/*
2020-01-09 - get the gains generated by my automated ETC trading.
2020-10-23 - fix problem because API requires windowing to handle more than 50 rows, implemented windowing.
*/

const key          = 'SOOOJ7OhVCOpJE4DAWz8v5B25UpdYya9buF8DFAkHzmUab5E9i0PlEPh'; // API Key
const secret       = 'UytAbgU8ty3n5a+JhaoIlcfh8zM4OBGY6PCC+Cfg2NI4waVzM52BBp9qmmyczrTDQpeha8q3nHeE/p7wNWKiVA=='; // API Private Key
const KrakenClient = require('kraken-api');
const kraken       = new KrakenClient(key, secret);
 
(async () => {
    try {		
		let params={
                        ofs : 0		
		};
		try {
			// get the pair to process from the first parameter and fall back if not provided.
			let thePair=process.argv[2];
			if (thePair===undefined) {
				thePair="XXMRZUSD";
			}
			console.log("Processing pair: ", thePair);
			let allBalances=await kraken.api('Balance');
			//console.log(JSON.stringify(allBalances));
			let etcUsdQuote = await kraken.api('Ticker', { pair : thePair });
			//console.log(JSON.stringify(etcUsdQuote));
			let allTransactions = await kraken.api('TradesHistory', params);
	
			let dailyResults = [];
			//console.log("Get Trade History ",JSON.stringify(allTransactions,null,"  "));
			let allTradeIDs=Object.keys(allTransactions.result.trades);
			let sumUSD=0;
			let sumCommission=0;
			let numTrans=allTradeIDs.length;
			let numTrades=0;
			for (let i=0;i<numTrans;i++){
				params.ofs+=1;
				let theTrade=allTransactions.result.trades[allTradeIDs[i]];
				if (theTrade.pair===thePair) {
					numTrades++;
					console.log(JSON.stringify(theTrade));
					let multiplier=1;
					if (theTrade.type==="buy") {
						multiplier=-1;
					}
						
					sumUSD += Number(theTrade.cost) * multiplier;
					sumCommission += Number(theTrade.fee);
					let transactionTime = x=new Date(theTrade.time*1000);
					let transactionDate = transactionTime.toISOString().split("T")[0];
					if (dailyResults[transactionDate] === undefined) {
						dailyResults[transactionDate] =0;
					}
					dailyResults[transactionDate] += (Number(theTrade.cost) * multiplier)
					dailyResults[transactionDate] -= Number(theTrade.fee);
				}
					
				// console.log(params.ofs,JSON.stringify(theTrade));
				if ((params.ofs % 50) == 0) { // Not really great style to update the for condition var here, but it works...
					console.log("Load more results; offset ",params.ofs);
					params.nonce = new Date() * 1000;
					allTransactions = await kraken.api('TradesHistory', params);
					allTradeIDs=allTradeIDs.concat(Object.keys(allTransactions.result.trades));
					numTrans=allTradeIDs.length;
				}
			}
			
			Object.keys(dailyResults).forEach(date=>{
			//	console.log(date," -> ",dailyResults[date]);
			}); 
			
			console.log("# trades               : ", numTrades);
			console.log("SUM USD                : ", sumUSD);
			console.log("SUM fees               : ", sumCommission);
			let netGain = sumUSD - sumCommission;
			console.log("Net Gain               : ", netGain);
			
			// find the currency by looking for "startsWith" match in the symbol in the pair..
			let theCurrency=undefined;
			Object.keys(allBalances.result).forEach((currency)=>{
				if (thePair.indexOf(currency)===0) {
					theCurrency=currency;
				}
			});
				
			let numCoinsHeld = Number(allBalances.result[theCurrency]);
			console.log("# coins Held           : ", numCoinsHeld, " [", theCurrency,"]");
			let sellPrice = Number(etcUsdQuote.result[thePair].b[0]);
			console.log("Current Price          : ", sellPrice);
			let worthHeldCoins = numCoinsHeld * sellPrice;
			console.log("Worth held coins       : ", worthHeldCoins);
			let netLiq = netGain + worthHeldCoins;
			console.log("Net Liquidation Gain   : " , netLiq);
		} catch (ex) {
			console.error("Error getting trade history: ", ex.message);
		}
	} catch (ex) {
		console.error("Hit general Error-handler: ", ex.message, "\n", ex.stack);
	}
})();