using System.Windows.Media;
using ytLive.Helpers;

namespace ytLive.Models;

public enum SourceType
{
    DisplayCapture,
    WindowCapture,
    Background,
    Image,
    TextOverlay,
    Countdown,
    WebSource,
    ChatBox
}

public enum ClipShape
{
    Traditional,
    Round
}

/// <summary>
/// A multi-instance scene object: image/background/text (screen/window later).
/// The webcam is NOT a Source — it's a singleton resource whose per-scene usage
/// is a <see cref="WebcamSceneConfig"/>. See the singleton-vs-multi-instance
/// discriminator in ai.md.
/// </summary>
public class Source : SceneElement
{
    private SourceType _type;
    public SourceType Type
    {
        get => _type;
        set
        {
            if (Set(ref _type, value))
            {
                Raise(nameof(IsLiveCapture));
                Raise(nameof(DisplaySource));
                Raise(nameof(IsWebSource));
            }
        }
    }

    public override bool IsDraggable => Type is SourceType.Image or SourceType.WebSource or SourceType.ChatBox;

    public override bool IsWebSource => Type == SourceType.WebSource;

    /// <summary>The permanent scene backdrop (live desktop/game capture). Never removable/reorderable.</summary>
    private bool _isBackdrop;
    public bool IsBackdrop { get => _isBackdrop; set => Set(ref _isBackdrop, value); }

    private bool _showDesktop;
    public bool ShowDesktop { get => _showDesktop; set => Set(ref _showDesktop, value); }

    private bool _isEnabled = true;
    public bool IsEnabled { get => _isEnabled; set => Set(ref _isEnabled, value); }

    // Display/Window capture
    private int? _monitorIndex;
    public int? MonitorIndex { get => _monitorIndex; set => Set(ref _monitorIndex, value); }

    private IntPtr? _windowHandle;
    public IntPtr? WindowHandle { get => _windowHandle; set => Set(ref _windowHandle, value); }

    /// <summary>
    /// Identifies what this live-capture source points at: "monitor:&lt;index&gt;" or
    /// "window:&lt;hwnd&gt;". Persisted so a re-designated backdrop survives a reload.
    /// </summary>
    private string? _captureKey;
    public string? CaptureKey { get => _captureKey; set => Set(ref _captureKey, value); }

    public bool IsLiveCapture => Type is SourceType.DisplayCapture or SourceType.WindowCapture;

    // Image (asset stored in the layout database)
    private string? _assetId;
    private ImageSource? _imageSource;

    public string? AssetId
    {
        get => _assetId;
        set
        {
            if (Set(ref _assetId, value))
            {
                _imageSource = ImageCache.Get(value ?? string.Empty);
                Raise(nameof(ImageSource));
                Raise(nameof(DisplaySource));
            }
        }
    }

    public ImageSource? ImageSource => _imageSource;

    public override ImageSource? DisplaySource => IsLiveCapture
        ? (VideoImageSource ?? _imageSource)
        : (Type == SourceType.ChatBox ? VideoImageSource : _imageSource);

    public override bool IsImageSource => Type == SourceType.Image;

    // Countdown config
    private int _timerMinutes = 15;
    public int TimerMinutes
    {
        get => _timerMinutes;
        set => Set(ref _timerMinutes, Math.Clamp(value, 1, 60));
    }

    // Web source config
    private string? _webUri;
    public string? WebUri { get => _webUri; set => Set(ref _webUri, value); }

    // Chat box config (TASK 3.18)
    private double _chatFontSize = 16;
    public double ChatFontSize
    {
        get => _chatFontSize;
        set => Set(ref _chatFontSize, Math.Clamp(value, 8, 72));
    }

    private string _chatFontColor = "#FFFFFF";
    public string ChatFontColor { get => _chatFontColor; set => Set(ref _chatFontColor, value); }

    private string _chatBackgroundColor = "#80000000";
    public string ChatBackgroundColor
    {
        get => _chatBackgroundColor;
        set
        {
            if (Set(ref _chatBackgroundColor, value))
                Raise(nameof(ChatBackgroundOpacity));
        }
    }

    /// <summary>Alpha channel of ChatBackgroundColor as 0.0–1.0. Slider writes back the full hex string.</summary>
    public double ChatBackgroundOpacity
    {
        get
        {
            var hex = _chatBackgroundColor.Trim().TrimStart('#');
            return hex.Length == 8
                ? byte.Parse(hex.AsSpan(0, 2), System.Globalization.NumberStyles.HexNumber) / 255.0
                : 1.0;
        }
        set
        {
            var alpha = (byte)Math.Clamp(value * 255, 0, 255);
            var hex = _chatBackgroundColor.Trim().TrimStart('#');
            if (hex.Length == 8) hex = hex[2..];
            if (hex.Length == 6) ChatBackgroundColor = $"#{alpha:X2}{hex}";
        }
    }

    private int _chatMaxMessages = 5;
    public int ChatMaxMessages
    {
        get => _chatMaxMessages;
        set => Set(ref _chatMaxMessages, Math.Clamp(value, 1, 20));
    }

    private bool _chatShowTimestamps = true;
    public bool ChatShowTimestamps { get => _chatShowTimestamps; set => Set(ref _chatShowTimestamps, value); }

    private bool _chatShowBadges = true;
    public bool ChatShowBadges { get => _chatShowBadges; set => Set(ref _chatShowBadges, value); }

    private string _chatMemberColor = "#e94560";
    public string ChatMemberColor { get => _chatMemberColor; set => Set(ref _chatMemberColor, value); }

    private string _chatSuperChatColor = "#eab308";
    public string ChatSuperChatColor { get => _chatSuperChatColor; set => Set(ref _chatSuperChatColor, value); }

    private string _chatFontFamily = "Segoe UI";
    public string ChatFontFamily { get => _chatFontFamily; set => Set(ref _chatFontFamily, value); }

    private int _chatFadeSeconds;
    public int ChatFadeSeconds
    {
        get => _chatFadeSeconds;
        set => Set(ref _chatFadeSeconds, Math.Clamp(value, 0, 60));
    }

    public override bool IsChatBox => Type == SourceType.ChatBox;

    private bool _chatPreviewEnabled = true;
    public bool ChatPreviewEnabled
    {
        get => _chatPreviewEnabled;
        set => Set(ref _chatPreviewEnabled, value);
    }
}