添加功能

Repository/TransactionRecordRepository.cs

@@ -149,6 +149,23 @@ public interface ITransactionRecordRepository : IBaseRepository<TransactionRecor
     /// <param name="completeSql">完整的SELECT SQL语句</param>
     /// <returns>动态查询结果列表</returns>
     Task<List<dynamic>> ExecuteDynamicSqlAsync(string completeSql);
+
+    /// <summary>
+    /// 根据关键词查询已分类的账单（用于智能分类参考）
+    /// </summary>
+    /// <param name="keywords">关键词列表</param>
+    /// <param name="limit">返回结果数量限制</param>
+    /// <returns>已分类的账单列表</returns>
+    Task<List<TransactionRecord>> GetClassifiedByKeywordsAsync(List<string> keywords, int limit = 10);
+
+    /// <summary>
+    /// 根据关键词查询已分类的账单，并计算相关度分数
+    /// </summary>
+    /// <param name="keywords">关键词列表</param>
+    /// <param name="minMatchRate">最小匹配率（0.0-1.0），默认0.3表示至少匹配30%的关键词</param>
+    /// <param name="limit">返回结果数量限制</param>
+    /// <returns>带相关度分数的已分类账单列表</returns>
+    Task<List<(TransactionRecord record, double relevanceScore)>> GetClassifiedByKeywordsWithScoreAsync(List<string> keywords, double minMatchRate = 0.3, int limit = 10);
 }
 
 public class TransactionRecordRepository(IFreeSql freeSql) : BaseRepository<TransactionRecord>(freeSql), ITransactionRecordRepository
@@ -344,7 +361,7 @@ public class TransactionRecordRepository(IFreeSql freeSql) : BaseRepository<Tran
 
     public async Task<(List<ReasonGroupDto> list, int total)> GetReasonGroupsAsync(int pageIndex = 1, int pageSize = 20)
     {
-        // 先按照Reason分组，统计每个Reason的数量
+        // 先按照Reason分组，统计每个Reason的数量和总金额
         var groups = await FreeSql.Select<TransactionRecord>()
             .Where(t => !string.IsNullOrEmpty(t.Reason))
             .Where(t => string.IsNullOrEmpty(t.Classify)) // 只统计未分类的
@@ -352,11 +369,12 @@ public class TransactionRecordRepository(IFreeSql freeSql) : BaseRepository<Tran
             .ToListAsync(g => new
             {
                 Reason = g.Key,
-                Count = g.Count()
+                Count = g.Count(),
+                TotalAmount = g.Sum(g.Value.Amount)
             });
 
-        // 按数量降序排序
-        var sortedGroups = groups.OrderByDescending(g => g.Count).ToList();
+        // 按总金额绝对值降序排序
+        var sortedGroups = groups.OrderByDescending(g => Math.Abs(g.TotalAmount)).ToList();
         var total = sortedGroups.Count;
 
         // 分页
@@ -365,22 +383,27 @@ public class TransactionRecordRepository(IFreeSql freeSql) : BaseRepository<Tran
             .Take(pageSize)
             .ToList();
 
-        // 为每个分组获取示例记录
+        // 为每个分组获取详细信息
         var result = new List<ReasonGroupDto>();
         foreach (var group in pagedGroups)
         {
-            var sample = await FreeSql.Select<TransactionRecord>()
+            // 获取该分组的所有记录
+            var records = await FreeSql.Select<TransactionRecord>()
                 .Where(t => t.Reason == group.Reason)
-                .FirstAsync();
+                .Where(t => string.IsNullOrEmpty(t.Classify))
+                .ToListAsync();
 
-            if (sample != null)
+            if (records.Count > 0)
             {
+                var sample = records.First();
                 result.Add(new ReasonGroupDto
                 {
                     Reason = group.Reason,
                     Count = (int)group.Count,
                     SampleType = sample.Type,
-                    SampleClassify = sample.Classify ?? string.Empty
+                    SampleClassify = sample.Classify ?? string.Empty,
+                    TransactionIds = records.Select(r => r.Id).ToList(),
+                    TotalAmount = Math.Abs(group.TotalAmount)
                 });
             }
         }
@@ -542,6 +565,68 @@ public class TransactionRecordRepository(IFreeSql freeSql) : BaseRepository<Tran
 
         return trends;
     }
+
+    public async Task<List<TransactionRecord>> GetClassifiedByKeywordsAsync(List<string> keywords, int limit = 10)
+    {
+        if (keywords == null || keywords.Count == 0)
+        {
+            return new List<TransactionRecord>();
+        }
+
+        var query = FreeSql.Select<TransactionRecord>()
+            .Where(t => t.Classify != ""); // 只查询已分类的账单
+
+        // 构建OR条件：Reason包含任意一个关键词
+        if (keywords.Count > 0)
+        {
+            query = query.Where(t => keywords.Any(keyword => t.Reason.Contains(keyword)));
+        }
+
+        return await query
+            .OrderByDescending(t => t.OccurredAt)
+            .Limit(limit)
+            .ToListAsync();
+    }
+
+    public async Task<List<(TransactionRecord record, double relevanceScore)>> GetClassifiedByKeywordsWithScoreAsync(List<string> keywords, double minMatchRate = 0.3, int limit = 10)
+    {
+        if (keywords == null || keywords.Count == 0)
+        {
+            return new List<(TransactionRecord, double)>();
+        }
+
+        // 查询所有已分类且包含任意关键词的账单
+        var candidates = await FreeSql.Select<TransactionRecord>()
+            .Where(t => t.Classify != "")
+            .Where(t => keywords.Any(keyword => t.Reason.Contains(keyword)))
+            .ToListAsync();
+
+        // 计算每个候选账单的相关度分数
+        var scoredResults = candidates
+            .Select(record => 
+            {
+                var matchedCount = keywords.Count(keyword => record.Reason.Contains(keyword, StringComparison.OrdinalIgnoreCase));
+                var matchRate = (double)matchedCount / keywords.Count;
+                
+                // 额外加分：完全匹配整个摘要（相似度更高）
+                var exactMatchBonus = keywords.Any(k => record.Reason.Equals(k, StringComparison.OrdinalIgnoreCase)) ? 0.2 : 0.0;
+                
+                // 长度相似度加分：长度越接近，相关度越高
+                var avgKeywordLength = keywords.Average(k => k.Length);
+                var lengthSimilarity = 1.0 - Math.Min(1.0, Math.Abs(record.Reason.Length - avgKeywordLength) / Math.Max(record.Reason.Length, avgKeywordLength));
+                var lengthBonus = lengthSimilarity * 0.1;
+                
+                var score = matchRate + exactMatchBonus + lengthBonus;
+                return (record, score);
+            })
+            .Where(x => x.score >= minMatchRate) // 过滤低相关度结果
+            .OrderByDescending(x => x.score) // 按相关度降序
+            .ThenByDescending(x => x.record.OccurredAt) // 相同分数时，按时间降序
+            .Take(limit)
+            .ToList();
+
+        return scoredResults;
+    }
 }
 
 /// <summary>
@@ -568,6 +653,16 @@ public class ReasonGroupDto
     /// 示例分类（该分组中第一条记录的分类）
     /// </summary>
     public string SampleClassify { get; set; } = string.Empty;
+
+    /// <summary>
+    /// 该分组的所有账单ID列表
+    /// </summary>
+    public List<long> TransactionIds { get; set; } = new();
+
+    /// <summary>
+    /// 该分组的总金额（绝对值）
+    /// </summary>
+    public decimal TotalAmount { get; set; }
 }
 
 /// <summary>