var mysql = require('mysql');
const env = process.env.NODE_ENV || 'development';
const config = require(__dirname + '/../../config/config.json')[env];

var pool  = mysql.createPool({
  connectionLimit : 20,
  host     : config.host,
  user     : config.username,
  password : config.password,
  database : config.database
});
pool.on('acquire', function (connection) {
    console.log('Connection %d acquired', connection.threadId);
  });

exports.findByName = function(deviceName, cb) {
    process.nextTick(function() {
        console.log("findByName(" +deviceName + "," + days +")" );
        pool.getConnection(function(err, con) {
        if (err) throw err; // not connected!
        con.query("SELECT * FROM devices WHERE (name=? OR ? IS NULL) )", [deviceName, deviceName], (err, data) => {
            con.release();
            if (!err) {
                cb(null, data);
            } else {
                cb(new Error('SQL Error: ' + err));
            }
        });
        });
    });
}

exports.insert = function(deviceName, baseurl, apikey,lastseen, cb){
    var params = [deviceName, baseurl, apikey,lastseen];
    let sql = `INSERT INTO devices (name,baseurl,apikey,lastseen,timestamp)
    VALUES (?,?,?,?,NOW());`;
    pool.getConnection(function(err, con) {
      if (err) throw err; // not connected!
        con.query(sql, params,(err, r) => {
            con.release();
            //if(!cb) {return;}
            if (err) {
                console.log("error: ", err);
                cb && cb(new Error('SQL Error: ' + err));
            }else{
                console.log("inserted record: ", { id:  r.insertId});
                cb && cb(null, { id: r.insertId, ...params });
            }
        });
    });
}

exports.update = function(deviceName, baseurl, cb){
    var params = [deviceName, baseurl, apikey,lastseen];
    let sql = `INSERT INTO devices (name,baseurl,apikey,lastseen,timestamp)
    VALUES (?,?,?,?,NOW());`;
    pool.getConnection(function(err, con) {
      if (err) throw err; // not connected!
        con.query(sql, params,(err, r) => {
            con.release();
            //if(!cb) {return;}
            if (err) {
                console.log("error: ", err);
                cb && cb(new Error('SQL Error: ' + err));
            }else{
                console.log("inserted record: ", { id:  r.insertId});
                cb && cb(null, { id: r.insertId, ...params });
            }
        });
    });
}