using System.Windows;
using System.Windows.Threading;
using Notification.Core;
using Notification.Wpf;
using Notification.Wpf.Constants;
using ytLive.Helpers;

namespace ytLive.Services;

/// <summary>
/// Toast notifications rendered inside the main window's <c>ToastArea</c>
/// (bottom-right, above the footer). Info/success auto-dismiss after ~4s,
/// warnings ~8s, errors stay until dismissed. Calls from any thread are
/// marshalled to the captured dispatcher.
/// </summary>
public sealed class NotificationService : INotificationService
{
    public const string AreaName = "ToastArea";

    internal static readonly IReadOnlyDictionary<AppNotificationSeverity, (string BackgroundHex, double ExpirationSeconds)> Cards
        = new Dictionary<AppNotificationSeverity, (string, double)>
        {
            [AppNotificationSeverity.Info] = ("#3a3b52", 4),
            [AppNotificationSeverity.Success] = ("#1d5c38", 4),
            [AppNotificationSeverity.Warning] = ("#b8860b", 8),
            [AppNotificationSeverity.Error] = ("#8f1f1f", 0),
        };

    private readonly NotificationManager _manager = new();
    private readonly Dispatcher _dispatcher;

    public NotificationService()
        : this(Application.Current?.Dispatcher)
    {
    }

    internal NotificationService(Dispatcher? dispatcher)
    {
        _dispatcher = dispatcher ?? Dispatcher.CurrentDispatcher;
        NotificationConstants.NotificationCornerRadius = new CornerRadius(8);
        NotificationConstants.KeepNotificationVisibleOnMouseOver = true;
    }

    public void Show(string title, string message, AppNotificationSeverity severity)
    {
        var request = BuildRequest(title, message, severity);
        _dispatcher.Invoke(() => _manager.Show(request));
    }

    internal static NotificationRequest BuildRequest(string title, string message, AppNotificationSeverity severity)
    {
        var (backgroundHex, expirationSeconds) = Cards[severity];
        var builder = NotificationBuilder
            .Create(title, message)
            .InArea(AreaName)
            .WithBackground(NotificationColor.FromHex(backgroundHex))
            .WithForeground(NotificationColor.FromHex("#FFFFFF"));

        if (severity == AppNotificationSeverity.Error)
            builder.NeverExpires();
        else
            builder.ExpiresInSeconds(expirationSeconds);

        return builder.Build();
    }
}