import $ from "jquery";

import render_new_stream_user from "../templates/stream_settings/new_stream_user.hbs";
import render_new_stream_users from "../templates/stream_settings/new_stream_users.hbs";

import * as add_subscribers_pill from "./add_subscribers_pill";
import * as ListWidget from "./list_widget";
import {page_params} from "./page_params";
import * as people from "./people";
import * as settings_data from "./settings_data";
import * as stream_create_subscribers_data from "./stream_create_subscribers_data";

let pill_widget;
let all_users_list_widget;

export function get_principals() {
    return stream_create_subscribers_data.get_principals();
}

function redraw_subscriber_list() {
    all_users_list_widget.replace_list_data(stream_create_subscribers_data.sorted_user_ids());
}

function add_user_ids(user_ids) {
    stream_create_subscribers_data.add_user_ids(user_ids);
    redraw_subscriber_list();
}

function add_all_users() {
    const user_ids = stream_create_subscribers_data.get_all_user_ids();
    add_user_ids(user_ids);
}

function remove_user_ids(user_ids) {
    stream_create_subscribers_data.remove_user_ids(user_ids);
    redraw_subscriber_list();
}

function build_pill_widget({parent_container}) {
    const pill_container = parent_container.find(".pill-container");
    const get_potential_subscribers = stream_create_subscribers_data.get_potential_subscribers;

    pill_widget = add_subscribers_pill.create({pill_container, get_potential_subscribers});
}

export function create_handlers(container) {
    container.on("click", ".add_all_users_to_stream", (e) => {
        e.preventDefault();
        add_all_users();
        $(".add-user-list-filter").focus();
    });

    container.on("click", ".remove_potential_subscriber", (e) => {
        e.preventDefault();
        const elem = $(e.target);
        const user_id = Number.parseInt(elem.attr("data-user-id"), 10);
        remove_user_ids([user_id]);
    });

    function add_users({pill_user_ids}) {
        add_user_ids(pill_user_ids);
        pill_widget.clear();
    }

    add_subscribers_pill.set_up_handlers({
        get_pill_widget: () => pill_widget,
        parent_container: container,
        pill_selector: ".add_subscribers_container .input",
        button_selector: ".add_subscribers_container button.add-subscriber-button",
        action: add_users,
    });
}

export function build_widgets() {
    const add_people_container = $("#people_to_add");
    add_people_container.html(render_new_stream_users({}));

    const simplebar_container = add_people_container.find(".subscriber_list_container");

    build_pill_widget({parent_container: add_people_container});

    stream_create_subscribers_data.initialize_with_current_user();
    const current_user_id = page_params.user_id;

    all_users_list_widget = ListWidget.create($("#create_stream_subscribers"), [current_user_id], {
        name: "new_stream_add_users",
        parent_container: add_people_container,
        modifier(user_id) {
            const user = people.get_by_user_id(user_id);
            const item = {
                show_email: settings_data.show_email(),
                email: people.get_visible_email(user),
                user_id,
                full_name: user.full_name,
                is_current_user: user_id === current_user_id,
                disabled: stream_create_subscribers_data.must_be_subscribed(user_id),
            };
            return render_new_stream_user(item);
        },
        filter: {
            element: $("#people_to_add .add-user-list-filter"),
            predicate(user_id, search_term) {
                const user = people.get_by_user_id(user_id);
                return people.build_person_matcher(search_term)(user);
            },
        },
        simplebar_container,
        html_selector: (user_id) => {
            const user = people.get_by_user_id(user_id);
            return $(`#${CSS.escape("user_checkbox_" + user.user_id)}`);
        },
    });
}

export function add_user_id_to_new_stream(user_id) {
    // This is only used by puppeteer tests.
    add_user_ids([user_id]);
}