puts "Welcome to the Ada Developers Academy's Computer Candy Machine!"
puts "(All candy provided is virtual.)"

# Ask the user how much money they have
puts "How much money do you have?"

money = gets.chomp.to_f
while money <= 0
    puts "Please enter a valid amount."
    money = gets.chomp.to_f
end

#Display all the candy options and their costs (even if they cannot afford the candy
puts "We have:
A $0.65 Twix
B $0.50 Chips
C $0.75 Nutter Butter
D $0.65 Peanut Butter Cup
E $.55 Juicy Fruit Gum "

products = {
    'A': 0.65,
    'B': 0.50,
    'C': 0.75,
    'D': 0.65,
    'E': 0.55
}

# Decide whether the user can afford the candy or not
puts "What would you like to have?"

# Handle when the buyer enters "C" or "c" so that it works as expected
candy = gets.chomp.upcase.to_sym

until products.key? candy
    puts "Please enter a valid letter"
    candy = gets.chomp.upcase
end

change = money - products[candy]
if change > 0
    puts "Your change is $#{change}. Please take your candy."
elsif change == 0
    puts "Please take your candy"
elsif change < 0
    puts "You do not have enough money to buy the selected candy."
end