/*
 * QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
 * Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
*/

using System;
using NUnit.Framework;
using QuantConnect.Data;
using QuantConnect.Data.Market;
using QuantConnect.Orders;
using QuantConnect.Orders.Fees;
using QuantConnect.Securities;
using QuantConnect.Securities.Crypto;

namespace QuantConnect.Tests.Common.Orders.Fees
{
    [TestFixture]
    class BitfinexFeeModelTests
    {
        private Crypto _btcusd;
        private Crypto _btceur;
        private readonly IFeeModel _feeModel = new BitfinexFeeModel();

        [SetUp]
        public void Initialize()
        {
            var tz = TimeZones.NewYork;
            _btcusd = new Crypto(
                SecurityExchangeHours.AlwaysOpen(tz),
                new Cash(Currencies.USD, 0, 1),
                new Cash("BTC", 0, 0),
                new SubscriptionDataConfig(typeof(TradeBar), Symbols.BTCUSD, Resolution.Minute, tz, tz, true, false, false),
                new SymbolProperties("BTCUSD", Currencies.USD, 1, 0.01m, 0.00000001m, string.Empty),
                ErrorCurrencyConverter.Instance,
                RegisteredSecurityDataTypesProvider.Null
            );
            _btcusd.SetMarketPrice(new Tick(DateTime.UtcNow, _btcusd.Symbol, 100, 100));

            _btceur = new Crypto(
                SecurityExchangeHours.AlwaysOpen(tz),
                new Cash("EUR", 0, 10),
                new Cash("BTC", 0, 0),
                new SubscriptionDataConfig(typeof(TradeBar), Symbols.BTCEUR, Resolution.Minute, tz, tz, true, false, false),
                new SymbolProperties("BTCEUR", "EUR", 1, 0.01m, 0.00000001m, string.Empty),
                ErrorCurrencyConverter.Instance,
                RegisteredSecurityDataTypesProvider.Null
            );
            _btceur.SetMarketPrice(new Tick(DateTime.UtcNow, _btceur.Symbol, 100, 100));
        }

        [TestCase(1)]
        [TestCase(-1)]
        public void ReturnsFeeInQuoteCurrencyInAccountCurrency(decimal quantity)
        {
            var fee = _feeModel.GetOrderFee(
                new OrderFeeParameters(
                    _btcusd,
                    new MarketOrder(_btcusd.Symbol, quantity, DateTime.UtcNow)
                )
            );

            if (quantity > 0)
            {
                Assert.AreEqual("BTC", fee.Value.Currency);
                // 1 (quantity) * 0.002 (taker fee)
                Assert.AreEqual(0.002m, fee.Value.Amount);
            }
            else
            {
                Assert.AreEqual(Currencies.USD, fee.Value.Currency);
                // 100 (price) * 0.002 (taker fee)
                Assert.AreEqual(0.2m, fee.Value.Amount);
            }
        }

        [TestCase(1)]
        [TestCase(-1)]
        public void ReturnsFeeInQuoteCurrencyInOtherCurrency(decimal quantity)
        {
            var fee = _feeModel.GetOrderFee(
                new OrderFeeParameters(
                    _btceur,
                    new MarketOrder(_btceur.Symbol, quantity, DateTime.UtcNow)
                )
            );

            if (quantity > 0)
            {
                Assert.AreEqual("BTC", fee.Value.Currency);
                // 1 (quantity) * 0.002 (taker fee)
                Assert.AreEqual(0.002m, fee.Value.Amount);
            }
            else
            {
                Assert.AreEqual("EUR", fee.Value.Currency);
                // 100 (price) * 0.002 (taker fee)
                Assert.AreEqual(0.2m, fee.Value.Amount);
            }
        }
    }
}