# https://quantpedia.com/strategies/value-factor-effect-within-countries/
#
# The investment universe consists of 32 countries with easily accessible equity markets (via ETFs, for example). At the end of every year, 
# the investor calculates Shiller’s “CAPE” Cyclically Adjusted PE) ratio, for each country in his investment universe. CAPE is the ratio of 
# the real price of the equity market (adjusted for inflation) to the 10-year average of the country’s equity index (again adjusted for inflation). 
# The whole methodology is explained well on Shiller’s home page (http://www.econ.yale.edu/~shiller/data.htm) or
# http://turnkeyanalyst.com/2011/10/the-shiller-pe-ratio/). The investor then invests in the cheapest 33% of countries from his sample if those 
# countries have a CAPE below 15. The portfolio is equally weighted (the investor holds 0% cash instead of countries with a CAPE higher than 15)
# and rebalanced yearly.

class ValueFactorCAPEEffectwithinCountries(QCAlgorithm):

    def Initialize(self):
        self.SetStartDate(2008, 1, 1)  
        self.SetCash(100000)

        self.symbols = {
            "Australia"     : "EWA",  # iShares MSCI Australia Index ETF
            "Brazil"        : "EWZ",  # iShares MSCI Brazil Index ETF
            "Canada"        : "EWC",  # iShares MSCI Canada Index ETF
            "Switzerland"   : "EWL",  # iShares MSCI Switzerland Index ETF
            "China"         : "FXI",  # iShares China Large-Cap ETF
            "France"        : "EWQ",  # iShares MSCI France Index ETF
            "Germany"       : "EWG",  # iShares MSCI Germany ETF 
            "Hong Kong"     : "EWH",  # iShares MSCI Hong Kong Index ETF
            "Italy"         : "EWI",  # iShares MSCI Italy Index ETF
            "Japan"         : "EWJ",  # iShares MSCI Japan Index ETF
            "Korea"         : "EWY",  # iShares MSCI South Korea ETF
            "Mexico"        : "EWW",  # iShares MSCI Mexico Inv. Mt. Idx
            "Netherlands"   : "EWN",  # iShares MSCI Netherlands Index ETF
            "South Africa"  : "EZA",  # iShares MSCI South Africe Index ETF
            "Singapore"     : "EWS",  # iShares MSCI Singapore Index ETF
            "Spain"         : "EWP",  # iShares MSCI Spain Index ETF
            "Sweden"        : "EWD",  # iShares MSCI Sweden Index ETF
            "Taiwan"        : "EWT",  # iShares MSCI Taiwan Index ETF
            "UK"            : "EWU",  # iShares MSCI United Kingdom Index ETF
            "USA"           : "SPY",  # SPDR S&P 500 ETF
            
            "Russia"        : "ERUS",  # iShares MSCI Russia ETF
            "Israel"        : "EIS",   # iShares MSCI Israel ETF
            "India"         : "INDA",  # iShares MSCI India ETF
            "Poland"        : "EPOL",  # iShares MSCI Poland ETF
            "Turkey"        : "TUR"    # iShares MSCI Turkey ETF
        }

        for country, etf_symbol in self.symbols.items():
            data = self.AddEquity(etf_symbol, Resolution.Daily)
            data.SetFeeModel(CustomFeeModel(self))
            
        # CAPE data import.
        self.AddData(CAPE, 'CAPE',  Resolution.Daily)
            
        self.month = 11
        
        self.Schedule.On(self.DateRules.MonthStart('EWA'), self.TimeRules.AfterMarketOpen('EWA'), self.Rebalance)
        
    def Rebalance(self):
        self.month += 1
        if self.month > 12:
            self.month = 1
            
        if self.month != 12:
            return
        
        price = {}
        for country, etf_symbol in self.symbols.items():
            if self.Securities.ContainsKey('CAPE') and self.Securities.ContainsKey(etf_symbol):
                cape_data = self.Securities['CAPE'].GetLastData()
                if cape_data:
                    # cape data is still comming in
                    if (self.Time.date() - cape_data.Time.date()).days <= 31:
                        country_cape = cape_data.GetProperty(country)
                        if country_cape < 15:
                            etf_price = self.Securities[etf_symbol].Price
                            if etf_price != 0:
                                price[etf_symbol] = etf_price
        
        long = []
        
        # Cape and price sorting.
        if len(price) != 0:
            sorted_by_price = sorted(price.items(), key = lambda x: x[1], reverse = True)
            tercile = int(len(sorted_by_price) / 3)
            long = [x[0] for x in sorted_by_price[-tercile:]]
        
        # Trade execution.
        invested = [x.Key for x in self.Portfolio if x.Value.Invested]
        for symbol in invested:
            if symbol not in long:
                self.Liquidate(symbol)
        
        for symbol in long:
            if self.Securities[etf_symbol].Price != 0 and self.Securities[etf_symbol].IsTradable:
                self.SetHoldings(symbol, 1 / len(long))

# NOTE: IMPORTANT: Data order must be ascending (datewise)
# Data source: https://indices.barclays/IM/21/en/indices/static/historic-cape.app
class CAPE(PythonData):
    def GetSource(self, config, date, isLiveMode):
        return SubscriptionDataSource("data.quantpedia.com/backtesting_data/economic/cape_by_country.csv", SubscriptionTransportMedium.RemoteFile, FileFormat.Csv)

    def Reader(self, config, line, date, isLiveMode):
        data = CAPE()
        data.Symbol = config.Symbol
        
        if not line[0].isdigit(): return None
        split = line.split(';')
        
        data.Time = datetime.strptime(split[0], "%Y-%m-%d") + timedelta(days=1)
        
        data['Australia'] = float(split[1])
        data['Brazil'] = float(split[2])
        data['Canada'] = float(split[3])
        data['Switzerland'] = float(split[4])
        data['China'] = float(split[5])
        data['France'] = float(split[6])
        data['Germany'] = float(split[7])
        data['Hong Kong'] = float(split[8])
        data['India'] = float(split[9])
        data['Israel'] = float(split[10])
        data['Italy'] = float(split[11])
        data['Japan'] = float(split[12])
        data['Korea'] = float(split[13])
        data['Mexico'] = float(split[14])
        data['Netherlands'] = float(split[15])
        data['Poland'] = float(split[16])
        data['Russia'] = float(split[17])
        data['South Africa'] = float(split[18])
        data['Singapore'] = float(split[19])
        data['Spain'] = float(split[20])
        data['Sweden'] = float(split[21])
        data['Taiwan'] = float(split[22])
        data['Turkey'] = float(split[23])
        data['UK'] = float(split[24])
        data['USA'] = float(split[25])
        
        data.Value = float(split[1])

        return data

# Custom fee model.
class CustomFeeModel(FeeModel):
    def GetOrderFee(self, parameters):
        fee = parameters.Security.Price * parameters.Order.AbsoluteQuantity * 0.00005
        return OrderFee(CashAmount(fee, "USD"))