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

namespace AxCopilot.Views;

/// <summary>모델 등록/편집 다이얼로그. 별칭 + 실제 모델명 입력.</summary>
internal sealed class ModelRegistrationDialog : Window
{
    private readonly TextBox _aliasBox;
    private readonly TextBox _modelBox;
    private readonly TextBox _endpointBox;
    private readonly TextBox _apiKeyBox;

    // CP4D 인증 필드
    private readonly ComboBox _authTypeBox;
    private readonly StackPanel _cp4dPanel;
    private readonly TextBox _cp4dUrlBox;
    private readonly TextBox _cp4dUsernameBox;
    private readonly PasswordBox _cp4dPasswordBox;

    public string ModelAlias => _aliasBox.Text.Trim();
    public string ModelName => _modelBox.Text.Trim();
    public string Endpoint => _endpointBox.Text.Trim();
    public string ApiKey => _apiKeyBox.Text.Trim();
    public string AuthType => (_authTypeBox.SelectedItem as ComboBoxItem)?.Tag?.ToString() ?? "bearer";
    public string Cp4dUrl => _cp4dUrlBox.Text.Trim();
    public string Cp4dUsername => _cp4dUsernameBox.Text.Trim();
    public string Cp4dPassword => _cp4dPasswordBox.Password.Trim();

    public ModelRegistrationDialog(string service, string existingAlias = "", string existingModel = "",
        string existingEndpoint = "", string existingApiKey = "",
        string existingAuthType = "bearer", string existingCp4dUrl = "",
        string existingCp4dUsername = "", string existingCp4dPassword = "")
    {
        bool isEdit = !string.IsNullOrEmpty(existingAlias);
        Title = isEdit ? "모델 편집" : "모델 추가";
        Width = 420;
        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;

        // 루트 컨테이너
        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 = "\uEA86",
            FontFamily = ThemeResourceHelper.SegoeMdl2,
            FontSize = 18,
            Foreground = accentBrush,
            VerticalAlignment = VerticalAlignment.Center,
            Margin = new Thickness(0, 0, 10, 0),
        });
        header.Children.Add(new TextBlock
        {
            Text = isEdit ? "모델 편집" : "새 모델 등록",
            FontSize = 17,
            FontWeight = FontWeights.Bold,
            Foreground = primaryText,
            VerticalAlignment = VerticalAlignment.Center,
        });
        stack.Children.Add(header);

        // 서비스 표시
        var serviceLabel = service == "vllm" ? "vLLM" : "Ollama";
        var serviceBadge = new Border
        {
            Background = accentBrush,
            CornerRadius = new CornerRadius(6),
            Padding = new Thickness(10, 3, 10, 3),
            Margin = new Thickness(0, 0, 0, 16),
            HorizontalAlignment = HorizontalAlignment.Left,
            Opacity = 0.85,
        };
        serviceBadge.Child = new TextBlock
        {
            Text = $"{serviceLabel} 서비스",
            FontSize = 11,
            FontWeight = FontWeights.SemiBold,
            Foreground = Brushes.White,
        };
        stack.Children.Add(serviceBadge);

        // 별칭 입력
        stack.Children.Add(new TextBlock
        {
            Text = "별칭 (표시 이름)",
            FontSize = 12,
            FontWeight = FontWeights.SemiBold,
            Foreground = primaryText,
            Margin = new Thickness(0, 0, 0, 6),
        });
        stack.Children.Add(new TextBlock
        {
            Text = "채팅 화면에서 표시될 이름입니다. 예: 코드 리뷰 전용, 일반 대화",
            FontSize = 11,
            Foreground = secondaryText,
            Margin = new Thickness(0, 0, 0, 8),
        });
        _aliasBox = new TextBox
        {
            Text = existingAlias,
            FontSize = 13,
            Padding = new Thickness(12, 8, 12, 8),
            Foreground = primaryText,
            Background = itemBg,
            CaretBrush = accentBrush,
            BorderBrush = borderBrush,
            BorderThickness = new Thickness(1),
        };
        var aliasBorder = new Border { CornerRadius = new CornerRadius(8), ClipToBounds = true, Child = _aliasBox };
        stack.Children.Add(aliasBorder);

        // 구분선
        stack.Children.Add(new Rectangle
        {
            Height = 1,
            Fill = borderBrush,
            Margin = new Thickness(0, 16, 0, 16),
            Opacity = 0.5,
        });

        // 모델명 입력
        stack.Children.Add(new TextBlock
        {
            Text = "실제 모델명",
            FontSize = 12,
            FontWeight = FontWeights.SemiBold,
            Foreground = primaryText,
            Margin = new Thickness(0, 0, 0, 6),
        });
        stack.Children.Add(new TextBlock
        {
            Text = "서버에 배포된 실제 모델 ID (예: llama3:8b, qwen2:7b)",
            FontSize = 11,
            Foreground = secondaryText,
            Margin = new Thickness(0, 0, 0, 8),
        });
        _modelBox = new TextBox
        {
            Text = existingModel,
            FontSize = 13,
            Padding = new Thickness(12, 8, 12, 8),
            Foreground = primaryText,
            Background = itemBg,
            CaretBrush = accentBrush,
            BorderBrush = borderBrush,
            BorderThickness = new Thickness(1),
        };
        var modelBorder = new Border { CornerRadius = new CornerRadius(8), ClipToBounds = true, Child = _modelBox };
        stack.Children.Add(modelBorder);

        // 구분선
        stack.Children.Add(new Rectangle
        {
            Height = 1, Fill = borderBrush,
            Margin = new Thickness(0, 16, 0, 16), Opacity = 0.5,
        });

        // 서버 엔드포인트 입력
        stack.Children.Add(new TextBlock
        {
            Text = "서버 엔드포인트 (선택)",
            FontSize = 12, FontWeight = FontWeights.SemiBold,
            Foreground = primaryText, Margin = new Thickness(0, 0, 0, 6),
        });
        stack.Children.Add(new TextBlock
        {
            Text = "이 모델 전용 서버 주소. 비워두면 기본 엔드포인트를 사용합니다.",
            FontSize = 11, Foreground = secondaryText, Margin = new Thickness(0, 0, 0, 8),
        });
        _endpointBox = new TextBox
        {
            Text = existingEndpoint,
            FontSize = 13, Padding = new Thickness(12, 8, 12, 8),
            Foreground = primaryText, Background = itemBg,
            CaretBrush = accentBrush, BorderBrush = borderBrush, BorderThickness = new Thickness(1),
        };
        stack.Children.Add(new Border { CornerRadius = new CornerRadius(8), ClipToBounds = true, Child = _endpointBox });

        // ── 인증 방식 선택 ──────────────────────────────────────────────────
        stack.Children.Add(new TextBlock
        {
            Text = "인증 방식",
            FontSize = 12, FontWeight = FontWeights.SemiBold,
            Foreground = primaryText, Margin = new Thickness(0, 10, 0, 6),
        });
        _authTypeBox = new ComboBox
        {
            FontSize = 13, Padding = new Thickness(8, 6, 8, 6),
            Foreground = primaryText, Background = itemBg,
            BorderBrush = borderBrush, BorderThickness = new Thickness(1),
        };
        var bearerItem = new ComboBoxItem { Content = "Bearer 토큰 (API 키)", Tag = "bearer" };
        var cp4dItem = new ComboBoxItem { Content = "CP4D (IBM Cloud Pak for Data)", Tag = "cp4d" };
        _authTypeBox.Items.Add(bearerItem);
        _authTypeBox.Items.Add(cp4dItem);
        _authTypeBox.SelectedItem = existingAuthType == "cp4d" ? cp4dItem : bearerItem;
        stack.Children.Add(new Border { CornerRadius = new CornerRadius(8), ClipToBounds = true, Child = _authTypeBox });

        // ── Bearer 인증: API 키 입력 ────────────────────────────────────────
        var apiKeyPanel = new StackPanel();
        apiKeyPanel.Children.Add(new TextBlock
        {
            Text = "API 키 (선택)",
            FontSize = 12, FontWeight = FontWeights.SemiBold,
            Foreground = primaryText, Margin = new Thickness(0, 10, 0, 6),
        });
        _apiKeyBox = new TextBox
        {
            Text = existingApiKey,
            FontSize = 13, Padding = new Thickness(12, 8, 12, 8),
            Foreground = primaryText, Background = itemBg,
            CaretBrush = accentBrush, BorderBrush = borderBrush, BorderThickness = new Thickness(1),
        };
        apiKeyPanel.Children.Add(new Border { CornerRadius = new CornerRadius(8), ClipToBounds = true, Child = _apiKeyBox });
        stack.Children.Add(apiKeyPanel);

        // ── CP4D 인증: URL + 사용자명 + 비밀번호 ────────────────────────────
        _cp4dPanel = new StackPanel { Visibility = existingAuthType == "cp4d" ? Visibility.Visible : Visibility.Collapsed };

        _cp4dPanel.Children.Add(new TextBlock
        {
            Text = "CP4D 서버 URL",
            FontSize = 12, FontWeight = FontWeights.SemiBold,
            Foreground = primaryText, Margin = new Thickness(0, 10, 0, 6),
        });
        _cp4dPanel.Children.Add(new TextBlock
        {
            Text = "예: https://cpd-host.example.com",
            FontSize = 11, Foreground = secondaryText, Margin = new Thickness(0, 0, 0, 6),
        });
        _cp4dUrlBox = new TextBox
        {
            Text = existingCp4dUrl,
            FontSize = 13, Padding = new Thickness(12, 8, 12, 8),
            Foreground = primaryText, Background = itemBg,
            CaretBrush = accentBrush, BorderBrush = borderBrush, BorderThickness = new Thickness(1),
        };
        _cp4dPanel.Children.Add(new Border { CornerRadius = new CornerRadius(8), ClipToBounds = true, Child = _cp4dUrlBox });

        _cp4dPanel.Children.Add(new TextBlock
        {
            Text = "사용자 이름",
            FontSize = 12, FontWeight = FontWeights.SemiBold,
            Foreground = primaryText, Margin = new Thickness(0, 10, 0, 6),
        });
        _cp4dUsernameBox = new TextBox
        {
            Text = existingCp4dUsername,
            FontSize = 13, Padding = new Thickness(12, 8, 12, 8),
            Foreground = primaryText, Background = itemBg,
            CaretBrush = accentBrush, BorderBrush = borderBrush, BorderThickness = new Thickness(1),
        };
        _cp4dPanel.Children.Add(new Border { CornerRadius = new CornerRadius(8), ClipToBounds = true, Child = _cp4dUsernameBox });

        _cp4dPanel.Children.Add(new TextBlock
        {
            Text = "비밀번호 / API 키",
            FontSize = 12, FontWeight = FontWeights.SemiBold,
            Foreground = primaryText, Margin = new Thickness(0, 10, 0, 6),
        });
        _cp4dPasswordBox = new PasswordBox
        {
            Password = existingCp4dPassword,
            FontSize = 13, Padding = new Thickness(12, 8, 12, 8),
            Foreground = primaryText, Background = itemBg,
            CaretBrush = accentBrush, BorderBrush = borderBrush, BorderThickness = new Thickness(1),
        };
        _cp4dPanel.Children.Add(new Border { CornerRadius = new CornerRadius(8), ClipToBounds = true, Child = _cp4dPasswordBox });

        stack.Children.Add(_cp4dPanel);

        // 인증 방식 전환 시 패널 표시/숨김
        _authTypeBox.SelectionChanged += (_, _) =>
        {
            var isCp4d = AuthType == "cp4d";
            _cp4dPanel.Visibility = isCp4d ? Visibility.Visible : Visibility.Collapsed;
            apiKeyPanel.Visibility = isCp4d ? Visibility.Collapsed : Visibility.Visible;
        };
        // 초기 상태 설정
        apiKeyPanel.Visibility = existingAuthType == "cp4d" ? Visibility.Collapsed : Visibility.Visible;

        // 보안 안내
        var securityNote = new StackPanel
        {
            Orientation = Orientation.Horizontal,
            Margin = new Thickness(0, 12, 0, 0),
        };
        securityNote.Children.Add(new TextBlock
        {
            Text = "\uE72E",
            FontFamily = ThemeResourceHelper.SegoeMdl2,
            FontSize = 11,
            Foreground = new SolidColorBrush(Color.FromRgb(0x38, 0xA1, 0x69)),
            VerticalAlignment = VerticalAlignment.Center,
            Margin = new Thickness(0, 0, 6, 0),
        });
        securityNote.Children.Add(new TextBlock
        {
            Text = "모델명은 AES-256으로 암호화되어 설정 파일에 저장됩니다",
            FontSize = 10.5,
            Foreground = secondaryText,
            VerticalAlignment = VerticalAlignment.Center,
        });
        stack.Children.Add(securityNote);

        // 버튼 바
        var btnBar = new StackPanel
        {
            Orientation = Orientation.Horizontal,
            HorizontalAlignment = HorizontalAlignment.Right,
            Margin = new Thickness(0, 24, 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" : "등록",
            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 += (_, _) =>
        {
            if (string.IsNullOrWhiteSpace(_aliasBox.Text))
            {
                CustomMessageBox.Show("별칭을 입력하세요.", "입력 오류", MessageBoxButton.OK, MessageBoxImage.Warning);
                _aliasBox.Focus();
                return;
            }
            if (string.IsNullOrWhiteSpace(_modelBox.Text))
            {
                CustomMessageBox.Show("모델명을 입력하세요.", "입력 오류", MessageBoxButton.OK, MessageBoxImage.Warning);
                _modelBox.Focus();
                return;
            }
            DialogResult = true;
            Close();
        };
        btnBar.Children.Add(okBtn);
        stack.Children.Add(btnBar);

        root.Child = stack;
        Content = root;

        // 키보드 핸들링
        KeyDown += (_, ke) =>
        {
            if (ke.Key == Key.Escape) { DialogResult = false; Close(); }
        };
        Loaded += (_, _) => { _aliasBox.Focus(); _aliasBox.SelectAll(); };

        // 드래그 이동
        root.MouseLeftButtonDown += (_, me) =>
        {
            if (me.LeftButton == System.Windows.Input.MouseButtonState.Pressed)
                try { DragMove(); } catch (Exception) { }
        };
    }
}