using System;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.DependencyInjection;

namespace WorkTimeTracker
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc();
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseRouting();
            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllerRoute(
                    name: "default",
                    pattern: "{controller=Home}/{action=Index}/{id?}");
            });
        }
    }

    public class HomeController : Controller
    {
        private readonly Dictionary<string, TimeSpan> _employeeTimeRecords = new Dictionary<string, TimeSpan>();

        public IActionResult Index()
        {
            return View();
        }

        [HttpPost]
        public IActionResult RegisterArrival(string name)
        {
            if (!_employeeTimeRecords.ContainsKey(name))
            {
                _employeeTimeRecords[name] = DateTime.Now.TimeOfDay;
                ViewBag.Message = $"Приход на работу зарегистрирован для сотрудника {name}";
            }
            else
            {
                ViewBag.Message = "Ошибка: Сотрудник уже зарегистрирован на работе";
            }

            return View("Index");
        }

        [HttpPost]
        public IActionResult RegisterDeparture(string name)
        {
            if (_employeeTimeRecords.ContainsKey(name))
            {
                TimeSpan arrivalTime = _employeeTimeRecords[name];
                TimeSpan workDuration = DateTime.Now.TimeOfDay - arrivalTime;

                ViewBag.Message = $"Сотрудник {name} отработал {workDuration.TotalHours:F2} часов";
                _employeeTimeRecords.Remove(name);
            }
            else
            {
                ViewBag.Message = "Ошибка: Сотрудник не зарегистрирован на работе";
            }

            return View("Index");
        }

        [HttpPost]
        public IActionResult DisplayTimeReport()
        {
            if (_employeeTimeRecords.Count == 0)
            {
                ViewBag.Message = "Нет зарегистрированных сотрудников";
            }
            else
            {
                ViewBag.Message = "Отчет по рабочему времени:<br/>";
                foreach (var record in _employeeTimeRecords)
                {
                    ViewBag.Message += $"Сотрудник: {record.Key}, Время прихода: {record.Value}<br/>";
                }
            }

            return View("Index");
        }
    }

    public class Program
    {
        public static void Main(string[] args)
        {
            CreateHostBuilder(args).Build().Run();
        }

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                });
    }
}