using Avalonia.Controls;
using System;
using System.Data;
using Avalonia.Interactivity;

using System.IO;
using System.Collections.Generic;
using System.Linq;
namespace AvaloniaApplication3
{
    // Структура для хранения возраста 
    struct Age
    {
        public int Years;
        public int Months;
        public int Days;
        public DayOfWeek BirthDayOfWeek;
        public int BirthdaysOnSameWeekday;
        public List<int> LeapYears;
    }

    public partial class MainWindow : Window
    {
        private DatePicker dp;
        private TextBlock zodiacTextBlock;
        private TextBlock chineseZodiacTextBlock;

        public MainWindow()
        {
            InitializeComponent();

            dp = this.FindControl<DatePicker>("DatePicker");
            var button = this.FindControl<Button>("Button");
            var zodiacButton = this.FindControl<Button>("ZodiacButton");
            var chineseZodiacButton = this.FindControl<Button>("ChineseZodiacButton");
            zodiacTextBlock = this.FindControl<TextBlock>("ZodiacTextBlock");
            chineseZodiacTextBlock = this.FindControl<TextBlock>("ChineseZodiacTextBlock");

            button.Click += Button_Click;
            zodiacButton.Click += ZodiacButton_Click;
            chineseZodiacButton.Click += KinaiZodiacButton_Click;
        }

        private void Button_Click(object source, RoutedEventArgs args)
        {
            // получаем дату рождения 
            var birthDate = dp.SelectedDate;
            if (birthDate == null)
            {
                var errorTextBlock = this.FindControl<TextBlock>("ErrorTextBlock");
                errorTextBlock.Text = "Вы ввели несуществующую дату";
                return;
            }

            // вычисление возраста  
            var birthDateTime = birthDate.Value.DateTime;
            var age = CalculateAge(birthDateTime);
            var resultTextBlock = this.FindControl<TextBlock>("ResultTextBlock");
            resultTextBlock.Text = $"Вам {age.Years} лет, {age.Months} месяцев, {age.Days} дней. \n" +
                                 $"Вы родились в {GetRussianDayOfWeek(age.BirthDayOfWeek)}. \n" + // Изменение: вывод дня недели на русском
                                 $"Количество дней рождения, которые вы отпраздновали в этот же день недели: {age.BirthdaysOnSameWeekday}. \n" +
                                 $"Високосные годы: {string.Join(", ", age.LeapYears)}.";
        }

        private void ZodiacButton_Click(object sender, RoutedEventArgs e)
        {
            var birthDate = dp.SelectedDate;
            if (birthDate == null)
            {
                var errorTextBlock = this.FindControl<TextBlock>("ErrorTextBlock");
                errorTextBlock.Text = "Вы ввели несуществующую дату";
                return;
            }

            // знак зодиака 
            var birthDateTime = birthDate.Value.DateTime;
            int year = birthDateTime.Year;
            int month = birthDateTime.Month;
            int day = birthDateTime.Day;
            string Zod = GetZodiacSign(month, day);

            zodiacTextBlock.Text = $"Знак зодиака: {Zod}";
            zodiacTextBlock.IsVisible = true;
            chineseZodiacTextBlock.Text = "";
            chineseZodiacTextBlock.IsVisible = false;
        }

        private void KinaiZodiacButton_Click(object sender, RoutedEventArgs e)
        {
            var birthDate = dp.SelectedDate;
            if (birthDate == null)
            {
                var errorTextBlock = this.FindControl<TextBlock>("ErrorTextBlock");
                errorTextBlock.Text = "Вы ввели несуществующую дату";
                return;
            }

            // знак восточного календаря 
            var birthDateTime = birthDate.Value.DateTime;
            int year = birthDateTime.Year;
            string[] ZnakV = { "Крыса", "Бык", "Тигр", "Кролик", "Дракон", "Змея", "Лошадь", "Коза", "Обезьяна", "Петух", "Собака", "Свинья" };
            int index = (year - 4) % 12;

            chineseZodiacTextBlock.Text = $"Знак восточного календаря: {ZnakV[index]}";
            chineseZodiacTextBlock.IsVisible = true;
            zodiacTextBlock.Text = "";
            zodiacTextBlock.IsVisible = false;
        }

        private Age CalculateAge(DateTime birthDate)
        {
            var today = DateTime.Now;
            var years = today.Year - birthDate.Year;
            var months = today.Month - birthDate.Month;
            var days = today.Day - birthDate.Day;
            var birthDayOfWeek = birthDate.DayOfWeek;

            if (months < 0 || (months == 0 && days < 0))
            {
                years--;
                months += 12;
            }
            if (days < 0)
            {
                months--;
                days += DateTime.DaysInMonth(today.Year, today.Month);
            }

            // количество дней рождения в этот же день недели 
            int birthdaysOnSameWeekday = 0;
            var currentYear = birthDate.Year;
            while (currentYear < today.Year)
            {
                var potentialBirthday = new DateTime(currentYear, birthDate.Month, birthDate.Day);
                if (potentialBirthday.DayOfWeek == birthDayOfWeek)
                {
                    birthdaysOnSameWeekday++;
                }
                currentYear++;
            }

            // високосные годы 
            var leapYears = Enumerable.Range(birthDate.Year + 1, today.Year - birthDate.Year - 1)
                                       .Where(year => DateTime.IsLeapYear(year))
                                       .ToList();

            return new Age { Years = years, Months = months, Days = days, BirthDayOfWeek = birthDayOfWeek, BirthdaysOnSameWeekday = birthdaysOnSameWeekday, LeapYears = leapYears };
        }

        private string GetZodiacSign(int month, int day)
        {
            switch (month)
            {
                case 3:
                    return day >= 21 ? "Овен" : "Рыбы";
                case 4:
                    return day >= 20 ? "Телец" : "Овен";
                case 5:
                    return day >= 21 ? "Близнецы" : "Телец";
                case 6:
                    return day >= 21 ? "Рак" : "Близнецы";
                case 7:
                    return day >= 23 ? "Лев" : "Рак";
                case 8:
                    return day >= 23 ? "Дева" : "Лев";
                case 9:
                    return day >= 23 ? "Весы" : "Дева";
                case 10:
                    return day >= 23 ? "Скорпион" : "Весы";
                case 11:
                    return day >= 22 ? "Стрелец" : "Скорпион";
                case 12:
                    return day >= 22 ? "Козерог" : "Стрелец";
                case 1:
                    return day >= 20 ? "Водолей" : "Козерог";
                case 2:
                    return day >= 19 ? "Рыбы" : "Водолей";
                default:
                    return "Неизвестный знак";
            }
        }

        private string GetRussianDayOfWeek(DayOfWeek dayOfWeek)
        {
            switch (dayOfWeek)
            {
                case DayOfWeek.Monday: return "Понедельник";
                case DayOfWeek.Tuesday: return "Вторник";
                case DayOfWeek.Wednesday: return "Среда";
                case DayOfWeek.Thursday: return "Четверг";
                case DayOfWeek.Friday: return "Пятница";
                case DayOfWeek.Saturday: return "Суббота";
                case DayOfWeek.Sunday: return "Воскресенье";
                default: return "Неизвестный день";
            }
        }
    }
}