blackjack.go

package blackjack

// ParseCard returns the integer value of a card following blackjack ruleset.
func ParseCard(card string) int {
	switch card{
	case "ace":
		return 11
	case "two" :
		return 2
	case "three":
		return 3
	case "four":
		return 4
	case "five":
		return 5
	case "six":
		return 6
	case "seven":
		return 7
	case "eight":
		return 8
	case "nine":
		return 9
	case "ten" , "jack" , "queen" , "king":
		return 10
	default :
		return 0
	}
}

// FirstTurn returns the decision for the first turn, given two cards of the
// player and one card of the dealer.
func FirstTurn(card1, card2, dealerCard string) string {
	var playerScore int = ParseCard(card1) + ParseCard(card2)
	var dealerScore int = ParseCard(dealerCard)
     switch {
	     case card1 == "ace" && card2 == "ace":
	     	return "P"
     	case playerScore == 21:
	     	switch{
	     		case dealerScore < 10:
	     			return "W"
	     		default:
	     			return "S"
	     	}
     	case playerScore >= 17 && playerScore <=20:
     		return "S"
     	case playerScore >=12 && playerScore <=16:
	     	switch{
	 	    	case dealerScore >= 7:
	 	    		return "H"
	 	    	default:
	 	    		return "S"
	     	}
     default :
     	return "H"
     }
}