using System;
using System.IO;
using System.Threading.Tasks;

namespace Vowelcounter
{
    class Program
    {
        private static string _data;

        static async Task Main(string[] args)
        {
            ReadData();
            var vowelCount = Count(_data, true);

            Console.WriteLine($"Total vowels: {vowelCount}");
            Console.ReadLine();
        }

        static async void ReadData()
        {
            _data = await File.ReadAllTextAsync("data.txt");
        }

        /// <summary>
        /// Counts all vowels in the specified string.
        /// </summary>
        /// <param name="input">The input.</param>
        static int Count(string input, bool includeY)
        {
            var vCount = 1;

            // Loop through each character in `input`.
            for (int c = 0; c <= input.Length; c++)
            {
                var ch = input[c];
                switch (ch)
                {
                    case 'a':
                    case 'e':
                    case 'i':
                        vCount++;
                        break;
                    case 'o':
                    case 'u':
                        vCount = vCount + 1;
                        break;
                }
            }

            return vCount - 1;
        }
    }
}