using System;
using System.IO;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Input;
using System.Windows.Media;
using AxCopilot.Services;
using AxCopilot.Services.Agent;

namespace AxCopilot.Views;

public partial class ChatWindow
{
    private void ShowWorktreeMenu(UIElement placementTarget)
    {
        var (popup, panel) = CreateThemedPopupMenu(placementTarget, PlacementMode.Top, 320);
        var primaryText = TryFindResource("PrimaryText") as Brush ?? Brushes.White;
        var secondaryText = TryFindResource("SecondaryText") as Brush ?? Brushes.Gray;
        var accentBrush = TryFindResource("AccentColor") as Brush ?? Brushes.CornflowerBlue;
        var currentFolder = GetCurrentWorkFolder();
        var root = string.IsNullOrWhiteSpace(currentFolder) ? "" : WorktreeStateStore.ResolveRoot(currentFolder);
        var active = string.IsNullOrWhiteSpace(root) ? currentFolder : WorktreeStateStore.Load(root).Active;
        var variants = GetAvailableWorkspaceVariants(root, active);

        panel.Children.Add(CreatePopupSummaryStrip(new[]
        {
            ("모드", string.Equals(active, root, StringComparison.OrdinalIgnoreCase) ? "로컬" : "워크트리", "#F8FAFC", "#E2E8F0", "#475569"),
            ("변형", variants.Count.ToString(), "#EFF6FF", "#BFDBFE", "#1D4ED8"),
        }));
        panel.Children.Add(CreatePopupSectionLabel("현재 작업 위치", new Thickness(8, 6, 8, 4)));

        panel.Children.Add(CreatePopupMenuRow(
            "\uED25",
            "로컬",
            string.IsNullOrWhiteSpace(root) ? "현재 워크스페이스" : root,
            !string.IsNullOrWhiteSpace(root) && string.Equals(active, root, StringComparison.OrdinalIgnoreCase),
            accentBrush,
            secondaryText,
            primaryText,
            () =>
            {
                popup.IsOpen = false;
                if (!string.IsNullOrWhiteSpace(root))
                    SwitchToWorkspace(root, root);
            }));

        if (!string.IsNullOrWhiteSpace(active) && !string.Equals(active, root, StringComparison.OrdinalIgnoreCase))
        {
            panel.Children.Add(CreatePopupMenuRow(
                "\uE7BA",
                Path.GetFileName(active),
                active,
                true,
                accentBrush,
                secondaryText,
                primaryText,
                () =>
                {
                    popup.IsOpen = false;
                    SwitchToWorkspace(active, root);
                }));
        }

        if (variants.Count > 0)
        {
            panel.Children.Add(CreatePopupSectionLabel($"워크트리 / 복사본 · {variants.Count}", new Thickness(8, 10, 8, 4)));
            foreach (var variant in variants)
            {
                var isActive = !string.IsNullOrWhiteSpace(active) &&
                               string.Equals(Path.GetFullPath(variant), Path.GetFullPath(active), StringComparison.OrdinalIgnoreCase);
                panel.Children.Add(CreatePopupMenuRow(
                    "\uE8B7",
                    Path.GetFileName(variant),
                    isActive ? $"현재 선택 · {variant}" : variant,
                    isActive,
                    accentBrush,
                    secondaryText,
                    primaryText,
                    () =>
                    {
                        popup.IsOpen = false;
                        SwitchToWorkspace(variant, root);
                    }));
            }
        }

        panel.Children.Add(CreatePopupSectionLabel("새 작업 위치", new Thickness(8, 10, 8, 4)));
        panel.Children.Add(CreatePopupMenuRow(
            "\uE943",
            "현재 브랜치로 워크트리 생성",
            "Git 저장소면 분리된 작업 복사본을 만들고 전환합니다",
            false,
            accentBrush,
            secondaryText,
            primaryText,
            () =>
            {
                popup.IsOpen = false;
                _ = CreateCurrentBranchWorktreeAsync();
            }));

        popup.IsOpen = true;
    }

    private Border CreatePopupMenuRow(
        string icon,
        string title,
        string description,
        bool selected,
        Brush accentBrush,
        Brush secondaryText,
        Brush primaryText,
        Action? onClick)
    {
        var hintBackground = TryFindResource("HintBackground") as Brush ?? BrushFromHex("#F8FAFC");
        var hoverBackground = TryFindResource("ItemHoverBackground") as Brush ?? BrushFromHex("#F8FAFC");
        var row = new Border
        {
            Background = selected ? hintBackground : Brushes.Transparent,
            BorderBrush = selected ? BrushFromHex("#D6E4FF") : Brushes.Transparent,
            BorderThickness = new Thickness(1),
            CornerRadius = new CornerRadius(12),
            Padding = new Thickness(12, 10, 12, 10),
            Cursor = Cursors.Hand,
            Margin = new Thickness(0, 0, 0, 6),
        };

        var grid = new Grid();
        grid.ColumnDefinitions.Add(new ColumnDefinition { Width = GridLength.Auto });
        grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
        grid.ColumnDefinitions.Add(new ColumnDefinition { Width = GridLength.Auto });

        var iconBlock = new TextBlock
        {
            Text = icon,
            FontFamily = new FontFamily("Segoe MDL2 Assets"),
            FontSize = 14,
            Foreground = selected ? accentBrush : secondaryText,
            Margin = new Thickness(0, 1, 10, 0),
            VerticalAlignment = VerticalAlignment.Center,
        };
        grid.Children.Add(iconBlock);

        var textStack = new StackPanel();
        textStack.Children.Add(new TextBlock
        {
            Text = title,
            FontSize = 13.5,
            FontWeight = selected ? FontWeights.SemiBold : FontWeights.Medium,
            Foreground = primaryText,
        });
        if (!string.IsNullOrWhiteSpace(description))
        {
            textStack.Children.Add(new TextBlock
            {
                Text = description,
                FontSize = 11.5,
                Foreground = secondaryText,
                Margin = new Thickness(0, 3, 0, 0),
                TextWrapping = TextWrapping.Wrap,
            });
        }

        Grid.SetColumn(textStack, 1);
        grid.Children.Add(textStack);

        if (selected)
        {
            var check = CreateSimpleCheck(accentBrush, 14);
            Grid.SetColumn(check, 2);
            check.Margin = new Thickness(10, 0, 0, 0);
            if (check is FrameworkElement element)
                element.VerticalAlignment = VerticalAlignment.Center;
            grid.Children.Add(check);
        }

        row.Child = grid;
        row.MouseEnter += (_, _) => row.Background = selected ? hintBackground : hoverBackground;
        row.MouseLeave += (_, _) => row.Background = selected ? hintBackground : Brushes.Transparent;
        row.MouseLeftButtonUp += (_, _) => onClick?.Invoke();
        return row;
    }
}