"use strict";

const {strict: assert} = require("assert");

const {mock_module, zrequire} = require("../zjsunit/namespace");
const {run_test} = require("../zjsunit/test");
const $ = require("../zjsunit/zjquery");

const compose_actions = mock_module("compose_actions");
const people = zrequire("people");

const compose_pm_pill = zrequire("compose_pm_pill");
const input_pill = zrequire("input_pill");

let pills = {
    pill: {},
};

run_test("pills", (override) => {
    override(compose_actions, "update_placeholder_text", () => {});

    const othello = {
        user_id: 1,
        email: "othello@example.com",
        full_name: "Othello",
    };

    const iago = {
        email: "iago@zulip.com",
        user_id: 2,
        full_name: "Iago",
    };

    const hamlet = {
        email: "hamlet@example.com",
        user_id: 3,
        full_name: "Hamlet",
    };

    people.get_realm_users = () => [iago, othello, hamlet];

    const recipient_stub = $("#private_message_recipient");
    const pill_container_stub = "pill-container";
    recipient_stub.set_parent(pill_container_stub);
    let create_item_handler;

    const all_pills = new Map();

    pills.appendValidatedData = (item) => {
        const id = item.user_id;
        assert(!all_pills.has(id));
        all_pills.set(id, item);
    };
    pills.items = () => Array.from(all_pills.values());

    let text_cleared;
    pills.clear_text = () => {
        text_cleared = true;
    };

    let pills_cleared;
    pills.clear = () => {
        pills_cleared = true;
        pills = {
            pill: {},
        };
        all_pills.clear();
    };

    let appendValue_called;
    pills.appendValue = function (value) {
        appendValue_called = true;
        assert.equal(value, "othello@example.com");
        this.appendValidatedData(othello);
    };

    let get_by_email_called = false;
    people.get_by_email = (user_email) => {
        get_by_email_called = true;
        if (user_email === iago.email) {
            return iago;
        }
        if (user_email === othello.email) {
            return othello;
        }
        throw new Error(`Unknown user email ${user_email}`);
    };

    let get_by_user_id_called = false;
    people.get_by_user_id = (id) => {
        get_by_user_id_called = true;
        if (id === othello.user_id) {
            return othello;
        }
        if (id === hamlet.user_id) {
            return hamlet;
        }
        throw new Error(`Unknown user ID ${id}`);
    };

    function test_create_item(handler) {
        (function test_rejection_path() {
            const item = handler(othello.email, pills.items());
            assert(get_by_email_called);
            assert.equal(item, undefined);
        })();

        (function test_success_path() {
            get_by_email_called = false;
            const res = handler(iago.email, pills.items());
            assert(get_by_email_called);
            assert.equal(typeof res, "object");
            assert.equal(res.user_id, iago.user_id);
            assert.equal(res.display_value, iago.full_name);
        })();
    }

    function input_pill_stub(opts) {
        assert.equal(opts.container, pill_container_stub);
        create_item_handler = opts.create_item_from_text;
        assert(create_item_handler);
        return pills;
    }

    input_pill.__Rewire__("create", input_pill_stub);

    // We stub the return value of input_pill.create(), manually add widget functions to it.
    pills.onPillCreate = (callback) => {
        // Exercise our callback for line coverage. It is
        // just compose_actions.update_placeholder_text(),
        // which we override.
        callback();
    };
    pills.onPillRemove = (callback) => {
        callback();
    };

    compose_pm_pill.initialize();
    assert(compose_pm_pill.widget);

    compose_pm_pill.set_from_typeahead(othello);
    compose_pm_pill.set_from_typeahead(hamlet);

    const user_ids = compose_pm_pill.get_user_ids();
    assert.deepEqual(user_ids, [othello.user_id, hamlet.user_id]);

    const user_ids_string = compose_pm_pill.get_user_ids_string();
    assert.equal(user_ids_string, "1,3");

    const emails = compose_pm_pill.get_emails();
    assert.equal(emails, "othello@example.com,hamlet@example.com");

    const persons = [othello, iago, hamlet];
    const items = compose_pm_pill.filter_taken_users(persons);
    assert.deepEqual(items, [{email: "iago@zulip.com", user_id: 2, full_name: "Iago"}]);

    test_create_item(create_item_handler);

    compose_pm_pill.set_from_emails("othello@example.com");
    assert(compose_pm_pill.widget);

    assert(get_by_user_id_called);
    assert(pills_cleared);
    assert(appendValue_called);
    assert(text_cleared);
});

run_test("has_unconverted_data", () => {
    compose_pm_pill.__Rewire__("widget", {
        is_pending: () => true,
    });

    // If the pill itself has pending data, we have unconverted
    // data.
    assert.equal(compose_pm_pill.has_unconverted_data(), true);

    compose_pm_pill.__Rewire__("widget", {
        is_pending: () => false,
        items: () => [{user_id: 99}],
    });

    // Our pill is complete and all items contain user_id, so
    // we do NOT have unconverted data.
    assert.equal(compose_pm_pill.has_unconverted_data(), false);

    compose_pm_pill.__Rewire__("widget", {
        is_pending: () => false,
        items: () => [{user_id: 99}, {email: "random@mit.edu"}],
    });

    // One of our items only knows email (as in a bridge-with-zephyr
    // scenario where we might not have registered the user yet), so
    // we have some unconverted data.
    assert.equal(compose_pm_pill.has_unconverted_data(), true);
});