using System;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Input;
using System.Windows.Media;
using AxCopilot.Models;
using AxCopilot.Services;

namespace AxCopilot.Views;

public partial class ChatWindow
{
    private void EnterTitleEditMode(TextBlock titleTb, string conversationId, Brush titleColor)
    {
        try
        {
            var parent = titleTb.Parent as StackPanel;
            if (parent == null) return;

            var idx = parent.Children.IndexOf(titleTb);
            if (idx < 0) return;

            var editBox = new TextBox
            {
                Text = titleTb.Text,
                FontSize = 12.5,
                Foreground = titleColor,
                Background = Brushes.Transparent,
                BorderBrush = TryFindResource("AccentColor") as Brush ?? Brushes.Blue,
                BorderThickness = new Thickness(0, 0, 0, 1),
                CaretBrush = titleColor,
                Padding = new Thickness(0),
                Margin = new Thickness(0),
            };

            parent.Children.RemoveAt(idx);
            parent.Children.Insert(idx, editBox);

            var committed = false;
            void CommitEdit()
            {
                if (committed) return;
                committed = true;

                var newTitle = editBox.Text.Trim();
                if (string.IsNullOrEmpty(newTitle)) newTitle = titleTb.Text;

                titleTb.Text = newTitle;
                try
                {
                    var currentIdx = parent.Children.IndexOf(editBox);
                    if (currentIdx >= 0)
                    {
                        parent.Children.RemoveAt(currentIdx);
                        parent.Children.Insert(currentIdx, titleTb);
                    }
                }
                catch { }

                var conv = _storage.Load(conversationId);
                if (conv != null)
                {
                    conv.Title = newTitle;
                    _storage.Save(conv);
                    lock (_convLock)
                    {
                        if (_currentConversation?.Id == conversationId)
                        {
                            _currentConversation = ChatSession?.UpdateConversationMetadata(_activeTab, c => c.Title = newTitle, _storage) ?? _currentConversation;
                        }
                    }
                    UpdateChatTitle();
                }
            }

            void CancelEdit()
            {
                if (committed) return;
                committed = true;
                try
                {
                    var currentIdx = parent.Children.IndexOf(editBox);
                    if (currentIdx >= 0)
                    {
                        parent.Children.RemoveAt(currentIdx);
                        parent.Children.Insert(currentIdx, titleTb);
                    }
                }
                catch { }
            }

            editBox.KeyDown += (_, ke) =>
            {
                if (ke.Key == Key.Enter) { ke.Handled = true; CommitEdit(); }
                if (ke.Key == Key.Escape) { ke.Handled = true; CancelEdit(); }
            };
            editBox.LostFocus += (_, _) => CommitEdit();

            editBox.Focus();
            editBox.SelectAll();
        }
        catch (Exception ex)
        {
            LogService.Error($"제목 편집 오류: {ex.Message}");
        }
    }

    private void ShowConversationMenu(string conversationId)
    {
        var conv = _storage.Load(conversationId);
        var isPinned = conv?.Pinned ?? false;

        var bgBrush = TryFindResource("LauncherBackground") as Brush ?? new SolidColorBrush(Color.FromRgb(0x1A, 0x1B, 0x2E));
        var borderBrush = TryFindResource("BorderColor") as Brush ?? Brushes.Gray;
        var primaryText = TryFindResource("PrimaryText") as Brush ?? Brushes.White;
        var secondaryText = TryFindResource("SecondaryText") as Brush ?? Brushes.Gray;
        var hoverBg = TryFindResource("ItemHoverBackground") as Brush ?? new SolidColorBrush(Color.FromArgb(30, 255, 255, 255));

        var popup = new Popup
        {
            StaysOpen = false,
            AllowsTransparency = true,
            PopupAnimation = PopupAnimation.Fade,
            Placement = PlacementMode.MousePoint,
        };

        var container = new Border
        {
            Background = bgBrush,
            BorderBrush = borderBrush,
            BorderThickness = new Thickness(1),
            CornerRadius = new CornerRadius(12),
            Padding = new Thickness(6),
            MinWidth = 200,
            Effect = new System.Windows.Media.Effects.DropShadowEffect
            {
                BlurRadius = 16,
                ShadowDepth = 4,
                Opacity = 0.3,
                Color = Colors.Black,
            },
        };

        var stack = new StackPanel();

        Border CreateMenuItem(string icon, string text, Brush iconColor, Action onClick)
        {
            var item = new Border
            {
                Background = Brushes.Transparent,
                CornerRadius = new CornerRadius(8),
                Padding = new Thickness(10, 7, 10, 7),
                Margin = new Thickness(0, 1, 0, 1),
                Cursor = Cursors.Hand,
            };
            var g = new Grid();
            g.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(24) });
            g.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });

            var iconTb = new TextBlock
            {
                Text = icon,
                FontFamily = new FontFamily("Segoe MDL2 Assets"),
                FontSize = 12,
                Foreground = iconColor,
                VerticalAlignment = VerticalAlignment.Center,
            };
            Grid.SetColumn(iconTb, 0);
            g.Children.Add(iconTb);

            var textTb = new TextBlock
            {
                Text = text,
                FontSize = 12.5,
                Foreground = primaryText,
                VerticalAlignment = VerticalAlignment.Center,
            };
            Grid.SetColumn(textTb, 1);
            g.Children.Add(textTb);

            item.Child = g;
            item.MouseEnter += (s, _) => { if (s is Border b) b.Background = hoverBg; };
            item.MouseLeave += (s, _) => { if (s is Border b) b.Background = Brushes.Transparent; };
            item.MouseLeftButtonUp += (_, _) => { popup.IsOpen = false; onClick(); };
            return item;
        }

        Border CreateSeparator() => new()
        {
            Height = 1,
            Background = borderBrush,
            Opacity = 0.3,
            Margin = new Thickness(8, 4, 8, 4),
        };

        stack.Children.Add(CreateMenuItem(
            isPinned ? "\uE77A" : "\uE718",
            isPinned ? "고정 해제" : "상단 고정",
            TryFindResource("AccentColor") as Brush ?? Brushes.Blue,
            () =>
            {
                var c = _storage.Load(conversationId);
                if (c == null) return;

                c.Pinned = !c.Pinned;
                _storage.Save(c);
                lock (_convLock)
                {
                    if (_currentConversation?.Id == conversationId)
                    {
                        _currentConversation = ChatSession?.UpdateConversationMetadata(_activeTab, current => current.Pinned = c.Pinned, _storage) ?? _currentConversation;
                    }
                }
                RefreshConversationList();
            }));

        stack.Children.Add(CreateMenuItem("\uE8AC", "이름 변경", secondaryText, () =>
        {
            foreach (UIElement child in ConversationPanel.Children)
            {
                if (child is not Border b || b.Child is not Grid g) continue;
                foreach (UIElement gc in g.Children)
                {
                    if (gc is StackPanel sp && sp.Children.Count > 0 && sp.Children[0] is TextBlock tb)
                    {
                        if (conv != null && tb.Text == conv.Title)
                        {
                            var titleColor = TryFindResource("PrimaryText") as Brush ?? Brushes.White;
                            EnterTitleEditMode(tb, conversationId, titleColor);
                            return;
                        }
                    }
                }
            }
        }));

        if ((_activeTab == "Cowork" || _activeTab == "Code") && conv != null)
        {
            var catKey = conv.Category ?? ChatCategory.General;
            string catSymbol = "\uE8BD", catLabel = catKey, catColor = "#6B7280";
            var chatCat = ChatCategory.All.FirstOrDefault(c => c.Key == catKey);
            if (chatCat != default && chatCat.Key != ChatCategory.General)
            {
                catSymbol = chatCat.Symbol;
                catLabel = chatCat.Label;
                catColor = chatCat.Color;
            }
            else
            {
                var preset = Services.PresetService.GetByTabWithCustom(_activeTab, _settings.Settings.Llm.CustomPresets)
                    .FirstOrDefault(p => p.Category == catKey);
                if (preset != null)
                {
                    catSymbol = preset.Symbol;
                    catLabel = preset.Label;
                    catColor = preset.Color;
                }
            }

            stack.Children.Add(CreateSeparator());
            var infoSp = new StackPanel { Orientation = Orientation.Horizontal, Margin = new Thickness(10, 4, 10, 4) };
            try
            {
                var catBrush = new SolidColorBrush((Color)ColorConverter.ConvertFromString(catColor));
                infoSp.Children.Add(new TextBlock
                {
                    Text = catSymbol,
                    FontFamily = new FontFamily("Segoe MDL2 Assets"),
                    FontSize = 12,
                    Foreground = catBrush,
                    VerticalAlignment = VerticalAlignment.Center,
                    Margin = new Thickness(0, 0, 6, 0),
                });
                infoSp.Children.Add(new TextBlock
                {
                    Text = catLabel,
                    FontSize = 12,
                    Foreground = primaryText,
                    VerticalAlignment = VerticalAlignment.Center,
                });
            }
            catch
            {
                infoSp.Children.Add(new TextBlock { Text = catLabel, FontSize = 12, Foreground = primaryText });
            }
            stack.Children.Add(infoSp);
        }

        if (_activeTab == "Chat")
        {
            stack.Children.Add(CreateSeparator());
            stack.Children.Add(new TextBlock
            {
                Text = "분류 변경",
                FontSize = 10.5,
                Foreground = secondaryText,
                Margin = new Thickness(10, 4, 0, 4),
                FontWeight = FontWeights.SemiBold,
            });

            var currentCategory = conv?.Category ?? ChatCategory.General;
            var accentBrush = TryFindResource("AccentColor") as Brush ?? Brushes.CornflowerBlue;

            foreach (var (key, label, symbol, color) in ChatCategory.All)
            {
                var capturedKey = key;
                var isCurrentCat = capturedKey == currentCategory;

                var catItem = new Border
                {
                    Background = Brushes.Transparent,
                    CornerRadius = new CornerRadius(8),
                    Padding = new Thickness(10, 7, 10, 7),
                    Margin = new Thickness(0, 1, 0, 1),
                    Cursor = Cursors.Hand,
                };
                var catGrid = new Grid();
                catGrid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(24) });
                catGrid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
                catGrid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(20) });

                var catIcon = new TextBlock
                {
                    Text = symbol,
                    FontFamily = new FontFamily("Segoe MDL2 Assets"),
                    FontSize = 12,
                    Foreground = BrushFromHex(color),
                    VerticalAlignment = VerticalAlignment.Center,
                };
                Grid.SetColumn(catIcon, 0);
                catGrid.Children.Add(catIcon);

                var catText = new TextBlock
                {
                    Text = label,
                    FontSize = 12.5,
                    Foreground = primaryText,
                    VerticalAlignment = VerticalAlignment.Center,
                    FontWeight = isCurrentCat ? FontWeights.Bold : FontWeights.Normal,
                };
                Grid.SetColumn(catText, 1);
                catGrid.Children.Add(catText);

                if (isCurrentCat)
                {
                    var check = CreateSimpleCheck(accentBrush, 14);
                    Grid.SetColumn(check, 2);
                    catGrid.Children.Add(check);
                }

                catItem.Child = catGrid;
                catItem.MouseEnter += (s, _) => { if (s is Border b) b.Background = hoverBg; };
                catItem.MouseLeave += (s, _) => { if (s is Border b) b.Background = Brushes.Transparent; };
                catItem.MouseLeftButtonUp += (_, _) =>
                {
                    popup.IsOpen = false;
                    var c = _storage.Load(conversationId);
                    if (c == null) return;

                    c.Category = capturedKey;
                    var preset = Services.PresetService.GetByCategory(capturedKey);
                    if (preset != null)
                    {
                        c.SystemCommand = preset.SystemPrompt;
                    }
                    _storage.Save(c);

                    lock (_convLock)
                    {
                        if (_currentConversation?.Id == conversationId)
                        {
                            _currentConversation = ChatSession?.UpdateConversationMetadata(_activeTab, current =>
                            {
                                current.Category = capturedKey;
                                if (preset != null)
                                {
                                    current.SystemCommand = preset.SystemPrompt;
                                }
                            }, _storage) ?? _currentConversation;
                        }
                    }

                    bool isCurrent;
                    lock (_convLock) { isCurrent = _currentConversation?.Id == conversationId; }
                    if (isCurrent && preset != null && !string.IsNullOrEmpty(preset.Placeholder))
                    {
                        _promptCardPlaceholder = preset.Placeholder;
                        UpdateWatermarkVisibility();
                        if (string.IsNullOrEmpty(InputBox.Text))
                        {
                            InputWatermark.Text = preset.Placeholder;
                            InputWatermark.Visibility = Visibility.Visible;
                        }
                    }
                    else if (isCurrent)
                    {
                        ClearPromptCardPlaceholder();
                    }

                    RefreshConversationList();
                };
                stack.Children.Add(catItem);
            }
        }

        stack.Children.Add(CreateSeparator());
        stack.Children.Add(CreateMenuItem("\uE74D", "이 대화 삭제", Brushes.IndianRed, () =>
        {
            var result = CustomMessageBox.Show("이 대화를 삭제하시겠습니까?", "대화 삭제",
                MessageBoxButton.YesNo, MessageBoxImage.Question);
            if (result != MessageBoxResult.Yes) return;

            _storage.Delete(conversationId);
            lock (_convLock)
            {
                if (_currentConversation?.Id == conversationId)
                {
                    _currentConversation = null;
                    MessagePanel.Children.Clear();
                    EmptyState.Visibility = Visibility.Visible;
                    UpdateChatTitle();
                }
            }
            RefreshConversationList();
        }));

        container.Child = stack;
        popup.Child = container;
        popup.IsOpen = true;
    }
}