import SQL from 'sql-template-strings';
import { config as socialLoginConfig } from './social.ts';
import type { Database } from './db.ts';
import type { AuthenticatorRow, UserRow } from './routes/user.ts';

const upsertBanArchive = async (db: Database, type: string, value: string): Promise<void> => {
    await db.get(SQL`INSERT INTO bans (type, value) VALUES (${type}, ${value}) ON CONFLICT DO NOTHING`);
};

const removeBanArchive = async (db: Database, type: string, value: string): Promise<void> => {
    await db.get(SQL`DELETE FROM bans WHERE type = ${type} AND value = ${value};`);
};

const normaliseEmail = (email: string): string => {
    let [username, domain] = email.split('@');
    username = username.replace(/\.+/g, '');
    username = username.replace(/\+.*/, '');
    return `${username}@${domain}`.toLowerCase();
};

export const archiveBan = async (db: Database, user: Pick<UserRow, 'id'>) => {
    for (const auth of await db.all<AuthenticatorRow>(SQL`SELECT * FROM authenticators WHERE userId = ${user.id}`)) {
        const p = JSON.parse(auth.payload);
        if (auth.type === 'email') {
            await upsertBanArchive(db, 'email', normaliseEmail(p.email));
        } else if (socialLoginConfig[auth.type] !== undefined) {
            await upsertBanArchive(db, auth.type, p.id);
            if (p.email) {
                await upsertBanArchive(db, 'email', normaliseEmail(p.email));
            }
        }
    }
};

export const liftBan = async (db: Database, user: Pick<UserRow, 'id'>): Promise<void> => {
    for (const auth of await db.all<AuthenticatorRow>(SQL`SELECT * FROM authenticators WHERE userId = ${user.id}`)) {
        const p = JSON.parse(auth.payload);
        if (auth.type === 'email') {
            await removeBanArchive(db, 'email', normaliseEmail(p.email));
        } else if (socialLoginConfig[auth.type] !== undefined) {
            await removeBanArchive(db, auth.type, p.id);
            if (p.email) {
                await removeBanArchive(db, 'email', normaliseEmail(p.email));
            }
        }
    }
};

export const lookupBanArchive = async (
    db: Database,
    type: string,
    value: { email?: string, id?: string },
): Promise<boolean> => {
    let resultValue;
    if (type === 'email') {
        resultValue = normaliseEmail(value.email!);
    } else {
        resultValue = value.id;
    }

    return (await db.all(SQL`SELECT * FROM bans WHERE type=${type} and value = ${resultValue}`)).length > 0;
};