// Smiiirl Compteur - Entreprise Spirit SA 
// https://lab.niemes.info/software/spirit_smiirl.git
// https://spirit.niemes.info
// Copyright Niemeskern Kévin 2021.

const path = require('path');
const express = require('express');
const app = express();
const port = process.env.PORT || 8111;
const bodyParser = require('body-parser');
const validator = require('validator');
const API = require('./lib/API');
const mail =  require('./notification.js')
const jsonfile = require('jsonfile')
const tokenFile = './token.json'


let info = {
    followers: 99999,
    companyID: 991997, // spirit_3 company page
    orgaName: "spirit_3",
    token: {},
    expire: 0,
    active: true,
    updateTime: 4000, // 25000 Api call / 24H,
    error: 0
}

jsonfile.readFile(tokenFile, function (err, obj) {
    if (err) console.error(err)
    else {
        console.dir(obj)
        info.token = obj
        obj = process.env.access_token
    }
  })

function updateTokenEnv(data){

    let reqObj = data
    info.token = reqObj
    info.authorized = true;
    info.active = true

    console.log("[updateTokenEnv] :");
    console.log(data);
    jsonfile.writeFile(tokenFile, reqObj, function (err) {
        if (err) console.error(err)
        else console.log("Token File updated")
      })
}

async function watchLinkedin(){
    
    if (info.active){
        const getFollowers = API.getCompanyFollowers(info)
        
        getFollowers.then( (followersNb) => {

            if (followersNb.firstDegreeSize) {
                info.followers = followersNb.firstDegreeSize
                info.error = 0 // cleanUp error
            }
        }).catch( async (err) => {
            console.log("[DEBUG-LOG][watchLinkedin ERROR]", info.error, err);
            info.error++
            if (info.error > 50) {
                info.active = false
                // try refresh token 
                const data = await API.getAccessToken(info.token)

                if (data.access_token) updateTokenEnv(data)
                else mail.notif();
            }
        });
    }
}

setInterval(watchLinkedin, info.updateTime)

// --- --- --- --- --- --- EXPRESS SERVER

app.disable('x-powered-by');
app.use(bodyParser.urlencoded({ extended: true}));

app.get('/', (req, res) => {
    res.json({number: info.followers})
});

app.get('/auth', (req, res) => {
    res.redirect(API.getAuthorizationUrl());
});

app.get('/callback', async (req, res) => {
    if(!req.query.code) {
        res.redirect('/');
        return;
    }
    try {
        const data = await API.getAccessToken(req.query.code);
        if(data.access_token) updateTokenEnv(data)
        
        res.redirect('/');
    } catch(err) {
        res.json(err);
    }
});

app.get('/test', async (req, res) => {
    try {
        const id = await API.getLinkedinId(info);
        console.log("[getLinkedinId]", id)
        res.json(id)
    } catch(err) {
        res.send(err);
     }
});

app.get('/company', async (req, res) => {
    try {
        await API.getCompanyFollowers(info)
        .then( (followersNb) => {
            if (followersNb.firstDegreeSize) {
                info.followers = followersNb.firstDegreeSize
                process.env.lastFollowers = info.followers
                res.json(info.followers)
            } else res.json({"error": "firstDegreeSize not available"})
        }).catch( (err) => {
            info.error++
            if (info.error > 50) mail.notif(process.env.usermail, process.env.pswd, process.env.contact);
        })

    } catch(err) {
        res.send(err);
    }
});

app.listen(port);