import {createPool} from "mysql2/promise"
import type {Pool} from "mysql2/promise";

import type { Database, ScopeRepo, StatRepo } from "../interfaces";
import MysqlDBScopes from "./scopes";


export default class MysqlDB implements Database {
  connection: Pool
  userId: string;

  private constructor(userId: string, connection: Pool) {
    this.userId = userId;
    this.connection = connection;
  }

  scopes(): ScopeRepo {
    return new MysqlDBScopes(this.connection, this.userId);
  }
  stats(scopeId: number): StatRepo {
    throw new Error("Method not implemented.");
  }

  withUser(userId: string): Database {
    return new MysqlDB(userId, this.connection);
  }

  static async connectEnv(): Promise<MysqlDB> {
    return this.connect(
      process.env.STUFFLOG3_MYSQL_HOST,
      parseInt(process.env.STUFFLOG3_MYSQL_PORT),
      process.env.STUFFLOG3_MYSQL_USERNAME,
      process.env.STUFFLOG3_MYSQL_PASSWORD,
      process.env.STUFFLOG3_MYSQL_SCHEMA,
    )
  }

  static async connect(host: string, port: number, user: string, password: string, database: string): Promise<MysqlDB> {
    const connection = await createPool({
      host, user, database, password, port,
      waitForConnections: true,
      connectionLimit: 20,
      queueLimit: 0,
    });

    return new MysqlDB("", connection);
  }
}