# Author:      Nozdrum

avgExoticValue = 30000 #3g
avgRareValue = 5000 #50s
precursorProbablity = 0.005 #not really important, since it does not impact the choice, just how much you have to pay in the end

class Item:
    minCost = 0 # Minimal cost of an item to be put in the mystic forge
    exoticProbablity = 0 # Probablity that this will yield in an exotic
    n = 0.0 # Average Number of attempts

    # compute average number of attempts at the mystic forge
    def attempts(self):
        self.n =  1 / (self.exoticProbablity * precursorProbablity )

    def avgCostPerPrecursor(self):
        costToProduce = (4*self.minCost * self.n)
        rakeBackExotic = ( avgExoticValue * ( self.n * self.exoticProbablity )) # average Value of exotics you get
        rakeBackRare = ( avgRareValue * ( self.n * ( 1- self.exoticProbablity ))) # average Value of rares you get

        return costToProduce - rakeBackRare - rakeBackExotic

class Rare(Item):

    def __init__(self):
        self.exoticProbablity = 0.2 # Every fifth attempt yields an exotic
        self.minCost = 4000 #40 Silver
        self.attempts()

class Exotic(Item):
    def __init__(self):
        self.exoticProbablity = 1 #Exotics always yield exotics
        self.minCost = 24000 #2g40s
        self.attempts()

def pretty(number):
    copper = format((number % 100),".0f") + "c"
    number = number / 100
    silver = format(number % 100,".0f") + "s"
    number = number / 100
    return format(number,".0f") + "g"+silver +copper

rare = Rare()
exotic = Exotic()

print("Rare: Average Number of attempts: " + str(rare.n) + " avgCostPerPrecursor: " + pretty(rare.avgCostPerPrecursor()))
print("Exotic: Average Number of attempts: " + str(exotic.n) + " avgCostPerPrecursor: " + pretty(exotic.avgCostPerPrecursor()))