从新设计抽奖逻辑

server/app/api/logic/PlayStartLogic.php

@@ -70,35 +70,47 @@ class PlayStartLogic
             throw new ApiException('奖池配置不存在');
         }
 
-        // 先按奖池权重抽出档位 T1-T5
-        $tier = LotteryService::drawTierByWeights($config);
-
-        // 生成 5 个 1-6 的点数，计算总和 roll_number（即本局摇到的点数）
-        $rollArray = $this->generateRollArray();
-        $rollNumber = (int) array_sum($rollArray);
-
-        // 索引范围为 0~25 共 26 个格子
-        $boardSize = 26;
-
-        // 1. 根据抽到的档位，在 tier 相等的数据中任选一条，其 id 为结束索引 target_index（从缓存读取）
-        $tierRewards = DiceRewardConfig::getCachedByTier($tier);
-        if (empty($tierRewards)) {
-            Log::error("档位 {$tier} 无任何奖励配置");
-            throw new ApiException('该档位暂无奖励配置');
+        // 按玩家权重抽取档位；若该档位无奖励或该方向下均无可用路径则重新摇取档位
+        $maxTierRetry = 10;
+        $chosen = null;
+        $startCandidates = [];
+        $tier = null;
+        for ($tierAttempt = 0; $tierAttempt < $maxTierRetry; $tierAttempt++) {
+            $tier = LotteryService::drawTierByPlayerWeights($player);
+            $tierRewards = DiceRewardConfig::getCachedByTier($tier);
+            if (empty($tierRewards)) {
+                Log::warning("档位 {$tier} 无任何奖励配置，重新摇取档位");
+                continue;
+            }
+            $maxRewardRetry = count($tierRewards);
+            for ($attempt = 0; $attempt < $maxRewardRetry; $attempt++) {
+                $chosen = $tierRewards[array_rand($tierRewards)];
+                $chosenId = (int) ($chosen['id'] ?? 0);
+                if ($direction === 0) {
+                    $startCandidates = DiceRewardConfig::getCachedBySEndIndex($chosenId);
+                } else {
+                    $startCandidates = DiceRewardConfig::getCachedByNEndIndex($chosenId);
+                }
+                if (!empty($startCandidates)) {
+                    break 2;
+                }
+                Log::warning("方向 {$direction} 下无 s_end_index/n_end_index={$chosenId} 的配置，重新摇取");
+            }
+            Log::warning("方向 {$direction} 下档位 {$tier} 所有奖励均无可用路径配置，重新摇取档位");
         }
-        $chosen = $tierRewards[array_rand($tierRewards)];
-        $targetIndex = (int) ($chosen['id'] ?? 0);
-        $targetIndex = (($targetIndex % $boardSize) + $boardSize) % $boardSize;
-
-        // 2. 根据结果反推起始点 start_index（由 target_index 与方向反算）
-        // 顺时针(direction=0): targetIndex = (startIndex + rollNumber) % 26  =>  startIndex = (targetIndex - rollNumber) % 26
-        // 逆时针(direction=1): targetIndex = (startIndex - rollNumber) % 26  =>  startIndex = (targetIndex + rollNumber) % 26
-        if ($direction === 0) {
-            $startIndex = ($targetIndex - $rollNumber) % $boardSize;
-        } else {
-            $startIndex = ($targetIndex + $rollNumber) % $boardSize;
+        if (empty($startCandidates)) {
+            Log::error("方向 {$direction} 下多次摇取档位后仍无可用路径配置");
+            throw new ApiException('该方向下暂无可用路径配置');
         }
-        $startIndex = ($startIndex % $boardSize + $boardSize) % $boardSize;
+        $chosenId = (int) ($chosen['id'] ?? 0);
+        $startRecord = $startCandidates[array_rand($startCandidates)];
+
+        $startIndex = (int) ($startRecord['id'] ?? 0);
+        $targetIndex = $direction === 0
+            ? (int) ($startRecord['s_end_index'] ?? 0)
+            : (int) ($startRecord['n_end_index'] ?? 0);
+        $rollNumber = (int) ($startRecord['grid_number'] ?? 0);
+        $rollArray = $this->generateRollArrayFromSum($rollNumber);
 
         Log::info(sprintf(
             '摇取点数 roll_number=%d, 方向=%d, start_index=%d, target_index=%d',
@@ -112,7 +124,7 @@ class PlayStartLogic
 
         $record = null;
         $configId = (int) $config->id;
-        $rewardId = (int) ($chosen['id'] ?? 0);
+        $rewardId = $chosenId;
         $configName = (string) ($config->name ?? '');
         $isTierT5 = (string) ($chosen['tier'] ?? '') === 'T5';
         try {
@@ -224,16 +236,30 @@ class PlayStartLogic
         if (isset($arr['roll_array']) && is_string($arr['roll_array'])) {
             $arr['roll_array'] = json_decode($arr['roll_array'], true) ?? [];
         }
+        $arr['roll_number'] = is_array($arr['roll_array'] ?? null) ? array_sum($arr['roll_array']) : 0;
         return $arr;
     }
 
-    /** 生成 5 个 1-6 的点数，roll_number 为其总和 */
-    private function generateRollArray(): array
+    /**
+     * 根据摇取点数（5-30）生成 5 个色子数组，每个 1-6，总和为 $sum
+     * @return int[] 如 [1,2,3,4,5]
+     */
+    private function generateRollArrayFromSum(int $sum): array
     {
-        $dice = [];
-        for ($i = 0; $i < 5; $i++) {
-            $dice[] = random_int(1, 6);
+        $sum = max(5, min(30, $sum));
+        $arr = [1, 1, 1, 1, 1];
+        $remain = $sum - 5;
+        for ($i = 0; $i < $remain; $i++) {
+            $candidates = array_keys(array_filter($arr, function ($v) {
+                return $v < 6;
+            }));
+            if (empty($candidates)) {
+                break;
+            }
+            $idx = $candidates[array_rand($candidates)];
+            $arr[$idx]++;
         }
-        return $dice;
+        shuffle($arr);
+        return array_values($arr);
     }
 }