"""
Week 4 practice project template for Python Programming Essentials
Rock-paper-scissors-lizard-Spock
"""

import random

# The key idea of this program is to equate the strings
# "rock", "paper", "scissors", "lizard", "Spock" to numbers
# as follows:
#
# 0 - rock
# 1 - Spock
# 2 - paper
# 3 - lizard
# 4 - scissors

# helper functions

def name_to_number(name):
    """
    Given string name, return integer 0, 1, 2, 3, or 4
    corresponding to numbering in video
    """

    # convert name to number using if/elif/else
    # don't forget to return the result!
    if name == 'rock':
        return 0
    elif name == 'Spock':
        return 1
    elif name == 'paper':
        return 2
    elif name == 'lizard':
        return 3
    elif name == 'scissors':
        return 4
    else:
        return "Name operation not found"

def number_to_name(number):
    """
    Given integer number (0, 1, 2, 3, or 4)
    corresponding name from video
    """

    # convert number to a name using if/elif/else
    # don't forget to return the result!

    if number == 0:
        return 'rock'
    elif number == 1:
        return 'Spock'
    elif number == 2:
        return 'paper'
    elif number == 3:
        return 'lizard'
    elif number == 4:
        return 'scissors'
    else:
        return "Number operation not found"


def rpsls(player_choice):
    """
    Given string player_choice, play a game of RPSLS
    and print results to console
    """

    # print a blank line to separate consecutive games

    # print out the message for the player's choice

    # convert the player's choice to player_number using the function name_to_number()

    # compute random guess for comp_number using random.randrange()

    # convert comp_number to comp_choice using the function number_to_name()

    # print out message for computer's choice

    # compute difference of player_number and comp_number modulo five

    # use if/elif/else to determine winner and print winner message

    print ('')
    print (player_choice)
    choice_to_num = name_to_number(player_choice)

    # compute random guess for comp_number using random.randrange()

    comp_number = random.randrange(0, 5)

    # convert comp_number to comp_choice using the function number_to_name()
    comp_choice = number_to_name(comp_number)
    # print out message for computer's choice
    print (comp_choice)

    # compute difference of player_number and comp_number modulo five
    difference = (comp_number - choice_to_num)%5
    # use if/elif/else to determine winner and print winner message
    if difference == 0:
        print ("Player and computer tie")
    elif difference == 1 or difference == 2:
        print ("Computer wins")

    else:
        print ('Player wins')


# test your code
rpsls("rock")
rpsls("Spock")
rpsls("paper")
rpsls("lizard")
rpsls("scissors")

# always remember to check your completed program against the grading rubric