var express = require('express');
var exphbs = require('express-handlebars')
var path = require('path');
var logger = require('morgan');
var request = require('request');
var fs = require('fs');




var indexRouter = require('./routes/index');
//var usersRouter = require('./routes/users');
var checkoutRouter = require('./routes/checkout');
var authRouter = require('./routes/authPrimavera');
var productsRouter = require('./routes/products');
var app = express();

// view engine setup
app.engine('handlebars', exphbs({defaultLayout: 'main'}));
app.set('view engine', 'handlebars');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(express.static(path.join(__dirname, 'public')));

//URL base da API
global.url = "http://localhost:2018/WebApi/";
global.token = "";


//A função abaixo corre sempre que é feito um pedido a qualquer rota de forma a definir um token
//a ser usado a nivel global
app.use(async (req, res, next) =>{
    fs.readFile('token.txt', function(err, data) {
        if(err){
            global.token = "";
            return;
        }
        global.token = data;
        return;
      });

    if(token == ""){
    let params ={
        username: 'FEUP',
        password: 'qualquer1',
        company: 'BELAFLOR',
        instance: 'DEFAULT',
        grant_type: 'password',
        line: 'professional'
    };

    await request.post({url: url+"token", form:params}, (error, response, body) => {
        if (error) {

            console.error(error);
            return;
        } else {

            jsonArray = JSON.parse(body);
            token = jsonArray["access_token"];
            fs.writeFile('token.txt', token, function (err) {
                if (err) throw err;
                console.log('Saved!');
              });
        }
    });
}
    next();

});

app.use('/', indexRouter);
//app.use('/users', usersRouter);
app.use('/checkout',checkoutRouter);//(my_var);
app.use('/authPrimavera',authRouter);
app.use('/products',productsRouter);


module.exports = app;