using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
namespace KawaiiDesu
{
    class Program
    {
        static List<Action> actions = new List<Action>() { Path1, Path2, Path3, Path4, Path5, Path6, Path7, PassInput, averageStudents, tallestDude, randomNum, EETisCrap, hardOne, hardTwo, hardThree, hardFour };
        static void Main(string[] args)
        {
            while (true)
            {
                try
                {
                    var num = (int)vignekit.numInput("\n    Index cesty: ");
                    if (num > actions.Count-1) throw new Exception("       Neplatný index (0-"+(actions.Count-1)+")");
                    actions[num].Invoke();
                }
                catch (Exception ex)
                {
                    Console.ForegroundColor = ConsoleColor.Red;
                    Console.WriteLine(ex.Message);
                    Console.ResetColor();
                }
            }
        }
        static void Path1()
        {
            Random gen = new Random();
            int over5 = 0, even = 0, total = 0;
            for (var i = 0; i < 10; i++)
            {
                int value = gen.Next(11);
                if (value > 5) over5++;
                if (value % 2 == 0) even++;
                total += value;
            }
            Console.WriteLine(@"     {0} jich bylo větší než 5.
     {1} jich bylo sudých.
     {2} je jejich součet.", over5, even, total);
        }
        static void Path2()
        {
            Random gen = new Random();
            int counter = 0;
            for (var i = 0; i < 10; i++) {
                int value = gen.Next(-100, 101);
                if (value > 10 && value < 50) counter++;
            }
            Console.WriteLine("    {0} čísel je v rozhraní 10-50", counter);
        }
        static void Path3(){
            int counter = 0;
            for (var i = 0; i < 10; i++)
            {
                float value = vignekit.numInput("      Zadej " + (i + 1) + ". číslo: ");
                if (value > 10 && value < 50) counter++;
            }
            Console.WriteLine("    {0} čísel je v rozhraní 10-50", counter);
        }
        static void Path4(){
            Random gen = new Random();
            HashSet<int> nums = new HashSet<int>();
            while (nums.Count < 6)
            {
                nums.Add(gen.Next(1, 50));
            }
            Console.WriteLine("\n    [ {0} ]", string.Join(", ", nums));
        }
        static void Path5()
        {
            Random gen = new Random();
            int attempts = 10, wrong = 0;
            for (var i = 0; i < attempts; i++) {
                int num1 = gen.Next(11), num2 = gen.Next(11);
                int answer = (int)vignekit.numInput("    "+num1+" * "+num2+" = ");
                if (answer != num1 * num2)
                {
                    wrong++;
                    Console.WriteLine("      Špatně...");
                }
            }
            Console.WriteLine("    {0} chyb", wrong);
        }
        static void Path6(){
            int dice = new Random().Next(1, 7), attempts = 0;
            while (true)
            {
                int val = (int)vignekit.numInput("    Co jsem hodil za číslo? ");
                if (val == dice)
                    break;
                else
                    attempts++;
                Console.WriteLine("     Špatně.");
            }
            Console.WriteLine("     Správně! Uhádls to na {0}. pokus", attempts+1);
        }
        static void Path7(){
            Random gen = new Random();
            int illc = (int)vignekit.numInput("  Kolikrát mám hodit kostkou? ");
            int[] calc = new int[6];
            for (var i = 0; i < illc; i++) {
                calc[gen.Next(0, 6)]++;
            }

            for (var i = 0; i < calc.Length; i++) {

                Console.WriteLine("    {0} padlo {1}%", i + 1, (float)calc[i] / illc *100);
            }
        }

        //index 7 - 1. priklad
        static void PassInput()
        {
            bool accepted = false;
            int attempts = 0;
            string pass = "hehe";
            while (attempts < 2) {
                Console.Write("\n    Heslo: ");
                accepted = Console.ReadLine() == pass;
                if (accepted) break;
                Console.WriteLine("Invalid Password."); attempts++;
            }
            if (accepted)
                Console.WriteLine("Permission granted.");
            else
                Console.WriteLine("Permission denied.");
        }
        //index 8 - 2. priklad
        static void averageStudents()
        {
            List<int> nums = new List<int>();
            int lastNum = 1;
            while (lastNum != 0) {
                lastNum = (int)vignekit.numInput("   Zadej počet žáků: ");
                if (lastNum > 0) nums.Add(lastNum);
            }
            Console.WriteLine("Průměrný počet žáků ve třídě: {0}", (nums.Count == 0) ? "nikdo do školy nechodí." : ((int)nums.Average()).ToString());
        }
        //index 9 - 5. priklad
        static void tallestDude() {
            bool keepGoing = true;
            string recordName = ""; float recordHeight = -1;
            while (keepGoing) {
                Console.Write("\n\nZadej jméno studenta: ");
                string name = Console.ReadLine();
                if (string.IsNullOrWhiteSpace(name)) break;
                float height = vignekit.numInput("Zadej výšku studenta: ");

                if (height > recordHeight)
                {
                    recordName = name;
                    recordHeight = height;
                }
            }
            Console.WriteLine("  Nejvyšší člověk je {0}, který je {1}m vysoký", recordName, recordHeight);
        }
        //index 10 - 7. priklad
        static void randomNum() {
            int dice = new Random().Next(1, 11), attempts = 0;
            while (true)
            {
                int val = (int)vignekit.numInput("    Co jsem si vymyslel za číslo? ");
                if (val == dice)
                    break;
                else
                    attempts++;
                Console.WriteLine("     Špatně.");
            }
            Console.WriteLine("     Správně! Uhádls to na {0}. pokus", attempts + 1);
        }
        //index 11 - 8. priklad
        static void diceThrower() {
            Random gen = new Random(); int attempts = 0;
            while (true) {
                attempts++;
                int newNum = gen.Next(1, 7);
                if (newNum == 6) break;
            }
            Console.WriteLine(" Padlo mi to po {0} pokusech.", attempts);
        }
        //index 12 - 3. priklad
        static void EETisCrap()
        {
            List<int> nums = new List<int>(); int lastNum = 1, overboard = 0;

            while (lastNum != 0) {
                lastNum = (int)vignekit.numInput("   Zadej částku: ");
                if (lastNum > 0) nums.Add(lastNum);
                if (lastNum > 100) overboard++;
            }

            Console.WriteLine("Utratil jsi {0}Kč, z toho bylo {1} nákupů nad 100Kč.", nums.Sum(), overboard);
        }
        //index 13 - 1. tezky priklad
        static void hardOne()
        {
            string output = "";
            for (var i = 0; i < 10; i++) {
                output += (i+1).ToString();
                Console.WriteLine(output);
            }
        }
        //index 14 - 2. tezky priklad
        static void hardTwo()
        {
            Random gen = new Random();
            for (var i = 0; i < 20; i++) {
                Console.WriteLine(new String('*', gen.Next(20)));
            }
        }
        //index 15 - 3. tezky priklad
        static void hardThree()
        {
            List<int> primes = new List<int>();
            for (var i = 0; i < 1000; i++) {
                if (vignekit.isPrime(i)) primes.Add(i);
            }
            Console.WriteLine("\n    Prvočísla v rozhraní 0-1000:\n      [ {0} ] ", string.Join(", ", primes));
        }
        //index 16 - 4. tezky priklad
        static void hardFour()
        {
            for (var i = 0; i < 10; i++)
            {
                List<int> nums = new List<int>();
                for (var y = 0; y < 10; y++)
                {
                    nums.Add((y + 1) * (i+1));
                }
                Console.WriteLine("[ {0} ]", string.Join(", ", nums));
            }
        }
    }
    class vignekit
    {
        public static float numInput(string prompt = "Zadej číslo: ", string invalid = "Neplatné číslo.")
        {
            bool isValid = false; float val = 0;    //celkem na tom nezalezi, z loopu by nevylezl
            while (!isValid)
            {
                Console.Write("\n{0}", prompt);
                isValid = float.TryParse(Console.ReadLine(), out val);
                if (!isValid)
                {
                    Console.WriteLine(invalid);
                }
            }
            return val;
        }
        public static bool isPrime(float n)
        {
            if (n <= 1) return false;
            for (var i = 2; i < n; i++) {
                if (n % i == 0) return false;
            }
            return true;
        }
    }
}