using System.Windows.Media;

namespace ytLive.Models;

/// <summary>
/// A scene's usage of the app-wide webcam — conceptually `webcam.{scene}.config`.
/// The identity lives once on the <see cref="Webcam"/> entity; this object is that
/// scene's placement, clip/mirror, border, and visibility for it. Exists only in
/// scenes where the creator added the webcam.
/// </summary>
public class WebcamSceneConfig : SceneElement
{
    public string WebcamId { get; init; } = string.Empty;
    public override bool IsWebcam => true;
    public override bool IsDraggable => true;
    public override ElementKind Kind => ElementKind.Dynamic;
    public override ImageSource? DisplaySource => VideoImageSource;

    private BackgroundEffect _backgroundEffect = BackgroundEffect.None;
    /// <summary>TASK 51: this scene's background effect for the webcam (persisted).</summary>
    public BackgroundEffect BackgroundEffect
    {
        get => _backgroundEffect;
        set
        {
            if (!Set(ref _backgroundEffect, value)) return;
            Raise(nameof(RemoveBackground));
            Raise(nameof(BlurBackground));
            Raise(nameof(HasBackgroundEffect));
        }
    }

    /// <summary>True while Remove or Blur is on — shows the strength slider.</summary>
    public bool HasBackgroundEffect => BackgroundEffect != BackgroundEffect.None;

    private double _backgroundStrength = 0.5;
    /// <summary>TASK 51: 0..1 — Blur amount, or Remove's edge softness (persisted).</summary>
    public double BackgroundStrength
    {
        get => _backgroundStrength;
        set => Set(ref _backgroundStrength, Math.Clamp(value, 0, 1));
    }

    /// <summary>Pill-switch surface: Remove and Blur behave like radio buttons — turning one
    /// on turns the other off; turning the active one off means <see cref="BackgroundEffect.None"/>.</summary>
    public bool RemoveBackground
    {
        get => BackgroundEffect == BackgroundEffect.Remove;
        set => BackgroundEffect = value ? BackgroundEffect.Remove
            : BackgroundEffect == BackgroundEffect.Remove ? BackgroundEffect.None : BackgroundEffect;
    }

    /// <inheritdoc cref="RemoveBackground"/>
    public bool BlurBackground
    {
        get => BackgroundEffect == BackgroundEffect.Blur;
        set => BackgroundEffect = value ? BackgroundEffect.Blur
            : BackgroundEffect == BackgroundEffect.Blur ? BackgroundEffect.None : BackgroundEffect;
    }
}