const fs = require('fs');
let PrankData = JSON.parse(fs.readFileSync("prankdata.txt"));

let nbPrank = 0;
let nbCrepe = 0;
let meanCrepe = 0;

for (var uid in PrankData) {
    if (PrankData[uid].type == "crêpe") {
        if (PrankData[uid].state == "Done") {
            nbPrank ++;
            nbCrepe += parseInt(PrankData[uid].amount)
        }
    }
}

meanCrepe = nbCrepe / nbPrank;

console.log("Nombre de mission mission achevé: " + nbPrank)
console.log("Nombre de crêpe servis: " + nbCrepe)
console.log("Nombre moyen de crêpe par demande: " + meanCrepe)