using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        RunBasicNatoTests();

        GiveUserControl();

    }

    // Complete this function

    // Given the input string, write to the console the NATO equivalent

    // of each character in the string.

    // For example, an input of "AB"

    // Should write to the console:

    // Alpha

    // Bravo

    private static void EchoAsNato(string value)

    {

        value.ToUpper();

        for(int i = 0; i < value.Length; i++)

            {

                Console.WriteLine(_natoMapper[value[i]]);

            }

    }

    // Complete this function

    // Allow the user to input they're own value for the EchoAsNato function

    // Do this in a loop so the user can input as many values as they want

    // Exit the program when the user types in "EXIT"

    private static void GiveUserControl()

    {

        Console.WriteLine("Input the letters you would like to convert and press enter: ");

        string userInput = Console.ReadLine().ToUpper();

        while(userInput != "EXIT")

        {

            for(int i = 0; i < userInput.Length; i++)

            {

                Console.WriteLine(_natoMapper[userInput[i]]);

            }

        }   

    }

    // Use this dictionary to convert a character to a nato string

    // For example: _natoMapper['a']

    // Will become: "Alpha"

    private static readonly Dictionary<char, string> _natoMapper

        = new Dictionary<char, string>

    {

        { 'A', "Alpha" },

        { 'B', "Bravo" },

        { 'C', "Charlie" },

        { 'D', "Delta" },

        { 'E', "Echo" },

        { 'F', "Foxtrot" },

        { 'G', "Golf" },

        { 'H', "Hotel" },

        { 'I', "India" },

        { 'J', "Juliett" },

        { 'K', "Kilo" },

        { 'L', "Lima" },

        { 'M', "Mike" },

        { 'N', "November" },

        { 'O', "Oscar" },

        { 'P', "Papa" },

        { 'Q', "Quebec" },

        { 'R', "Romeo" },

        { 'S', "Sierra" },

        { 'T', "Tango" },

        { 'U', "Uniform" },

        { 'V', "Victor" },

        { 'W', "Whiskey" },

        { 'X', "X-ray" },

        { 'Y', "Yankee" },

        { 'Z', "Zulu" },

    };

    private static void Test(string value)

    {

        Console.WriteLine($"Echoing as Nato: {value}");

        EchoAsNato(value);

        Console.WriteLine('\n');

    }

​

    private static void RunBasicNatoTests()

    {

        // Echoing as Nato: Q

        // Quebec

        Test("Q");

        // Echoing as Nato: CAT

        // Charlie

        // Alpha

        // Tango

        Test("CAT");

        // Echoing as Nato: VICTORY

        // Victor

        // India

        // Charlie

        // Tango

        // Oscar

        // Romeo

        // Yankee

        Test("VICTORY");

    }

    private static void RunBonusNatoTests()

    {

        Test("");

        Test("a");

        Test(" ");

    }

}