using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;
using TeamAAS.FlowEditor.Models;

namespace TeamAAS.FlowEditor.Controls
{
    /// <summary>
    /// 节点控件
    /// </summary>
    public class NodeControl : System.Windows.Controls.Control
    {
        public const double DefaultWidth = 160;
        public const double DefaultHeight = 42;

        static NodeControl()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(NodeControl),
                new FrameworkPropertyMetadata(typeof(NodeControl)));
        }

        /// <summary>
        /// 获取绑定的 FlowNode
        /// </summary>
        public FlowNode GetNode()
        {
            return DataContext as FlowNode;
        }

        private Border _rectNode;
        private Border _loopNode;
        private Border _groupMainBorder;
        private Border _endMainBorder;
        private Border _exceptionBranchNode;
        private Path _diamondPath;

        public override void OnApplyTemplate()
        {
            base.OnApplyTemplate();
            _rectNode = GetTemplateChild("RectNode") as Border;
            _loopNode = GetTemplateChild("LoopNode") as Border;
            _groupMainBorder = GetTemplateChild("GroupMainBorder") as Border;
            _endMainBorder = GetTemplateChild("EndMainBorder") as Border;
            _exceptionBranchNode = GetTemplateChild("ExceptionBranchNode") as Border;
            _diamondPath = GetTemplateChild("DiamondPath") as Path;
            UpdateDisabledVisual();
        }

        /// <summary>
        /// 根据 IsEnabled 更新禁用视觉（仅中间文本背景变灰，边框/色条/文字不变）
        /// </summary>
        public void UpdateDisabledVisual()
        {
            var node = GetNode();
            bool disabled = node == null || !node.IsEnabled;
            string key = disabled ? "SecondaryTextBrush" : "RegionBrush";

            if (_rectNode != null) _rectNode.SetResourceReference(BackgroundProperty, key);
            if (_loopNode != null) _loopNode.SetResourceReference(BackgroundProperty, key);
            if (_groupMainBorder != null) _groupMainBorder.SetResourceReference(BackgroundProperty, key);
            if (_endMainBorder != null) _endMainBorder.SetResourceReference(BackgroundProperty, key);
            if (_exceptionBranchNode != null) _exceptionBranchNode.SetResourceReference(BackgroundProperty, key);
            if (_diamondPath != null) _diamondPath.SetResourceReference(Path.FillProperty, key);
        }
    }
}