const express = require('express');
const bodyparser = require('body-parser');
const dotenv = require('dotenv');
dotenv.config({ path: '.env' });
const copyFolder = require('./helpers/copyFolder')
const createDir = require('./helpers/createDir')
const createFile = require('./helpers/createFile')
const path = require('path');
const db_info = require('./db_conn')
const fs = require('fs');
let mysql_conn = require('./helpers/mysql_conn.js');
const { exec, spawn } = require("child_process");


const app = express();

app.use(bodyparser.json());

app.get('/', function (req, res) { return res.send('Express + TypeScript Server'); });

app.post('/api/session', async function (req, res) {

    const { app_name, whatsappId, client_url, number } = req.body

    console.log('__dirname: ', path.join(__dirname, '..', app_name))

    console.log(app_name, whatsappId, client_url)

    const sessionsPath = path.join(__dirname, '..', 'sessions')

    const directoriesInDIrectory = fs.readdirSync(sessionsPath, { withFileTypes: true })
        .filter((item) => item.isDirectory())
        .map((item) => item.name);

    console.log('directoriesInDIrectory: ', directoriesInDIrectory)

    const dirExist = directoriesInDIrectory.filter((e) => e == app_name)

    let dirSessionsApp = path.join(sessionsPath, app_name)

    if (dirExist.length == 0) {

        let create = createDir(dirSessionsApp)

        if (!create) {

            res.status(500).json({ message: 'Cannot create the directory path!' })
            return

        }
    }

    let appPort = []



    let existSubDir = false

    for (let i = 0; i < directoriesInDIrectory.length; i++) {

        console.log('directoriesInDIrectory[i]', directoriesInDIrectory[i])

        const subDir = fs.readdirSync(path.join(sessionsPath, directoriesInDIrectory[i]), { withFileTypes: true })
            .filter((item) => item.isDirectory())
            .map((item) => item.name);

        for (let x = 0; x < subDir.length; x++) {

            console.log('subdir: ', subDir[x])

            let whatsId = subDir[x].split('_')[0]

            if (whatsId == whatsappId) { 

                let currPath = path.join(sessionsPath, directoriesInDIrectory[i], subDir[x])

                exec(`pm2 delete ${subDir[x]} && pm2 save`, { cwd: currPath }, (error, stdout, stderr) => {
                    if (error) {
                        console.log(`error: ${error.message}`);
                        return;
                    }
                    if (stderr) {
                        console.log(`stderr: ${stderr}`);
                        return;
                    }
                    console.log(`stdout: ${stdout}`);
                });

                console.log('PATH: ', path.join(sessionsPath, directoriesInDIrectory[i], subDir[x]))

                let oldNumber = subDir[x].split('_')[1]
                let sessionNum = subDir[x].split('_')[2]
                let sessionPort = subDir[x].split('_')[3]
                let newSessionAppName = `${whatsId}_${number}_${sessionNum}_${sessionPort}`

            
                let newPath = path.join(sessionsPath, directoriesInDIrectory[i], newSessionAppName)

                try {
                    fs.renameSync(currPath, newPath)
                    console.log("Successfully renamed the directory.")
                } catch (err) {
                    console.log(err)
                }


                const data = fs.readFileSync(path.join(`${newPath}`, '.env'), 'utf-8');

                console.log('Data: ', data)

                const newValue = data.replace(`MOBILEUID=${oldNumber}`, `MOBILEUID=${number}`)

                fs.writeFileSync(path.join(`${newPath}`, '.env'), newValue, 'utf-8'); 

                res.send('ok')
                return


            }

            appPort.push(+subDir[x].split('_')[3])

            existSubDir = true

        }

    }

    appPort = existSubDir ? Math.max(...appPort) + 1 : process.env.PORT_START

    console.log('new port: ', appPort)



    let dirSessionAppName

    let numberSession = 1

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

    console.log('dirSessionsNumberAppDirectories', dirSessionsNumberAppDirectories, ' | dirSessionsApp: ', dirSessionsApp)


    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
        }


    }

    dirSessionAppName = `${whatsappId}_${number}_${numberSession}_${appPort}`



    destDir = path.join(dirSessionsApp, dirSessionAppName)

    originDir = path.join(__dirname, '..', 'whats')

    copyFolder(originDir, destDir)

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

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

        db = db[0].db_conf

        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)
                }
            });

        })


        let whatsName

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


        mysql_conn(db).query("UPDATE Whatsapps SET url = ?, name = ? where id = ?", [`${process.env.BASE_URL}:${appPort}`, `${whatsName}`, whatsappId],

            function (err, result) {
                if (err)
                    console.log("ERROR: " + err);

                // else
                //     console.log('myslq result: ', result);
            });

        let 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('whatsapp: ', whatsapp)
        console.log("whatsapp[0]['name']: ", whatsapp[0]['name'])

        const keys = Object.keys(db);

        var stream = fs.createWriteStream(path.join(destDir, '.env'));
        stream.once('open', function (fd) {
            stream.write("# NUMBER AND NAME THAT WILL BE DISPLAYED ON CONSOLE\n");
            stream.write(`MOBILEUID=${number}\n`);
            stream.write(`MOBILENAME=${whatsappName}\n`);
            stream.write("\n");

            stream.write("# PORT NUMBER FOR THIS API\n");
            stream.write(`PORT=${appPort}\n`);
            stream.write("\n");

            stream.write("# URL FROM THE OMNIHIT BACKEND API\n");
            stream.write(`CLIENT_URL=${client_url}\n`);
            stream.write("\n");

            stream.write("# OMNIHIT DATABASE\n");
            keys.forEach((key, index) => {
                stream.write(`${key}=${db[key]}\n`);
            });
            stream.write("\n");

            stream.write(`# WHATSAPP ID OF THE TABLE Whatsapps FROM THE OMNIHIT DATABASE\n`);
            stream.write(`WHATSAPP_ID=${whatsappId}`);

            stream.end();
        });



        console.log('----------------destDir: ', destDir)


        // exec(`npm install`, { cwd: destDir }, (error, stdout, stderr) => {
        //     if (error) {
        //         console.log(`error: ${error.message}`);
        //         return;
        //     }
        //     if (stderr) {
        //         console.log(`stderr: ${stderr}`);
        //         return;
        //     }
        //     console.log(`stdout: ${stdout}`);
        // });

        // exec(`npm install && pm2 start app.js --name ${dirSessionAppName} && pm2 save`, { cwd: destDir }, (error, stdout, stderr) => {
        //     if (error) {
        //         console.log(`error: ${error.message}`);
        //         return;
        //     }
        //     if (stderr) {
        //         console.log(`stderr: ${stderr}`);
        //         return;
        //     }
        //     console.log(`stdout: ${stdout}`);
        // });



    }

    res.send("OK");

});

app.post('/api/session/edit', async function (req, res) {

    const { app_name, whatsappId, client_url, number } = req.body

})


app.listen(process.env.PORT || 8003, function () {
    console.log("\u26A1[server]: Server is running at Port ::: " + process.env.PORT || 8003);
});

process.on('uncaughtException', function (err) {
    console.error(' ');
    console.error('----- ' + (new Date).toUTCString() + ' ----------------------------------')
    console.error('Erro uncaughtException: ', err.message)
    console.error(err.stack)
    console.error(' ');
    return
});