using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Games {


    /// <summary>
    /// Plays a game of two-up, using Simple rules or Complex rules
    /// </summary>
    class TwoUp {

        //create two coin objects
        Coin coin1 = new Coin();
        Coin coin2 = new Coin();

        //initialise
        bool coinOneHeads;
        bool coinTwoHeads;
        int playerWins = 0;
        int houseWins = 0;

        string answer = "";
        string yes = "Y";
        string no = "N";

        /// <summary>
        /// asks the user if (s)he whould like to play again,
        /// reads the response and sets it as variable 'answer'
        /// answer is then evaluated and action is taken further
        /// in the code in the 'Play' method.
        /// </summary>
        private void PlayAgain() {
            // displays wins/loses
            // asks and evaluates if the player would like to play again
            Console.WriteLine("You have {0} wins and I have {1} wins.", playerWins, houseWins);
            Console.WriteLine("Would you like to play again? (Y/N)");
            answer = Console.ReadLine();

            while ((answer.ToUpper() != yes) && (answer.ToUpper() != no)) {
                Console.WriteLine("Please enter the correct response, (Y/N)");
                answer = Console.ReadLine();
            }//end while

            if (answer == no) {

                Console.WriteLine("Thank you for playing");

            }//end if
        }//end PlayAgain


        /// <summary>
        /// Flips the two coins and
        /// determines the facevalue of both
        /// and assigns the variables
        /// coinXIsHeads to be true or false.
        /// </summary>
        private void FlipCoinsAndCheck() {

            coin1.Flip();

            if (coin1.IsHeads() == true) {
                coinOneHeads = true;
            } else if (coin1.IsHeads() == false) {
                coinOneHeads = false;
            }//end else if

            coin2.Flip();

            if (coin2.IsHeads() == true) {
                coinTwoHeads = true;
            } else if (coin2.IsHeads() == false) {
                coinTwoHeads = false;
            }//end else if

        }//end FlipCoinsAndCheck

        /// <summary>
        /// Plays TwoUp by the simple rules
        /// as long as the menuOption is equal
        /// to one.
        /// </summary>
        private void SimpleRules() {
            const int WIN = 1;

            // flip both coins and checks facevalue
            FlipCoinsAndCheck();

            // if 'IsHeads' is true for both
            // player wins
            if ((coinOneHeads == true) && (coinTwoHeads == true)) {
                Console.WriteLine("Your threw Heads - You've won!");
                playerWins = playerWins + WIN;

            // else if 'IsHeads' is false for both
            // house/computer wins
            } else if ((coinOneHeads == false) && (coinTwoHeads == false)) {
                Console.WriteLine("Your threw Tails - I've won!");
                houseWins = houseWins + WIN;
                //end else if

            // otherwise, while'IsHeads' is true for one
            // and not the other: flip again
            } while (((coinOneHeads == true) && (coinTwoHeads == false)) ||
                ((coinOneHeads == false) && (coinTwoHeads == true))) {
                Console.WriteLine("Your threw Odds - Flip again!");
                FlipCoinsAndCheck();
            }//end while

        }//end SimpleRules


        /// <summary>
        /// Plays TwoUp by the complex rules
        /// as long as the menuOption is equal
        /// to two.
        /// </summary>
        private void ComplexRules() {

            //initialise counters
            int headsCounter = 0;
            int tailsCounter = 0;
            int counterIsThree = 3;

            // continue flipping coins and checking
            // for the faceValue to be heads/tails
            // until double heads/tails is
            // flipped thrice.
            do {
                FlipCoinsAndCheck();

                if ((coinOneHeads == true) && (coinTwoHeads == true)) {
                    Console.WriteLine("Your threw Heads!");
                    headsCounter++;

                } else if ((coinOneHeads == false) && (coinTwoHeads == false)) {
                    Console.WriteLine("Your threw Tails!");
                    tailsCounter++;
                    //end else if

                } else if (((coinOneHeads == true) && (coinTwoHeads == false)) ||
                    ((coinOneHeads == false) && (coinTwoHeads == true))) {
                    Console.WriteLine("Your threw Odds!");

                }//end else if
            }while((headsCounter != counterIsThree) && (tailsCounter != counterIsThree));
            //end while

            // if double heads is flipped three times, player wins!
            // else if double tails is flipped three times, player loses!
            if (headsCounter == counterIsThree) {
                playerWins++;
            } else if (tailsCounter == counterIsThree) {
                houseWins++;

            }//end else if

        }//end ComplexRules


        /// <summary>
        /// Plays the game by calling the
        /// game methods and 'play again' method
        /// and by the chosen rules as long as
        /// the variable 'answer' remains yes.
        /// </summary>
        /// <param name="menuOption"></param>
        public void Play(int menuOption) {

            //initialise variables
            const int SIMPLERULES = 1;
            const int COMPLEXRULES = 2;

            // menuoption will be determined as one
            // and therefore a game of two up
            // with simple rules, until the player
            // choses not to
            if (menuOption == SIMPLERULES) {
                do {
                    SimpleRules();
                    PlayAgain();
                } while (answer == yes);

            // otherwise menuoption is two and therefore
            // play by the complex rules until the player
            // decides not to play anymore.
            } else if (menuOption == COMPLEXRULES) {
                do {
                    ComplexRules();
                    PlayAgain();
                } while (answer == yes);

            } else {
                Console.WriteLine("If this message appears, then there has been an error with the menuOption");
            }




        }//end play
    } //end class TwoUp
}//end Games