using System.Collections.Generic;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;

namespace DrillTools
{
    /// <summary>
    /// ToolReorderConfirmationWindow.xaml 的交互逻辑
    /// </summary>
    public partial class ToolReorderConfirmationWindow : Window
    {
        /// <summary>
        /// 是否确认重排
        /// </summary>
        public bool IsConfirmed { get; private set; }

        /// <summary>
        /// 构造函数
        /// </summary>
        public ToolReorderConfirmationWindow()
        {
            InitializeComponent();
            DataContext = new ToolReorderConfirmationViewModel();
        }

        /// <summary>
        /// 使用原始和重排后的刀具列表初始化窗口
        /// </summary>
        /// <param name="originalTools">原始刀具列表</param>
        /// <param name="reorderedTools">重排后刀具列表</param>
        public ToolReorderConfirmationWindow(IEnumerable<ToolItem> originalTools, IEnumerable<ToolItem> reorderedTools) : this()
        {
            if (DataContext is ToolReorderConfirmationViewModel viewModel)
            {
                viewModel.LoadTools(originalTools, reorderedTools);
            }
        }

        /// <summary>
        /// 确认按钮点击事件
        /// </summary>
        private void ConfirmButton_Click(object sender, RoutedEventArgs e)
        {
            IsConfirmed = true;
            Close();
        }

        /// <summary>
        /// 取消按钮点击事件
        /// </summary>
        private void CancelButton_Click(object sender, RoutedEventArgs e)
        {
            IsConfirmed = false;
            Close();
        }

        /// <summary>
        /// 原始刀序列表滚动事件处理
        /// </summary>
        private void OriginalToolsListView_ScrollChanged(object sender, ScrollChangedEventArgs e)
        {
            if (sender is System.Windows.Controls.ListView listView && e.VerticalChange != 0)
            {
                // 获取原始列表的滚动位置
                var scrollViewer = GetScrollViewer(listView);
                if (scrollViewer != null)
                {
                    // 同步到重排后列表
                    var reorderedScrollViewer = GetScrollViewer(ReorderedToolsListView);
                    if (reorderedScrollViewer != null)
                    {
                        reorderedScrollViewer.ScrollToVerticalOffset(scrollViewer.VerticalOffset);
                    }
                }
            }
        }

        /// <summary>
        /// 重排后刀序列表滚动事件处理
        /// </summary>
        private void ReorderedToolsListView_ScrollChanged(object sender, ScrollChangedEventArgs e)
        {
            if (sender is System.Windows.Controls.ListView listView && e.VerticalChange != 0)
            {
                // 获取重排后列表的滚动位置
                var scrollViewer = GetScrollViewer(listView);
                if (scrollViewer != null)
                {
                    // 同步到原始列表
                    var originalScrollViewer = GetScrollViewer(OriginalToolsListView);
                    if (originalScrollViewer != null)
                    {
                        originalScrollViewer.ScrollToVerticalOffset(scrollViewer.VerticalOffset);
                    }
                }
            }
        }

        /// <summary>
        /// 获取ListView中的ScrollViewer控件
        /// </summary>
        /// <param name="listView">ListView控件</param>
        /// <returns>ScrollViewer控件</returns>
        private ScrollViewer GetScrollViewer(System.Windows.Controls.ListView listView)
        {
            if (listView == null)
                return null;

            // 使用VisualTreeHelper查找ScrollViewer
            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(listView); i++)
            {
                var child = VisualTreeHelper.GetChild(listView, i);
                if (child is ScrollViewer scrollViewer)
                {
                    return scrollViewer;
                }
                // 递归查找子控件
                var result = GetScrollViewerFromChild(child);
                if (result != null)
                    return result;
            }
            return null;
        }

        /// <summary>
        /// 从子控件中递归查找ScrollViewer
        /// </summary>
        /// <param name="parent">父控件</param>
        /// <returns>ScrollViewer控件</returns>
        private ScrollViewer GetScrollViewerFromChild(DependencyObject parent)
        {
            if (parent == null)
                return null;

            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(parent); i++)
            {
                var child = VisualTreeHelper.GetChild(parent, i);
                if (child is ScrollViewer scrollViewer)
                {
                    return scrollViewer;
                }
                // 递归查找
                var result = GetScrollViewerFromChild(child);
                if (result != null)
                    return result;
            }
            return null;
        }
    }
}