using System.Windows.Media;
using DesktopBot.Services;

namespace DesktopBot.ViewModels
{
    /// <summary>
    /// ViewModel per l'indicatore di ping verso Alpaca.
    /// Esposto in MainViewModel e mostrato nella sidebar.
    /// </summary>
    public class PingViewModel : BaseViewModel
    {
        private int    _latencyMs  = -1;
        private bool   _isOnline;
        private string _statusText = "---";
        private Brush  _statusColor;

        private static readonly Brush BrushGood    = new SolidColorBrush(Color.FromRgb(0x00, 0xC8, 0x5A)); // verde
        private static readonly Brush BrushFair    = new SolidColorBrush(Color.FromRgb(0xFF, 0xBF, 0x00)); // giallo
        private static readonly Brush BrushPoor    = new SolidColorBrush(Color.FromRgb(0xFF, 0x60, 0x00)); // arancione
        private static readonly Brush BrushOffline = new SolidColorBrush(Color.FromRgb(0xFF, 0x33, 0x33)); // rosso
        private static readonly Brush BrushIdle    = new SolidColorBrush(Color.FromRgb(0x66, 0x66, 0x80)); // grigio

        public int LatencyMs
        {
            get => _latencyMs;
            private set => SetProperty(ref _latencyMs, value);
        }

        public bool IsOnline
        {
            get => _isOnline;
            private set => SetProperty(ref _isOnline, value);
        }

        public string StatusText
        {
            get => _statusText;
            private set => SetProperty(ref _statusText, value);
        }

        public Brush StatusColor
        {
            get => _statusColor ??= BrushIdle;
            private set => SetProperty(ref _statusColor, value);
        }

        public void Update(PingResult result)
        {
            var dispatcher = System.Windows.Application.Current?.Dispatcher;
            if (dispatcher != null && !dispatcher.CheckAccess())
            {
                dispatcher.Invoke(() => Apply(result));
                return;
            }
            Apply(result);
        }

        private void Apply(PingResult result)
        {
            LatencyMs  = result.LatencyMs;
            IsOnline   = result.IsSuccess;

            switch (result.Status)
            {
                case PingStatus.Good:
                    StatusText  = $"{result.LatencyMs} ms";
                    StatusColor = BrushGood;
                    break;
                case PingStatus.Fair:
                    StatusText  = $"{result.LatencyMs} ms";
                    StatusColor = BrushFair;
                    break;
                case PingStatus.Poor:
                    StatusText  = $"{result.LatencyMs} ms";
                    StatusColor = BrushPoor;
                    break;
                default:
                    StatusText  = "OFFLINE";
                    StatusColor = BrushOffline;
                    break;
            }
        }
    }
}