using System;
using System.Collections.Generic;
using System.Linq;
using Autodesk.Navisworks.Api;
using NavisworksTransport.Core.Models;
using NavisworksTransport.Utils;

namespace NavisworksTransport.Core
{
    /// <summary>
    /// 路径分析引擎
    /// 负责计算路径的各项指标和评分
    /// </summary>
    public class PathAnalysisEngine
    {
        private readonly PathDatabase _database;
        private const double HOTSPOT_RADIUS = 3.0; // 热点半径：3米
        private const double ENDPOINT_THRESHOLD_METERS = 2.0; // 终点分组阈值：2米
        private const double IDEAL_SPEED = 1.0; // 理想速度：1.0 m/s
        
        /// <summary>
        /// 获取终点分组阈值（转换为模型单位用于距离比较）
        /// </summary>
        private double EndpointThreshold => NavisworksTransport.Utils.UnitsConverter.ConvertFromMeters(ENDPOINT_THRESHOLD_METERS);

        /// <summary>
        /// 构造函数
        /// </summary>
        public PathAnalysisEngine(PathDatabase database)
        {
            _database = database ?? throw new ArgumentNullException(nameof(database));
        }

        #region 公共方法

        /// <summary>
        /// 分析单条路径的所有指标
        /// </summary>
        public PathDetailedAnalysis AnalyzePath(PathRoute route, AnalysisContext context)
        {
            if (route == null)
                throw new ArgumentNullException(nameof(route));

            var analysis = new PathDetailedAnalysis
            {
                RouteId = route.Id,
                RouteName = route.Name,
                TotalLength = route.TotalLength,
                EstimatedTime = route.EstimatedTime,
                Strategy = context?.Strategy ?? AnalysisStrategies.Balanced,
                AnalysisTime = DateTime.Now
            };

            try
            {
                // 1. 获取碰撞数据
                var collisions = GetCollisionsForRoute(route.Id);
                analysis.CollisionCount = collisions?.Count ?? 0;

                // 2. 检测碰撞热点
                analysis.Hotspots = DetectHotspots(collisions, HOTSPOT_RADIUS);
                analysis.HotspotCount = analysis.Hotspots.Count;

                // 3. 计算各维度分数（四维度：安全、效率、转弯、直达）
                analysis.SafetyScore = CalculateSafetyScore(analysis.CollisionCount, analysis.HotspotCount);
                analysis.EfficiencyScore = CalculateEfficiencyScore(route, context?.GroupMinLength ?? route.TotalLength);
                analysis.TurnDifficultyScore = CalculateTurnDifficultyScore(route.Edges);
                analysis.TortuosityScore = CalculateTortuosityScore(route);
                analysis.RedundancyScore = 0; // 已移除，保留字段兼容

                // 4. 计算综合加权评分
                analysis.WeightedScore = CalculateWeightedScore(analysis, analysis.Strategy);

                LogManager.Info($"[路径分析] {route.Name}: 安全{analysis.SafetyScore:F0}, 效率{analysis.EfficiencyScore:F0}, " +
                    $"转弯{analysis.TurnDifficultyScore:F0}, 直达{analysis.TortuosityScore:F0}, 综合{analysis.WeightedScore:F0}");
            }
            catch (Exception ex)
            {
                LogManager.Error($"[路径分析] 分析路径 {route.Name} 失败: {ex.Message}", ex);
                // 设置默认值，避免崩溃
                SetDefaultScores(analysis);
            }

            return analysis;
        }

        /// <summary>
        /// 对多条路径进行分组（按终点）
        /// </summary>
        public List<EndpointGroup> GroupPathsByEndpoint(List<PathRoute> routes)
        {
            if (routes == null || routes.Count == 0)
                return new List<EndpointGroup>();

            var groups = new List<EndpointGroup>();

            foreach (var route in routes)
            {
                var endPoint = route.GetEndPoint()?.Position;
                if (endPoint == null)
                {
                    LogManager.Warning($"[路径分组] 路径 {route.Name} 没有终点，跳过");
                    continue;
                }

                // 查找是否已有匹配的组（以终点为主，2米阈值）
                var matchingGroup = groups.FirstOrDefault(g =>
                    Distance(g.EndPoint, endPoint) < EndpointThreshold);

                if (matchingGroup != null)
                {
                    // 添加到现有组
                    var analysis = AnalyzePath(route, new AnalysisContext { GroupMinTime = 0 });
                    matchingGroup.PathAnalyses.Add(analysis);
                    // 更新组中心点
                    matchingGroup.EndPoint = CalculateGroupCenter(matchingGroup.PathAnalyses, routes);
                    LogManager.Debug($"[路径分组] 路径 {route.Name} 加入现有组 {matchingGroup.GroupId}");
                }
                else
                {
                    // 创建新组
                    var newGroup = new EndpointGroup
                    {
                        GroupId = Guid.NewGuid().ToString("N").Substring(0, 8),
                        GroupName = $"终点组-{groups.Count + 1}",
                        EndPoint = endPoint,
                        EndPointDescription = route.GetEndPoint()?.Name ?? "未知终点"
                    };

                    var analysis = AnalyzePath(route, new AnalysisContext { GroupMinTime = 0 });
                    newGroup.PathAnalyses.Add(analysis);
                    groups.Add(newGroup);

                    LogManager.Info($"[路径分组] 创建新组 {newGroup.GroupId}，终点: {newGroup.EndPointDescription}");
                }
            }

            // 更新各组的组内统计数据
            foreach (var group in groups)
            {
                UpdateGroupStatistics(group);
            }

            LogManager.Info($"[路径分组] 完成，共 {groups.Count} 个组，{routes.Count} 条路径");
            return groups;
        }

        /// <summary>
        /// 分析多条路径并分组，包含完整的上下文计算
        /// </summary>
        public List<EndpointGroup> AnalyzeAndGroupPaths(List<PathRoute> routes, string strategy)
        {
            if (routes == null || routes.Count == 0)
                return new List<EndpointGroup>();

            // 第一步：初步分析所有路径（获取基础数据）
            var analyses = new List<PathDetailedAnalysis>();
            foreach (var route in routes)
            {
                var analysis = AnalyzePath(route, new AnalysisContext { Strategy = strategy });
                analyses.Add(analysis);
            }

            // 第二步：按终点分组
            var groups = new List<EndpointGroup>();
            var processed = new HashSet<string>();
            
            LogManager.Info($"[路径分组] 开始对 {analyses.Count} 条分析结果进行分组");

            foreach (var analysis in analyses)
            {
                if (processed.Contains(analysis.RouteId))
                {
                    LogManager.Debug($"[路径分组] 跳过已处理: {analysis.RouteId}");
                    continue;
                }

                var route = routes.FirstOrDefault(r => r.Id == analysis.RouteId);
                if (route == null)
                {
                    LogManager.Warning($"[路径分组] 找不到路径: {analysis.RouteId}");
                    continue;
                }

                var endPointObj = route.GetEndPoint();
                var endPoint = endPointObj?.Position;
                if (endPoint == null)
                {
                    LogManager.Warning($"[路径分组] 路径 {route.Name} 没有终点");
                    continue;
                }
                
                LogManager.Info($"[路径分组] 处理路径 {route.Name}, 终点: ({endPoint.X:F2}, {endPoint.Y:F2}, {endPoint.Z:F2})");

                // 找到同组的所有路径（包括当前路径）
                var groupAnalyses = new List<PathDetailedAnalysis>();
                // 首先添加当前路径
                groupAnalyses.Add(analysis);
                processed.Add(analysis.RouteId);
                
                foreach (var otherAnalysis in analyses)
                {
                    if (processed.Contains(otherAnalysis.RouteId))
                        continue;

                    var otherRoute = routes.FirstOrDefault(r => r.Id == otherAnalysis.RouteId);
                    if (otherRoute == null)
                        continue;

                    var otherEndPoint = otherRoute.GetEndPoint()?.Position;
                    if (otherEndPoint == null)
                        continue;

                    if (Distance(endPoint, otherEndPoint) < EndpointThreshold)
                    {
                        groupAnalyses.Add(otherAnalysis);
                        processed.Add(otherAnalysis.RouteId);
                    }
                }

                if (groupAnalyses.Count > 0)
                {
                    LogManager.Info($"[路径分组] 创建组，包含 {groupAnalyses.Count} 条路径");
                    
                    try
                    {
                        var group = new EndpointGroup
                        {
                            GroupId = Guid.NewGuid().ToString("N").Substring(0, 8),
                            EndPoint = CalculateGroupCenter(groupAnalyses, routes),
                            PathAnalyses = groupAnalyses
                        };
                        
                        // 设置组名称和终点描述
                        var firstRoute = routes.FirstOrDefault(r => r.Id == groupAnalyses.First().RouteId);
                        if (firstRoute != null)
                        {
                            var firstEndPoint = firstRoute.GetEndPoint();
                            group.GroupName = $"终点: {firstEndPoint?.Name ?? "未知"}";
                            group.EndPointDescription = $"坐标: ({group.EndPoint.X:F1}, {group.EndPoint.Y:F1}, {group.EndPoint.Z:F1})";
                        }
                        
                        groups.Add(group);
                        LogManager.Info($"[路径分组] 组创建成功: {group.GroupName}");
                    }
                    catch (Exception ex)
                    {
                        LogManager.Error($"[路径分组] 创建组失败: {ex.Message}", ex);
                    }
                }
                else
                {
                    LogManager.Warning($"[路径分组] 组内没有路径");
                }
            }

            // 第三步：更新效率分数（基于组内最短路径）和排名
            foreach (var group in groups)
            {
                UpdateGroupStatistics(group);

                // 只更新效率分数和综合评分，保留其他固有属性
                foreach (var analysis in group.PathAnalyses)
                {
                    var route = routes.FirstOrDefault(r => r.Id == analysis.RouteId);
                    if (route != null)
                    {
                        // 只重新计算效率（基于组内最短路径）
                        analysis.EfficiencyScore = CalculateEfficiencyScore(route, group.MinLength);
                        // 重新计算综合加权评分
                        analysis.WeightedScore = CalculateWeightedScore(analysis, strategy);
                    }
                    analysis.GroupId = group.GroupId;
                }

                // 排序并更新排名
                var sortedAnalyses = group.PathAnalyses
                    .OrderByDescending(a => a.WeightedScore)
                    .ToList();
                
                for (int i = 0; i < sortedAnalyses.Count; i++)
                {
                    sortedAnalyses[i].GroupRanking = i + 1;
                }
                
                group.PathAnalyses = sortedAnalyses;
            }

            return groups;
        }

        /// <summary>
        /// 检测碰撞热点
        /// </summary>
        public List<CollisionHotspot> DetectHotspots(List<CollisionResult> collisions, double radius = HOTSPOT_RADIUS)
        {
            var hotspots = new List<CollisionHotspot>();

            if (collisions == null || collisions.Count < 2)
                return hotspots;

            var processed = new HashSet<int>();

            for (int i = 0; i < collisions.Count; i++)
            {
                if (processed.Contains(i))
                    continue;

                var center = collisions[i].Center;
                if (center == null)
                    continue;

                var nearbyCollisions = new List<CollisionResult> { collisions[i] };

                // 查找范围内的其他碰撞
                for (int j = i + 1; j < collisions.Count; j++)
                {
                    if (processed.Contains(j))
                        continue;

                    var otherCenter = collisions[j].Center;
                    if (otherCenter == null)
                        continue;

                    if (Distance(center, otherCenter) <= radius)
                    {
                        nearbyCollisions.Add(collisions[j]);
                        processed.Add(j);
                    }
                }

                // 如果达到阈值（≥2次），创建热点
                if (nearbyCollisions.Count >= 2)
                {
                    var hotspot = new CollisionHotspot
                    {
                        Center = CalculateCenter(nearbyCollisions),
                        Radius = radius,
                        CollisionCount = nearbyCollisions.Count,
                        CollidedObjectNames = nearbyCollisions
                            .Select(c => GetSafeDisplayName(c.Item2))
                            .Distinct()
                            .ToList()
                    };
                    hotspots.Add(hotspot);
                }

                processed.Add(i);
            }

            LogManager.Debug($"[热点检测] 发现 {hotspots.Count} 个热点");
            return hotspots.OrderByDescending(h => h.CollisionCount).ToList();
        }

        /// <summary>
        /// 计算加权综合评分
        /// </summary>
        public double CalculateWeightedScore(PathDetailedAnalysis analysis, string strategy)
        {
            var weights = AnalysisStrategies.GetWeights(strategy);

            // 四维度加权计算：安全、效率、转弯、直达
            double weightedScore =
                analysis.SafetyScore * weights[0] +
                analysis.EfficiencyScore * weights[1] +
                analysis.TurnDifficultyScore * weights[2] +
                analysis.TortuosityScore * weights[3];

            return Math.Round(weightedScore, 1);
        }

        /// <summary>
        /// 查找组内最佳路径
        /// </summary>
        public PathDetailedAnalysis FindBestPathInGroup(EndpointGroup group, string strategy)
        {
            if (group?.PathAnalyses == null || group.PathAnalyses.Count == 0)
                return null;

            // 如果只有一条路径，直接返回
            if (group.PathAnalyses.Count == 1)
                return group.PathAnalyses[0];

            // 重新计算加权评分
            foreach (var analysis in group.PathAnalyses)
            {
                analysis.WeightedScore = CalculateWeightedScore(analysis, strategy);
            }

            // 按评分排序
            var sortedPaths = group.PathAnalyses.OrderByDescending(a => a.WeightedScore).ToList();

            // 如果前两名评分接近（差距<5分），优先选碰撞少的
            if (sortedPaths.Count >= 2)
            {
                var first = sortedPaths[0];
                var second = sortedPaths[1];

                if (Math.Abs(first.WeightedScore - second.WeightedScore) < 5)
                {
                    if (second.CollisionCount < first.CollisionCount)
                    {
                        LogManager.Info($"[最佳路径] 评分接近，选择碰撞更少的路径: {second.RouteName}");
                        return second;
                    }
                }
            }

            return sortedPaths[0];
        }

        /// <summary>
        /// 生成优化建议
        /// </summary>
        public List<CategorizedSuggestion> GenerateSuggestions(PathDetailedAnalysis analysis, EndpointGroup group)
        {
            var suggestions = new List<CategorizedSuggestion>();

            // 1. 安全建议
            if (analysis.CollisionCount > 0)
            {
                if (analysis.HotspotCount > 0)
                {
                    suggestions.Add(new CategorizedSuggestion
                    {
                        Category = SuggestionCategory.Safety,
                        Title = $"发现 {analysis.CollisionCount} 次碰撞（{analysis.HotspotCount} 个热点）",
                        Description = $"路径 {analysis.RouteName} 存在 {analysis.HotspotCount} 个碰撞热点区域，" +
                            $"建议重点检查热点位置并优化路径避让",
                        RelatedRouteId = analysis.RouteId,
                        RelatedRouteName = analysis.RouteName,
                        Priority = analysis.HotspotCount >= 2 ? 5 : 4
                    });
                }
                else
                {
                    suggestions.Add(new CategorizedSuggestion
                    {
                        Category = SuggestionCategory.Safety,
                        Title = $"发现 {analysis.CollisionCount} 次分散碰撞",
                        Description = $"路径 {analysis.RouteName} 有 {analysis.CollisionCount} 次碰撞，" +
                            $"建议优化路径避让",
                        RelatedRouteId = analysis.RouteId,
                        RelatedRouteName = analysis.RouteName,
                        Priority = 3
                    });
                }
            }
            else
            {
                suggestions.Add(new CategorizedSuggestion
                {
                    Category = SuggestionCategory.Safety,
                    Title = "无碰撞，安全性良好",
                    Description = $"路径 {analysis.RouteName} 未检测到碰撞",
                    RelatedRouteId = analysis.RouteId,
                    RelatedRouteName = analysis.RouteName,
                    Priority = 1
                });
            }

            // 2. 组内对比建议
            if (group?.PathAnalyses?.Count > 1)
            {
                var lengthDiff = group.GetLengthDiffPercent(analysis.RouteId);
                var timeDiff = group.GetTimeDiffPercent(analysis.RouteId);

                if (lengthDiff > 30)
                {
                    suggestions.Add(new CategorizedSuggestion
                    {
                        Category = SuggestionCategory.Efficiency,
                        Title = $"路径偏长（+{lengthDiff:F1}%）",
                        Description = $"该路径比组内最短路径长 {lengthDiff:F1}%，" +
                            $"建议考虑更短路线",
                        RelatedRouteId = analysis.RouteId,
                        RelatedRouteName = analysis.RouteName,
                        Priority = 3
                    });
                }

                // 推荐最佳路径
                if (analysis.IsBestInGroup)
                {
                    suggestions.Add(new CategorizedSuggestion
                    {
                        Category = SuggestionCategory.GroupComparison,
                        Title = $"🏆 本组最佳路径推荐",
                        Description = $"路径 {analysis.RouteName} 是到达『{group.EndPointDescription}』的最佳选择，" +
                            $"综合评分 {analysis.WeightedScore:F1} 分",
                        RelatedRouteId = analysis.RouteId,
                        RelatedRouteName = analysis.RouteName,
                        Priority = 5
                    });
                }
            }

            // 3. 转弯建议
            if (analysis.TurnDifficultyScore < 60)
            {
                suggestions.Add(new CategorizedSuggestion
                {
                    Category = SuggestionCategory.TurnComplexity,
                    Title = "转弯难度较高",
                    Description = $"路径 {analysis.RouteName} 转弯难度分数较低，" +
                        $"建议检查急转弯位置",
                    RelatedRouteId = analysis.RouteId,
                    RelatedRouteName = analysis.RouteName,
                    Priority = 3
                });
            }

            return suggestions.OrderByDescending(s => s.Priority).ToList();
        }

        #endregion

        #region 私有计算方法

        /// <summary>
        /// 计算安全性分数
        /// </summary>
        private double CalculateSafetyScore(int collisionCount, int hotspotCount)
        {
            // 简单扣分制：每个碰撞扣1分，每个热点扣1分
            double penalty = collisionCount * 1.0 + hotspotCount * 1.0;
            return Math.Max(0, 100 - penalty);
        }

        /// <summary>
        /// 计算效率分数 - 基于路径长度（越短越高效）
        /// </summary>
        public double CalculateEfficiencyScore(PathRoute route, double groupMinLength)
        {
            // 如果没有组内最短路径作为参考，使用当前路径长度
            double referenceLength = groupMinLength > 0 ? groupMinLength : route.TotalLength;
            
            if (referenceLength <= 0)
                return 50; // 默认中等分数

            // 计算与最短路径的差异率
            double lengthDiffPercent = (route.TotalLength - referenceLength) / referenceLength;
            
            // 长度效率分：相同为100分，每多10%扣10分
            double efficiencyScore = Math.Max(0, 100 - lengthDiffPercent * 100);
            
            return Math.Round(Math.Min(100, efficiencyScore), 1);
        }

        /// <summary>
        /// 计算转弯难度分数
        /// </summary>
        private double CalculateTurnDifficultyScore(List<PathEdge> edges)
        {
            if (edges == null || edges.Count == 0)
                return 100; // 无转弯，满分

            // 简单扣分制：每个圆弧转弯扣1分
            int arcEdgeCount = edges.Count(e => e.SegmentType == PathSegmentType.Arc);
            return Math.Max(0, 100 - arcEdgeCount * 1.0);
        }

        /// <summary>
        /// 计算路径曲折度分数
        /// </summary>
        private double CalculateTortuosityScore(PathRoute route)
        {
            var sortedPoints = route.GetSortedPoints();
            if (sortedPoints.Count < 2)
                return 100;

            var startPoint = sortedPoints.First().Position;
            var endPoint = sortedPoints.Last().Position;

            // 计算直线距离（模型单位）
            double straightDistanceModelUnits = Distance(startPoint, endPoint);
            // 转换为米（与 TotalLength 单位一致）
            double straightDistanceMeters = NavisworksTransport.Utils.UnitsConverter.ConvertToMeters(straightDistanceModelUnits);

            if (straightDistanceMeters <= 0)
                return 100;

            // 直达性 = 直线距离 / 实际路径长度 × 100（越接近100越好）
            // 实际路径长度由 TotalLength 计算属性提供（已转换为米）
            if (route.TotalLength <= 0.001)
                return 100;
            
            double directness = straightDistanceMeters / route.TotalLength * 100;
            double score = Math.Min(100, Math.Max(0, Math.Round(directness, 1)));
            
            LogManager.Info($"[直达性计算] {route.Name}: 直线距离={straightDistanceMeters:F2}m, 实际长度={route.TotalLength:F2}m, 直达性={score:F1}");
            
            return score;
        }

        /// <summary>
        /// 计算冗余度分数
        /// </summary>
        private double CalculateRedundancyScore(PathRoute route, List<ChannelInfo> channels)
        {
            // 简单扣分制：基于通道窄宽缩减量扣分
            // 每缩减10%扣1分
            
            // 如果路径没有物体参数，使用配置默认值（转换为模型单位）
            double objectWidth = route.MaxObjectWidth > 0 ? route.MaxObjectWidth 
                : NavisworksTransport.Utils.UnitsConverter.ConvertFromMeters(1.0); // 默认1米
            double safetyMargin = route.SafetyMargin > 0 ? route.SafetyMargin 
                : NavisworksTransport.Utils.UnitsConverter.ConvertFromMeters(0.1); // 默认0.1米
            double effectiveObjectWidth = objectWidth + safetyMargin * 2;
            
            double channelWidth;
            if (channels == null || channels.Count == 0)
            {
                // 使用配置中的宽度限制（模型单位）
                var config = NavisworksTransport.Core.Config.ConfigManager.Instance.Current.Logistics;
                channelWidth = config.WidthLimit > 0 ? config.WidthLimit 
                    : NavisworksTransport.Utils.UnitsConverter.ConvertFromMeters(3.0); // 默认3米
            }
            else
            {
                // ChannelInfo.WidthLimit 应该是模型单位
                channelWidth = channels.Min(c => c.WidthLimit);
            }
            
            // 计算宽度缩减率（正值表示有冗余，负值表示不足）
            double widthMargin = (channelWidth - effectiveObjectWidth) / effectiveObjectWidth;
            
            // 每缩减10%扣1分（反向计算：越宽越高分）
            double score = 100 - widthMargin * 100 * 0.1;
            return Math.Min(100, Math.Max(0, score));
        }

        #endregion

        #region 辅助方法

        /// <summary>
        /// 获取路径的碰撞数据
        /// </summary>
        private List<CollisionResult> GetCollisionsForRoute(string routeId)
        {
            try
            {
                // 获取最新的碰撞检测记录
                var clashResult = _database.GetLatestDetectionResultByRouteId(routeId);
                if (clashResult == null)
                    return new List<CollisionResult>();

                // 获取碰撞对象
                var collisionObjects = _database.GetClashDetectiveCollisionObjects(clashResult.Id);

                // 转换为CollisionResult列表
                var collisions = new List<CollisionResult>();
                foreach (var obj in collisionObjects)
                {
                    if (obj.AnimatedObjectTrackedPosX.HasValue && obj.AnimatedObjectTrackedPosY.HasValue && obj.AnimatedObjectTrackedPosZ.HasValue)
                    {
                        collisions.Add(new CollisionResult
                        {
                            Center = new Point3D(
                            obj.AnimatedObjectTrackedPosX.Value,
                            obj.AnimatedObjectTrackedPosY.Value,
                            obj.AnimatedObjectTrackedPosZ.Value),
                            Item2 = ModelItemProxyHelper.CreateProxy(obj.DisplayName)
                        });
                    }
                }

                return collisions;
            }
            catch (Exception ex)
            {
                LogManager.Error($"[获取碰撞数据] 路径 {routeId} 失败: {ex.Message}");
                return new List<CollisionResult>();
            }
        }

        /// <summary>
        /// 计算两点距离
        /// </summary>
        private double Distance(Point3D p1, Point3D p2)
        {
            if (p1 == null || p2 == null)
                return double.MaxValue;

            double dx = p1.X - p2.X;
            double dy = p1.Y - p2.Y;
            double dz = p1.Z - p2.Z;

            return Math.Sqrt(dx * dx + dy * dy + dz * dz);
        }

        /// <summary>
        /// 计算碰撞中心点
        /// </summary>
        private Point3D CalculateCenter(List<CollisionResult> collisions)
        {
            if (collisions == null || collisions.Count == 0)
                return new Point3D(0, 0, 0);

            double sumX = 0, sumY = 0, sumZ = 0;
            int count = 0;

            foreach (var collision in collisions)
            {
                if (collision.Center != null)
                {
                    sumX += collision.Center.X;
                    sumY += collision.Center.Y;
                    sumZ += collision.Center.Z;
                    count++;
                }
            }

            if (count == 0)
                return new Point3D(0, 0, 0);

            return new Point3D(sumX / count, sumY / count, sumZ / count);
        }

        /// <summary>
        /// 计算组中心点（取所有路径终点的平均值）
        /// </summary>
        private Point3D CalculateGroupCenter(List<PathDetailedAnalysis> analyses, List<PathRoute> routes)
        {
            if (analyses == null || analyses.Count == 0 || routes == null)
                return new Point3D(0, 0, 0);
            
            double sumX = 0, sumY = 0, sumZ = 0;
            int count = 0;
            
            foreach (var analysis in analyses)
            {
                var route = routes.FirstOrDefault(r => r.Id == analysis.RouteId);
                var endPoint = route?.GetEndPoint()?.Position;
                if (endPoint != null)
                {
                    sumX += endPoint.X;
                    sumY += endPoint.Y;
                    sumZ += endPoint.Z;
                    count++;
                }
            }
            
            if (count == 0)
                return new Point3D(0, 0, 0);
            
            return new Point3D(sumX / count, sumY / count, sumZ / count);
        }

        /// <summary>
        /// 更新组内统计信息
        /// </summary>
        private void UpdateGroupStatistics(EndpointGroup group)
        {
            if (group?.PathAnalyses == null || group.PathAnalyses.Count == 0)
                return;

            // 更新排名
            var sorted = group.PathAnalyses.OrderByDescending(a => a.WeightedScore).ToList();
            for (int i = 0; i < sorted.Count; i++)
            {
                sorted[i].GroupRanking = i + 1;
            }

            LogManager.Debug($"[组统计] 组 {group.GroupId} 共 {group.RouteCount} 条路径，" +
                $"最佳: {group.BestPath?.RouteName}");
        }

        /// <summary>
        /// 设置默认分数（错误恢复）
        /// </summary>
        private void SetDefaultScores(PathDetailedAnalysis analysis)
        {
            analysis.SafetyScore = 50;
            analysis.EfficiencyScore = 50;
            analysis.TurnDifficultyScore = 50;
            analysis.TortuosityScore = 50;
            analysis.RedundancyScore = 50;
            analysis.WeightedScore = 50;
        }

        /// <summary>
        /// 获取安全的显示名称
        /// </summary>
        private string GetSafeDisplayName(ModelItem item)
        {
            if (item == null)
                return "未知对象";

            try
            {
                return item.DisplayName ?? "未命名对象";
            }
            catch
            {
                return "未知对象";
            }
        }

        #endregion
    }

    /// <summary>
    /// ModelItem代理类（用于当没有实际ModelItem时）
    /// </summary>
    internal static class ModelItemProxyHelper
    {
        public static ModelItem CreateProxy(string displayName)
        {
            // 这是一个简化实现，实际可能需要更复杂的处理
            // 这里仅用于存储显示名称
            return null;
        }
    }
}