# 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.

from AlgorithmImports import *

### <summary>
### This algorithm demonstrate how to use Option Strategies (e.g. OptionStrategies.STRADDLE) helper classes to batch send orders for common strategies.
### 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="option strategies" />
### <meta name="tag" content="filter selection" />
class BasicTemplateOptionStrategyAlgorithm(QCAlgorithm):

 def initialize(self):
 # Set the cash we'd like to use for our backtest
 self.set_cash(1000000)

 # Start and end dates for the backtest.
 self.set_start_date(2015,12,24)
 self.set_end_date(2015,12,24)

 # Add assets you'd like to see
 option = self.add_option("GOOG")
 self.option_symbol = option.symbol

 # set our strike/expiry filter for this option chain
 # SetFilter method accepts timedelta objects or integer for days.
 # The following statements yield the same filtering criteria
 option.set_filter(lambda u: (u.standards_only().strikes(-2, +2).expiration(0, 180)))

 # use the underlying equity as the benchmark
 self.set_benchmark("GOOG")

 def on_data(self,slice):
 if not self.portfolio.invested:
 for kvp in slice.option_chains:
 chain = kvp.value
 contracts = sorted(sorted(chain, key = lambda x: abs(chain.underlying.price - x.strike)),
 key = lambda x: x.expiry, reverse=False)

 if len(contracts) == 0: continue
 atm_straddle = contracts[0]
 if atm_straddle != None:
 self.sell(OptionStrategies.straddle(self.option_symbol, atm_straddle.strike, atm_straddle.expiry), 2)
 else:
 self.liquidate()

 def on_order_event(self, order_event):
 self.log(str(order_event))