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


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)

app.get('/videos/:filename', (req, res)=>{
    const fileName = req.params.filename;

//c35c32bc-9ce4-4ca5-9afc-1ecddfd649f5
    let Qstring = "SELECT * FROM common_media WHERE uid ='"+fileName+"'";
    db.query(Qstring, function (err, result) {
        try {
            if (err) throw err;
            let resultItem = {
                "result": result.rows,
                "total_record": result.rowCount
            }
            console.log(result);
            } catch (e) {
        }
    });


    const filePath = videoFileMap[fileName]
    const completeFile  =  process.env.COMMON_MEDIA_PATH + filePath;
    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)
    }
})

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