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

namespace StructConsole
{
    class Program
    {
        public struct Date
        {
            public int Year;
            public int Month;
            public int Day;
            public int Hours;
            public int Minutes;
            public Date(int day, int month, int year, int hours, int minutes)
            {
                Day = day;
                Month = month;
                Year = year;
                Hours = hours;
                Minutes = minutes;
            }
        }

        public struct Airplane
        {
            public string StartCity;
            public Date StartDate;
            public string FinishCity;
            public Date FinishDate;
            public Airplane(string startCity, Date startDate, string finishCity, Date finishDate)
            {
                StartCity = startCity;
                StartDate = startDate;
                FinishCity = finishCity;
                FinishDate = finishDate;
            }

            public double GetTotalTime()
            {
                DateTime departDate = new DateTime(StartDate.Year, StartDate.Month, StartDate.Day, StartDate.Hours, StartDate.Minutes, 0);
                DateTime arrivalDate = new DateTime(FinishDate.Year, FinishDate.Month, FinishDate.Day, FinishDate.Hours, FinishDate.Minutes, 0);
                return (arrivalDate - departDate).TotalMinutes;
            }

            public bool IsArrivingToday()
            {
                if (StartDate.Day == FinishDate.Day)
                    return true;
                else
                    return false;
            }
        }

        public static Date ReadDate()
        {
            Date air;
            bool flag = true;
            do
            {
                Console.ForegroundColor = ConsoleColor.Green;
                Console.Write("Enter day: ");
                if (!int.TryParse(Console.ReadLine(), out air.Day) || air.Day < 0 || air.Day > 2025)
                {
                    flag = false;
                    Console.ForegroundColor = ConsoleColor.DarkRed;
                    Console.WriteLine("Error404. Try to enter again!");
                }
                else
                    flag = true;
            } while (!flag);

            do
            {
                Console.ForegroundColor = ConsoleColor.Green;
                Console.Write("Enter month: ");
                if (!int.TryParse(Console.ReadLine(), out air.Month) || air.Month < 0 || air.Month > 12)
                {
                    flag = false;
                    Console.ForegroundColor = ConsoleColor.DarkRed;
                    Console.WriteLine("Error404. Try to enter again!");
                }
                else
                    flag = true;
            } while (!flag);

            do
            {
                Console.ForegroundColor = ConsoleColor.Green;
                Console.Write("Enter year: ");
                if (!int.TryParse(Console.ReadLine(), out air.Year) || air.Year < 2018 || air.Year > 2025)
                {
                    flag = false;
                    Console.ForegroundColor = ConsoleColor.DarkRed;
                    Console.WriteLine("Error404. Try to enter again!");
                }
                else
                    flag = true;
            } while (!flag);

            do
            {
                Console.ForegroundColor = ConsoleColor.Green;
                Console.Write("Enter hours: ");
                if (!int.TryParse(Console.ReadLine(), out air.Hours) || air.Hours < 0 || air.Hours > 24)
                {
                    flag = false;
                    Console.ForegroundColor = ConsoleColor.DarkRed;
                    Console.WriteLine("Error404. Try to enter again!");
                }
                else
                    flag = true;
            } while (!flag);

            do
            {
                Console.ForegroundColor = ConsoleColor.Green;
                Console.Write("Enter minutes: ");
                if (!int.TryParse(Console.ReadLine(), out air.Minutes) || air.Minutes < 0 || air.Minutes > 60)
                {
                    flag = false;
                    Console.ForegroundColor = ConsoleColor.DarkRed;
                    Console.WriteLine("Error404. Try to enter again!");
                }
                else
                    flag = true;
            } while (!flag);

            return air;
        }

        public static Airplane[] ReadAllFlights()
        {
            Console.Clear();
            int len;
            bool flag = true;
            do
            {
                Console.ForegroundColor = ConsoleColor.Yellow;
                Console.Write("Enter amount of flights: ");
                if (!int.TryParse(Console.ReadLine(), out len))
                {
                    flag = false;
                    Console.ForegroundColor = ConsoleColor.DarkRed;
                    Console.WriteLine("Error404. Try to enter again!");
                }
                else
                    flag = true;
            } while (!flag);
            Console.Clear();
            Airplane[] flight = new Airplane[len];
            for (int i = 0; i < flight.Length; i++)
            {
                Console.Clear();
                Console.ForegroundColor = ConsoleColor.Red;
                Console.WriteLine("~ ~ ~ ~ ~ Flight #{0} ~ ~ ~ ~ ~", i);
                flight[i] = ReadAirplane();
            }
            return flight;
        }

        public static Airplane ReadAirplane()
        {
            Airplane flight;
            Console.ForegroundColor = ConsoleColor.DarkMagenta;
            Console.WriteLine("~ ~ ~ DEPART ~ ~ ~");
            Console.ForegroundColor = ConsoleColor.Green;
            Console.Write("Enter depart city: ");
            flight.StartCity = Console.ReadLine();
            Console.Clear();
            Console.ForegroundColor = ConsoleColor.Cyan;
            Console.WriteLine("- - - Enter depart date - - -");
            flight.StartDate = ReadDate();
            Console.ForegroundColor = ConsoleColor.Green;
            Console.Clear();
            Console.ForegroundColor = ConsoleColor.DarkGray;
            Console.WriteLine("~ ~ ~ ARRIVAL ~ ~ ~");
            Console.ForegroundColor = ConsoleColor.Cyan;
            Console.Write("Enter arrival city: ");
            flight.FinishCity = Console.ReadLine();
            Console.Clear();
            Console.WriteLine("- - - Enter arrival date - - -");
            flight.FinishDate = ReadDate();
            return flight;
        }

        public static void PrintDate(Date date)
        {
            Console.ForegroundColor = ConsoleColor.White;
            Console.WriteLine("Date: {0}.{1}.{2} - {3}:{4}", date.Day, date.Month, date.Year, date.Hours, date.Minutes);
        }

        public static void PrintAirplane(Airplane airplane)
        {
            Console.ForegroundColor = ConsoleColor.DarkCyan;
            Console.Write("Depart city: ");
            Console.WriteLine(airplane.StartCity);
            Console.WriteLine("Depart time: ");
            PrintDate(airplane.StartDate);
            Console.ForegroundColor = ConsoleColor.DarkRed;
            Console.Write("Arrival city: ");
            Console.WriteLine(airplane.FinishCity);
            Console.WriteLine("Arrival time: ");
            PrintDate(airplane.FinishDate);
        }

        public static void PrintAirplanes(Airplane[] airplanes)
        {
            Console.Clear();
            for (int i = 0; i < airplanes.Length; i++)
            {
                Console.ForegroundColor = ConsoleColor.Red;
                Console.WriteLine("~ ~ ~ ~ Flight #{0} ~ ~ ~ ~", i);
                PrintAirplane(airplanes[i]);
            }
            Console.ForegroundColor = ConsoleColor.White;
            Console.WriteLine("Press enter to continue...");
            Console.ReadKey();
        }

        public static void GetAirplaneInfo(Airplane[] airplanes, out double shortFlight, out double longFlight)
        {
            Console.Clear();
            longFlight = double.MinValue;
            shortFlight = double.MaxValue;
            for (int i = 0; i < airplanes.Length; i++)
            {
                if (airplanes[i].GetTotalTime() < shortFlight)
                    shortFlight = airplanes[i].GetTotalTime();
                if (airplanes[i].GetTotalTime() > longFlight)
                    longFlight = airplanes[i].GetTotalTime();
            }
            Console.ForegroundColor = ConsoleColor.Cyan;
            Console.WriteLine("The shortest duration of flight: {0}\nThe longest duration of flight: {1}", shortFlight, longFlight);
            Console.ForegroundColor = ConsoleColor.White;
            Console.WriteLine("Press enter to continue...");
            Console.ReadKey();
        }

        public static int SortAirplnesByTotalTime(Airplane a, Airplane b)
        {
            double avgA = a.GetTotalTime(), avgB = b.GetTotalTime();
            if (avgA > avgB)
                return 1;
            if (avgA < avgB)
                return -1;
            return 0;
        }

        public static int SortAirplnesByDate(Airplane a, Airplane b)
        {
            DateTime fstDateA = new DateTime(a.StartDate.Year, a.StartDate.Month, a.StartDate.Day, a.StartDate.Hours, a.StartDate.Minutes, 0);
            DateTime sndDateB = new DateTime(b.StartDate.Year, b.StartDate.Month, b.StartDate.Day, b.StartDate.Hours, b.StartDate.Minutes, 0);
            return DateTime.Compare(fstDateA, sndDateB);
        }

        static void Menu()
        {
            Console.Clear();
            Console.ForegroundColor = ConsoleColor.Red;
            Console.WriteLine("\t~ ~ ~ ~ MENU ~ ~ ~ ~");
            Console.ForegroundColor = ConsoleColor.Cyan;
            Console.WriteLine("1. Add flight;\n2. Show all flights;\n3. Show the longest and shortest flight;\n4. Sort by DATE ARRIVAL;\n5. Sort by DURATION of FLIGHT;\n");
            Console.ForegroundColor = ConsoleColor.DarkRed;
            Console.WriteLine("\tTo QUIT - Press 0");
        }


        static void Main(string[] args)
        {
            Console.Title = "Лабораторна робота №4";
            ConsoleKeyInfo hotKey;
            int elLen = 0;
            double shortFlight, longFlight;
            Airplane[] allAirplanes = new Airplane[0];
            do
            {
                Menu();
                hotKey = Console.ReadKey();
                switch (hotKey.Key)
                {
                    case ConsoleKey.D1:
                        allAirplanes = ReadAllFlights();
                        elLen = allAirplanes.Length;
                        break;
                    case ConsoleKey.D2:
                        PrintAirplanes(allAirplanes);
                        break;
                    case ConsoleKey.D3:
                        GetAirplaneInfo(allAirplanes, out shortFlight, out longFlight);
                        break;
                    case ConsoleKey.D4:
                        Array.Sort(allAirplanes, SortAirplnesByDate);
                        Array.Reverse(allAirplanes);
                        break;
                    case ConsoleKey.D5:
                        Array.Sort(allAirplanes, SortAirplnesByTotalTime);
                        break;
                    case ConsoleKey.D0:
                        Console.Clear();
                        Console.ForegroundColor = ConsoleColor.Green;
                        Console.WriteLine("See you later!");
                        Environment.Exit(0);
                        break;
                    default:
                        Console.WriteLine("\nPress another button!");
                        break;
                }
            } while (true);
        }
    }
}