using System;
using System.Collections.Generic;
using System.Linq;
using Sirenix.OdinInspector;
using SoftCircuits.Collections;
using UnityEngine;

namespace Cielonos.MainGame.Inventory
{
    /// <summary>
    /// 存储连招树定义的 ScriptableObject。
    /// 这是你的“蓝图”资产。
    /// </summary>
    [CreateAssetMenu(fileName = "ComboData", menuName = "Cielonos/Items/ComboData")]
    public class ComboData : SerializedScriptableObject
    {
        //[InlineProperty] public ComboTreeData tree;
        
        [InlineProperty]
        [Title("连招树编辑器", "可视化编辑连招树的节点和分支")]
        public Dictionary<string, ComboTreeData> comboTrees;

        public ComboTreeData mainTree => comboTrees["Main"];

        [OnInspectorInit]
        private void OnEnable()
        {
            if (comboTrees == null)
            {
                comboTrees = new Dictionary<string, ComboTreeData>();
                ComboTreeData tree = new ComboTreeData();
                if (tree.nodes == null || tree.nodes.Count == 0)
                {
                    tree.nodes = new List<ComboNodeData>();
                    tree.nodes.Add(new ComboNodeData() { referenceName = "Root" });
                }

                tree.InitializeNodeReferences();
                comboTrees["Main"] = tree;
            }
        }
    }

    /// <summary>
    /// 连招树的数据容器
    /// </summary>
    [Serializable]
    public class ComboTreeData
    {
        public float resetTime = 0.2f;
        
        [ListDrawerSettings(
            DraggableItems = true, // 现在可以安全地拖动排序了！
            NumberOfItemsPerPage = 20,
            CustomAddFunction = "AddNode",
            CustomRemoveElementFunction = "RemoveNode",
            ListElementLabelName = "GetComboNodeLabel")]
        [HideReferenceObjectPicker]
        public List<ComboNodeData> nodes;
        
        /// <summary>
        /// Odin Inspector 自定义添加按钮的实现
        /// </summary>
        private void AddNode()
        {
            // 查找一个唯一的默认名称
            int counter = nodes.Count - 1;
            string newName = counter.ToString();
            while (nodes.Any(n => n.referenceName == newName))
            {
                counter++;
                newName = counter.ToString();
            }

            var newNode = new ComboNodeData() { referenceName = newName };
            nodes.Add(newNode);

            // 添加后，立即初始化引用
            InitializeNodeReferences();
        }

        /// <summary>
        /// Odin Inspector 自定义移除按钮的实现
        /// </summary>
        private void RemoveNode(ComboNodeData node)
        {
            // 规则：不可删除 RootNode
            if (node.referenceName == "Root")
            {
                Debug.LogWarning("不能删除 Root 节点。");
                return;
            }

            nodes.Remove(node);
            InitializeNodeReferences(); // 移除后，更新引用
        }

        /// <summary>
        /// 将父树实例传递给所有节点（和分支），用于Odin下拉列表
        /// </summary>
        public void InitializeNodeReferences()
        {
            if (nodes == null) return;
        }

        /// <summary>
        /// 帮助 Odin 下拉列表获取所有可用节点名称
        /// </summary>
        public IEnumerable<string> GetNodeReferenceNames()
        {
            if (nodes == null) return Enumerable.Empty<string>();
            return nodes.Select(n => n.referenceName).Where(n => !string.IsNullOrEmpty(n));
        }

        public ComboSubmodule.ComboTree ToRuntime(ComboSubmodule owner)
        {
            var runtimeTree = new ComboSubmodule.ComboTree(owner, resetTime);
            runtimeTree.nodes = new List<ComboSubmodule.ComboTree.Node>();

            // 创建运行时节点
            foreach (var nodeData in nodes)
            {
                var runtimeNode = new ComboSubmodule.ComboTree.Node(nodes.IndexOf(nodeData), nodeData.referenceName);
                runtimeNode.branches = new List<ComboSubmodule.ComboTree.Branch>();
                // 创建运行时分支
                foreach (var branchData in nodeData.branches)
                {
                    var runtimeBranch = new ComboSubmodule.ComboTree.Branch(nodes.FindIndex(n => n.referenceName == branchData.nextNodeRefName), branchData.operation);
                    runtimeNode.branches.Add(runtimeBranch);
                }

                runtimeTree.nodes.Add(runtimeNode);
            }

            return runtimeTree;
        }
        
    }

    /// <summary>
    /// 连招节点的数据定义
    /// </summary>
    [Serializable]
    public class ComboNodeData
    {
        [ValidateInput("ValidateReferenceName", "引用名称(Reference Name)必须唯一且不能为空。")]
        [InfoBox("这是 Root 节点，是所有连招的起点。", InfoMessageType.Info, "IsRootNode")]
        public string referenceName;

        [ListDrawerSettings(NumberOfItemsPerPage = 10, CustomAddFunction = "AddBranch")]
        [HideReferenceObjectPicker]
        public List<ComboBranchData> branches = new List<ComboBranchData>();
        
        private bool IsRootNode() => referenceName == "Root";

        private bool ValidateReferenceName(string name, ref string errorMessage)
        {
            if (string.IsNullOrEmpty(name))
            {
                errorMessage = "引用名称不能为空。";
                return false;
            }

            return true;
        }
        
        private void AddBranch()
        {
            branches.Add(new ComboBranchData());
        }
        
        private string GetComboNodeLabel()
        {
            // 1. 获取当前节点名称
            string name = string.IsNullOrEmpty(referenceName) ? "[未命名]" : referenceName;

            // 2. 如果没有分支，直接返回节点名
            if (branches == null || branches.Count == 0)
            {
                return name;
            }

            // 3. 拼接子节点名称
            // 这里使用 Linq 提取所有分支的目标节点名
            // 格式示例: "Root - (1, 2, 3)"
            List<string> targetNodes = branches
                .Select(b => b == null || string.IsNullOrEmpty(b.nextNodeRefName) ? "?" : $"{b.operation}->{b.nextNodeRefName}").ToList();

            return $"{name} - ({string.Join(", ", targetNodes)})";
        }
    }

    /// <summary>
    /// 连招分支的数据定义
    /// </summary>
    [Serializable]
    public class ComboBranchData
    {
        [Tooltip("触发此分支的输入操作，例如 'L', 'R', 'Attack'")] [HorizontalGroup("Branch", 100)] [LabelWidth(60)]
        public string operation;

        [Tooltip("此分支链接到的下一个节点")]
        [HorizontalGroup("Branch")]
        [LabelText("下一个节点")]
        public string nextNodeRefName; // <-- 使用名称引用，而不是索引
    }
}