using System.Globalization;
using System.Windows;
using System.Windows.Data;
using System.Windows.Media;

namespace AxCopilot.Themes;

public class BoolToVisibilityConverter : IValueConverter
{
    public object Convert(object value, Type t, object p, CultureInfo c) =>
        value is true ? Visibility.Visible : Visibility.Collapsed;
    public object ConvertBack(object v, Type t, object p, CultureInfo c) =>
        v is Visibility.Visible;
}

public class InverseBoolToVisibilityConverter : IValueConverter
{
    public object Convert(object value, Type t, object p, CultureInfo c) =>
        value is true ? Visibility.Collapsed : Visibility.Visible;
    public object ConvertBack(object v, Type t, object p, CultureInfo c) =>
        v is not Visibility.Visible;
}

public class CountToVisibilityConverter : IValueConverter
{
    public object Convert(object value, Type t, object p, CultureInfo c) =>
        value is int count && count > 0 ? Visibility.Visible : Visibility.Collapsed;
    public object ConvertBack(object v, Type t, object p, CultureInfo c) =>
        throw new NotImplementedException();
}

/// <summary>
/// Segoe MDL2 심볼 코드포인트 → 아이콘 배경 SolidColorBrush.
/// 핸들러 타입별로 서로 다른 색상을 반환합니다.
/// </summary>
public class SymbolToBackgroundConverter : IValueConverter
{
    private static readonly Dictionary<string, SolidColorBrush> SymbolColors = new()
    {
        { Symbols.Globe,     Brush("#0078D4") },  // URL      — Microsoft Blue
        { Symbols.Folder,    Brush("#107C10") },  // 폴더     — Green
        { Symbols.Terminal,  Brush("#1B1B1B") },  // 터미널   — Near Black
        { Symbols.Clipboard, Brush("#8764B8") },  // 클립보드 — Purple
        { Symbols.Workspace, Brush("#C50F1F") },  // 워크스페이스 — Red
        { Symbols.Cloud,     Brush("#0099BC") },  // API      — Teal
        { Symbols.Plugin,    Brush("#C239B3") },  // 플러그인 — Magenta
        { Symbols.App,       Brush("#4B5EFC") },  // 앱       — Accent
        { Symbols.File,      Brush("#605E5C") },  // 파일     — Gray
        { Symbols.Save,      Brush("#107C10") },  // 저장     — Green
        { Symbols.Delete,    Brush("#C50F1F") },  // 삭제     — Red
        { Symbols.Rename,    Brush("#CA5010") },  // 이름변경 — Orange
        { Symbols.Restore,   Brush("#0078D4") },  // 복원     — Blue
        { Symbols.Info,      Brush("#4B5EFC") },  // 정보     — Accent
        { Symbols.Warning,   Brush("#CA5010") },  // 경고     — Orange
        { Symbols.Error,     Brush("#C50F1F") },  // 오류     — Red
    };

    private static readonly SolidColorBrush DefaultBrush = Brush("#4B5EFC");

    public object Convert(object value, Type t, object p, CultureInfo c) =>
        value is string symbol && SymbolColors.TryGetValue(symbol, out var brush)
            ? brush : DefaultBrush;

    public object ConvertBack(object v, Type t, object p, CultureInfo c) =>
        throw new NotImplementedException();

    private static SolidColorBrush Brush(string hex)
    {
        var color = (Color)ColorConverter.ConvertFromString(hex);
        var brush = new SolidColorBrush(color);
        brush.Freeze();
        return brush;
    }
}

/// <summary>
/// 바인딩 값과 파라미터 문자열이 일치하는지 여부를 bool로 반환합니다.
/// RadioButton IsChecked 바인딩에 사용합니다.
/// </summary>
public class StringEqualConverter : IValueConverter
{
    public object Convert(object value, Type t, object p, CultureInfo c) =>
        value is string s && p is string param && s == param;
    public object ConvertBack(object v, Type t, object p, CultureInfo c) =>
        v is true ? p : System.Windows.Data.Binding.DoNothing;
}

/// <summary>
/// "#RRGGBB" 헥스 문자열 → WPF Color 변환기 (테마 카드 미리보기용).
/// XAML에서 {x:Static converters:HexToColorConverter.Instance} 로 사용합니다.
/// </summary>
public class HexToColorConverter : IValueConverter
{
    public static readonly HexToColorConverter Instance = new();

    public object Convert(object value, Type t, object p, CultureInfo c)
    {
        if (value is string hex)
        {
            try { return (Color)ColorConverter.ConvertFromString(hex); }
            catch (Exception) { /* 잘못된 값이면 기본 반환 */ }
        }
        return Colors.Transparent;
    }

    public object ConvertBack(object v, Type t, object p, CultureInfo c) =>
        throw new NotImplementedException();
}

/// <summary>null 또는 빈 문자열이면 Collapsed, 값이 있으면 Visible.</summary>
public class NullToCollapsedConverter : IValueConverter
{
    public object Convert(object value, Type t, object p, CultureInfo c) =>
        value is string s && !string.IsNullOrEmpty(s) ? Visibility.Visible : Visibility.Collapsed;
    public object ConvertBack(object v, Type t, object p, CultureInfo c) =>
        throw new NotImplementedException();
}

/// <summary>LauncherItem.Data가 ClipboardEntry(이미지)면 썸네일 BitmapSource 반환.</summary>
public class ClipboardThumbnailConverter : IValueConverter
{
    public object? Convert(object value, Type t, object p, CultureInfo c)
    {
        if (value is Services.ClipboardEntry { Image: not null } entry)
            return entry.Image;
        return null;
    }
    public object ConvertBack(object v, Type t, object p, CultureInfo c) =>
        throw new NotImplementedException();
}

/// <summary>ClipboardEntry 이미지가 있으면 Visible.</summary>
public class ClipboardHasImageConverter : IValueConverter
{
    public object Convert(object value, Type t, object p, CultureInfo c) =>
        value is Services.ClipboardEntry { Image: not null } ? Visibility.Visible : Visibility.Collapsed;
    public object ConvertBack(object v, Type t, object p, CultureInfo c) =>
        throw new NotImplementedException();
}

/// <summary>Subtitle에 경고 기호(⚠)가 포함되면 Visible, 아니면 Collapsed 반환.</summary>
public class WarningSubtitleColorConverter : IValueConverter
{
    public object Convert(object value, Type t, object p, CultureInfo c) =>
        value is string s && s.Contains('\u26A0') ? Visibility.Visible : Visibility.Collapsed;
    public object ConvertBack(object v, Type t, object p, CultureInfo c) =>
        throw new NotImplementedException();
}

/// <summary>ListViewItem → 1-based 인덱스 문자열. 9 초과 시 빈 문자열.</summary>
public class IndexToNumberConverter : IValueConverter
{
    public object Convert(object value, Type t, object p, CultureInfo c)
    {
        if (value is System.Windows.Controls.ListViewItem item)
        {
            var lv = System.Windows.Controls.ItemsControl.ItemsControlFromItemContainer(item);
            if (lv != null)
            {
                var idx = lv.ItemContainerGenerator.IndexFromContainer(item);
                return idx >= 0 && idx < 9 ? (idx + 1).ToString() : "";
            }
        }
        return "";
    }
    public object ConvertBack(object v, Type t, object p, CultureInfo c) =>
        throw new NotImplementedException();
}