import $ from "jquery";
import assert from "minimalistic-assert";

import render_inline_decorated_stream_name from "../templates/inline_decorated_stream_name.hbs";
import render_move_topic_to_stream from "../templates/move_topic_to_stream.hbs";
import render_stream_sidebar_actions from "../templates/stream_sidebar_actions.hbs";

import * as blueslip from "./blueslip";
import * as browser_history from "./browser_history";
import * as compose_actions from "./compose_actions";
import * as composebox_typeahead from "./composebox_typeahead";
import * as dialog_widget from "./dialog_widget";
import * as dropdown_widget from "./dropdown_widget";
import * as hash_util from "./hash_util";
import {$t, $t_html} from "./i18n";
import * as message_edit from "./message_edit";
import * as message_lists from "./message_lists";
import * as popover_menus from "./popover_menus";
import {left_sidebar_tippy_options} from "./popover_menus";
import * as settings_data from "./settings_data";
import * as stream_color from "./stream_color";
import * as stream_data from "./stream_data";
import * as stream_settings_api from "./stream_settings_api";
import * as stream_settings_components from "./stream_settings_components";
import * as stream_settings_ui from "./stream_settings_ui";
import * as sub_store from "./sub_store";
import * as ui_report from "./ui_report";
import * as ui_util from "./ui_util";
import * as unread_ops from "./unread_ops";
import * as util from "./util";
// In this module, we manage stream popovers
// that pop up from the left sidebar.
let stream_popover_instance = null;
let stream_widget_value;

function get_popover_menu_items(sidebar_elem) {
    if (!sidebar_elem) {
        blueslip.error("Trying to get menu items when action popover is closed.");
        return undefined;
    }

    const $popover = $(sidebar_elem.popper);
    if (!$popover) {
        blueslip.error("Cannot find popover data for stream sidebar menu.");
        return undefined;
    }

    return $("li:not(.divider):visible > a", $popover);
}

export function stream_sidebar_menu_handle_keyboard(key) {
    const items = get_popover_menu_items(stream_popover_instance);
    popover_menus.popover_items_handle_keyboard(key, items);
}

export function elem_to_stream_id($elem) {
    const stream_id = Number.parseInt($elem.attr("data-stream-id"), 10);

    if (stream_id === undefined) {
        blueslip.error("could not find stream id");
    }

    return stream_id;
}

export function is_open() {
    return Boolean(stream_popover_instance);
}

export function hide_stream_popover() {
    if (is_open()) {
        ui_util.hide_left_sidebar_menu_icon();
        stream_popover_instance.destroy();
        stream_popover_instance = null;
    }
}

function stream_popover_sub(e) {
    const $elem = $(e.currentTarget).parents("ul");
    const stream_id = elem_to_stream_id($elem);
    const sub = sub_store.get(stream_id);
    if (!sub) {
        blueslip.error("Unknown stream", {stream_id});
        return undefined;
    }
    return sub;
}

function build_stream_popover(opts) {
    const {elt, stream_id} = opts;

    // This will allow the user to close the popover by clicking
    // on the reference element if the popover is already open.
    if (stream_popover_instance?.reference === elt) {
        return;
    }

    const content = render_stream_sidebar_actions({
        stream: sub_store.get(stream_id),
    });

    popover_menus.toggle_popover_menu(elt, {
        // Add a delay to separate `hideOnClick` and `onShow` so that
        // `onShow` is called after `hideOnClick`.
        // See https://github.com/atomiks/tippyjs/issues/230 for more details.
        delay: [100, 0],
        ...left_sidebar_tippy_options,
        onCreate(instance) {
            stream_popover_instance = instance;
            const $popover = $(instance.popper);
            $popover.addClass("stream-popover-root");
            instance.setContent(ui_util.parse_html(content));
        },
        onMount(instance) {
            const $popper = $(instance.popper);
            ui_util.show_left_sidebar_menu_icon(elt);

            // Stream settings
            $popper.on("click", ".open_stream_settings", (e) => {
                const sub = stream_popover_sub(e);
                hide_stream_popover();

                const stream_edit_hash = hash_util.stream_edit_url(sub, "general");
                browser_history.go_to_location(stream_edit_hash);
            });

            // Pin/unpin
            $popper.on("click", ".pin_to_top", (e) => {
                const sub = stream_popover_sub(e);
                hide_stream_popover();
                stream_settings_ui.toggle_pin_to_top_stream(sub);
                e.stopPropagation();
            });

            // Mark all messages in stream as read
            $popper.on("click", ".mark_stream_as_read", (e) => {
                const sub = stream_popover_sub(e);
                hide_stream_popover();
                unread_ops.mark_stream_as_read(sub.stream_id);
                e.stopPropagation();
            });

            // Mute/unmute
            $popper.on("click", ".toggle_stream_muted", (e) => {
                const sub = stream_popover_sub(e);
                hide_stream_popover();
                stream_settings_api.set_stream_property(sub, {
                    property: "is_muted",
                    value: !sub.is_muted,
                });
                e.stopPropagation();
            });

            // New topic in stream menu
            $popper.on("click", ".popover_new_topic_button", (e) => {
                const sub = stream_popover_sub(e);
                hide_stream_popover();

                compose_actions.start({
                    message_type: "stream",
                    trigger: "popover new topic button",
                    stream_id: sub.stream_id,
                    topic: "",
                });
                e.preventDefault();
                e.stopPropagation();
            });

            // Unsubscribe
            $popper.on("click", ".popover_sub_unsub_button", (e) => {
                const sub = stream_popover_sub(e);
                hide_stream_popover();
                stream_settings_components.sub_or_unsub(sub);
                e.preventDefault();
                e.stopPropagation();
            });

            // Choose a different color.
            $popper.on("click", ".choose_stream_color", (e) => {
                const $popover = $(e.target).closest(".streams_popover");
                const $colorpicker = $popover.find(".colorpicker-container").find(".colorpicker");
                $(".colorpicker-container").show();
                $colorpicker.spectrum("destroy");
                $colorpicker.spectrum(stream_color.sidebar_popover_colorpicker_options_full);
                // In theory this should clean up the old color picker,
                // but this seems a bit flaky -- the new colorpicker
                // doesn't fire until you click a button, but the buttons
                // have been hidden.  We work around this by just manually
                // fixing it up here.
                $colorpicker.parent().find(".sp-container").removeClass("sp-buttons-disabled");
                $(e.target).hide();
                e.stopPropagation();
            });
        },
        onHidden() {
            hide_stream_popover();
        },
    });
}

async function get_message_placement_from_server(
    current_stream_id,
    topic_name,
    current_message_id,
) {
    return new Promise((resolve) => {
        message_edit.is_message_oldest_or_newest(
            current_stream_id,
            topic_name,
            current_message_id,
            (is_oldest, is_newest) => {
                if (is_oldest) {
                    resolve("first");
                } else if (is_newest) {
                    resolve("last");
                } else {
                    resolve("intermediate");
                }
            },
        );
    });
}

async function get_message_placement_in_conversation(
    current_stream_id,
    topic_name,
    current_message_id,
) {
    assert(message_lists.current !== undefined);
    // First we check if the placement of the message can be determined
    // in the current message list. This allows us to avoid a server call
    // in most cases.

    if (message_lists.current.data.filter.supports_collapsing_recipients()) {
        // Next we check if we are in a conversation view. If we are
        // in a conversation view, we check if the message is the
        // first or the last message in the current view. If not, we
        // can conclude that the message is an intermediate message.
        //
        // It's safe to assume message_lists.current.data is non-empty, because
        // current_message_id must be present in it.
        if (message_lists.current.data.filter.is_conversation_view()) {
            if (
                message_lists.current.data.fetch_status.has_found_oldest() &&
                message_lists.current.data.first().id === current_message_id
            ) {
                return "first";
            } else if (
                message_lists.current.data.fetch_status.has_found_newest() &&
                message_lists.current.data.last().id === current_message_id
            ) {
                return "last";
            }
            return "intermediate";
        }

        // If we are not in a conversation view, but still know
        // the view contains the entire conversation, we check if
        // we can find the adjacent messages in the current view
        // through which we can determine if the message is an
        // intermediate message or not.
        const msg_list = message_lists.current.data.all_messages();
        let found_newer_matching_message = false;
        let found_older_matching_message = false;
        const current_dict = {
            stream_id: current_stream_id,
            topic: topic_name,
        };

        for (let i = msg_list.length - 1; i >= 0; i -= 1) {
            const message = msg_list[i];
            const message_dict = {
                stream_id: message.stream_id,
                topic: message.topic,
            };

            if (util.same_stream_and_topic(current_dict, message_dict)) {
                if (message.id > current_message_id) {
                    found_newer_matching_message = true;
                } else if (message.id < current_message_id) {
                    found_older_matching_message = true;
                }

                if (found_newer_matching_message && found_older_matching_message) {
                    return "intermediate";
                }
            }
        }

        if (
            message_lists.current.data.fetch_status.has_found_newest() &&
            !found_newer_matching_message
        ) {
            return "last";
        }
        if (
            message_lists.current.data.fetch_status.has_found_oldest() &&
            !found_older_matching_message
        ) {
            return "first";
        }
    }

    // In case we are unable to determine the placement of the message
    // in the current message list, we make a server call to determine
    // the placement.
    return await get_message_placement_from_server(
        current_stream_id,
        topic_name,
        current_message_id,
    );
}

export async function build_move_topic_to_stream_popover(
    current_stream_id,
    topic_name,
    only_topic_edit,
    message,
) {
    const current_stream_name = sub_store.maybe_get_stream_name(current_stream_id);
    const args = {
        topic_name,
        current_stream_id,
        notify_new_thread: message_edit.notify_new_thread_default,
        notify_old_thread: message_edit.notify_old_thread_default,
        from_message_actions_popover: message !== undefined,
        only_topic_edit,
    };

    // When the modal is opened for moving the whole topic from left sidebar,
    // we do not have any message object and so we disable the stream input
    // based on the move_messages_between_streams_policy setting and topic
    // input based on edit_topic_policy. In other cases, message object is
    // available and thus we check the time-based permissions as well in the
    // below if block to enable or disable the stream and topic input.
    let disable_stream_input = !settings_data.user_can_move_messages_between_streams();
    args.disable_topic_input = !settings_data.user_can_move_messages_to_another_topic();

    let modal_heading;
    if (only_topic_edit) {
        modal_heading = $t_html({defaultMessage: "Rename topic"});
    } else {
        modal_heading = $t_html({defaultMessage: "Move topic"});
    }

    if (message !== undefined) {
        modal_heading = $t_html({defaultMessage: "Move messages"});
        // We disable topic input only for modal is opened from the message actions
        // popover and not when moving the whole topic from left sidebar. This is
        // because topic editing permission depend on message and we do not have
        // any message object when opening the modal and the first message of
        // topic is fetched from the server after clicking submit.
        // Though, this will be changed soon as we are going to make topic
        // edit permission independent of message.

        // We potentially got to this function by clicking a button that implied the
        // user would be able to move their message.  Give a little bit of buffer in
        // case the button has been around for a bit, e.g. we show the
        // move_message_button (hovering plus icon) as long as the user would have
        // been able to click it at the time the mouse entered the message_row. Also
        // a buffer in case their computer is slow, or stalled for a second, etc
        // If you change this number also change edit_limit_buffer in
        // zerver.actions.message_edit.check_update_message
        const move_limit_buffer = 5;
        args.disable_topic_input = !message_edit.is_topic_editable(message, move_limit_buffer);
        disable_stream_input = !message_edit.is_stream_editable(message, move_limit_buffer);
        args.message_placement = await get_message_placement_in_conversation(
            current_stream_id,
            topic_name,
            message.id,
        );
    }

    function get_params_from_form() {
        return Object.fromEntries(
            $("#move_topic_form")
                .serializeArray()
                .map(({name, value}) => [name, value]),
        );
    }

    function update_submit_button_disabled_state(select_stream_id) {
        const {current_stream_id, new_topic_name, old_topic_name} = get_params_from_form();

        // Unlike most topic comparisons in Zulip, we intentionally do
        // a case-sensitive comparison, since adjusting the
        // capitalization of a topic is a valid operation.
        // new_topic_name can be undefined when the new topic input is
        // disabled in case when user does not have permission to edit
        // topic and thus submit button is disabled if stream is also
        // not changed.
        $("#move_topic_modal .dialog_submit_button")[0].disabled =
            Number.parseInt(current_stream_id, 10) === Number.parseInt(select_stream_id, 10) &&
            (new_topic_name === undefined || new_topic_name.trim() === old_topic_name.trim());
    }

    function move_topic() {
        const params = get_params_from_form();

        const {old_topic_name} = params;
        let select_stream_id;
        if (only_topic_edit) {
            select_stream_id = undefined;
        } else {
            select_stream_id = stream_widget_value;
        }

        let {
            current_stream_id,
            new_topic_name,
            send_notification_to_new_thread,
            send_notification_to_old_thread,
        } = params;
        send_notification_to_new_thread = send_notification_to_new_thread === "on";
        send_notification_to_old_thread = send_notification_to_old_thread === "on";
        current_stream_id = Number.parseInt(current_stream_id, 10);
        select_stream_id = Number.parseInt(select_stream_id, 10);

        if (new_topic_name !== undefined) {
            // new_topic_name can be undefined when the new topic input is disabled when
            // user does not have permission to edit topic.
            new_topic_name = new_topic_name.trim();
        }
        if (old_topic_name.trim() === new_topic_name) {
            // We use `undefined` to tell the server that
            // there has been no change in the topic name.
            new_topic_name = undefined;
        }
        if (select_stream_id === current_stream_id) {
            // We use `undefined` to tell the server that
            // there has been no change in stream. This is
            // important for cases when changing stream is
            // not allowed or when changes other than
            // stream-change has been made.
            select_stream_id = undefined;
        }

        let propagate_mode = "change_all";
        if (message !== undefined) {
            // We already have the message_id here which means that modal is opened using
            // message popover.
            propagate_mode = $("#move_topic_modal select.message_edit_topic_propagate").val();
            message_edit.move_topic_containing_message_to_stream(
                message.id,
                select_stream_id,
                new_topic_name,
                send_notification_to_new_thread,
                send_notification_to_old_thread,
                propagate_mode,
            );
            return;
        }

        dialog_widget.show_dialog_spinner();
        message_edit.with_first_message_id(
            current_stream_id,
            old_topic_name,
            (message_id) => {
                message_edit.move_topic_containing_message_to_stream(
                    message_id,
                    select_stream_id,
                    new_topic_name,
                    send_notification_to_new_thread,
                    send_notification_to_old_thread,
                    propagate_mode,
                );
            },
            (xhr) => {
                dialog_widget.hide_dialog_spinner();
                ui_report.error(
                    $t_html({defaultMessage: "Error moving topic"}),
                    xhr,
                    $("#move_topic_modal #dialog_error"),
                );
            },
        );
    }

    function set_stream_topic_typeahead() {
        const $topic_input = $("#move_topic_form .move_messages_edit_topic");
        const new_stream_id = Number(stream_widget_value, 10);
        const new_stream_name = sub_store.get(new_stream_id).name;
        $topic_input.data("typeahead").unlisten();
        composebox_typeahead.initialize_topic_edit_typeahead($topic_input, new_stream_name, false);
    }

    function render_selected_stream() {
        const stream_id = Number.parseInt(stream_widget_value, 10);
        const stream = stream_data.get_sub_by_id(stream_id);
        if (stream === undefined) {
            $("#move_topic_to_stream_widget .dropdown_widget_value").text(
                $t({defaultMessage: "Select a stream"}),
            );
        } else {
            $("#move_topic_to_stream_widget .dropdown_widget_value").html(
                render_inline_decorated_stream_name({stream, show_colored_icon: true}),
            );
        }
    }

    function move_topic_on_update(event, dropdown) {
        stream_widget_value = $(event.currentTarget).attr("data-unique-id");

        update_submit_button_disabled_state(stream_widget_value);
        set_stream_topic_typeahead();
        render_selected_stream();

        dropdown.hide();
        event.preventDefault();
        event.stopPropagation();
    }

    function move_topic_post_render() {
        $("#move_topic_modal .dialog_submit_button").prop("disabled", true);

        const $topic_input = $("#move_topic_form .move_messages_edit_topic");
        composebox_typeahead.initialize_topic_edit_typeahead(
            $topic_input,
            current_stream_name,
            false,
        );

        if (only_topic_edit) {
            // Set select_stream_id to current_stream_id since we user is not allowed
            // to edit stream in topic-edit only UI.
            const select_stream_id = current_stream_id;
            $topic_input.on("input", () => {
                update_submit_button_disabled_state(select_stream_id);
            });
            return;
        }

        stream_widget_value = current_stream_id;
        const streams_list_options = () =>
            stream_data.get_options_for_dropdown_widget().filter((stream) => {
                if (stream.stream_id === current_stream_id) {
                    return true;
                }
                return stream_data.can_post_messages_in_stream(stream);
            });

        new dropdown_widget.DropdownWidget({
            widget_name: "move_topic_to_stream",
            get_options: streams_list_options,
            item_click_callback: move_topic_on_update,
            $events_container: $("#move_topic_modal"),
            tippy_props: {
                // Overlap dropdown search input with stream selection button.
                placement: "bottom-start",
                offset: [0, -30],
            },
        }).setup();

        render_selected_stream();
        $("#move_topic_to_stream_widget").prop("disabled", disable_stream_input);
        $("#move_topic_modal .move_messages_edit_topic").on("input", () => {
            update_submit_button_disabled_state(stream_widget_value);
        });
    }

    function focus_on_move_modal_render() {
        if (!args.disable_topic_input) {
            ui_util.place_caret_at_end($(".move_messages_edit_topic")[0]);
        }
    }

    dialog_widget.launch({
        html_heading: modal_heading,
        html_body: render_move_topic_to_stream(args),
        html_submit_button: $t_html({defaultMessage: "Confirm"}),
        id: "move_topic_modal",
        on_click: move_topic,
        loading_spinner: true,
        on_shown: focus_on_move_modal_render,
        post_render: move_topic_post_render,
    });
}

export function initialize() {
    $("#stream_filters").on("click", ".stream-sidebar-menu-icon", (e) => {
        const elt = e.currentTarget;
        const $stream_li = $(elt).parents("li");
        const stream_id = elem_to_stream_id($stream_li);

        build_stream_popover({
            elt,
            stream_id,
        });

        e.stopPropagation();
    });

    $("body").on("click", ".inbox-stream-menu", (e) => {
        const elt = e.currentTarget;
        const stream_id = Number.parseInt($(elt).attr("data-stream-id"), 10);

        build_stream_popover({
            elt,
            stream_id,
        });

        e.stopPropagation();
    });
}