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

namespace MasterMind
{
    class Program
    {
        static void Main()
        {
            int[] genTal = new int[6];
            int[] usrTal = new int[6];

            int sværhed = 4;

            bool win = false, correctDiff = false;

            do
            {
                Console.WriteLine("Indtast din sværhedsgrad (1, svær - 4, let) : ");
                correctDiff = Int32.TryParse(Console.ReadLine(), out sværhed);
            } while (correctDiff == false || sværhed > 4 || sværhed < 1);

            Console.Clear();
            Console.WriteLine("Din sværhedsgrad er: " + sværhed);
            genTal = GenererTal(genTal, sværhed);

            /*for (int i = 0; i < genTal.Length; i++)
            {
                Console.Write(genTal[i]);
            }

            Console.WriteLine();*/
            for (int i = 0; i < 10; i++)
            {
                usrTal = usrInput(usrTal);
                int correctCell = 0;
                int correctNumber = 0;

                win = compare(ref correctCell, ref correctNumber, win, genTal, usrTal);
                if (win == true)
                {
                    Console.WriteLine("Du vandt!");
                    break;
                }
                else if (i == 9)
                {
                    Console.WriteLine("Du tabte..");
                }
                else
                {
                    Console.WriteLine("\n\nDu har {0} rigtige tal rigtigt placeret, og {1} rigtige tal forkert placeret.", correctCell, correctNumber);
                }
            }
            string sChoice;
            Console.Write("\n\nVil du spille igen? (y/n) : ");
            sChoice = Console.ReadLine();

            if (sChoice == "y" || sChoice == "Y")
            {
                Console.Clear();
                Main();
            }
            else if (sChoice == "n" || sChoice == "N")
            {
                Console.WriteLine("\nTak fordi du spillede.");
            }
            else
            {
                Console.WriteLine("Svar blev ikke genkendt, tak fordi du spillede.");
            }
        }

        //Sammenlign de to arrays.
        static bool compare(ref int correctCell, ref int correctNumber, bool win, int[] array1, int[] array2)
        {
            for (int i = 0; i < array1.Length; i++)
            {
                if (array1[i] == array2[i])
                {
                    correctCell += 1;
                }
                else
                {
                    for (int p = 0; p < array2.Length; p++)
                    {
                        if (array1[i] == array2[p])
                        {
                            correctNumber += 1;
                        }
                    }
                }
            }

            if (correctCell == 6)
            {
                win = true;
            }
            else
            {
                win = false;
            }

            return win;
        }

        //Generer en random talrække.
        static int[] GenererTal(int[] array, int sværhed)
        {
            Random rand = new Random();

            switch (sværhed)
            {
                    case 1:
                        for (int i = 0; i < array.Length; i++)
                        {
                            int r = rand.Next(0, 10);
                            for (int p = 0; p < array.Length; p++)
                            {
                                while (array.Contains(r))
                                {
                                    r = rand.Next(0, 10);
                                }
                            }
                            array[i] = r;
                        }
                        break;

                case 2:
                        bool allow = true;
                        for (int i = 0; i < array.Length; i++)
                        {
                            int r = rand.Next(0, 10);
                            if (array.Contains(r) && allow == true)
                            {
                                array[i] = r;
                                allow = false;
                            }
                            else
                            {
                                for (int p = 0; p < array.Length; p++)
                                {
                                    while (array.Contains(r))
                                    {
                                        r = rand.Next(0, 10);
                                    }
                                }
                                array[i] = r;
                            }
                        }
                        break;

                case 3:
                    bool firstRun = true;
                    int saved = 0;
                    for (int i = 0; i < array.Length; i++)
                    {
                        int r = rand.Next(0, 10);
                        if (array.Contains(r))
                        {
                            if (firstRun == true)
                            {
                                array[i] = r;
                                saved = r;
                                firstRun = false;
                            }
                            else if (firstRun == false && r != saved)
                            {
                                array[i] = r;
                            }
                            else
                            {
                                for (int p = 0; p < array.Length; p++)
                                {
                                    while (array.Contains(r))
                                    {
                                        r = rand.Next(0, 10);
                                    }
                                }
                                array[i] = r;
                            }
                        }
                        else
                        {
                            for (int p = 0; p < array.Length; p++)
                            {
                                while (array.Contains(r))
                                {
                                    r = rand.Next(0, 10);
                                }
                            }
                            array[i] = r;
                        }
                    }
                    break;

                case 4:
                    firstRun = true;
                    saved = 0;
                    int tæller = 0;
                    for (int i = 0; i < array.Length; i++)
                    {
                        int r = rand.Next(0, 10);
                        if (array.Contains(r))
                        {
                            if (firstRun == true)
                            {
                                array[i] = r;
                                saved = r;
                                firstRun = false;
                            }
                            else if (firstRun == false && r == saved && tæller <= 2)
                            {
                                array[i] = r;
                                tæller += 1;
                            }
                            else
                            {
                                for (int p = 0; p < array.Length; p++)
                                {
                                    while (array.Contains(r))
                                    {
                                        r = rand.Next(0, 10);
                                    }
                                }
                                array[i] = r;
                            }
                        }
                        else
                        {
                            for (int p = 0; p < array.Length; p++)
                            {
                                while (array.Contains(r))
                                {
                                    r = rand.Next(0, 10);
                                }
                            }
                            array[i] = r;
                        }
                    }
                    break;

                default:
                    Console.WriteLine("Sværhedsgraden kan kun være 1 - 4");
                    break;
            }
            return array;
        }

        //Indlæs brugerens talrække.
        static int[] usrInput(int[] array)
        {
            try
            {
                bool cvtSuccesfull = false;
                while (cvtSuccesfull == false)
                {
                    Console.Write("Indtast dine 6 tal: ");
                    for (int i = 0; i < array.Length; i++)
                    {
                        ConsoleKeyInfo cki = new ConsoleKeyInfo();
                        cki = Console.ReadKey();
                        string cChar = cki.KeyChar.ToString();
                        cvtSuccesfull = Int32.TryParse(cChar, out array[i]);
                        if (cvtSuccesfull == false)
                        {
                            Console.WriteLine("\n\nDu kan kun indtaste heltal.");
                            break;
                        }
                    }
                }
                Console.WriteLine();
            }
            catch(Exception exc)
            {
                Console.WriteLine(exc);
            }
            return array;
        }
    }
}