const mysql = require("mysql2");
const errors = require("../node_modules/mysql2/lib/constants/errors");

class Database {
  constructor(config) {
    this.pool = mysql.createPool(config);
  }

  query(sql, values) {
    return new Promise((resolve, reject) => {
      this.pool.getConnection((err, connection) => {
        if (err) {
          reject(err);
        } else {
          connection.query(sql, values, (err, rows) => {
            if (err) {
              reject(err);
            } else {
              resolve(rows);
            }
            connection.release();
          });
        }
      });
    });
  }
}
let dbconfig;
let guildDB;
let gameDB;
let q_guild;
let q_game;

module.exports = {
  configure: (config) => {
    dbconfig = config;
  },
  query_guild: async (sql, values) => {
    if (!guildDB) {
      guildDB = new Database(dbconfig.guild);
    }
    if (!q_guild) {
      q_guild = guildDB.query.bind(guildDB);
    }
    return await q_guild(sql, values);
  },
  query_game: async (sql, values) => {
    if (!gameDB) {
      gameDB = new Database(dbconfig.game);
    }
    if (!q_game) {
      q_game = gameDB.query.bind(gameDB);
    }
    return await q_game(sql, values);
  },
  errors: errors,
};