const express = require('express')
const app = express()
const port = 3000
const path = require('path')

app.use(express.urlencoded({
    extended: true
}))

app.get("/", function(req, res) {
    res.sendFile(path.join(__dirname, '/static/formularz.html'))
})

app.post("/", function(req, res) {
    let message;
    let result;
    if(req.body.c == "suma") {
        message = "suma dwóch elementów"
        result = parseInt(req.body.a) + parseInt(req.body.b)
    } else {
        message = "różnica dwóch elementów"
        result = parseInt(req.body.a) - parseInt(req.body.b)
    }
    console.log(JSON.stringify({x:1}, null, 5))
    res.header("content-type", "application/json")
    res.send({"message": message, "wynik": result})
})

app.listen(port, function() {
    console.log("dziala")
})