#include <iostream>
#include <string>
#include <cstdlib>
#include <ctime>
#include <iomanip>

using namespace std;

string setBoard();

int main()
{
    string guess; //the player's guess will be stored
    string spot; //where colors will be randomly assigned
    string chkSpot; //checks how accurate the player's guess is
    char again='y'; //Variable that user input will determine if he plays again

    spot=setBoard();

    cout<<"|| ["<<"?"<<"]["<<"?"<<"]["<<"?"<<"]["<<"?"<<"] || ";
    cout<<"== [ "<<"?"<<" "<<"?"<<" "<<"?"<<" "<<"?"<<" ]";
    cout<<"   -- CHOICES: R B G Y -- "<<endl;
    do{
        cout<<"Enter your guess: ";
        getline(cin,guess);

        //Checks for valid input
        while(guess.size()!=4)
        {   cout<<"Invalid input. Please type in four letters"<<endl;
            cout<<"Enter your guess: ";
            getline(cin,guess);
        }

    //for loop checks each spot to see how it corresponds with the player's
    //guess, and then will assign O or X to a variable that will output
    //during the game so that the player can know how accurate his guess was
        for (int j=0; j<4; j++)
        {
            (guess[j]==spot[j]) ? (chkSpot[j]='O') : (chkSpot[j]='X');
        }

    //if statement checks if user guessed the colors assigned to each
    //spot on the board correctly. If the player is successful, tell em.
    //if not, tell em.
            if (chkSpot[0]=='O'&&chkSpot[1]=='O'&&chkSpot[2]=='O'&&chkSpot[3]=='O')
            {
                cout<<"YOU WIN"<<endl;

                cout<<"|| ["<<spot[0]<<"]["<<spot[1]<<"]["<<spot[2]<<"]["<<spot[3]<<"] || ";
                cout<<"== [ "<<chkSpot[0]<<" "<<chkSpot[1]<<" "<<chkSpot[2]<<" "<<chkSpot[3]<<" ]"<<endl;
                cout<<endl;
                cout<<"Would you like to play again on a new board? Enter 'y' for yes, or anything else to quit."<<endl;
                spot=setBoard();
                cin>>again;
            }
            else
            {

            cout<<"|| ["<<"?"<<"]["<<"?"<<"]["<<"?"<<"]["<<"?"<<"] || ";
            cout<<"== [ "<<chkSpot[0]<<" "<<chkSpot[1]<<" "<<chkSpot[2]<<" "<<chkSpot[3]<<" ]";
            cout<<"   -- CHOICES: R B G Y -- "<<endl;
            }

    }while(again=='y'||again=='Y');

    return 0;
}//end of main

string setBoard(){
    string spot; //where colors will be randomly assigned
    string chkSpot; //checks how accurate the player's guess is
    int boardSet; //where random number assignment (1-4) will be stored
    int repeat[4]={}; //tests for number repetition
srand(time(NULL));

    //for loop for randomizing the board
    for (int i=0; i<4; i++)
    {
        boardSet=(rand() % 4) + 1;

        //first if test will test if the random number is identical to any previous random number.
        //if the random number IS equal to any previous ones, it will decrement 'i'
        if ((boardSet==repeat[0])||(boardSet==repeat[1])||(boardSet==repeat[2])||(boardSet==repeat[3]))
        {
            //decrements so that the for loop will run an extra loop so that it can
            //assign a number that hasn't already been taken
            i--;
        }
        //if the random number is unique, it assigns it to a spot on the board
        else{
        //each number 1-4 corresponds to a color that will be assigned to a spot
        //on the board
        switch (boardSet)
        {
            case 1: {
                spot[i]='R'; //Assigns red to a spot
                chkSpot[i]=spot[i]; //Assigns red to check for if the user guessed correctly.
                repeat[i]=boardSet; //assigns number 1 in repeat variable so it can test for future repeats
            break;
            }
            case 2: {
                spot[i]='B'; //Assigns blue to a spot
                chkSpot[i]=spot[i]; //Assigns blue to check for if the user guessed correctly.
                repeat[i]=boardSet; //assigns number 2 in repeat variable so it can test for future repeats
                break;
            }
            case 3: {
                spot[i]='Y'; //Assigns yellow to a spot
                chkSpot[i]=spot[i]; //Assigns yellow to check for if the user guessed correctly.
                repeat[i]=boardSet; //assigns number 3 in repeat variable so it can test for future repeats
                break;
            }
            case 4: {
                spot[i]='G'; //Assigns green to a spot
                chkSpot[i]=spot[i]; //Assigns green to check for if the user guessed correctly.
                repeat[i]=boardSet; //assigns number 4 in repeat variable so it can test for future repeats
                break;
            }
        }//ends switch
        }//ends else statement
    }//ends for loop
    return spot;
}