require 'sinatra'
# before we process a route, we'll set the response as
# plain text and set up an array of viable moves that
# a player (and the computer) can perform
before do
	content_type :txt
	@defeat = {rock: :scissors, paper: :rock, scissors: :paper}
	@throws = @defeat.keys
end

get '/throw/:type' do
	# the params[] hash stores querystring and form data.
	player_throw = params[:type].to_sym
	# in the case of a player providing a throw that is not valid,
	# we halt with a status code of 403 (Forbidden) and let them
	# know they need to make a valid throw to play.
	if [email protected]?(player_throw)
		halt 403, "You must throw one of the following: #{@throws}"
end

# now we can select a random throw for the computer
computer_throw = @throws.sample
# compare the player and computer throws to determine a winner
if player_throw == computer_throw
	"You tied with the computer. Try again!"
elsif computer_throw == @defeat[player_throw]
	"Nicely done; #{player_throw} beats #{computer_throw}!"
else
	"Ouch; #{computer_throw} beats #{player_throw}. Better luck next time!"
end