// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.

import {expect, test} from '@mattermost/playwright-lib';

// The notify-all confirmation modal appears once a channel has more than this many members.
const NOTIFY_ALL_THRESHOLD = 5;

const NOTIFY_ALL_TITLE = 'Confirm sending notifications to entire channel';

/**
 * @objective Verify that channel-wide mentions with uppercase letters trigger notifications and are properly highlighted.
 *
 * @precondition
 * - Two users are members of the same team
 * - Notification permissions are granted in the browser
 */
test(
    'MM-T483 triggers notification with uppercase channel-wide mention and highlights message for all users',
    {tag: '@notifications'},
    async ({pw}) => {
        // # Initialize setup and get the required users and team
        const {team, adminUser, user} = await pw.initSetup();

        // # Log in as the admin in one browser session and navigate to the "town-square" channel
        const {page: adminPage, channelsPage: adminChannelsPage} = await pw.testBrowser.login(adminUser);
        await adminChannelsPage.goto(team.name, 'town-square');
        await adminChannelsPage.toBeVisible();

        // # Stub the Notification in the admin's browser to capture notifications
        await pw.stubNotification(adminPage, 'granted');

        // # Log in as the regular user in a separate browser and navigate to the "off-topic" channel
        const {channelsPage: otherChannelsPage} = await pw.testBrowser.login(user);
        await otherChannelsPage.goto(team.name, 'off-topic');
        await otherChannelsPage.toBeVisible();

        // # Post a channel-wide mention message "@ALL" in uppercase from the user's browser
        const message = `@ALL good morning, ${team.name}!`;
        await otherChannelsPage.postMessage(message);

        // * Verify notification is received in the admin's browser with correct content
        const notifications = await pw.waitForNotification(adminPage);
        expect(notifications.length).toBe(1);

        const notification = notifications[0];
        expect(notification.title).toBe('Off-Topic');
        expect(notification.body).toBe(`@${user.username}: ${message}`);

        // The Notifications API tag must not leak the message body; the app uses the
        // opaque post ID as the tag so notifications coalesce per conversation.
        const otherLastPost = await otherChannelsPage.getLastPost();
        expect(notification.tag).toBe(await otherLastPost.getId());
        expect(notification.tag).not.toContain(message);

        expect(notification.icon).toContain('.png');
        expect(notification.requireInteraction).toBe(false);
        expect(notification.silent).toBe(false);

        // * Verify the last post as viewed by the regular user in the "off-topic" channel contains the message and is highlighted
        await otherLastPost.toContainText(message);
        await expect(otherLastPost.container.locator('.mention--highlight')).toBeVisible();
        await expect(otherLastPost.container.locator('.mention--highlight').getByText('@ALL')).toBeVisible();

        // # Navigate admin to the "off-topic" channel
        await adminChannelsPage.goto(team.name, 'off-topic');

        // * Verify the message is posted and highlighted correctly for the admin user
        const adminLastPost = await adminChannelsPage.getLastPost();
        await adminLastPost.toContainText(message);
        await expect(adminLastPost.container.locator('.mention--highlight')).toBeVisible();
        await expect(adminLastPost.container.locator('.mention--highlight').getByText('@ALL')).toBeVisible();
    },
);

/**
 * @objective Verify a channel-wide mention typed in mixed case (@channEL) is recognized as a mention,
 * prompts the notify-all confirmation, and is posted with its original casing preserved.
 */
test(
    'MM-T484 recognizes a mixed-case @channEL channel-wide mention and preserves its casing',
    {tag: '@notifications'},
    async ({pw}) => {
        const {adminClient, team, user} = await pw.initSetup();

        // # Add enough members so the channel exceeds the notify-all threshold
        for (let i = 0; i < NOTIFY_ALL_THRESHOLD; i++) {
            const extraUser = await pw.createNewUserProfile(adminClient, {prefix: 'channel-wide'});
            await adminClient.addToTeam(team.id, extraUser.id);
        }

        const {channelsPage} = await pw.testBrowser.login(user);
        await channelsPage.goto(team.name, 'town-square');
        await channelsPage.toBeVisible();

        // # Type a mixed-case channel-wide mention and send it
        const message = `@channEL mixed case mention ${pw.random.id()}`;
        await channelsPage.centerView.postCreate.writeMessage(message);
        await channelsPage.centerView.postCreate.sendMessage();

        // * Verify the notify-all confirmation modal appears (mention was recognized despite casing)
        const confirmModal = channelsPage.getConfirmModal(NOTIFY_ALL_TITLE);
        await confirmModal.toBeVisible();

        // # Confirm sending the notification
        await confirmModal.confirm();

        // * Verify the posted message preserves the mixed-case mention
        const lastPost = await channelsPage.getLastPost();
        await lastPost.toContainText(message);
    },
);

/**
 * @objective Verify an @HERE channel-wide mention typed in uppercase is recognized as a mention,
 * prompts the notify-all confirmation, and keeps its uppercase casing after switching channels.
 */
test(
    'MM-T485 recognizes an uppercase @HERE channel-wide mention and preserves its casing',
    {tag: '@notifications'},
    async ({pw}) => {
        const {adminClient, team, user} = await pw.initSetup();

        // # Add enough members so the channel exceeds the notify-all threshold
        for (let i = 0; i < NOTIFY_ALL_THRESHOLD; i++) {
            const extraUser = await pw.createNewUserProfile(adminClient, {prefix: 'channel-wide'});
            await adminClient.addToTeam(team.id, extraUser.id);
        }

        const {channelsPage} = await pw.testBrowser.login(user);
        await channelsPage.goto(team.name, 'off-topic');
        await channelsPage.toBeVisible();

        // * Verify the "Channel-wide mentions" keyword is enabled by default in notification settings
        const settingsModal = await channelsPage.openSettings();
        const notificationSettings = await settingsModal.openNotificationsTab();
        await notificationSettings.keywordsTriggerNotificationsEditButton.click();
        await expect(notificationSettings.channelWideMentionsCheckbox).toBeChecked();
        await settingsModal.close();

        // # Type an uppercase channel-wide mention and send it
        const message = `@HERE channel-wide mention ${pw.random.id()}`;
        await channelsPage.centerView.postCreate.writeMessage(message);
        await channelsPage.centerView.postCreate.sendMessage();

        // * Verify the notify-all confirmation modal appears (mention was recognized despite uppercase)
        const confirmModal = channelsPage.getConfirmModal(NOTIFY_ALL_TITLE);
        await confirmModal.toBeVisible();

        // # Confirm sending the notification
        await confirmModal.confirm();

        // * Verify the posted message preserves the uppercase mention
        const lastPost = await channelsPage.getLastPost();
        await lastPost.toContainText(message);

        // # Switch to another channel and back
        await channelsPage.sidebarLeft.goToItem('town-square');
        await channelsPage.sidebarLeft.goToItem('off-topic');

        // * Verify the uppercase mention is still shown after returning to the channel
        const postAfterSwitch = await channelsPage.getLastPost();
        await postAfterSwitch.toContainText(message);
    },
);