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CloudBuilder.AI/Policy/ChineseTtsVoicePolicy.cs

@@ -168,45 +168,99 @@ namespace CloudBuilder.AI.Policy
         ChineseTtsVoice.Theresa
     };
 
-        // 1. 随机取任意一个
-        public static ChineseTtsVoice GetRandom()
+
+        /// <summary>
+        /// 百分比越大，取前面5个的机会越大
+        /// </summary>
+        /// <param name="percentage">0~100，推荐 50~100</param>
+        /// <summary>
+        /// 百分比越大，取前面5个的机会越大
+        /// </summary>
+        /// <param name="percentage">0~100，越大越容易选前5个</param>
+        public static ChineseTtsVoice GetRandom(int percentage = 80)
         {
             var all = Enum.GetValues(typeof(ChineseTtsVoice)).Cast<ChineseTtsVoice>().ToList();
-            return all[_random.Next(all.Count)];
+            int totalCount = all.Count;
+
+            // 安全限制
+            percentage = Math.Clamp(percentage, 0, 100);
+            if (totalCount == 0) return default;
+
+            // 前5个
+            int topCount = 5;
+            var topItems = all.Take(topCount).ToList();
+
+            // 百分比越高，前5个被选中的概率越高
+            double topChance = percentage / 100.0;
+
+            // 随机决定是否从前5个拿
+            if (_random.NextDouble() < topChance && topItems.Any())
+            {
+                return topItems[_random.Next(topItems.Count)];
+            }
+            else
+            {
+                // 否则全量随机
+                return all[_random.Next(all.Count)];
+            }
         }
 
-        // 2. 随机女性
-        public static ChineseTtsVoice GetRandomFemale()
+        // 2. 随机女性 + 百分比权重（越高越容易选前5个）
+        public static ChineseTtsVoice GetRandomFemale(int weightPercentage = 80)
         {
-            return _allFemales[_random.Next(_allFemales.Count)];
+            return GetWeightedRandom(_allFemales, weightPercentage);
         }
 
-        // 3. 随机男性
-        public static ChineseTtsVoice GetRandomMale()
+        // 3. 随机男性 + 百分比权重
+        public static ChineseTtsVoice GetRandomMale(int weightPercentage = 80)
         {
-            return _allMales[_random.Next(_allMales.Count)];
+            return GetWeightedRandom(_allMales, weightPercentage);
         }
 
-        // 4. 随机男性（传入要排除的声音，通用版 ✅）
-        public static ChineseTtsVoice GetRandomMaleExclude(ChineseTtsVoice excludeVoice = ChineseTtsVoice.Sherpa4)
+        // 4. 随机男性（排除指定）+ 百分比权重
+        public static ChineseTtsVoice GetRandomMaleExclude(int weightPercentage = 80, ChineseTtsVoice excludeVoice = ChineseTtsVoice.Sherpa4)
         {
             var filtered = _allMales.Where(m => m != excludeVoice).ToList();
-            return filtered[_random.Next(filtered.Count)];
+            return GetWeightedRandom(filtered, weightPercentage);
         }
 
-        // 5. 随机女性（传入要排除的声音，通用版 ✅）
-        public static ChineseTtsVoice GetRandomFemaleExclude(ChineseTtsVoice excludeVoice = ChineseTtsVoice.Sherpa0)
+        // 5. 随机女性（排除指定）+ 百分比权重
+        public static ChineseTtsVoice GetRandomFemaleExclude(int weightPercentage = 80, ChineseTtsVoice excludeVoice = ChineseTtsVoice.Sherpa0)
         {
             var filtered = _allFemales.Where(f => f != excludeVoice).ToList();
-            return filtered[_random.Next(filtered.Count)];
+            return GetWeightedRandom(filtered, weightPercentage);
         }
 
-        // 1. 随机取任意一个
-        public static ChineseTtsVoice GetRandomExclude()
+        // 1. 随机任意一个（排除默认）+ 百分比权重
+        public static ChineseTtsVoice GetRandomExclude(int weightPercentage = 80)
         {
             var all = Enum.GetValues(typeof(ChineseTtsVoice)).Cast<ChineseTtsVoice>().ToList();
             all = all.Where(f => f != DefaultFemale && f != DefaultMale).ToList();
-            return all[_random.Next(all.Count)];
+            return GetWeightedRandom(all, weightPercentage);
+        }
+
+        /// <summary>
+        /// 加权随机：百分比越高，前5个概率越大
+        /// </summary>
+        private static ChineseTtsVoice GetWeightedRandom(List<ChineseTtsVoice> list, int percentage)
+        {
+            if (list == null || list.Count == 0)
+                return default;
+
+            // 确保 0~100 之间
+            percentage = Math.Clamp(percentage, 0, 100);
+
+            const int topCount = 5; // 固定前5个
+            var topItems = list.Take(topCount).ToList();
+
+            // 百分比越高，越容易选前5个
+            if (_random.NextDouble() < percentage / 100.0 && topItems.Any())
+            {
+                return topItems[_random.Next(topItems.Count)];
+            }
+
+            // 否则全列表随机
+            return list[_random.Next(list.Count)];
         }
     }
 }