/* Module for popovers that have been ported to the modern
   TippyJS/Popper popover library from the legacy Bootstrap
   popovers system in popovers.js. */

import $ from "jquery";
import tippy, {delegate} from "tippy.js";

import render_compose_control_buttons_popover from "../templates/compose_control_buttons_popover.hbs";
import render_compose_select_enter_behaviour_popover from "../templates/compose_select_enter_behaviour_popover.hbs";
import render_left_sidebar_stream_setting_popover from "../templates/left_sidebar_stream_setting_popover.hbs";
import render_mobile_message_buttons_popover_content from "../templates/mobile_message_buttons_popover_content.hbs";

import * as channel from "./channel";
import * as common from "./common";
import * as compose_actions from "./compose_actions";
import * as giphy from "./giphy";
import * as narrow_state from "./narrow_state";
import * as popovers from "./popovers";
import * as settings_data from "./settings_data";
import {parse_html} from "./ui_util";
import {user_settings} from "./user_settings";

let left_sidebar_stream_setting_popover_displayed = false;
let compose_mobile_button_popover_displayed = false;
export let compose_enter_sends_popover_displayed = false;
let compose_control_buttons_popover_instance;

export function get_compose_control_buttons_popover() {
    return compose_control_buttons_popover_instance;
}

const default_popover_props = {
    delay: 0,
    appendTo: () => document.body,
    trigger: "click",
    interactive: true,
    hideOnClick: true,
    /* The light-border TippyJS theme is a bit of a misnomer; it
       is a popover styling similar to Bootstrap.  We've also customized
       its CSS to support Zulip's dark theme. */
    theme: "light-border",
    touch: true,
};

export function any_active() {
    return (
        left_sidebar_stream_setting_popover_displayed ||
        compose_mobile_button_popover_displayed ||
        compose_control_buttons_popover_instance ||
        compose_enter_sends_popover_displayed
    );
}

function on_show_prep(instance) {
    $(instance.popper).on("click", (e) => {
        // Popover is not hidden on click inside it unless the click handler for the
        // element explicitly hides the popover when handling the event.
        // `stopPropagation` is required here to avoid global click handlers from
        // being triggered.
        e.stopPropagation();
    });
    $(instance.popper).one("click", ".navigate_and_close_popover", (e) => {
        // Handler for links inside popover which don't need a special click handler.
        e.stopPropagation();
        instance.hide();
    });
    popovers.hide_all_except_sidebars(instance);
}

function tippy_no_propagation(target, popover_props) {
    // For some elements, such as the click target to open the message
    // actions menu, we want to avoid propagating the click event to
    // parent elements. Tippy's built-in `delegate` method does not
    // have an option to do stopPropagation, so we use this method to
    // open the Tippy popovers associated with such elements.
    //
    // A click on the click target will close the menu; for this to
    // work correctly without leaking, all callers need call
    // `instance.destroy()` inside their `onHidden` handler.
    //
    // TODO: Should we instead we wrap the caller's `onHidden` hook,
    // if any, to add `instance.destroy()`?
    $("body").on("click", target, (e) => {
        e.preventDefault();
        e.stopPropagation();
        const instance = e.currentTarget._tippy;

        if (instance) {
            instance.hide();
            return;
        }

        tippy(e.currentTarget, {
            ...default_popover_props,
            showOnCreate: true,
            ...popover_props,
        });
    });
}

export function initialize() {
    tippy_no_propagation("#streams_inline_icon", {
        onShow(instance) {
            const can_create_streams =
                settings_data.user_can_create_private_streams() ||
                settings_data.user_can_create_public_streams() ||
                settings_data.user_can_create_web_public_streams();
            on_show_prep(instance);

            if (!can_create_streams) {
                // If the user can't create streams, we directly
                // navigate them to the Manage streams subscribe UI.
                window.location.assign("#streams/all");
                // Returning false from an onShow handler cancels the show.
                return false;
            }

            instance.setContent(parse_html(render_left_sidebar_stream_setting_popover()));
            left_sidebar_stream_setting_popover_displayed = true;
            return true;
        },
        onHidden(instance) {
            instance.destroy();
            left_sidebar_stream_setting_popover_displayed = false;
        },
    });

    // compose box buttons popover shown on mobile widths.
    // We want this click event to propagate and hide other popovers
    // that could possibly obstruct user from using this popover.
    delegate("body", {
        ...default_popover_props,
        target: ".compose_mobile_button",
        placement: "top",
        onShow(instance) {
            on_show_prep(instance);
            instance.setContent(
                parse_html(
                    render_mobile_message_buttons_popover_content({
                        is_in_private_narrow: narrow_state.narrowed_to_pms(),
                    }),
                ),
            );
            compose_mobile_button_popover_displayed = true;
        },
        onMount(instance) {
            const $popper = $(instance.popper);
            $popper.one("click", ".compose_mobile_stream_button", (e) => {
                compose_actions.start("stream", {trigger: "new topic button"});
                e.stopPropagation();
                instance.hide();
            });
            $popper.one("click", ".compose_mobile_private_button", (e) => {
                compose_actions.start("private");
                e.stopPropagation();
                instance.hide();
            });
        },
        onHidden(instance) {
            // Destroy instance so that event handlers
            // are destroyed too.
            instance.destroy();
            compose_mobile_button_popover_displayed = false;
        },
    });

    // Click event handlers for it are handled in `compose_ui` and
    // we don't want to close this popover on click inside it but
    // only if user clicked outside it.
    tippy_no_propagation(".compose_control_menu_wrapper", {
        placement: "top",
        onShow(instance) {
            instance.setContent(
                parse_html(
                    render_compose_control_buttons_popover({
                        giphy_enabled: giphy.is_giphy_enabled(),
                    }),
                ),
            );
            compose_control_buttons_popover_instance = instance;
            popovers.hide_all_except_sidebars(instance);
        },
        onHidden(instance) {
            instance.destroy();
            compose_control_buttons_popover_instance = undefined;
        },
    });

    tippy_no_propagation(".enter_sends", {
        placement: "top",
        onShow(instance) {
            on_show_prep(instance);
            instance.setContent(
                parse_html(
                    render_compose_select_enter_behaviour_popover({
                        enter_sends_true: user_settings.enter_sends,
                    }),
                ),
            );
            compose_enter_sends_popover_displayed = true;
        },
        onMount(instance) {
            common.adjust_mac_shortcuts(".enter_sends_choices kbd");

            $(instance.popper).one("click", ".enter_sends_choice", (e) => {
                let selected_behaviour = $(e.currentTarget)
                    .find("input[type='radio']")
                    .attr("value");
                selected_behaviour = selected_behaviour === "true"; // Convert to bool
                user_settings.enter_sends = selected_behaviour;
                $(`.enter_sends_${!selected_behaviour}`).hide();
                $(`.enter_sends_${selected_behaviour}`).show();

                // Refocus in the content box so you can continue typing or
                // press Enter to send.
                $("#compose-textarea").trigger("focus");

                channel.patch({
                    url: "/json/settings",
                    data: {enter_sends: selected_behaviour},
                });
                e.stopPropagation();
                instance.hide();
            });
        },
        onHidden(instance) {
            instance.destroy();
            compose_enter_sends_popover_displayed = false;
        },
    });
}