import { SQL } from "bun";
import type { Token } from "./api/infos/token";

export const db = new SQL({url: process.env["URL_POSTGRESQL"]});

export const createTables = async (database: SQL): Promise<void> => {
  return await database.begin(sql => sql`
    CREATE TABLE IF NOT EXISTS tokens (
      access_token text NOT NULL,
      service text NOT NULL,
      expires bigserial NOT NULL
    )
  `);
};

export const removeExpiredTokens = async (database: SQL): Promise<number> => {
  const now = new Date();
  const deleted_tokens: Token[] = await database.begin(sql => sql`
    DELETE FROM tokens
    WHERE expires <= ${Number(now)}
    RETURNING *
  `);

  deleted_tokens.forEach(token => console.log("(DATABASE)", token.service, "token had expired on", new Date(Number(token.expires)), "and has been removed!"));
  return deleted_tokens.length;
};

export const addToken = async (database: SQL, token: {access_token: string, service: string, expires?: Date}): Promise<Token> => {
  if (!token.expires) {
    // Assume it expires in one day
    token.expires = new Date();
    token.expires.setHours(token.expires.getHours() + 24);
  }

  const returned: Token[] = await database.begin(sql => sql`
    INSERT INTO tokens (access_token, service, expires)
    VALUES (${token.access_token}, ${token.service}, ${Number(token.expires)})
    RETURNING *
  `);

  returned.forEach(token => console.log("(DATABASE)", token.service, "token has been added"));
  return returned[0];
};

export const getToken = async (database: SQL, service: string): Promise<Token> => {
  const now = new Date();
  const tokens: Token[] = await database.begin(sql => sql`
    SELECT * FROM tokens
    WHERE service = ${service}
    AND expires > ${Number(now)}
  `);
  return tokens[Math.floor(Math.random() * tokens.length)];
};