use adw::{prelude::*, subclass::prelude::*};
use gettextrs::{gettext, ngettext};
use gtk::{
    gio,
    glib::{self, clone},
    pango, CompositeTemplate,
};
use ruma::{
    api::client::{
        directory::{get_room_visibility, set_room_visibility},
        discovery::get_capabilities::Capabilities,
        room::{upgrade_room, Visibility},
    },
    events::{
        room::{
            guest_access::{GuestAccess, RoomGuestAccessEventContent},
            history_visibility::RoomHistoryVisibilityEventContent,
            power_levels::PowerLevelAction,
        },
        StateEventType,
    },
};
use tracing::error;

use super::{room_upgrade_dialog::confirm_room_upgrade, MemberRow, MembershipLists, RoomDetails};
use crate::{
    components::{
        ButtonCountRow, CheckLoadingRow, ComboLoadingRow, CopyableRow, LoadingButton,
        SwitchLoadingRow,
    },
    gettext_f,
    prelude::*,
    session::model::{
        HistoryVisibilityValue, JoinRuleValue, Member, NotificationsRoomSetting, Room, RoomCategory,
    },
    spawn, spawn_tokio, toast,
    utils::{
        expression, matrix::MatrixIdUri, template_callbacks::TemplateCallbacks, BoundObjectWeakRef,
        OngoingAsyncAction,
    },
    Window,
};

mod imp {
    use std::{
        cell::{Cell, RefCell},
        marker::PhantomData,
    };

    use glib::subclass::InitializingObject;

    use super::*;

    #[derive(Debug, Default, CompositeTemplate, glib::Properties)]
    #[template(
        resource = "/org/gnome/Fractal/ui/session/view/content/room_details/general_page.ui"
    )]
    #[properties(wrapper_type = super::GeneralPage)]
    pub struct GeneralPage {
        #[template_child]
        pub room_topic: TemplateChild<gtk::Label>,
        #[template_child]
        pub edit_details_btn: TemplateChild<gtk::Button>,
        #[template_child]
        pub direct_members_group: TemplateChild<adw::PreferencesGroup>,
        #[template_child]
        pub direct_members_list: TemplateChild<gtk::ListBox>,
        #[template_child]
        pub no_direct_members_label: TemplateChild<gtk::Label>,
        #[template_child]
        pub members_row_group: TemplateChild<adw::PreferencesGroup>,
        #[template_child]
        pub members_row: TemplateChild<ButtonCountRow>,
        #[template_child]
        pub notifications: TemplateChild<adw::PreferencesGroup>,
        #[template_child]
        pub notifications_global_row: TemplateChild<CheckLoadingRow>,
        #[template_child]
        pub notifications_all_row: TemplateChild<CheckLoadingRow>,
        #[template_child]
        pub notifications_mentions_row: TemplateChild<CheckLoadingRow>,
        #[template_child]
        pub notifications_mute_row: TemplateChild<CheckLoadingRow>,
        #[template_child]
        pub addresses_group: TemplateChild<adw::PreferencesGroup>,
        #[template_child]
        pub edit_addresses_button: TemplateChild<gtk::Button>,
        #[template_child]
        pub no_addresses_label: TemplateChild<gtk::Label>,
        pub canonical_alias_row: RefCell<Option<CopyableRow>>,
        pub alt_aliases_rows: RefCell<Vec<CopyableRow>>,
        #[template_child]
        pub join_rule: TemplateChild<ComboLoadingRow>,
        #[template_child]
        pub guest_access: TemplateChild<SwitchLoadingRow>,
        #[template_child]
        pub publish: TemplateChild<SwitchLoadingRow>,
        #[template_child]
        pub history_visibility: TemplateChild<ComboLoadingRow>,
        #[template_child]
        pub encryption: TemplateChild<SwitchLoadingRow>,
        #[template_child]
        pub upgrade_button: TemplateChild<LoadingButton>,
        #[template_child]
        pub room_federated: TemplateChild<adw::ActionRow>,
        /// The presented room.
        #[property(get, set = Self::set_room, construct_only)]
        room: BoundObjectWeakRef<Room>,
        /// The lists of members filtered by membership for the room.
        #[property(get, set = Self::set_membership_lists, construct_only)]
        membership_lists: glib::WeakRef<MembershipLists>,
        /// The notifications setting for the room.
        #[property(get = Self::notifications_setting, set = Self::set_notifications_setting, explicit_notify, builder(NotificationsRoomSetting::default()))]
        pub notifications_setting: PhantomData<NotificationsRoomSetting>,
        /// Whether the notifications section is busy.
        #[property(get)]
        pub notifications_loading: Cell<bool>,
        /// Whether the room is published in the directory.
        #[property(get)]
        pub is_published: Cell<bool>,
        pub changing_avatar: RefCell<Option<OngoingAsyncAction<String>>>,
        pub changing_name: RefCell<Option<OngoingAsyncAction<String>>>,
        pub changing_topic: RefCell<Option<OngoingAsyncAction<String>>>,
        pub expr_watch: RefCell<Option<gtk::ExpressionWatch>>,
        pub notifications_settings_handlers: RefCell<Vec<glib::SignalHandlerId>>,
        pub membership_handler: RefCell<Option<glib::SignalHandlerId>>,
        pub permissions_handler: RefCell<Option<glib::SignalHandlerId>>,
        pub canonical_alias_handler: RefCell<Option<glib::SignalHandlerId>>,
        pub alt_aliases_handler: RefCell<Option<glib::SignalHandlerId>>,
        pub join_rule_handler: RefCell<Option<glib::SignalHandlerId>>,
        pub capabilities: RefCell<Capabilities>,
        direct_members_list_has_bound_model: Cell<bool>,
    }

    #[glib::object_subclass]
    impl ObjectSubclass for GeneralPage {
        const NAME: &'static str = "RoomDetailsGeneralPage";
        type Type = super::GeneralPage;
        type ParentType = adw::PreferencesPage;

        fn class_init(klass: &mut Self::Class) {
            CopyableRow::ensure_type();

            Self::bind_template(klass);
            Self::Type::bind_template_callbacks(klass);
            TemplateCallbacks::bind_template_callbacks(klass);

            klass
                .install_property_action("room.set-notifications-setting", "notifications-setting");
        }

        fn instance_init(obj: &InitializingObject<Self>) {
            obj.init_template();
        }
    }

    #[glib::derived_properties]
    impl ObjectImpl for GeneralPage {
        fn constructed(&self) {
            self.parent_constructed();
            let obj = self.obj();

            self.room_topic.connect_activate_link(clone!(
                #[weak]
                obj,
                #[upgrade_or]
                glib::Propagation::Proceed,
                move |_, uri| {
                    let Ok(uri) = MatrixIdUri::parse(uri) else {
                        return glib::Propagation::Proceed;
                    };
                    let Some(room_details) = obj
                        .ancestor(RoomDetails::static_type())
                        .and_downcast::<RoomDetails>()
                    else {
                        return glib::Propagation::Proceed;
                    };
                    let Some(parent_window) = room_details.transient_for().and_downcast::<Window>()
                    else {
                        return glib::Propagation::Proceed;
                    };

                    parent_window.session_view().show_matrix_uri(uri);
                    room_details.close();

                    glib::Propagation::Stop
                }
            ));
        }

        fn dispose(&self) {
            self.disconnect_all();
        }
    }

    impl WidgetImpl for GeneralPage {}
    impl PreferencesPageImpl for GeneralPage {}

    impl GeneralPage {
        /// Set the presented room.
        #[allow(clippy::too_many_lines)]
        fn set_room(&self, room: &Room) {
            let obj = self.obj();

            let membership_handler = room.own_member().connect_membership_notify(clone!(
                #[weak]
                obj,
                move |_| {
                    obj.update_notifications();
                }
            ));
            self.membership_handler.replace(Some(membership_handler));

            let permissions_handler = room.permissions().connect_changed(clone!(
                #[weak]
                obj,
                move |_| {
                    obj.update_upgrade_button();
                    obj.update_edit_addresses_button();
                    obj.update_join_rule();
                    obj.update_guest_access();
                    obj.update_history_visibility();
                    obj.update_encryption();

                    spawn!(async move {
                        obj.update_publish().await;
                    });
                }
            ));
            self.permissions_handler.replace(Some(permissions_handler));

            let aliases = room.aliases();
            let canonical_alias_handler = aliases.connect_canonical_alias_string_notify(clone!(
                #[weak]
                obj,
                move |_| {
                    obj.update_addresses();
                }
            ));
            self.canonical_alias_handler
                .replace(Some(canonical_alias_handler));

            let alt_aliases_handler = aliases.alt_aliases_model().connect_items_changed(clone!(
                #[weak]
                obj,
                move |_, _, _, _| {
                    obj.update_addresses();
                }
            ));
            self.alt_aliases_handler.replace(Some(alt_aliases_handler));

            let join_rule_handler = room.join_rule().connect_changed(clone!(
                #[weak]
                obj,
                move |_| {
                    obj.update_join_rule();
                }
            ));
            self.join_rule_handler.replace(Some(join_rule_handler));

            let room_handler_ids = vec![
                room.connect_joined_members_count_notify(clone!(
                    #[weak(rename_to = imp)]
                    self,
                    move |_| {
                        imp.update_members();
                    }
                )),
                room.connect_is_direct_notify(clone!(
                    #[weak(rename_to = imp)]
                    self,
                    move |_| {
                        imp.update_members();
                    }
                )),
                room.connect_category_notify(clone!(
                    #[weak(rename_to = imp)]
                    self,
                    move |_| {
                        imp.update_members();
                    }
                )),
                room.connect_notifications_setting_notify(clone!(
                    #[weak]
                    obj,
                    move |_| {
                        obj.update_notifications();
                    }
                )),
                room.connect_is_tombstoned_notify(clone!(
                    #[weak]
                    obj,
                    move |_| {
                        obj.update_upgrade_button();
                    }
                )),
                room.connect_guests_allowed_notify(clone!(
                    #[weak]
                    obj,
                    move |_| {
                        obj.update_guest_access();
                    }
                )),
                room.connect_history_visibility_notify(clone!(
                    #[weak]
                    obj,
                    move |_| {
                        obj.update_history_visibility();
                    }
                )),
                room.connect_is_encrypted_notify(clone!(
                    #[weak]
                    obj,
                    move |_| {
                        obj.update_encryption();
                    }
                )),
            ];

            self.room.set(room, room_handler_ids);
            obj.notify_room();

            if let Some(session) = room.session() {
                let settings = session.notifications().settings();
                let notifications_settings_handlers = vec![
                    settings.connect_account_enabled_notify(clone!(
                        #[weak]
                        obj,
                        move |_| {
                            obj.update_notifications();
                        }
                    )),
                    settings.connect_session_enabled_notify(clone!(
                        #[weak]
                        obj,
                        move |_| {
                            obj.update_notifications();
                        }
                    )),
                ];

                self.notifications_settings_handlers
                    .replace(notifications_settings_handlers);
            }

            self.init_edit_details();
            self.update_members();
            obj.update_notifications();
            obj.update_edit_addresses_button();
            obj.update_addresses();
            obj.update_federated();
            obj.update_join_rule();
            obj.update_guest_access();
            obj.update_publish_title();
            obj.update_history_visibility();
            obj.update_encryption();
            obj.update_upgrade_button();

            spawn!(clone!(
                #[weak]
                obj,
                async move {
                    obj.update_publish().await;
                }
            ));

            self.load_capabilities();
        }

        /// Set the lists of members filtered by membership for the room.
        fn set_membership_lists(&self, membership_lists: &MembershipLists) {
            self.membership_lists.set(Some(membership_lists));
            self.update_members();
        }

        /// The notifications setting for the room.
        fn notifications_setting(&self) -> NotificationsRoomSetting {
            self.room
                .obj()
                .map(|r| r.notifications_setting())
                .unwrap_or_default()
        }

        /// Set the notifications setting for the room.
        fn set_notifications_setting(&self, setting: NotificationsRoomSetting) {
            if self.notifications_setting() == setting {
                return;
            }

            self.obj().notifications_setting_changed(setting);
        }

        /// Fetch the capabilities of the homeserver.
        fn load_capabilities(&self) {
            let Some(room) = self.room.obj() else {
                return;
            };
            let client = room.matrix_room().client();

            spawn!(
                glib::Priority::LOW,
                clone!(
                    #[weak(rename_to = imp)]
                    self,
                    async move {
                        let handle = spawn_tokio!(async move { client.get_capabilities().await });
                        match handle.await.unwrap() {
                            Ok(capabilities) => {
                                imp.capabilities.replace(capabilities);
                            }
                            Err(error) => {
                                error!("Could not get server capabilities: {error}");
                                imp.capabilities.take();
                            }
                        }
                    }
                )
            );
        }

        /// Initialize the button to edit details.
        fn init_edit_details(&self) {
            let Some(room) = self.room.obj() else {
                return;
            };

            // Hide edit button when the user cannot edit any detail or when the room is
            // direct.
            let permissions = room.permissions();
            let can_change_avatar = permissions.property_expression("can-change-avatar");
            let can_change_name = permissions.property_expression("can-change-name");
            let can_change_topic = permissions.property_expression("can-change-topic");

            let can_change_name_or_topic = expression::or(can_change_name, can_change_topic);
            let can_edit_at_least_one_detail =
                expression::or(can_change_name_or_topic, can_change_avatar);

            let is_direct_expr = room.property_expression("is-direct");

            let expr_watch = expression::and(
                expression::not(is_direct_expr),
                can_edit_at_least_one_detail,
            )
            .bind(&*self.edit_details_btn, "visible", gtk::Widget::NONE);
            self.expr_watch.replace(Some(expr_watch));
        }

        /// Update the members section.
        fn update_members(&self) {
            let Some(room) = self.room.obj() else {
                return;
            };
            let Some(membership_lists) = self.membership_lists.upgrade() else {
                return;
            };

            let joined_members_count = membership_lists.joined().n_items();

            // When the room is direct there should only be 2 members in most cases, but use
            // the members count to make sure we do not show a list that is too long.
            let is_direct_with_few_members = room.is_direct() && joined_members_count < 5;
            if is_direct_with_few_members {
                let title = ngettext("Member", "Members", joined_members_count);
                self.direct_members_group.set_title(&title);

                // Set model of direct members list dynamically to avoid creating unnecessary
                // widgets in the background.
                if !self.direct_members_list_has_bound_model.get() {
                    self.direct_members_list
                        .bind_model(Some(&membership_lists.joined()), |item| {
                            let member = item
                                .downcast_ref::<Member>()
                                .expect("joined members list contains members");
                            let member_row = MemberRow::new(false);
                            member_row.set_member(Some(member));

                            gtk::ListBoxRow::builder()
                                .selectable(false)
                                .child(&member_row)
                                .action_name("details.show-member")
                                .action_target(&member.user_id().as_str().to_variant())
                                .build()
                                .upcast()
                        });
                    self.direct_members_list_has_bound_model.set(true);
                }

                let has_members = joined_members_count > 0;
                self.direct_members_list.set_visible(has_members);
                self.no_direct_members_label.set_visible(!has_members);
            } else {
                let mut server_joined_members_count = room.joined_members_count();

                if room.category() == RoomCategory::Left {
                    // The number of joined members count from the homeserver is only updated when
                    // we are joined, so we must at least remove ourself from the count after we
                    // left.
                    server_joined_members_count = server_joined_members_count.saturating_sub(1);
                }

                // Use the maximum between the count of joined members in the local list, and
                // the one provided by the homeserver. The homeserver is usually right, except
                // when we just joined a room, where it will be 0 for a while.
                let joined_members_count =
                    server_joined_members_count.max(joined_members_count.into());
                self.members_row.set_count(joined_members_count.to_string());

                let n = joined_members_count.try_into().unwrap_or(u32::MAX);
                let title = ngettext("Member", "Members", n);
                self.members_row.set_title(&title);

                if self.direct_members_list_has_bound_model.get() {
                    self.direct_members_list
                        .bind_model(None::<&gio::ListModel>, |_item| {
                            gtk::ListBoxRow::new().upcast()
                        });
                    self.direct_members_list_has_bound_model.set(false);
                }
            }

            self.direct_members_group
                .set_visible(is_direct_with_few_members);
            self.members_row_group
                .set_visible(!is_direct_with_few_members);
        }

        /// Disconnect all the signals.
        fn disconnect_all(&self) {
            if let Some(room) = self.room.obj() {
                if let Some(session) = room.session() {
                    let settings = session.notifications().settings();
                    for handler in self.notifications_settings_handlers.take() {
                        settings.disconnect(handler);
                    }
                }

                if let Some(handler) = self.membership_handler.take() {
                    room.own_member().disconnect(handler);
                }

                if let Some(handler) = self.permissions_handler.take() {
                    room.permissions().disconnect(handler);
                }

                let aliases = room.aliases();
                if let Some(handler) = self.canonical_alias_handler.take() {
                    aliases.disconnect(handler);
                }
                if let Some(handler) = self.alt_aliases_handler.take() {
                    aliases.alt_aliases_model().disconnect(handler);
                }

                if let Some(handler) = self.join_rule_handler.take() {
                    room.join_rule().disconnect(handler);
                }
            }

            self.room.disconnect_signals();

            if let Some(watch) = self.expr_watch.take() {
                watch.unwatch();
            }
        }
    }
}

glib::wrapper! {
    /// Preference Window to display and update room details.
    pub struct GeneralPage(ObjectSubclass<imp::GeneralPage>)
        @extends gtk::Widget, adw::PreferencesPage, @implements gtk::Accessible;
}

#[gtk::template_callbacks]
impl GeneralPage {
    pub fn new(room: &Room, membership_lists: &MembershipLists) -> Self {
        glib::Object::builder()
            .property("room", room)
            .property("membership-lists", membership_lists)
            .build()
    }

    /// Unselect the topic of the room.
    ///
    /// This is to circumvent the default GTK behavior to select all the text
    /// when opening the details.
    pub fn unselect_topic(&self) {
        let imp = self.imp();

        glib::idle_add_local_once(clone!(
            #[weak]
            imp,
            move || {
                // Put the cursor at the beginning of the title instead of having the title
                // selected, if it is visible.
                if imp.room_topic.is_visible() {
                    imp.room_topic.select_region(0, 0);
                }
            }
        ));
    }

    /// Update the section about notifications.
    fn update_notifications(&self) {
        let Some(room) = self.room() else {
            return;
        };
        let imp = self.imp();

        if !room.is_joined() {
            imp.notifications.set_visible(false);
            return;
        }

        let Some(session) = room.session() else {
            return;
        };

        // Updates the active radio button.
        self.notify_notifications_setting();

        let settings = session.notifications().settings();
        let sensitive = settings.account_enabled()
            && settings.session_enabled()
            && !self.notifications_loading();
        imp.notifications.set_sensitive(sensitive);
        imp.notifications.set_visible(true);
    }

    /// Update the loading state in the notifications section.
    fn set_notifications_loading(&self, loading: bool, setting: NotificationsRoomSetting) {
        let imp = self.imp();

        // Only show the spinner on the selected one.
        imp.notifications_global_row
            .set_is_loading(loading && setting == NotificationsRoomSetting::Global);
        imp.notifications_all_row
            .set_is_loading(loading && setting == NotificationsRoomSetting::All);
        imp.notifications_mentions_row
            .set_is_loading(loading && setting == NotificationsRoomSetting::MentionsOnly);
        imp.notifications_mute_row
            .set_is_loading(loading && setting == NotificationsRoomSetting::Mute);

        self.imp().notifications_loading.set(loading);
        self.notify_notifications_loading();
    }

    /// Handle a change of the notifications setting.
    fn notifications_setting_changed(&self, setting: NotificationsRoomSetting) {
        let Some(room) = self.room() else {
            return;
        };
        let Some(session) = room.session() else {
            return;
        };
        let imp = self.imp();

        if setting == room.notifications_setting() {
            // Nothing to do.
            return;
        }

        imp.notifications.set_sensitive(false);
        self.set_notifications_loading(true, setting);

        let settings = session.notifications().settings();
        spawn!(clone!(
            #[weak(rename_to = obj)]
            self,
            async move {
                if settings
                    .set_per_room_setting(room.room_id().to_owned(), setting)
                    .await
                    .is_err()
                {
                    toast!(obj, gettext("Could not change notifications setting"));
                }

                obj.set_notifications_loading(false, setting);
                obj.update_notifications();
            }
        ));
    }

    /// Update the button to edit addresses.
    fn update_edit_addresses_button(&self) {
        let Some(room) = self.room() else {
            return;
        };

        let can_edit = room.is_joined()
            && room
                .permissions()
                .is_allowed_to(PowerLevelAction::SendState(StateEventType::RoomPowerLevels));
        self.imp().edit_addresses_button.set_visible(can_edit);
    }

    /// Update the addresses group.
    fn update_addresses(&self) {
        let Some(room) = self.room() else {
            return;
        };
        let imp = self.imp();
        let aliases = room.aliases();

        let canonical_alias_string = aliases.canonical_alias_string();
        let has_canonical_alias = canonical_alias_string.is_some();

        if let Some(canonical_alias_string) = canonical_alias_string {
            let mut row_borrow = imp.canonical_alias_row.borrow_mut();
            let row = row_borrow.get_or_insert_with(|| {
                // We want the main alias always at the top but cannot add a row at the top so
                // we have to remove the other rows first.
                self.remove_alt_aliases_rows();

                let row = CopyableRow::new();
                row.set_copy_button_tooltip_text(Some(gettext("Copy address")));
                row.set_toast_text(Some(gettext("Address copied to clipboard")));

                // Mark the main alias with a tag.
                let label = gtk::Label::builder()
                    .label(gettext("Main Address"))
                    .ellipsize(pango::EllipsizeMode::End)
                    .css_classes(["public-address-tag"])
                    .valign(gtk::Align::Center)
                    .build();
                row.update_relation(&[gtk::accessible::Relation::DescribedBy(&[
                    label.upcast_ref()
                ])]);
                row.set_extra_suffix(Some(label));

                imp.addresses_group.add(&row);

                row
            });

            row.set_title(&canonical_alias_string);
        } else if let Some(row) = imp.canonical_alias_row.take() {
            imp.addresses_group.remove(&row);
        }

        let alt_aliases = aliases.alt_aliases_model();
        let alt_aliases_count = alt_aliases.n_items() as usize;
        if alt_aliases_count == 0 {
            self.remove_alt_aliases_rows();
        } else {
            let mut rows = imp.alt_aliases_rows.borrow_mut();

            for (pos, alt_alias) in alt_aliases.iter::<glib::Object>().enumerate() {
                let Some(alt_alias) = alt_alias.ok().and_downcast::<gtk::StringObject>() else {
                    break;
                };

                let row = rows.get(pos).cloned().unwrap_or_else(|| {
                    let row = CopyableRow::new();
                    row.set_copy_button_tooltip_text(Some(gettext("Copy address")));
                    row.set_toast_text(Some(gettext("Address copied to clipboard")));

                    imp.addresses_group.add(&row);
                    rows.push(row.clone());

                    row
                });

                row.set_title(&alt_alias.string());
            }

            let rows_count = rows.len();
            if alt_aliases_count < rows_count {
                for _ in alt_aliases_count..rows_count {
                    if let Some(row) = rows.pop() {
                        imp.addresses_group.remove(&row);
                    }
                }
            }
        }

        imp.no_addresses_label
            .set_visible(!has_canonical_alias && alt_aliases_count == 0);
    }

    fn remove_alt_aliases_rows(&self) {
        let imp = self.imp();

        for row in imp.alt_aliases_rows.take() {
            imp.addresses_group.remove(&row);
        }
    }

    /// Copy the room's permalink to the clipboard.
    #[template_callback]
    async fn copy_permalink(&self) {
        let Some(room) = self.room() else {
            return;
        };

        let permalink = room.matrix_to_uri().await;
        self.clipboard().set_text(&permalink.to_string());
        toast!(self, gettext("Room link copied to clipboard"));
    }

    /// Update the join rule row.
    fn update_join_rule(&self) {
        let Some(room) = self.room() else {
            return;
        };

        let row = &self.imp().join_rule;
        row.set_is_loading(false);

        let permissions = room.permissions();
        let join_rule = room.join_rule();

        let is_supported_join_rule = matches!(
            join_rule.value(),
            JoinRuleValue::Public | JoinRuleValue::Invite
        ) && !join_rule.can_knock();
        let can_change =
            permissions.is_allowed_to(PowerLevelAction::SendState(StateEventType::RoomJoinRules));

        row.set_read_only(!is_supported_join_rule || !can_change);
        row.set_selected_string(Some(join_rule.display_name()));
    }

    /// Set the join rule of the room.
    #[template_callback]
    async fn set_join_rule(&self) {
        let Some(room) = self.room() else {
            return;
        };
        let join_rule = room.join_rule();

        let row = &self.imp().join_rule;

        let value = match row.selected() {
            0 => JoinRuleValue::Invite,
            1 => JoinRuleValue::Public,
            _ => {
                return;
            }
        };

        if join_rule.value() == value {
            // Nothing to do.
            return;
        }

        row.set_is_loading(true);
        row.set_read_only(true);

        if join_rule.set_value(value).await.is_err() {
            toast!(self, gettext("Could not change who can join"));
            self.update_join_rule();
        }
    }

    /// Update the guest access row.
    fn update_guest_access(&self) {
        let Some(room) = self.room() else {
            return;
        };

        let row = &self.imp().guest_access;
        row.set_is_active(room.guests_allowed());
        row.set_is_loading(false);

        let can_change = room
            .permissions()
            .is_allowed_to(PowerLevelAction::SendState(StateEventType::RoomGuestAccess));
        row.set_read_only(!can_change);
    }

    /// Toggle the guest access.
    #[template_callback]
    async fn toggle_guest_access(&self) {
        let Some(room) = self.room() else { return };

        let row = &self.imp().guest_access;
        let guests_allowed = row.is_active();

        if room.guests_allowed() == guests_allowed {
            return;
        }

        row.set_is_loading(true);
        row.set_read_only(true);

        let guest_access = if guests_allowed {
            GuestAccess::CanJoin
        } else {
            GuestAccess::Forbidden
        };
        let content = RoomGuestAccessEventContent::new(guest_access);

        let matrix_room = room.matrix_room().clone();
        let handle = spawn_tokio!(async move { matrix_room.send_state_event(content).await });

        if let Err(error) = handle.await.unwrap() {
            error!("Could not change guest access: {error}");
            toast!(self, gettext("Could not change guest access"));
            self.update_guest_access();
        }
    }

    /// Update the title of the publish row.
    fn update_publish_title(&self) {
        let Some(room) = self.room() else {
            return;
        };

        let own_member = room.own_member();
        let server_name = own_member.user_id().server_name();

        let title = gettext_f(
            // Translators: Do NOT translate the content between '{' and '}',
            // this is a variable name.
            "Publish in the {homeserver} directory",
            &[("homeserver", server_name.as_str())],
        );
        self.imp().publish.set_title(&title);
    }

    /// Update the publish row.
    async fn update_publish(&self) {
        let Some(room) = self.room() else {
            return;
        };

        let imp = self.imp();
        let row = &imp.publish;

        // There is no clear definition of who is allowed to publish a room to the
        // directory in the Matrix spec. Let's assume it doesn't make sense unless the
        // user can change the public addresses.
        let can_change = room
            .permissions()
            .is_allowed_to(PowerLevelAction::SendState(
                StateEventType::RoomCanonicalAlias,
            ));
        row.set_read_only(!can_change);

        let matrix_room = room.matrix_room();
        let client = matrix_room.client();
        let request = get_room_visibility::v3::Request::new(matrix_room.room_id().to_owned());

        let handle = spawn_tokio!(async move { client.send(request, None).await });

        match handle.await.unwrap() {
            Ok(response) => {
                let is_published = response.visibility == Visibility::Public;
                imp.is_published.set(is_published);
                row.set_is_active(is_published);
            }
            Err(error) => {
                error!("Could not get directory visibility of room: {error}");
            }
        }

        row.set_is_loading(false);
    }

    /// Toggle whether the room is published in the room directory.
    #[template_callback]
    async fn toggle_publish(&self) {
        let Some(room) = self.room() else { return };

        let imp = self.imp();
        let row = &imp.publish;
        let publish = row.is_active();

        if imp.is_published.get() == publish {
            return;
        }

        row.set_is_loading(true);
        row.set_read_only(true);

        let visibility = if publish {
            Visibility::Public
        } else {
            Visibility::Private
        };

        let matrix_room = room.matrix_room();
        let client = matrix_room.client();
        let request =
            set_room_visibility::v3::Request::new(matrix_room.room_id().to_owned(), visibility);

        let handle = spawn_tokio!(async move { client.send(request, None).await });

        if let Err(error) = handle.await.unwrap() {
            error!("Could not change directory visibility of room: {error}");
            let text = if publish {
                gettext("Could not publish room in directory")
            } else {
                gettext("Could not unpublish room from directory")
            };
            toast!(self, text);
        }

        self.update_publish().await;
    }

    /// Update the history visibility edit button.
    fn update_history_visibility(&self) {
        let Some(room) = self.room() else {
            return;
        };

        let row = &self.imp().history_visibility;
        row.set_is_loading(false);

        let visibility = room.history_visibility();

        let text = match visibility {
            HistoryVisibilityValue::WorldReadable => {
                gettext("Anyone, even if they are not in the room")
            }
            HistoryVisibilityValue::Shared => {
                gettext("Members only, since this option was selected")
            }
            HistoryVisibilityValue::Invited => gettext("Members only, since they were invited"),
            HistoryVisibilityValue::Joined => gettext("Members only, since they joined the room"),
            HistoryVisibilityValue::Unsupported => gettext("Unsupported rule"),
        };
        row.set_selected_string(Some(text));

        let is_supported = visibility != HistoryVisibilityValue::Unsupported;
        let can_change = room
            .permissions()
            .is_allowed_to(PowerLevelAction::SendState(
                StateEventType::RoomHistoryVisibility,
            ));

        row.set_read_only(!is_supported || !can_change);
    }

    /// Set the history_visibility of the room.
    #[template_callback]
    async fn set_history_visibility(&self) {
        let Some(room) = self.room() else {
            return;
        };
        let row = &self.imp().history_visibility;

        let visibility = match row.selected() {
            0 => HistoryVisibilityValue::WorldReadable,
            1 => HistoryVisibilityValue::Shared,
            2 => HistoryVisibilityValue::Joined,
            3 => HistoryVisibilityValue::Invited,
            _ => {
                return;
            }
        };

        if room.history_visibility() == visibility {
            // Nothing to do.
            return;
        }

        row.set_is_loading(true);
        row.set_read_only(true);

        let content = RoomHistoryVisibilityEventContent::new(visibility.into());

        let matrix_room = room.matrix_room().clone();
        let handle = spawn_tokio!(async move { matrix_room.send_state_event(content).await });

        if let Err(error) = handle.await.unwrap() {
            error!("Could not change room history visibility: {error}");
            toast!(self, gettext("Could not change who can read history"));

            self.update_history_visibility();
        }
    }

    /// Update the encryption row.
    fn update_encryption(&self) {
        let Some(room) = self.room() else {
            return;
        };

        let imp = self.imp();
        let row = &imp.encryption;
        row.set_is_loading(false);

        let is_encrypted = room.is_encrypted();
        row.set_is_active(is_encrypted);

        let can_change = !is_encrypted
            && room
                .permissions()
                .is_allowed_to(PowerLevelAction::SendState(StateEventType::RoomEncryption));
        row.set_read_only(!can_change);
    }

    /// Enable encryption in the room.
    #[template_callback]
    async fn enable_encryption(&self) {
        let Some(room) = self.room() else { return };

        let imp = self.imp();
        let row = &imp.encryption;

        if room.is_encrypted() || !row.is_active() {
            // Nothing to do.
            return;
        }

        row.set_is_loading(true);
        row.set_read_only(true);

        // Ask for confirmation.
        let dialog = adw::AlertDialog::builder()
                .heading(gettext("Enable Encryption?"))
                .body(gettext("Enabling encryption will prevent new members to read the history before they arrived. This cannot be disabled later."))
                .default_response("cancel")
                .build();
        dialog.add_responses(&[
            ("cancel", &gettext("Cancel")),
            ("enable", &gettext("Enable")),
        ]);
        dialog.set_response_appearance("enable", adw::ResponseAppearance::Destructive);

        if dialog.choose_future(self).await != "enable" {
            self.update_encryption();
            return;
        };

        if room.enable_encryption().await.is_err() {
            toast!(self, gettext("Could not enable encryption"));
            self.update_encryption();
        }
    }

    /// Update the room upgrade button.
    fn update_upgrade_button(&self) {
        let Some(room) = self.room() else {
            return;
        };

        let can_upgrade = !room.is_tombstoned()
            && room
                .permissions()
                .is_allowed_to(PowerLevelAction::SendState(StateEventType::RoomTombstone));
        self.imp().upgrade_button.set_visible(can_upgrade);
    }

    /// Update the room federation row.
    fn update_federated(&self) {
        let Some(room) = self.room() else {
            return;
        };

        let subtitle = if room.federated() {
            // Translators: As in, 'Room federated'.
            gettext("Federated")
        } else {
            // Translators: As in, 'Room not federated'.
            gettext("Not federated")
        };

        self.imp().room_federated.set_subtitle(&subtitle);
    }

    /// Upgrade the room to a new version.
    #[template_callback]
    async fn upgrade(&self) {
        let Some(room) = self.room() else {
            return;
        };
        let imp = self.imp();

        // TODO: Hide upgrade button if room already upgraded?
        imp.upgrade_button.set_is_loading(true);
        let room_versions_capability = imp.capabilities.borrow().room_versions.clone();

        let Some(new_version) = confirm_room_upgrade(room_versions_capability, self).await else {
            imp.upgrade_button.set_is_loading(false);
            return;
        };

        let client = room.matrix_room().client();
        let request = upgrade_room::v3::Request::new(room.room_id().to_owned(), new_version);

        let handle = spawn_tokio!(async move { client.send(request, None).await });

        match handle.await.unwrap() {
            Ok(_) => {
                toast!(self, gettext("Room upgraded successfully"));
            }
            Err(error) => {
                error!("Could not upgrade room: {error}");
                toast!(self, gettext("Could not upgrade room"));
                imp.upgrade_button.set_is_loading(false);
            }
        }
    }
}
