import { generateKeyPair } from "node:crypto";

const SITE_USER_ID = 1_000_000_000;

/**
 * Add a lookup table.
 * Add an actor type to "users" table.
 */

/**
 * @param { import("knex").Knex } knex
 * @returns { Promise<void> }
 */
export const up = async (knex) => {
    return knex.schema
        .createTable("lookup", (table) => {
            table.string("key").primary();
            table.string("value");
        })
        .then(async () => {
            await knex.schema.table("users", (table) => {
                table.string("actor_type");
            });

            const { pub, priv } = await (new Promise((resolve, reject) => {
                generateKeyPair("rsa", {
                    modulusLength: 2048,
                    publicKeyEncoding: {
                        type: "spki",
                        format: "pem"
                    },
                    privateKeyEncoding: {
                        type: "pkcs8",
                        format: "pem"
                    }
                }, (err, pub, priv) => {
                    if (err) reject(err);
                    else resolve({ pub, priv });
                });
            }));

            await knex("users").insert({
                id: SITE_USER_ID,
                actor_type: "Application",
                name: "site",
                nickname: process.env.blog_host,
                bio: "The site itself.",
                public_key: pub,
                private_key: priv,
                deleted: false
            });
        });
    ;
};

/**
 * @param { import("knex").Knex } knex
 * @returns { Promise<void> }
 */
export const down = async (knex) => {
    await knex("users")
        .delete()
        .where("id", SITE_USER_ID)
        ;

    return knex.schema
        .dropTableIfExists("lookup")
        .table("users", (table) => {
            table.dropColumn("actor_type");
        });
    ;
};