using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using TeamAAS.Communication;

namespace TeamAAS.FlowEditor.Execution
{
    /// <summary>
    /// 执行结果注册中心 - 存储各节点最新执行结果，支持 &{节点名.属性名} 公式解析
    /// 内部结构: Dictionary<GraphId, Dictionary<NodeName, Dictionary<PropName, object>>>
    /// 保留键 "Gloab" 用于存储全局变量
    ///
    /// 实例化设计：主页面运行流程与产品管理编辑/调试流程使用各自独立的注册表实例，
    /// 避免 Debug 流程的清理/写入干扰运行中流程的结果缓存（导致内存释放异常）。
    /// - <see cref="Main"/>：主页面的运行流程（FlowRunner）专用
    /// - <see cref="Debug"/>：产品管理编辑/调试流程专用
    /// 产品管理进入监控模式时挂接的是主页面运行态流程，其 Graph.Registry 指向 Main，
    /// 因此公式解析/结果读取会自动落到主面对象上。
    /// </summary>
    public class ResultRegistry
    {
        /// <summary>主页面运行流程专用注册表</summary>
        public static ResultRegistry Main { get; } = new ResultRegistry();

        /// <summary>产品管理编辑/调试流程专用注册表</summary>
        public static ResultRegistry Debug { get; } = new ResultRegistry();

        public const string GlobalVariablesKey = "Gloab";

        public readonly Dictionary<string, Dictionary<string, Dictionary<string, object>>> _store
            = new Dictionary<string, Dictionary<string, Dictionary<string, object>>>();
        private readonly object _lock = new object();
        private bool _initialized;

        /// <summary>
        /// 初始化所有注册表实例：订阅全局变量变化事件，自动刷新 ResultRegistry
        /// </summary>
        public static void Initialize()
        {
            Main.InitializeInstance();
            Debug.InitializeInstance();
        }

        /// <summary>
        /// 刷新所有注册表实例的全局变量区（全局变量为进程级共享数据）
        /// </summary>
        public static void RefreshGlobals()
        {
            Main.RefreshGlobalVariables();
            Debug.RefreshGlobalVariables();
        }

        /// <summary>
        /// 初始化：订阅全局变量变化事件，自动刷新本注册表
        /// </summary>
        public void InitializeInstance()
        {
            if (_initialized) return;
            _initialized = true;
            GlobalVariableManager.Instance.VariablesChanged += RefreshGlobalVariables;
            RefreshGlobalVariables();
        }


        /// <summary>
        /// 设置节点最新执行结果
        /// </summary>
        public void SetResult(string graphId, string nodeid, string nodeName, Dictionary<string, object> results)
        {
            if (string.IsNullOrEmpty(graphId) || string.IsNullOrEmpty(nodeName)) return;
            lock (_lock)
            {
                if (!_store.TryGetValue(graphId, out var flowDict))
                {
                    flowDict = new Dictionary<string, Dictionary<string, object>>();
                    _store[graphId] = flowDict;
                }
                flowDict[nodeName] = results ?? new Dictionary<string, object>();
            }
        }

        /// <summary>
        /// 向指定流程的「输入」虚拟节点写入单个变量（供 &amp;{输入.变量名} 2段式解析）
        /// </summary>
        public void SetInputVariable(string graphId, string varName, object value)
        {
            if (string.IsNullOrEmpty(graphId) || string.IsNullOrEmpty(varName)) return;
            lock (_lock)
            {
                if (!_store.TryGetValue(graphId, out var flowDict))
                {
                    flowDict = new Dictionary<string, Dictionary<string, object>>();
                    _store[graphId] = flowDict;
                }
                if (!flowDict.TryGetValue("输入", out var inputDict))
                {
                    inputDict = new Dictionary<string, object>();
                    flowDict["输入"] = inputDict;
                }
                inputDict[varName] = value;
            }
        }

        /// <summary>
        /// 获取指定流程下所有节点的结果
        /// </summary>
        public void GetFlowResults(string graphId, out Dictionary<string, Dictionary<string, object>> flowResults)
        {
            flowResults = new Dictionary<string, Dictionary<string, object>>();
            if (string.IsNullOrEmpty(graphId)) return;
            lock (_lock)
            {
                if (_store.TryGetValue(graphId, out var dict))
                {
                    foreach (var kvp in dict)
                        flowResults[kvp.Key] = kvp.Value;
                }
            }
        }

        /// <summary>
        /// 获取节点最新结果字典
        /// </summary>
        public Dictionary<string, object> GetResult(string graphId, string nodeName)
        {
            lock (_lock)
            {
                if (_store.TryGetValue(graphId, out var flowDict) && flowDict.TryGetValue(nodeName, out var dict))
                    return dict;
            }
            return null;
        }

        /// <summary>
        /// 获取节点某个属性值
        /// </summary>
        public object GetValue(string graphId, string nodeName, string propertyName)
        {
            lock (_lock)
            {
                if (_store.TryGetValue(graphId, out var flowDict)
                    && flowDict.TryGetValue(nodeName, out var dict)
                    && dict.TryGetValue(propertyName, out var val))
                    return val;
            }
            return null;
        }

        /// <summary>
        /// 刷新全局变量到 _store["Gloab"]
        /// </summary>
        public void RefreshGlobalVariables()
        {
            var vars = GlobalVariableManager.Instance.Variables;
            lock (_lock)
            {
                if (!_store.TryGetValue(GlobalVariablesKey, out var gloabDict))
                {
                    gloabDict = new Dictionary<string, Dictionary<string, object>>();
                    _store[GlobalVariablesKey] = gloabDict;
                }

                gloabDict.Clear();
                foreach (var v in vars)
                {
                    if (string.IsNullOrWhiteSpace(v.Name)) continue;
                    gloabDict[v.Name] = new Dictionary<string, object>
                    {
                        ["Value"] = v.Value,
                        ["DataType"] = v.DataType,
                        ["Note"] = v.Note ?? ""
                    };
                }
            }
        }

        /// <summary>
        /// 解析公式 &{节点名.属性名}（2段式）或 &{流程名.节点名.属性名}（3段式）
        /// 特殊支持 &{Gloab.变量名} 直接获取全局变量值（2段式），或 &{Gloab.变量名.Value}（3段式）
        /// </summary>
        public object ResolveFormula(string FlowId, string formula)
        {
            if (string.IsNullOrEmpty(formula)) return formula;

            var match2 = Regex.Match(formula, @"^&\{(?<node>[^.}]+)\.(?<prop>[^.}]+)\}$");
            var match3 = Regex.Match(formula, @"^&\{(?<flow>[^.}]+)\.(?<node>[^.}]+)\.(?<prop>[^.}]+)\}$");
            if (match2.Success)
            {
                string first = match2.Groups["node"].Value;
                string second = match2.Groups["prop"].Value;
                if (first == GlobalVariablesKey)
                {
                    return GetValue(GlobalVariablesKey, second, "Value");
                }
                var result = GetValue(FlowId, first, second);
                return result;
            }
            else if (match3.Success)
            {
                string flow = match3.Groups["flow"].Value;
                string node = match3.Groups["node"].Value;
                string prop = match3.Groups["prop"].Value;
                if (flow == GlobalVariablesKey)
                {
                    return GetValue(GlobalVariablesKey, node, prop);
                }
                return GetValue(flow, node, prop);
            }
            else
                return formula;
        }

        /// <summary>
        /// 删除指定流程中某个节点的执行结果
        /// </summary>
        public void RemoveNodeResult(string graphId, string nodeName)
        {
            if (string.IsNullOrEmpty(graphId) || string.IsNullOrEmpty(nodeName)) return;
            lock (_lock)
            {
                if (_store.TryGetValue(graphId, out var flowDict))
                    flowDict.Remove(nodeName);
            }
        }

        /// <summary>
        /// 清空指定流程的所有结果
        /// </summary>
        public void ClearFlow(string graphId)
        {
            if (string.IsNullOrEmpty(graphId)) return;
            lock (_lock)
            {
                _store.Remove(graphId);
            }
        }

        /// <summary>
        /// 完全释放所有流程数据（各流程 GraphId 及其子流程 SubGraphId 条目全部移除），仅保留全局变量区。
        /// ClearFlow 只按单个 GraphId 清理，会漏掉组合/循环子流程写入的 SubGraphId 条目；
        /// 切换/重载产品、进出监控时用本方法彻底清干净，避免上次产品的数据残留堆积。
        /// </summary>
        public void ClearAllFlows()
        {
            lock (_lock)
            {
                var flowKeys = _store.Keys.Where(k => k != GlobalVariablesKey).ToList();
                foreach (var key in flowKeys)
                    _store.Remove(key);
            }
        }

        /// <summary>
        /// 清空所有结果
        /// </summary>
        public void Clear()
        {
            lock (_lock)
            {
                _store.Clear();
            }
        }

        #region 调试监控（供主页“注册表监控”窗口的 PropertyGrid 直接绑定 Main / Debug 显示）

        /// <summary>【监控】当前缓存的流程数（不含全局变量区）。若 Debug 持续增长而不回落，通常意味着清理没做好。</summary>
        [Category("注册表监控")]
        [DisplayName("流程数")]
        [ReadOnly(true)]
        public int FlowCount
        {
            get { lock (_lock) return _store.Keys.Count(k => k != GlobalVariablesKey); }
        }

        /// <summary>【监控】缓存的流程 GraphId 列表（逗号分隔）。</summary>
        [Category("注册表监控")]
        [DisplayName("流程ID列表")]
        [ReadOnly(true)]
        public string FlowIds
        {
            get { lock (_lock) return string.Join(", ", _store.Keys.Where(k => k != GlobalVariablesKey)); }
        }

        /// <summary>【监控】全局变量条目数。</summary>
        [Category("注册表监控")]
        [DisplayName("全局变量数")]
        [ReadOnly(true)]
        public int GlobalVariableCount
        {
            get { lock (_lock) return _store.TryGetValue(GlobalVariablesKey, out var g) ? g.Count : 0; }
        }

        /// <summary>【监控】是否已初始化（已订阅全局变量变化事件）。</summary>
        [Category("注册表监控")]
        [DisplayName("已初始化")]
        [ReadOnly(true)]
        public bool IsInitialized
        {
            get { lock (_lock) return _initialized; }
        }

        /// <summary>
        /// 【监控】完整内容快照（多行文本）：流程 → 节点 → 结果键值，用于排查 Main / Debug 是否被正确管理。
        /// 大对象（图像 / CogRecord 等）只显示类型名，避免 ToString 噪音。
        /// </summary>
        [Category("注册表监控")]
        [DisplayName("内容快照")]
        [ReadOnly(true)]
        public string Snapshot
        {
            get
            {
                lock (_lock)
                {
                    var sb = new StringBuilder();
                    foreach (var flow in _store)
                    {
                        if (flow.Key == GlobalVariablesKey)
                        {
                            sb.AppendLine($"[全局变量 Gloab] {flow.Value.Count} 项");
                            foreach (var v in flow.Value)
                            {
                                object gv = v.Value != null && v.Value.TryGetValue("Value", out var raw) ? raw : null;
                                sb.AppendLine($"    {v.Key} = {DescribeValue(gv)}");
                            }
                            continue;
                        }

                        sb.AppendLine($"[流程 {flow.Key}] 节点 {flow.Value.Count} 个");
                        foreach (var node in flow.Value)
                        {
                            sb.AppendLine($"    · {node.Key}（{node.Value.Count} 项）");
                            foreach (var kv in node.Value)
                                sb.AppendLine($"        {kv.Key} = {DescribeValue(kv.Value)}");
                        }
                    }
                    return sb.Length == 0 ? "（空）" : sb.ToString();
                }
            }
        }

        /// <summary>监控快照的值格式化：基础类型直接 ToString，集合显示项数，其余大对象只显示类型名。</summary>
        private static string DescribeValue(object v)
        {
            if (v == null) return "null";
            var t = v.GetType();
            bool basic = t.IsPrimitive || v is string || v is decimal || v is DateTime || t.IsEnum;
            if (basic) return v.ToString();
            if (v is System.Collections.IEnumerable en)
            {
                int c = 0;
                foreach (var _ in en) c++;
                return $"{t.Name}（{c} 项）";
            }
            return t.Name;
        }

        #endregion
    }
}