module.exports.tradeItems = (req, res) => {

    const config = require('../config');
    const points = config.app.inventoryPoints;

    let idBuyer = req.params.id;
    let wanted = req.body.wanted;
    let recipient = req.body.recipient;
    let payment = req.body.payment;

    let wantedPoints = 0;
    let paymentPoints = 0;


    Object.keys(wanted).forEach((key) => {
        if (!points[key]) {
            //error
            return;
        }
        wantedPoints += wanted[key] * points[key];
    });

    Object.keys(payment).forEach((key) => {
        if (!points[key]) {
            //error
        }
        paymentPoints += payment[key] * points[key];
    });

    if (wantedPoints != paymentPoints) {
        res.status(412).send('ops');
        return;
    }

    let pBuyer = new Promise((resolve, reject) => {
        Survivor.findById(idBuyer, (err, survivor) => {
            if (err)
                return reject(err);
            return resolve(survivor);
        });
    });

    let pRecipient = new Promise((resolve, reject) => {
        Survivor.findById({
            _id: recipient.id,
            name: recipient.name
        }, (err, survivor) => {
            if (err)
                return reject(err);
            return resolve(survivor);
        });
    });

    Promise.all([pBuyer, pRecipient])
    .then((data) => {
        let survivorBuyer = data[0];
        let survivorRecipient = data[1];

        Object.keys(payment).forEach((key) => {
            if (payment[key] > survivorBuyer.inventory[key]) {
                //error
                return;
            }
        });

        Object.keys(wanted).forEach((key) => {
            if (wanted[key] > survivorRecipient.inventory[key]) {
                //error
                return;
            }
        });

        Object.keys(wanted).forEach((key) => {
            survivorBuyer.inventory[key] += wanted[key];
            survivorRecipient.inventory[key] -= wanted[key];
        });

        Object.keys(payment).forEach((key) => {
            survivorRecipient.inventory[key] += payment[key];
            survivorBuyer.inventory[key] -= payment[key];
        });

        survivorBuyer.save((err) => {

            survivorRecipient.save((err) => {

                res.status(200).send('ok');
            });

        });
    })
    .catch((data) => {

    })
}