const fs = require('fs');
let mysql_conn = require('./mysql_conn.js');

async function sessionNumber(db_info, whatsappId, number, dirSessionsApp) {

    let numberSession = 1

    let whatsappName

    const dirSessionsNumberAppDirectories = fs.readdirSync(dirSessionsApp, { withFileTypes: true })
        .filter((item) => item.isDirectory() && item.name.includes(`${number}`))
        .map((item) => item.name);

    if (dirSessionsNumberAppDirectories.length > 0) {

        let session_number = dirSessionsNumberAppDirectories.map((e) => +e.split('_')[2])

        numberSession = Math.max(...session_number) + 1

        console.log('Number session: ', numberSession)


        if (numberSession > 4) {
            res.status(400).json({ message: 'Cannot create more than 4 sessions from the same number' })
            return
        }

    }


    let db = db_info.filter((e) => e.client_url == client_url)


    if (db && db.length > 0) {

        db = db[0].db_conf

        let whatsName

        const whatsapp = await new Promise((resolve, reject) => {

            mysql_conn(db).query("SELECT name from Whatsapps where id = ?", [whatsappId], (err, result) => {

                if (err) {
                    reject(err)
                }
                else {
                    resolve(result)
                }
            });

        })

        if (whatsapp[0]["name"].split('->').length > 0) {
            whatsName = `${whatsapp[0]["name"].split('->')[0]} -> S${numberSession}`
        }
        else {
            whatsName = `${whatsapp[0]["name"]} -> S${numberSession}`
        }

        console.log('whatsName: ', whatsName)

        console.log(`url: ${process.env.BASE_URL}:${appPort}\n whatsname: ${whatsName}\n whatsappId: ${whatsappId}`)

        // await new Promise((resolve, reject) => {
        //     mysql_conn(db).query("UPDATE Whatsapps SET name = ? where id = ?", [ `${whatsName}`, whatsappId],

        //         function (err, result) {
        //             if (err) {
        //                 reject(err)
        //                 console.log("===> ERROR: " + err);
        //             }
        //             else {
        //                 resolve(result)
        //                 console.log('RESULT: ', result)
        //             }
        //             // else
        //             //     console.log('myslq result: ', result);
        //         });
        // })

        whatsappName = `${number} - s${numberSession}`

        console.log('-------------- numberSession', numberSession)

        if (whatsapp.length > 0) {

            if (whatsapp[0]['name'].split(' ').length > 0) {

                whatsappName = `${whatsapp[0]['name'].split(' ')[0]} - S${numberSession}`

            }

        }


    }

    console.log('---------> whatsappName', whatsappName)

    return whatsappName

}

module.exports = sessionNumber