using System;
using System.Linq;
using System.Windows;

namespace Bedtimer
{
    public partial class MainWindow : Window
    {
        private Config _cfg = null!;

        public MainWindow()
        {
            InitializeComponent();
            _cfg = Config.LoadOrCreate();

            BedHour.ItemsSource = Enumerable.Range(1, 12);
            BedMinute.ItemsSource = new[] { "00", "05", "10", "15", "20", "25", "30", "35", "40", "45", "50", "55" };
            AmPm.ItemsSource = new[] { "AM", "PM" };

            // load values
            var (h, m, am) = ToClock(_cfg.BedMinutes);
            BedHour.SelectedItem = h;
            BedMinute.SelectedItem = m.ToString("00");
            AmPm.SelectedItem = am ? "AM" : "PM";
            WarnLead.Text = _cfg.WarnLead.ToString();
            FlashLead.Text = _cfg.FlashLead.ToString();
            LockDelay.Text = _cfg.LockDelay.ToString();
        }

        private static (int hour, int minute, bool am) ToClock(int minutes)
        {
            int hh24 = minutes / 60;
            int mm = minutes % 60;
            bool am = hh24 < 12;
            int hh12 = hh24 % 12; if (hh12 == 0) hh12 = 12;
            return (hh12, mm, am);
        }

        private static int ToMinutes(int hour12, int minute, bool am)
        {
            int hh24 = (hour12 % 12) + (am ? 0 : 12);
            return hh24 * 60 + minute;
        }

        private void Save_Click(object sender, RoutedEventArgs e)
        {
            int hour = (int)(BedHour.SelectedItem ?? 10);
            int minute = int.Parse((string?)BedMinute.SelectedItem ?? "30");
            bool am = ((string?)AmPm.SelectedItem ?? "PM") == "AM";

            _cfg.BedMinutes = ToMinutes(hour, minute, am);
            _cfg.WarnLead = int.TryParse(WarnLead.Text, out var w) ? Math.Max(1, w) : 60;
            _cfg.FlashLead = int.TryParse(FlashLead.Text, out var f) ? Math.Max(1, f) : 20;
            _cfg.LockDelay = int.TryParse(LockDelay.Text, out var d) ? Math.Max(0, d) : 5;

            _cfg.Save(); // non-admin -> triggers UAC; admin -> writes directly
            _cfg = Config.LoadOrCreate();
            MessageBox.Show(this, "Saved.", "Bedtimer", MessageBoxButton.OK, MessageBoxImage.Information);
        }


        private void Close_Click(object sender, RoutedEventArgs e) => Close();
    }
}