/*
 * 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 System.Collections.Generic;
using System.Linq;
using QuantConnect.Data;
using QuantConnect.Data.Market;
using QuantConnect.Orders;
using QuantConnect.Interfaces;

namespace QuantConnect.Algorithm.CSharp
{
    /// <summary>
    /// This example demonstrates how to add options for a given underlying equity security.
    /// It also shows how you can prefilter contracts easily based on strikes and expirations, and how you
    /// can inspect the option chain to pick a specific option contract to trade.
    /// </summary>
    /// <meta name="tag" content="using data" />
    /// <meta name="tag" content="options" />
    /// <meta name="tag" content="filter selection" />
    public class BasicTemplateOptionsDailyAlgorithm : QCAlgorithm, IRegressionAlgorithmDefinition
    {
        private const string UnderlyingTicker = "GOOG";
        public Symbol OptionSymbol;
        private bool _optionExpired;

        public override void Initialize()
        {
            SetStartDate(2015, 12, 23);
            SetEndDate(2016, 1, 20);
            SetCash(100000);

            var equity = AddEquity(UnderlyingTicker, Resolution.Daily);
            var option = AddOption(UnderlyingTicker, Resolution.Daily);
            OptionSymbol = option.Symbol;

            option.SetFilter(x => x.CallsOnly().Strikes(0, 1).Expiration(0, 30));

            // use the underlying equity as the benchmark
            SetBenchmark(equity.Symbol);
        }

        /// <summary>
        /// Event - v3.0 DATA EVENT HANDLER: (Pattern) Basic template for user to override for receiving all subscription data in a single event
        /// </summary>
        /// <param name="slice">The current slice of data keyed by symbol string</param>
        public override void OnData(Slice slice)
        {
            if (!Portfolio.Invested)
            {
                OptionChain chain;
                if (slice.OptionChains.TryGetValue(OptionSymbol, out chain))
                {
                    // Grab us the contract nearest expiry that is not today
                    var contractsByExpiration = chain.Where(x => x.Expiry != Time.Date).OrderBy(x => x.Expiry);
                    var contract = contractsByExpiration.FirstOrDefault();

                    if (contract != null && IsMarketOpen(contract.Symbol))
                    {
                        // if found, trade it
                        MarketOrder(contract.Symbol, 1);
                    }
                }
            }
        }

        /// <summary>
        /// Order fill event handler. On an order fill update the resulting information is passed to this method.
        /// </summary>
        /// <param name="orderEvent">Order event details containing details of the evemts</param>
        /// <remarks>This method can be called asynchronously and so should only be used by seasoned C# experts. Ensure you use proper locks on thread-unsafe objects</remarks>
        public override void OnOrderEvent(OrderEvent orderEvent)
        {
            Log(orderEvent.ToString());

            // Check for our expected OTM option expiry
            if (orderEvent.Message == "OTM")
            {
                // Assert it is at midnight (5AM UTC)
                if (orderEvent.UtcTime != new DateTime(2016, 1, 16, 5, 0, 0))
                {
                    throw new ArgumentException($"Expiry event was not at the correct time, {orderEvent.UtcTime}");
                }

                _optionExpired = true;
            }
        }

        public override void OnEndOfAlgorithm()
        {
            // Assert we had our option expire and fill a liquidation order
            if (_optionExpired != true)
            {
                throw new ArgumentException("Algorithm did not process the option expiration like expected");
            }
        }

        /// <summary>
        /// This is used by the regression test system to indicate if the open source Lean repository has the required data to run this algorithm.
        /// </summary>
        public bool CanRunLocally { get; } = true;

        /// <summary>
        /// This is used by the regression test system to indicate which languages this algorithm is written in.
        /// </summary>
        public Language[] Languages { get; } = { Language.CSharp, Language.Python };

        /// <summary>
        /// Data Points count of all timeslices of algorithm
        /// </summary>
        public long DataPoints => 41730;

        /// <summary>
        /// Data Points count of the algorithm history
        /// </summary>
        public int AlgorithmHistoryDataPoints => 0;

        /// <summary>
        /// This is used by the regression test system to indicate what the expected statistics are from running the algorithm
        /// </summary>
        public Dictionary<string, string> ExpectedStatistics => new Dictionary<string, string>
        {
            {"Total Trades", "2"},
            {"Average Win", "0%"},
            {"Average Loss", "-1.31%"},
            {"Compounding Annual Return", "-15.304%"},
            {"Drawdown", "1.300%"},
            {"Expectancy", "-1"},
            {"Net Profit", "-1.311%"},
            {"Sharpe Ratio", "-3.31"},
            {"Probabilistic Sharpe Ratio", "0.035%"},
            {"Loss Rate", "100%"},
            {"Win Rate", "0%"},
            {"Profit-Loss Ratio", "0"},
            {"Alpha", "0"},
            {"Beta", "0"},
            {"Annual Standard Deviation", "0.034"},
            {"Annual Variance", "0.001"},
            {"Information Ratio", "-3.31"},
            {"Tracking Error", "0.034"},
            {"Treynor Ratio", "0"},
            {"Total Fees", "$1.00"},
            {"Estimated Strategy Capacity", "$18000.00"},
            {"Lowest Capacity Asset", "GOOCV W78ZFMML01JA|GOOCV VP83T1ZUHROL"},
            {"Fitness Score", "0"},
            {"Kelly Criterion Estimate", "0"},
            {"Kelly Criterion Probability Value", "0"},
            {"Sortino Ratio", "-1.496"},
            {"Return Over Maximum Drawdown", "-11.673"},
            {"Portfolio Turnover", "0"},
            {"Total Insights Generated", "0"},
            {"Total Insights Closed", "0"},
            {"Total Insights Analysis Completed", "0"},
            {"Long Insight Count", "0"},
            {"Short Insight Count", "0"},
            {"Long/Short Ratio", "100%"},
            {"Estimated Monthly Alpha Value", "$0"},
            {"Total Accumulated Estimated Alpha Value", "$0"},
            {"Mean Population Estimated Insight Value", "$0"},
            {"Mean Population Direction", "0%"},
            {"Mean Population Magnitude", "0%"},
            {"Rolling Averaged Population Direction", "0%"},
            {"Rolling Averaged Population Magnitude", "0%"},
            {"OrderListHash", "c6d089f1fb86379c74a7413a9c2f8553"}
        };
    }
}