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

namespace Typing_Speed
{
    class Stopwatch
    {
        private DateTime startTime;
        private DateTime stopTime;
        public double time;

        public void Start()
        {
            startTime = DateTime.Now;
        }

        public void Stop()
        {
            stopTime = DateTime.Now;
            TimeSpan TotalTime = stopTime - startTime;
            time = TotalTime.TotalSeconds;
        }

        public double Display()
        {
            return Math.Round(time, 2);
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            Stopwatch stopwatch = new Stopwatch();
            Random random = new Random();

            string[] sentences = new string[] {"The quick brown fox jumps over the lazy dog."};

            bool exit = false;
            while (exit == false)
            {
                Console.WriteLine("Write the following sentence:");
                Console.WriteLine("----------------------------------\n");
                string sentence = sentences[random.Next(0, sentences.Count())];
                Console.WriteLine(sentence);

                Console.WriteLine("Enter to start!");
                Console.ReadLine();
                stopwatch.Start();
                string input = Console.ReadLine();
                stopwatch.Stop();

                if (string.IsNullOrWhiteSpace(input))
                {
                    exit = true;
                    break;
                }
                else
                {
                    string[] words = input.Trim().Split(' ');
                    string[] sentenceRandom = sentence.Split(' ');
                    int mistakes = 0;

                    if (sentenceRandom.Count() > words.Count())
                    {
                        for (int i = 0; i < sentenceRandom.Count(); i++)
                        {
                            try
                            {
                                if (!(sentenceRandom[i].Equals(words[i])))
                                {
                                    mistakes++;
                                }
                            }
                            catch (IndexOutOfRangeException)
                            {
                                mistakes++;
                            }
                        }
                    }
                    else
                    {
                        for (int i = 0; i < words.Count(); i++)
                        {
                            try
                            {
                                if (!(sentenceRandom[i].Equals(words[i])))
                                {
                                    mistakes++;
                                }
                            }
                            catch (IndexOutOfRangeException)
                            {
                                mistakes++;
                            }
                        }
                    }

                    double speed = sentenceRandom.Count() / stopwatch.time;

                    int characters = 0;
                    foreach (char character in input)
                    {
                        characters++;
                    }

                    Console.WriteLine("\n---------------------------");
                    Console.WriteLine("Mistakes made: {0}", mistakes);
                    Console.WriteLine("Words typed: {0}", words.Count());
                    Console.WriteLine("Characters typed: {0}", characters);
                    Console.WriteLine("Words per second: {0}", Math.Round(speed, 1));
                    Console.WriteLine("Characters per second: {0}", Math.Round(characters / stopwatch.time, 1));
                    Console.WriteLine("---------------------------\n\n");
                }
            }
        }
    }
}