const SteamUser = require('steam-user');
const SteamTotp = require('steam-totp');
const SteamCommunity = require('steamcommunity');
const TradeOfferManager = require('steam-tradeoffer-manager');
const config = require('./config.json');
const Prices = require('./prices.json');

const client = new SteamUser();
const community = new SteamCommunity();
const manager = new TradeOfferManager ({
	steam: client,
	community: community,
	language: 'en'
});

const logOnOptions = {
	accountName: config.username,
	password: config.password,
	twoFactorCode: SteamTotp.generateAuthCode(config.sharedSecret)
};

client.logOn(logOnOptions);

client.on('loggedOn', () => {
	console.log('Successfully logged into Steam.');
	client.setPersona(SteamUser.Steam.EPersonaState.Online);
	client.gamesPlayed(440);
});

client.on("friendMessage", function(steamID, message) {
	if (message == "hi") {
		client.chatMessage(steamID, "Hello! I am working.");
	}
});

client.on('webSession', (sessionid, cookies) => {
	manager.setCookies(cookies);
	community.setCookies(cookies);
	community.startConfirmationChecker(10000, config.identitySecret);
});

function acceptOffer(offer) {
	offer.accept((err) => {
		console.log("Accepted an Offer.");
		if (err) console.log("Error accepting a trade offer.");
	});
}

function declineOffer(offer) {
	offer.decline((err) => {
		console.log("Declined an Offer.");
		if (err) console.log("Error declining a trade offer.");
	});
}

function processOffer(offer) {
	if (offer.isGlitched() || offer.state === 11) {
		console.log("The offer was glitched, declining...");
		declineOffer(offer);
	} else if (offer.partner.getSteamID64() === config.ownerID) {
		acceptOffer(offer);
	} else {
		var ourItems = offer.itemsToGive;
		var theirItems = offer.itemsToReceive;
		var ourValue = 0;
		var theirValue = 0;
        var hasUnlistedItems;
        var i, name, item;

		for ( i = 0; i < ourItems.length; i++) {
			name = ourItems[i].market_hash_name;
			item = Prices[name];

			if (item) {
				ourValue += item.sell;
			} else {
                hasUnlistedItems = true;
			}
		}
		for (i = 0; i < theirItems.length; i++) {
			name = theirItems[i].market_hash_name;
			item = Prices[name];

			if (item) {
				theirValue += item.buy;
			} else {

			}
		}

        console.log("Our value: "+ourValue);
        console.log("Their value: "+theirValue);

        if (!hasUnlistedItems && ourValue <= theirValue) {
            acceptOffer(offer);
        } else {
            declineOffer(offer);
        }
    }
}

manager.on('newOffer', (offer) => {
	processOffer(offer);
});