using System;

using System.Collections.Generic;

​

namespace HelloWorl

{

    public class Riddle

    {

        private string npcName;

        private string riddle;

        private string correctAnswer;

        public string getNpcName() 

        { 

            return this.npcName; 

        }

        public Riddle setNpcName(string name)

        {

            this.npcName = name;

            return this;

        }

        public string getRiddle() 

        { 

            return this.riddle; 

        }

        public Riddle setRiddle(string riddle)

        {

            this.riddle = riddle;

            return this;

        }

        public string getCorrectAnswer() 

        { 

            return this.correctAnswer; 

        }

        public Riddle setCorrectAnswer(string correctAnswer)

        {

            this.correctAnswer = correctAnswer;

            return this;

        }       

    }

    public class Program

    {

        public void Main(Program obj) 

        {

            bool gameover = false;

            List<int> blockedDirections = new List<int>();

            while (!gameover) {

                if (blockedDirections.Count == 4) {

                    Console.WriteLine("You are stuck and died");

                    gameover = true;

                    continue;

                }

                List<string> choices = new List<string>(["North", "East", "South", "West"]);

                foreach (int blocked in blockedDirections) {

                    choices.RemoveAt(blocked);

                }                       

                Console.WriteLine(@$"Choose an exit.

                    {String.Join(", ", choices.ToArray())}

                ");

                int direction = Convert.ToInt32(Console.ReadLine());

                Riddle riddle = this.createRiddle(direction);

                if (blockedDirections.Contains(direction)) {    

                    Console.WriteLine("Exit is sealed. ");

                    continue;

                }

                gameover = this.askRiddle(riddle);

                if (!gameover) {

                    blockedDirections.Add(direction);

                }

            }

            Console.WriteLine("Game over. Thanks for playing.");

        }

        private Riddle createRiddle(int index)

        {

            switch (index) {

                case 0:

                    return (new Riddle())

                        .setNpcName("Chartes")

                        .setRiddle("I have forests, but no trees. I have rivers, but no waters. I have cities but no buildings. What am I?")

                        .setCorrectAnswer("map");

                case 1:

                    return (new Riddle())

                        .setNpcName("Saggitarius")

                        .setRiddle("The more you take from me, the bigger I become. What am I?")

                        .setCorrectAnswer("hole");      

                case 2:

                    return (new Riddle())

                        .setNpcName("Imago")

                        .setRiddle("I can't be seen but I can be heard. I will not speak, unless spoken to. What am I?")

                        .setCorrectAnswer("echo");  

                case 3:

                    return (new Riddle())

                        .setNpcName("Imago")

                        .setRiddle("I'm black when I'm bought, red when I'm used, and gray when I'm thrown away. What am I?")

                        .setCorrectAnswer("coal");

            }

            return null;

        }

        private bool askRiddle(Riddle riddle)

        {

            Console.WriteLine($"My name is {riddle.getNpcName()}, and this is my riddle. Should you get it wrong, this exit will forever be impassable to you.");

            Console.WriteLine(riddle.getRiddle());

            string playerAnswer = Console.ReadLine().ToLower();

            if (playerAnswer != riddle.getCorrectAnswer()) {

                Console.WriteLine("The exit is now sealed. Turn away, for your wisdom did not prove true.");

                return false;

            }

            Console.WriteLine("The path is open, you may pass.");

            return true;

        }

    }

}