const express = require('express')
const fs = require('fs')
const db = require('./app/db')
const app = express()
const cors = require("cors");
const multer = require('multer')

const videoFileMap2={
    'cdn':'videos/v1.mp4',
    'generate-pass':'videos/v2.mp4',
    'get-post':'videos/v3.mp4',
    'tt1':'/opt/wrenchboard/TEST/COMMON/MEDIA/What Is Single Sign-on (SSO)？ How It Works-(1080p25).mp4',
    'tt2':'/opt/wrenchboard/TEST/COMMON/MEDIA/What is RabbitMQ？-(1080p30).mp4',
    'tt3':'/opt/wrenchboard/TEST/COMMON/MEDIA/What is CORS？-(1080p50).mp4',
    'tt4':'/opt/wrenchboard/TEST/COMMON/MEDIA/SAML vs OAuth vs OIDC (explained simply!)-(1080p25).mp4',
    'tt5':'/opt/wrenchboard/TEST/COMMON/MEDIA/Running RabbitMQ Locally with Docker-(1080p60).mp4',
    'tt6':'/opt/wrenchboard/TEST/COMMON/MEDIA/React Proxy ｜ Easiest Fix to CORS Errors-(2160p24).mp4',
    'tt7':'/opt/wrenchboard/TEST/COMMON/MEDIA/RabbitMQ Tutorial - Publisher and Consumer program with example in nodeJS-(686p30).mp4',
    'tt8':'/opt/wrenchboard/TEST/COMMON/MEDIA/RabbitMQ - RPC with NodeJs (request-reply pattern)-(1080p60).mp4',
    'tt9':'/opt/wrenchboard/TEST/COMMON/MEDIA/How to Install RabbitMQ Locally with Docker-(1080p60).mp4',
}

const videoFileMap={
    'cdn':'videos/v1.mp4',
    'generate-pass':'videos/v2.mp4',
    'get-post':'videos/v3.mp4',
    'tt1':'What Is Single Sign-on (SSO)？ How It Works-(1080p25).mp4',
    'tt2':'What is RabbitMQ？-(1080p30).mp4',
    'tt3':'What is CORS？-(1080p50).mp4',
    'tt4':'SAML vs OAuth vs OIDC (explained simply!)-(1080p25).mp4',
    'tt5':'Running RabbitMQ Locally with Docker-(1080p60).mp4',
    'tt6':'React Proxy ｜ Easiest Fix to CORS Errors-(2160p24).mp4',
    'tt7':'RabbitMQ Tutorial - Publisher and Consumer program with example in nodeJS-(686p30).mp4',
    'tt8':'RabbitMQ - RPC with NodeJs (request-reply pattern)-(1080p60).mp4',
    'tt9':'How to Install RabbitMQ Locally with Docker-(1080p60).mp4',
}

console.log("Finding File");

var corsOptions = {
    origin: 'http://127.0.0.1:3000/',
    optionsSuccessStatus: 200 // some legacy browsers (IE11, various SmartTVs) choke on 204
}

app.use(cors(corsOptions));
 //   ,cors(corsOptions)

const storage = multer.diskStorage({
    destination: function(req, file, cb) {
    /*
        let uid = req.body.uid;
        let job_uid = req.body.job_uid;
        console.log(" req.body ->  ", req.body)
        console.log(" req.body.job_uid -> ", job_uid)

        const fs = require('fs');
        const dir = process.env.COMMON_TASKFILE_PATH + "/DUMMY/" + uid;
        if (!fs.existsSync(dir)){
            fs.mkdirSync(dir);
        }

        const dir2 = process.env.COMMON_TASKFILE_PATH + "/DUMMY/" + uid+"/"+job_uid;
        if (!fs.existsSync(dir2)){
            fs.mkdirSync(dir2);
        }
        return cb(null,  dir2)
         /opt/wrenchboard/TEST/DUMMY
         process.env.COMMON_TASKFILE_PATH +"/DUMMY"
        */
        return cb(null,  '/opt/wrenchboard/TEST/DUMMY')
    },
    filename: function (req, file, cb) {
        console.log(" AAAA --> req.body.job_uid -> ", req.body.job_uid)
        return cb(null, `${Date.now()}_${file.originalname}`)
    }
})

const upload = multer({storage})

app.post('/upload/task', upload.single('file'), (req, res) => {
    console.log(req.body)
    console.log(req.file)
    return res.status(200).send('Completed')
})




app.get('/videos/:filename', (req, res)=>{
    const fileName = req.params.filename;
    let findFilename = 'What Is Single Sign-on (SSO)？ How It Works-(1080p25).mp4';
   // var findFilename = '';
//c35c32bc-9ce4-4ca5-9afc-1ecddfd649f5
    let Qstring = "SELECT * FROM common_media WHERE uid ='"+fileName+"'";
    console.log("Qstring -> ", Qstring);
    db.query(Qstring, function (err, result) {
        try {
            console.log("BEFORE ERR CHECK -> " , result);
            if (err){
                console.log("IN ERR CHECK -> " , err);
                throw err;
            }
            // let resultItem = {
            //     "result": result.rows,
            //     "total_record": result.rowCount
            // }
            console.log("THIS IS RESULT  --> ",result.rows[0].filename);
            console.log("THIS IS RESULT COUNT  --> ",result.rowCount);
                if ( result.rowCount ===  1){
                    findFilename = result.rows[0].filename;
                }


            //const filePath = videoFileMap[fileName]
            const completeFile  =  process.env.COMMON_MEDIA_PATH + findFilename;
            if(!completeFile){
                console.log("Finding File Not Found ", completeFile);
                return res.status(404).send('File not found')
            }

            console.log("Finding File Found ", completeFile);

            const stat = fs.statSync(completeFile);
            const fileSize = stat.size;
            const range = req.headers.range;

            if(range){
                const parts = range.replace(/bytes=/, '').split('-')
                const start = parseInt(parts[0], 10);
                const end = parts[1] ? parseInt(parts[1], 10) : fileSize - 1;

                const chunksize = end - start + 1;
                const file = fs.createReadStream(completeFile, {start, end});
                const head = {
                    'Content-Range': `bytes ${start}-${end}/${fileSize}`,
                    'Accept-Ranges': 'bytes',
                    'Content-Length': chunksize,
                    'Content-Type': 'video/mp4'
                };
                res.writeHead(206, head);
                file.pipe(res);
            }
            else{
                const head = {
                    'Content-Length': fileSize,
                    'Content-Type': 'video/mp4'
                };
                res.writeHead(200, head);
                fs.createReadStream(completeFile).pipe(res)
            }
            } catch (e) {
            console.log("ERR->",e.message);
        }
    });



})

app.listen(3036, ()=>{
    console.log('server is listening on post 3036')
})