using System.Text.RegularExpressions;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Shapes;

namespace AxCopilot.Views;

/// <summary>커스텀 디자인 무드 추가/편집 다이얼로그.</summary>
internal sealed partial class CustomMoodDialog : Window
{
    private readonly TextBox _keyBox;
    private readonly TextBox _labelBox;
    private readonly TextBox _iconBox;
    private readonly TextBox _descBox;
    private readonly TextBox _cssBox;
    private readonly bool _isEdit;

    public string MoodKey => _keyBox.Text.Trim().ToLowerInvariant();
    public string MoodLabel => _labelBox.Text.Trim();
    public string MoodIcon => _iconBox.Text.Trim();
    public string MoodDescription => _descBox.Text.Trim();
    public string MoodCss => _cssBox.Text;

    public CustomMoodDialog(
        string existingKey = "",
        string existingLabel = "",
        string existingIcon = "🎯",
        string existingDesc = "",
        string existingCss = "")
    {
        _isEdit = !string.IsNullOrEmpty(existingKey);
        Title = _isEdit ? "무드 편집" : "무드 추가";
        Width = 560;
        SizeToContent = SizeToContent.Height;
        WindowStartupLocation = WindowStartupLocation.CenterOwner;
        ResizeMode = ResizeMode.NoResize;
        WindowStyle = WindowStyle.None;
        AllowsTransparency = true;
        Background = Brushes.Transparent;

        var bgBrush = Application.Current.TryFindResource("LauncherBackground") as Brush
                      ?? new SolidColorBrush(Color.FromRgb(0x1A, 0x1B, 0x2E));
        var primaryText = Application.Current.TryFindResource("PrimaryText") as Brush ?? Brushes.White;
        var secondaryText = Application.Current.TryFindResource("SecondaryText") as Brush ?? Brushes.Gray;
        var accentBrush = Application.Current.TryFindResource("AccentColor") as Brush ?? Brushes.Blue;
        var itemBg = Application.Current.TryFindResource("ItemBackground") as Brush
                     ?? new SolidColorBrush(Color.FromRgb(0x2A, 0x2B, 0x40));
        var borderBrush = Application.Current.TryFindResource("BorderColor") as Brush ?? Brushes.Gray;

        var root = new Border
        {
            Background = bgBrush,
            CornerRadius = new CornerRadius(16),
            BorderBrush = borderBrush,
            BorderThickness = new Thickness(1),
            Padding = new Thickness(28, 24, 28, 24),
            Effect = new System.Windows.Media.Effects.DropShadowEffect
            {
                BlurRadius = 24, ShadowDepth = 4, Opacity = 0.3, Color = Colors.Black,
            },
        };

        var stack = new StackPanel();

        // 헤더
        var header = new StackPanel { Orientation = Orientation.Horizontal, Margin = new Thickness(0, 0, 0, 20) };
        header.Children.Add(new TextBlock
        {
            Text = "\uE771",
            FontFamily = new FontFamily("Segoe MDL2 Assets"),
            FontSize = 18, Foreground = accentBrush,
            VerticalAlignment = VerticalAlignment.Center,
            Margin = new Thickness(0, 0, 10, 0),
        });
        header.Children.Add(new TextBlock
        {
            Text = _isEdit ? "디자인 무드 편집" : "새 커스텀 디자인 무드",
            FontSize = 17, FontWeight = FontWeights.Bold,
            Foreground = primaryText, VerticalAlignment = VerticalAlignment.Center,
        });
        stack.Children.Add(header);

        // ── 키 + 라벨 + 아이콘 (한 줄) ──
        var row1 = new StackPanel { Orientation = Orientation.Horizontal, Margin = new Thickness(0, 0, 0, 8) };

        // 키
        var keyStack = new StackPanel { Margin = new Thickness(0, 0, 12, 0) };
        AddLabel(keyStack, "키 (영문)", primaryText);
        _keyBox = CreateTextBox(existingKey, primaryText, itemBg, accentBrush, borderBrush);
        _keyBox.Width = 140;
        _keyBox.IsEnabled = !_isEdit; // 편집 시 키 변경 불가
        keyStack.Children.Add(new Border { CornerRadius = new CornerRadius(8), ClipToBounds = true, Child = _keyBox });
        row1.Children.Add(keyStack);

        // 라벨
        var labelStack = new StackPanel { Margin = new Thickness(0, 0, 12, 0) };
        AddLabel(labelStack, "이름", primaryText);
        _labelBox = CreateTextBox(existingLabel, primaryText, itemBg, accentBrush, borderBrush);
        _labelBox.Width = 180;
        labelStack.Children.Add(new Border { CornerRadius = new CornerRadius(8), ClipToBounds = true, Child = _labelBox });
        row1.Children.Add(labelStack);

        // 아이콘 (이모지)
        var iconStack = new StackPanel();
        AddLabel(iconStack, "아이콘", primaryText);
        _iconBox = CreateTextBox(existingIcon, primaryText, itemBg, accentBrush, borderBrush);
        _iconBox.Width = 60;
        _iconBox.TextAlignment = TextAlignment.Center;
        iconStack.Children.Add(new Border { CornerRadius = new CornerRadius(8), ClipToBounds = true, Child = _iconBox });
        row1.Children.Add(iconStack);

        stack.Children.Add(row1);

        // ── 설명 ──
        AddLabel(stack, "설명", primaryText);
        _descBox = CreateTextBox(existingDesc, primaryText, itemBg, accentBrush, borderBrush);
        stack.Children.Add(new Border { CornerRadius = new CornerRadius(8), ClipToBounds = true, Child = _descBox, Margin = new Thickness(0, 0, 0, 8) });

        // ── CSS ──
        AddSeparator(stack, borderBrush);
        AddLabel(stack, "CSS 스타일", primaryText);
        AddHint(stack, "문서에 적용될 CSS입니다. body, h1~h6, table, .callout 등의 스타일을 정의하세요.", secondaryText);
        _cssBox = CreateTextBox(existingCss, primaryText, itemBg, accentBrush, borderBrush, multiline: true, height: 200);
        _cssBox.FontFamily = new FontFamily("Consolas, Courier New, monospace");
        _cssBox.FontSize = 12;
        stack.Children.Add(new Border { CornerRadius = new CornerRadius(8), ClipToBounds = true, Child = _cssBox });

        // CSS 힌트 버튼
        var hintBtn = new TextBlock
        {
            Text = "CSS 예시 보기",
            FontSize = 11,
            Foreground = accentBrush,
            Cursor = Cursors.Hand,
            Margin = new Thickness(0, 6, 0, 0),
            TextDecorations = TextDecorations.Underline,
        };
        hintBtn.MouseLeftButtonDown += (_, _) =>
        {
            if (string.IsNullOrWhiteSpace(_cssBox.Text))
            {
                _cssBox.Text = CssExample;
            }
        };
        stack.Children.Add(hintBtn);

        // ── 버튼 바 ──
        var btnBar = new StackPanel
        {
            Orientation = Orientation.Horizontal,
            HorizontalAlignment = HorizontalAlignment.Right,
            Margin = new Thickness(0, 20, 0, 0),
        };

        var cancelBtn = new Button
        {
            Content = "취소", Width = 80,
            Padding = new Thickness(0, 8, 0, 8),
            Margin = new Thickness(0, 0, 10, 0),
            Background = Brushes.Transparent, Foreground = secondaryText,
            BorderBrush = borderBrush, BorderThickness = new Thickness(1),
            Cursor = Cursors.Hand, FontSize = 13,
        };
        cancelBtn.Click += (_, _) => { DialogResult = false; Close(); };
        btnBar.Children.Add(cancelBtn);

        var okBtn = new Button
        {
            Content = _isEdit ? "저장" : "추가", Width = 80,
            Padding = new Thickness(0, 8, 0, 8),
            Background = accentBrush, Foreground = Brushes.White,
            BorderThickness = new Thickness(0),
            Cursor = Cursors.Hand, FontSize = 13, FontWeight = FontWeights.SemiBold,
        };
        okBtn.Click += (_, _) => Validate();
        btnBar.Children.Add(okBtn);
        stack.Children.Add(btnBar);

        root.Child = stack;
        Content = root;

        KeyDown += (_, ke) => { if (ke.Key == Key.Escape) { DialogResult = false; Close(); } };
        Loaded += (_, _) => { (_isEdit ? _labelBox : _keyBox).Focus(); };
        root.MouseLeftButtonDown += (_, me) =>
        {
            if (me.LeftButton == MouseButtonState.Pressed)
                try { DragMove(); } catch { }
        };
    }

    private void Validate()
    {
        if (string.IsNullOrWhiteSpace(_keyBox.Text))
        {
            CustomMessageBox.Show("키를 입력하세요 (영문 소문자).", "입력 오류", MessageBoxButton.OK, MessageBoxImage.Warning);
            _keyBox.Focus(); return;
        }
        if (!Regex.IsMatch(_keyBox.Text.Trim(), @"^[a-z][a-z0-9_]{1,20}$"))
        {
            CustomMessageBox.Show("키는 영문 소문자로 시작하며, 소문자/숫자/밑줄만 허용됩니다 (2~21자).", "입력 오류", MessageBoxButton.OK, MessageBoxImage.Warning);
            _keyBox.Focus(); return;
        }
        if (string.IsNullOrWhiteSpace(_labelBox.Text))
        {
            CustomMessageBox.Show("이름을 입력하세요.", "입력 오류", MessageBoxButton.OK, MessageBoxImage.Warning);
            _labelBox.Focus(); return;
        }
        // 내장 무드 키와 충돌 확인
        if (!_isEdit)
        {
            var builtinKeys = new[] { "modern", "professional", "creative", "minimal", "elegant", "dark", "colorful", "corporate", "magazine", "dashboard" };
            if (builtinKeys.Contains(_keyBox.Text.Trim().ToLowerInvariant()))
            {
                CustomMessageBox.Show("내장 무드와 동일한 키는 사용할 수 없습니다.", "입력 오류", MessageBoxButton.OK, MessageBoxImage.Warning);
                _keyBox.Focus(); return;
            }
        }
        DialogResult = true;
        Close();
    }

    private static void AddLabel(StackPanel parent, string text, Brush fg) =>
        parent.Children.Add(new TextBlock
        {
            Text = text, FontSize = 12, FontWeight = FontWeights.SemiBold,
            Foreground = fg, Margin = new Thickness(0, 0, 0, 6),
        });

    private static void AddHint(StackPanel parent, string text, Brush fg) =>
        parent.Children.Add(new TextBlock
        {
            Text = text, FontSize = 11, Foreground = fg,
            Margin = new Thickness(0, 0, 0, 8),
        });

    private static void AddSeparator(StackPanel parent, Brush color) =>
        parent.Children.Add(new Rectangle
        {
            Height = 1, Fill = color,
            Margin = new Thickness(0, 8, 0, 12), Opacity = 0.5,
        });

    private static TextBox CreateTextBox(string text, Brush fg, Brush bg, Brush caret, Brush border, bool multiline = false, int height = 100)
    {
        var tb = new TextBox
        {
            Text = text, FontSize = 13,
            Padding = new Thickness(12, 8, 12, 8),
            Foreground = fg, Background = bg,
            CaretBrush = caret, BorderBrush = border,
            BorderThickness = new Thickness(1),
        };
        if (multiline)
        {
            tb.AcceptsReturn = true;
            tb.AcceptsTab = true;
            tb.TextWrapping = TextWrapping.Wrap;
            tb.MinHeight = height;
            tb.MaxHeight = height + 100;
            tb.VerticalScrollBarVisibility = ScrollBarVisibility.Auto;
        }
        return tb;
    }

    private const string CssExample = @"body {
    font-family: 'Pretendard', 'Noto Sans KR', sans-serif;
    max-width: 900px;
    margin: 0 auto;
    padding: 40px;
    color: #1a1a2e;
    background: #f8f9fc;
    line-height: 1.8;
}
h1 { color: #2d3748; border-bottom: 2px solid #4a90d9; padding-bottom: 8px; }
h2 { color: #4a5568; margin-top: 2em; }
table { width: 100%; border-collapse: collapse; margin: 1.5em 0; }
th { background: #4a90d9; color: white; padding: 10px; text-align: left; }
td { padding: 8px 10px; border-bottom: 1px solid #e2e8f0; }
tr:nth-child(even) { background: #f0f4f8; }
";
}