// Main Part 1 about a really dumb investment strategy

//===================================================

object M1 {

//two test portfolios

val blchip_portfolio = List("GOOG", "AAPL", "MSFT", "IBM", "FB", "AMZN", "BIDU")

val rstate_portfolio = List("PLD", "PSA", "AMT", "AIV", "AVB", "BXP", "CCI", 

                            "DLR", "EQIX", "EQR", "ESS", "EXR", "FRT", "HCP") 

import io.Source

import scala.util._

def get_january_data(symbol: String, year: Int) : List[String] = ???

def get_first_price(symbol: String, year: Int) : Option[Double] = ???

def get_prices(portfolio: List[String], years: Range) : List[List[Option[Double]]] = ???

def get_delta(price_old: Option[Double], price_new: Option[Double]) : Option[Double] = ???

def get_deltas(data: List[List[Option[Double]]]) :  List[List[Option[Double]]] = ???

def yearly_yield(data: List[List[Option[Double]]], balance: Long, index: Int) : Long = ???

def compound_yield(data: List[List[Option[Double]]], balance: Long, index: Int) : Long = ???

def investment(portfolio: List[String], years: Range, start_balance: Long) : Long = ???

//Test cases for the two portfolios given above

//println("Real data: " + investment(rstate_portfolio, 1978 to 2019, 100))

//println("Blue data: " + investment(blchip_portfolio, 1978 to 2019, 100))

}