using System.Windows.Data;
using Microsoft.Web.WebView2.Core;

namespace VideoDownloader.App.Browser.Features;

/// <summary>CoreWebView2DownloadOperation → IDownloadOperation 어댑터.</summary>
public sealed class DownloadOperationAdapter : IDownloadOperation
{
    private readonly CoreWebView2DownloadOperation _op;
    public DownloadOperationAdapter(CoreWebView2DownloadOperation op) => _op = op;

    public string Uri => _op.Uri ?? "";
    public string FileName => Path.GetFileName(_op.ResultFilePath ?? "");
    public long BytesReceived => (long)_op.BytesReceived;
    public long TotalBytesToReceive => (long)(_op.TotalBytesToReceive ?? 0);
    public string State => _op.State.ToString();

    public void Pause() => _op.Pause();
    public void Resume() => _op.Resume();
    public void Cancel() => _op.Cancel();

    public event Action? Changed
    {
        add { _op.BytesReceivedChanged += (_, _) => value?.Invoke(); _op.StateChanged += (_, _) => value?.Invoke(); }
        remove { }
    }
}

/// <summary>탭 검색 결과의 IsClosed → "닫힘" 라벨 변환.</summary>
public sealed class BoolToClosedConverter : IValueConverter
{
    public static readonly BoolToClosedConverter Instance = new();

    public object Convert(object? value, Type targetType, object? parameter, System.Globalization.CultureInfo culture)
        => value is true ? "닫힘 · 클릭해서 복원" : "";

    public object ConvertBack(object? value, Type targetType, object? parameter, System.Globalization.CultureInfo culture)
        => throw new NotSupportedException();
}


/// <summary>그룹 색상 HEX → Color / 표시 여부 변환 (탭 그룹 바).</summary>
public sealed class StringToBrushConverter : System.Windows.Data.IValueConverter
{
    public static readonly StringToBrushConverter Conv = new();
    public static readonly StringToBrushConverter VisibleIf = new();

    public object Convert(object? value, Type targetType, object? parameter, System.Globalization.CultureInfo culture)
    {
        var hex = value as string;
        if (ReferenceEquals(this, VisibleIf))
            return string.IsNullOrWhiteSpace(hex) ? System.Windows.Visibility.Collapsed : System.Windows.Visibility.Visible;
        try
        {
            var c = System.Windows.Media.ColorConverter.ConvertFromString(hex ?? "#5b8def");
            return c is System.Windows.Media.Color col ? col : System.Windows.Media.Colors.Gray;
        }
        catch { return System.Windows.Media.Colors.Gray; }
    }

    public object ConvertBack(object? value, Type targetType, object? parameter, System.Globalization.CultureInfo culture)
        => throw new NotSupportedException();
}