# 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.

import json
from AlgorithmImports import *

### <summary>
### Regression test to demonstrate setting custom Symbol Properties and Market Hours for a custom data import
### </summary>
### <meta name="tag" content="using data" />
### <meta name="tag" content="importing data" />
### <meta name="tag" content="custom data" />
### <meta name="tag" content="crypto" />
### <meta name="tag" content="regression test" />
class CustomDataPropertiesRegressionAlgorithm(QCAlgorithm):

    def initialize(self) -> None:
        self.set_start_date(2018, 4, 5)   # Set Start Date
        self.set_end_date(2018, 4, 10)    # Set End Date
        self.set_cash(100000)             # Set Strategy Cash

        # Define our custom data properties and exchange hours
        ticker = 'BTC'
        properties = SymbolProperties("Bitcoin", "USD", 1, 0.01, 0.01, ticker)
        exchange_hours = SecurityExchangeHours.always_open(TimeZones.NEW_YORK)

        # Add the custom data to our algorithm with our custom properties and exchange hours
        self._bitcoin = self.add_data(Bitcoin, ticker, properties, exchange_hours, leverage=1, fill_forward=False)

        # Verify our symbol properties were changed and loaded into this security
        if self._bitcoin.symbol_properties != properties :
            raise AssertionError("Failed to set and retrieve custom SymbolProperties for BTC")

        # Verify our exchange hours were changed and loaded into this security
        if self._bitcoin.exchange.hours != exchange_hours :
            raise AssertionError("Failed to set and retrieve custom ExchangeHours for BTC")

        # For regression purposes on AddData overloads, this call is simply to ensure Lean can accept this
        # with default params and is not routed to a breaking function.
        self.add_data(Bitcoin, "BTCUSD")

    def on_data(self, data: Slice) -> None:
        if not self.portfolio.invested:
            if data['BTC'].close != 0 :
                self.order('BTC', self.portfolio.margin_remaining/abs(data['BTC'].close + 1))

    def on_end_of_algorithm(self) -> None:
        #Reset our Symbol property value, for testing purposes.
        self.symbol_properties_database.set_entry(Market.USA, self.market_hours_database.get_database_symbol_key(self._bitcoin.symbol), SecurityType.BASE,
            SymbolProperties.get_default("USD"))


class Bitcoin(PythonData):
    '''Custom Data Type: Bitcoin data from Quandl - http://www.quandl.com/help/api-for-bitcoin-data'''

    def get_source(self, config: SubscriptionDataConfig, date: datetime, is_live_mode: bool) -> SubscriptionDataSource:
        if is_live_mode:
            return SubscriptionDataSource("https://www.bitstamp.net/api/ticker/", SubscriptionTransportMedium.REST)

        # Read from a local data file so the test is deterministic instead of depending on a remote source
        source = f"{Globals.data_folder}/crypto/coinbase/daily/btcusd_trade.zip"
        return SubscriptionDataSource(source, SubscriptionTransportMedium.LOCAL_FILE, FileFormat.CSV)

    def reader(self, config: SubscriptionDataConfig, line: str, date: datetime, is_live_mode: bool) -> DynamicData:
        coin = Bitcoin()
        coin.symbol = config.symbol

        if is_live_mode:
            # Example Line Format:
            # {"high": "441.00", "last": "421.86", "timestamp": "1411606877", "bid": "421.96", "vwap": "428.58", "volume": "14120.40683975", "low": "418.83", "ask": "421.99"}
            try:
                live_btc = json.loads(line)

                # If value is zero, return None
                value = live_btc["last"]
                if value == 0: return coin

                coin.time = datetime.now()
                coin.value = value
                coin["Open"] = float(live_btc["open"])
                coin["High"] = float(live_btc["high"])
                coin["Low"] = float(live_btc["low"])
                coin["Close"] = float(live_btc["last"])
                coin["Ask"] = float(live_btc["ask"])
                coin["Bid"] = float(live_btc["bid"])
                coin["VolumeBTC"] = float(live_btc["volume"])
                coin["WeightedPrice"] = float(live_btc["vwap"])
                return coin
            except ValueError:
                # Do nothing, possible error in json decoding
                return coin

        # Example Line Format:
        # date            open     high     low      close    volume
        # 20180405 00:00  6791.68  6933.11  6568.64  6785.85  13832.668772
        try:
            data = line.split(',')
            coin.time = datetime.strptime(data[0], "%Y%m%d %H:%M")
            coin.end_time = coin.time + timedelta(1)
            coin.value = float(data[4])
            coin["Open"] = float(data[1])
            coin["High"] = float(data[2])
            coin["Low"] = float(data[3])
            coin["Close"] = float(data[4])
            coin["VolumeBTC"] = float(data[5])
            return coin

        except ValueError:
            # Do nothing, skip malformed rows
            return coin