        if (widget) {
            auto* window = widget->window();
            window->close();
        }
    };
    close_widget_window(m_dom_inspector_widget);
    close_widget_window(m_storage_widget);
}

void Tab::show_storage_inspector()
{
    if (!m_storage_widget) {
        auto storage_window = GUI::Window::construct(&window());
        storage_window->resize(500, 300);
        storage_window->set_title("Storage Inspector");
        storage_window->set_icon(g_icon_bag.cookie);
        m_storage_widget = storage_window->set_main_widget<StorageWidget>();
        m_storage_widget->on_update_cookie = [this](Web::Cookie::Cookie cookie) {
            if (view().on_update_cookie)
                view().on_update_cookie(move(cookie));
        };
    }

    if (on_get_cookies_entries) {
        auto cookies = on_get_cookies_entries();
        m_storage_widget->clear_cookies();
        m_storage_widget->set_cookies_entries(cookies);
    }

    if (on_get_local_storage_entries) {
        auto local_storage_entries = on_get_local_storage_entries();
        m_storage_widget->clear_local_storage_entries();
        m_storage_widget->set_local_storage_entries(move(local_storage_entries));
    }

    if (on_get_session_storage_entries) {
        auto session_storage_entries = on_get_session_storage_entries();
        m_storage_widget->clear_session_storage_entries();
        m_storage_widget->set_session_storage_entries(move(session_storage_entries));
    }

    auto* window = m_storage_widget->window();
    window->show();
    window->move_to_front();
}

void Tab::show_history_inspector()
{
    if (!m_history_widget) {
        auto history_window = GUI::Window::construct(&window());
        history_window->resize(500, 300);
        history_window->set_title("History");
        history_window->set_icon(g_icon_bag.history);
        m_history_widget = history_window->set_main_widget<HistoryWidget>();
    }

    m_history_widget->clear_history_entries();
    m_history_widget->set_history_entries(m_history.get_all_history_entries());

    auto* window = m_history_widget->window();
    window->show();
    window->move_to_front();
}

void Tab::show_event(GUI::ShowEvent&)
{
    m_web_content_view->set_visible(true);
}

void Tab::hide_event(GUI::HideEvent&)
{
    m_web_content_view->set_visible(false);
}

void Tab::enable_webdriver_mode()
{
    m_web_content_view->connect_to_webdriver(Browser::g_webdriver_content_ipc_path);
    auto& webdriver_banner = *find_descendant_of_type_named<GUI::Widget>("webdriver_banner");
    webdriver_banner.set_visible(true);
}

}