import SQL from 'sql-template-strings';

import { fallbackAvatar, gravatar, now } from '../src/helpers.ts';

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

const fromPayload = (payloadJson: string): string => {
    const payload = JSON.parse(payloadJson);
    return payload.avatarCopy || payload.avatar;
};

export default async (
    db: Database,
    user: Pick<UserRow, 'id' | 'username' | 'email' | 'avatarSource'> & { payload?: string },
): Promise<string> => {
    if (
        user.avatarSource &&
        process.env.NUXT_PUBLIC_CLOUDFRONT &&
        user.avatarSource.startsWith(process.env.NUXT_PUBLIC_CLOUDFRONT!)
    ) {
        return user.avatarSource;
    } else if (user.avatarSource === 'gravatar') {
        return await gravatar(user);
    } else if (user.avatarSource) {
        if (user.payload) {
            return fromPayload(user.payload);
        }
        const auth = await db.get(SQL`
            SELECT payload FROM authenticators
            WHERE type = ${user.avatarSource}
            AND userId = ${user.id}
            AND (validUntil IS NULL OR validUntil > ${now()})
        `) as { payload: string };
        if (auth) {
            return fromPayload(auth.payload);
        }
    }

    return fallbackAvatar(user);
};