# Initialize user_input
user_input = nil

# Validate user input
until user_input == "rock" || user_input == "paper" || user_input == "scissors"
  # Ask user input (rock/paper/scissors)
  puts "Choose between rock, paper or scissors."
  user_input = gets.chomp
end

# Randomly select rock/paper/scissors (computer)
choices = ["rock", "paper", "scissors"]
computer_input = choices.sample

# Display the user's and computer's picks
puts "The computer chose #{computer_input}."
puts "You chose #{user_input}."

# Define game rules for rock/paper/scissors
# Compare computer and user selection
# Display results
if computer_input == user_input
  puts "It's a draw. :-| "
elsif computer_input == "rock"
  if user_input == "paper"
    puts "You win"
  else
    puts "You lose!"
  end
elsif computer_input == "paper"
  if user_input == "scissors"
    puts "You win"
  else
    puts "You lose!"
  end
else
  if user_input == "rock"
    puts "You win"
  else
    puts "You lose!"
  end
end

# End game