import './setup.ts';

import SQL from 'sql-template-strings';

import dbConnection from './db.ts';
import type { UserRow } from './express/user.ts';
import mailer from './mailer.ts';

import { loadTranslator } from '~/server/data.ts';
import { newDate, isGrantedForUser, isPermissionArea } from '~/src/helpers.ts';
import type { PermissionArea } from '~/src/helpers.ts';

const shouldNotify = (frequency: number) => {
    if (frequency === 0) {
        return false;
    }

    if (frequency === 7) {
        return newDate().getDay() === 6; // Saturdays
    }

    return true;
};

async function notify() {
    const db = await dbConnection();

    const awaitingModeration: {
        type: PermissionArea | string & {};
        locale: string;
        c: number;
    }[] = [
        ...await db.all(SQL`
            SELECT 'nouns' as type, locale, count(*) as c
            FROM nouns
            WHERE approved = 0 AND deleted=0
            GROUP BY locale
        `),
        ...await db.all(SQL`
            SELECT 'inclusive' as type, locale, count(*) as c
            FROM inclusive
            WHERE approved = 0 AND deleted=0
            GROUP BY locale
        `),
        ...await db.all(SQL`
            SELECT 'terms' as type, locale, count(*) as c 
            FROM terms
            WHERE approved = 0 AND deleted=0
            GROUP BY locale
        `),
        ...await db.all(SQL`
            SELECT 'sources' as type, locale, count(*) as c
            FROM sources
            WHERE approved = 0 AND deleted=0
            GROUP BY locale
        `),
        ...await db.all(SQL`
            SELECT 'names' as type, locale, count(*) as c
            FROM names
            WHERE approved = 0 AND deleted=0
            GROUP BY locale
        `),
        ...await db.all(SQL`
            SELECT 'translations' as type, locale, count(*) as c
            FROM translations
            WHERE status = 0 OR status = 1
            GROUP BY locale
        `),
        ...await db.all(SQL`
            SELECT 'reports' as type, null as locale, count(*) as c
            FROM reports
            WHERE isHandled = 0
        `),
        ...await db.all(SQL`
            SELECT 'ban-proposals' as type, null as locale, (
                SELECT count(*)
                FROM ban_proposals p
                    LEFT JOIN users u ON p.userId = u.id
                WHERE u.bannedBy IS NULL
            ) as c
        `),
    ].filter((r) => r.c > 0);

    if (!awaitingModeration.length) {
        console.log('No entries awaiting moderation');
        return;
    }

    const admins = await db.all<Pick<UserRow, 'email' | 'roles' | 'adminNotifications'>[]>(SQL`
        SELECT email, roles, adminNotifications
        FROM users
        WHERE roles != '' AND roles != '*-external'
    `);

    const awaitingModerationGrouped: Record<string, { [k: string]: number }> = {};
    let count = 0;
    for (const m of awaitingModeration) {
        for (const admin of admins) {
            if ((!isPermissionArea(m.type) || isGrantedForUser(admin, m.locale, m.type)) &&
                shouldNotify(admin.adminNotifications)) {
                awaitingModerationGrouped[admin.email] ||= {};
                awaitingModerationGrouped[admin.email][`${m.locale || '*'}-${m.type}`] = m.c;
            }
        }
        count += m.c;
    }

    console.log('Entries awaiting moderation: ', count);

    for (const email in awaitingModerationGrouped) {
        if (!Object.hasOwn(awaitingModerationGrouped, email)) {
            continue;
        }
        const stats = awaitingModerationGrouped[email];
        console.log('Sending email:', email, stats);

        await mailer(email, 'notify', await loadTranslator('_'), { stats });
    }

    await db.close();
}

notify();