import * as input_pill from "./input_pill";
import * as pill_typeahead from "./pill_typeahead";
import * as stream_pill from "./stream_pill";
import * as user_group_pill from "./user_group_pill";
import * as user_pill from "./user_pill";

function create_item_from_text(text, current_items) {
    const funcs = [
        stream_pill.create_item_from_stream_name,
        user_group_pill.create_item_from_group_name,
        user_pill.create_item_from_email,
    ];
    for (const func of funcs) {
        const item = func(text, current_items);
        if (item) {
            return item;
        }
    }
    return undefined;
}

function get_text_from_item(item) {
    const funcs = [
        stream_pill.get_stream_name_from_item,
        user_group_pill.get_group_name_from_item,
        user_pill.get_email_from_item,
    ];
    for (const func of funcs) {
        const text = func(item);
        if (text) {
            return text;
        }
    }
    return undefined;
}

function set_up_pill_typeahead({pill_widget, pill_container, get_users}) {
    const opts = {
        user_source: get_users,
        stream: true,
        user_group: true,
        user: true,
    };
    pill_typeahead.set_up(pill_container.find(".input"), pill_widget, opts);
}

export function create({pill_container, get_potential_subscribers}) {
    const pill_widget = input_pill.create({
        container: pill_container,
        create_item_from_text,
        get_text_from_item,
    });

    function get_users() {
        const potential_subscribers = get_potential_subscribers();
        return user_pill.filter_taken_users(potential_subscribers, pill_widget);
    }

    set_up_pill_typeahead({pill_widget, pill_container, get_users});

    return pill_widget;
}

export function get_pill_user_ids(pill_widget) {
    const user_ids = user_pill.get_user_ids(pill_widget);
    const stream_user_ids = stream_pill.get_user_ids(pill_widget);
    const group_user_ids = user_group_pill.get_user_ids(pill_widget);
    return [...user_ids, ...stream_user_ids, ...group_user_ids];
}