// ---------------------------------------------------------------------------
// BestGuess.cpp
//
// Written By:     YourNameGoesHere
// Last Modified:  DueDateGoesHere
//
// Description:
// Delete this and
// Write something appropriate here that describes what the program does
// ---------------------------------------------------------------------------

#include <iostream>  // include iostream to be able to use std::cin and std::cout
#include <cstdlib>   // include cstdlib for use of srand() and rand() functions
#include <ctime>     // include ctime for use of time() function
using namespace std; // make use of the appropriate namespace for cin and cout

// ---------------------------------------------------------------------------
// Declare global function prototypes to be used by main() function
// ---------------------------------------------------------------------------
int GetGuess();
int CalcRelation(int guess, int secretNum);

// ---------------------------------------------------------------------------
// Declare and define global constants
// ---------------------------------------------------------------------------
const int QUIT_REQUEST = -999; // declare and define QUIT_REQUEST as a const int with value -999


// ---------------------------------------------------------------------------
// main() --- it all begins here
// ---------------------------------------------------------------------------
int main() 
{
   // Setup - Seed the random number generator
   srand(static_cast<unsigned int>(time(0)));

   // Setup - Init secretNumber = some random number from 1 to 100, 
   // and Init other local vars: tries = 0, guess = 0, relation = QUIT_REQUEST
   int secretNumber = rand() % 100 + 1;
   int tries = 0;
   int guess = 0;
   int relation = QUIT_REQUEST;

   // Setup - Offer initial welcome screen with directions
   cout << "Welcome to Best Guess!!!\n\n";
   cout << "I have selected a number from 1 to 100.\n";
   cout << "Try to guess it.\n\n";

   // Create the Game Loop
   do
   {
      // Call a function to ask the user for a number and return it
      // Store the result in the local variable named: guess
      guess = GetGuess();
      
      // Increment local variable: tries
      ++tries;

      // Call a function 
      //    that takes the guess and secretNumber as parameters
      //    that returns -1 for too low, 1 for too high, 0 for match, 
      //    and const value: QUIT_REQUEST for quit (i.e. guess <= 0)
      // Store the return value in local variable named: relation
      relation = CalcRelation(guess, secretNumber);
      
      // Process the value of the variable relation accordingly
      //    Use a switch statement as outlined based on
      //    the value of local variable named: relation
      switch (relation)
      {
         case QUIT_REQUEST:
            cout << "You want to quit... awwwww but why?\n";
            cout << "See you later.\n";
            break;
            
         case 1:
            cout << "Too High. Try again\n";
            break;
            
		case -1:
            cout << "Too Low. Try again\n";
            break;

		case 0:
            cout << "\nAmazing! How did you know?\n";
            cout << "You got it in " << tries << " guesses.\n";
            break;

        default:
		  cout <<"\nERROR --- relation == " << relation << endl;
	  } // end switch
	  
   } while ( (relation != 0) && (relation != QUIT_REQUEST) );

   return 0;   // return 0 to indicate success to the operating system
} // end main()

// ---------------------------------------------------------------------------
// ---------------------------------------------------------------------------
// Definition of Global Functions follows
// ---------------------------------------------------------------------------
// ---------------------------------------------------------------------------
// ---------------------------------------------------------------------------


// ---------------------------------------------------------------------------
// GetGuess
// Asks the user for a number and returns it
// Also indicates that a guess of zero will quit out of the game
// ---------------------------------------------------------------------------
int GetGuess()
{
   int guess;
   cout << "What number do you guess (0 to quit): ";
   cin >> guess;
   
   return guess;
}


// ---------------------------------------------------------------------------
// CalcRelation
// Takes integers: guess and secretNum as input parameters
// Returns -1 for too low, 1 for too high, 0 for match, 
// and const value: QUIT_REQUEST for quit
// quit will be triggered if gues is <= 0
// ---------------------------------------------------------------------------
int CalcRelation(int guess, int secretNum)
{
   int retVal = QUIT_REQUEST;   // default retVal to QUIT_REQUEST
   
   if (guess <= 0)
   {
	   retVal = QUIT_REQUEST;
   }
   else if (guess > secretNum)
   {
      retVal = 1;   // 1 for too high
   }
   else if (guess < secretNum)
   {
      retVal = -1;  // negative 1 for too low
   }
   else
   {
      retVal = 0;   // zero for match
   }
   
   return retVal;
}