using Lattice.Core.Docking.Models;
using Microsoft.UI.Input;
using Microsoft.UI.Xaml.Controls;
using Microsoft.UI.Xaml.Input;
using Microsoft.UI.Xaml.Media;
using System;

namespace Lattice.UI;

public class LatticeSplitter : Control
{
    public LatticeSplitter()
    {
        this.DefaultStyleKey = typeof(LatticeSplitter);
        this.ManipulationMode = ManipulationModes.TranslateX | ManipulationModes.TranslateY;

        this.PointerEntered += (s, e) =>
            this.ProtectedCursor = InputSystemCursor.Create(InputSystemCursorShape.SizeWestEast);
        this.PointerExited += (s, e) =>
            this.ProtectedCursor = null;

        this.ManipulationDelta += OnManipulationDelta;
    }

    private void OnManipulationDelta(object sender, ManipulationDeltaRoutedEventArgs e)
    {
        // 1. Находим модель DockGroup через DataContext
        if (this.DataContext is not DockGroup group) return;

        // 2. Находим родительский Grid, чтобы знать общие размеры
        if (VisualTreeHelper.GetParent(this) is not Grid parentGrid ||
            parentGrid.ActualWidth <= 0 || parentGrid.ActualHeight <= 0)
            return;

        double totalSize = group.Orientation == SplitDirection.Horizontal
            ? parentGrid.ActualWidth
            : parentGrid.ActualHeight;

        if (totalSize <= 0) return;

        // 3. Вычисляем изменение Ratio (от -1.0 до 1.0)
        double delta = group.Orientation == SplitDirection.Horizontal
            ? e.Delta.Translation.X
            : e.Delta.Translation.Y;

        double ratioChange = delta / totalSize;

        // 4. Обновляем модель (с ограничением от 0.05 до 0.95)
        group.SplitRatio = Math.Clamp(group.SplitRatio + ratioChange, 0.05, 0.95);
    }
}