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

namespace Bagels
{
    class Program
    {
        private Tools _Tools = new Tools();
        private bool _Running;
        private bool _GameOver;
        private int[] _Digits = new int[3] { 0, 0, 0 };
        private int _Score;

        private int AskForGuess(int attempt)
        {
            while (true)
            {
                int guess = _Tools.GetIntInput($"GUESS #{attempt}");
                if (guess < 0)
                    Console.WriteLine("PLEASE GUESS A NON-NEGATIVE NUMBER.");
                else if (guess < 100 || guess > 999)
                    Console.WriteLine("PLEASE GUESS A NUMBER BETWEEN 100 AND 999.");
                else
                    return guess;
            }
        }

        private void DisplayRules()
        {
            Console.WriteLine("I WILL THINK OF A THREE-DIGIT NUMBER. YOU WILL TRY TO");
            Console.WriteLine("GUESS MY NUMBER AND I WILL GIVE YOU CLUES AS FOLLOWS:");
            Console.WriteLine("  PICO   - ONE DIGIT CORRECT BUT IN THE WRONG POSITION");
            Console.WriteLine("  FERMI  - ONE DIGIT CORRECT AND IN THE RIGHT POSITION");
            Console.WriteLine("  BAGELS - NO DIGITS ARE CORRECT\r\n");
            Console.WriteLine("YOU GET TWENTY TRIES BEFORE YOU LOSE.\r\n");
        }

        private void DisplayGameOver()
        {
            Console.WriteLine("OH WELL, THAT WAS TWENTY GUESSES.");
            Console.WriteLine($"MY NUMBER WAS {MakeIntFromArray(_Digits)}.");
            _GameOver = true;
        }

        private int MakeIntFromArray(int[] digits)
        {
            return (digits[0] * 100) + (digits[1] * 10) + digits[2];
        }

        private int[] MakeArrayFromInt(int valIn)
        {
            int hundreds = valIn / 100;
            int tens = (valIn - (hundreds * 100)) / 10;
            int ones = (valIn - (hundreds * 100)) - (tens * 10);
            return new int[] { hundreds, tens, ones };
        }

        private void CreateTheNumber()
        {
            bool gotDigit = false;
            _Digits[0] = _Tools.GenerateRandomNumber(1, 9, false);
            while(!gotDigit)
            {
                _Digits[1] = _Tools.GenerateRandomNumber(0, 9, false);
                if (_Digits[1] != _Digits[0]) gotDigit = true;
            }
            gotDigit = false;
            while (!gotDigit)
            {
                _Digits[2] = _Tools.GenerateRandomNumber(0, 9, false);
                if (_Digits[2] != _Digits[0] && _Digits[2] != _Digits[1]) gotDigit = true;
            }
        }

        private bool CheckGuess(int guess)
        {
            int[] temp = MakeArrayFromInt(guess);
            int[] vals = new int[3] { 0, 0, 0 };
            for (int d = 0; d < 3; d++)
                if (temp[d] == _Digits[d]) vals[d] = 1;
            if (MakeIntFromArray(vals) == 111) return true;
            if(vals[0] == 0)
                if (temp[0] == _Digits[1] || temp[0] == _Digits[2]) vals[0] = 2;
            if (vals[1] == 0)
                if (temp[1] == _Digits[0] || temp[1] == _Digits[2]) vals[1] = 2;
            if (vals[2] == 0)
                if (temp[2] == _Digits[0] || temp[2] == _Digits[1]) vals[2] = 2;
            if (MakeIntFromArray(vals) == 0) Console.WriteLine("BAGELS");
            else
            {
                string display = "";
                for(int d = 0;d < 3; d++)
                {
                    if (vals[d] == 1) display += "FERMI ";
                    else if (vals[d] == 2) display += "PICO ";
                }
                Console.WriteLine(display);
            }
            return false;
        }

        public void Run()
        {
            Console.WriteLine("*** BAGELS : C# ***");
            int guess = 0;
            int attempt;
            _Running = true;
            _Score = 0;
            if (_Tools.AskToSeeTheRules()) DisplayRules();
            while(_Running)
            {
                attempt = 1;
                _GameOver = false;
                CreateTheNumber();
                while(!_GameOver)
                {
                    Console.WriteLine("OK, I HAVE A NUMBER IN MIND.");
                    guess = AskForGuess(attempt);
                    if(CheckGuess(guess))
                    {
                        Console.WriteLine("YOU GOT IT!!!");
                        _Score++;
                        _GameOver = true;
                    }
                    else
                    {
                        attempt++;
                        if (attempt > 20)
                            DisplayGameOver();
                    }
                }
                Console.WriteLine("*** GAME OVER ***");
                _Running = _Tools.AskToPlayAgain();
            }
            Console.WriteLine($"A {_Score} POINT BAGELS BUFF!");
            Console.WriteLine("HOPE YOU HAD FUN. BYE!");
        }
        static void Main(string[] args)
        {
            Program p = new Program();
            p.Run();
            Console.ReadLine();
        }
    }
}