using System;
using System.Collections.Generic;
using System.Linq;
using System.Xml.Linq;

namespace Data
{
    public class PawnDef : Define
    {
        public AttributesDef attributes;
        public string aiController;
        public string texturePath = null;
        public DrawingOrderDef
            drawingOrder_down,
            drawingOrder_up,
            drawingOrder_left,
            drawingOrder_right;

        public BehaviorTreeDef behaviorTree;
        public AffiliationDef affiliation;
        
        
        public DrawingOrderDef GetDrawingOrder(Orientation orientation)
        {
            // 定义一个临时变量用于存储结果
            DrawingOrderDef result = null;

            // 根据传入的 Orientation 获取对应的 DrawingOrderDef
            switch (orientation)
            {
                case Orientation.Down:
                    result = drawingOrder_down;
                    break;
                case Orientation.Up:
                    result = drawingOrder_up;
                    break;
                case Orientation.Left:
                    result = drawingOrder_left;
                    break;
                case Orientation.Right:
                    result = drawingOrder_right;
                    break;
                default:
                    throw new ArgumentException("Invalid orientation value.");
            }

            // 如果当前方向的结果为空，则尝试用 drawingOrder_down 填充
            if (result == null) result = drawingOrder_down;

            // 如果 drawingOrder_down 仍然为空，则尝试用其他非空方向填充
            if (result == null) result = drawingOrder_up ?? drawingOrder_left ?? drawingOrder_right;

            return result;
        }
    }
    public class MonsterDef:PawnDef
    {

    }

    public class BehaviorTreeDef : Define
    {
        public BehaviorTreeDef[] childTree;
        public string className="Selector";
        public string condition;
        
        
        public override bool Init(XElement xmlDef)
        {
            base.Init(xmlDef);

            // 从当前节点获取className和condition属性
            className = xmlDef.Attribute("className")?.Value ?? className;
            condition = xmlDef.Attribute("condition")?.Value;

            var nodes = xmlDef.Elements("Node");
            if (!nodes.Any())
                return true; // 没有子节点也是有效的
            
            List<BehaviorTreeDef> children = new();
            foreach (var node in nodes)
            {
                var childNode = new BehaviorTreeDef();
                if (!childNode.Init(node))
                    return false;
                children.Add(childNode);
            }

            childTree = children.ToArray();
            return true;
        }
    }

    public class AffiliationDef : Define
    {
        
    }
}