'''lecture_22_racquetball.py
Build a terminal-based racquetball game simulation using top-down design
Oliver W. Layton
CS 151: Computational Thinking: Visual Media
Fall 2020

Rules:
- Players hit ball back and forth in the count.
- Game starts by a player serving, like tennis.
- Game played by players hitting ball back and forth (player A hits, then B, then A, then B...)
Back and forth is called rally (like in Tennis).
- The rally ends when one player fails to hit the ball during a rally
- The point ends when the rally ends.
    - The loser the one who failed to hit ball back during the rally.
    - If the loser was the one who served, no points won or lost...the other serves now.
        - e.g. if B was serving and fails to hit ball, now A serves.
    - If the server wins, that player gets a point.
- IMPORTANT: Game ends when one player gets 15 points.
- Rule: Player A always starts serving

Question: If player A and B played in a championship (many games) who would win?

print('This program simulates a game of racquetball between two',
        'players called A and B. The abilities of each player is',
        'indicated by a probability (number between 0 and 1) that',
        'the player wins the point when serving. Player A always',
        'has the first serve.')
'''


def printInstructions():
    print('This program simulates a game of racquetball between two',
          'players called A and B. The abilities of each player is',
          'indicated by a probability (number between 0 and 1) that',
          'the player wins the point when serving. Player A always',
          'has the first serve.')


def getUserInput():
    probWinA = float(input('Please enter the prob Player A wins a point>>>'))
    probWinB = float(input('Please enter the prob Player B wins a point>>>'))
    nGames = int(input('How many games should we play?>>>'))
    return probWinA, probWinB, nGames


def printResults(gamesAWon, gamesBWon):
    totalGames = gamesAWon + gamesBWon
    print('Player A won', gamesAWon, 'games (', 100*gamesAWon/totalGames, 'percent)')
    print('Player B won', gamesBWon, 'games (', 100*gamesBWon/totalGames, 'percent)')


def main():
    # pseudo code: English words describing what to do to solve the problem
    
    # 1. Print out instructions about what this program does and what to enter
    # DONE!
    printInstructions()
    
    # 2. Get user input: need to know (probability that player A wins point), (prob player B wins point)
    # how many games we are playing.
    # DONE!
    probWinA, probWinB, nGames = getUserInput()

    # 3. Simulate the games
    gamesAWon, gamesBWon = simulateNGames(probWinA, probWinB, nGames)

    # 4. Print out the results: how many games player A and player B won the championship
    # DONE!
    printResults(gamesAWon, gamesBWon)


if __name__ == '__main__':
    main()