refactor: optimize data cleanup functions in director console

- Add redrawCurrentRound() method to clear current round winners
- Add /api/admin/lottery/redraw API endpoint
- Rename "重置" to "重置本轮" (reset current round state only)
- Add "重抽本轮" button (clear winners and allow re-draw)
- Rename "紧急操作" to "数据管理" with clearer button labels
- Change "高级清理" to collapsible "开发者选项"
- Update confirmation modal text for clarity

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/client-screen/src/views/AdminControl.vue

@@ -41,6 +41,15 @@ const confirmResetCode = ref('');
 const showResetModal = ref(false);
 const resetScope = ref<'all' | 'voting' | 'lottery'>('all');
 
+// Advanced cleanup state
+const showAdvancedCleanupModal = ref(false);
+const confirmCleanupCode = ref('');
+const cleanupLoading = ref(false);
+const cleanupOptions = ref({
+  lottery: { redis: true, mysql: true },
+  voting: { redis: false, mysql: false },
+});
+
 // Toast notification state
 const toast = ref<{ show: boolean; message: string; type: 'error' | 'success' | 'info' }>({
   show: false,
@@ -237,7 +246,7 @@ function goBack() {
 }
 
 // Phase control
-function setPhase(phase: 'IDLE' | 'VOTING' | 'LOTTERY' | 'RESULTS') {
+function setPhase(phase: 'IDLE' | 'VOTING' | 'LOTTERY' | 'RESULTS' | 'LOTTERY_RESULTS') {
   admin.setPhase(phase);
 }
 
@@ -315,6 +324,28 @@ const resetLottery = debounceLeading(() => {
   admin.controlLottery('reset');
 }, 500);
 
+// Redraw current round
+const showRedrawConfirm = ref(false);
+
+async function redrawCurrentRound() {
+  try {
+    const res = await fetch('/api/admin/lottery/redraw', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+    });
+    const data = await res.json();
+    if (data.success) {
+      showToast(data.message || '本轮已重置，可重新抽取', 'success');
+    } else {
+      showToast(data.error || '重抽失败', 'error');
+    }
+  } catch (e) {
+    showToast('网络错误', 'error');
+  } finally {
+    showRedrawConfirm.value = false;
+  }
+}
+
 // Emergency reset
 function openResetModal(scope: 'all' | 'voting' | 'lottery') {
   resetScope.value = scope;
@@ -333,6 +364,54 @@ function cancelReset() {
   confirmResetCode.value = '';
 }
 
+// Advanced cleanup
+function openAdvancedCleanupModal() {
+  confirmCleanupCode.value = '';
+  cleanupOptions.value = {
+    lottery: { redis: true, mysql: true },
+    voting: { redis: false, mysql: false },
+  };
+  showAdvancedCleanupModal.value = true;
+}
+
+function cancelAdvancedCleanup() {
+  showAdvancedCleanupModal.value = false;
+  confirmCleanupCode.value = '';
+}
+
+async function confirmAdvancedCleanup() {
+  if (confirmCleanupCode.value !== 'ADVANCED_CLEANUP') return;
+  
+  cleanupLoading.value = true;
+  try {
+    const res = await fetch('/api/admin/cleanup', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({
+        lottery: cleanupOptions.value.lottery,
+        voting: cleanupOptions.value.voting,
+        confirmCode: confirmCleanupCode.value,
+      }),
+    });
+    const data = await res.json();
+    if (data.success) {
+      const results = data.data;
+      let message = '清理完成：';
+      if (results.lottery?.mysql) message += `抽奖数据 ${results.lottery.dbCount} 条；`;
+      if (results.voting?.mysql) message += `投票数据 ${results.voting.dbCount} 条；`;
+      showToast(message, 'success');
+    } else {
+      showToast(data.error || '清理失败', 'error');
+    }
+  } catch (e) {
+    showToast('网络错误', 'error');
+  } finally {
+    cleanupLoading.value = false;
+    showAdvancedCleanupModal.value = false;
+    confirmCleanupCode.value = '';
+  }
+}
+
 // Music control
 function toggleMusic() {
   if (admin.musicPlaying) {
@@ -379,6 +458,7 @@ const phaseLabel = computed(() => {
     case 'VOTING': return '投票中';
     case 'LOTTERY': return '抽奖中';
     case 'RESULTS': return '结果展示';
+    case 'LOTTERY_RESULTS': return '抽奖结果';
     default: return '未知';
   }
 });
@@ -643,7 +723,13 @@ onMounted(() => {
                 :disabled="admin.pendingAction === 'lottery_reset'"
                 @click="resetLottery"
               >
-                重置
+                重置本轮
+              </button>
+              <button
+                class="ctrl-btn warning"
+                @click="showRedrawConfirm = true"
+              >
+                重抽本轮
               </button>
             </div>
           </div>
@@ -800,6 +886,13 @@ onMounted(() => {
               >
                 结果展示
               </button>
+              <button
+                class="ctrl-btn"
+                :class="{ active: admin.systemPhase === 'LOTTERY_RESULTS' }"
+                @click="setPhase('LOTTERY_RESULTS')"
+              >
+                抽奖结果
+              </button>
             </div>
           </div>
 
@@ -833,15 +926,25 @@ onMounted(() => {
             </div>
           </div>
 
+          <!-- Developer Options (Collapsible) -->
+          <details class="control-group dev-options">
+            <summary><h4>开发者选项</h4></summary>
+            <div class="button-group">
+              <button class="ctrl-btn warning-outline" @click="openAdvancedCleanupModal">
+                高级数据清理
+              </button>
+            </div>
+          </details>
+
           <!-- Emergency Reset -->
           <div class="control-group danger-zone">
-            <h4>紧急操作</h4>
+            <h4>数据管理</h4>
             <div class="button-group">
               <button class="ctrl-btn danger-outline" @click="openResetModal('voting')">
-                重置投票
+                清空投票数据
               </button>
               <button class="ctrl-btn danger-outline" @click="openResetModal('lottery')">
-                重置抽奖
+                清空抽奖数据
               </button>
               <button class="ctrl-btn danger" @click="openResetModal('all')">
                 全部重置
@@ -855,12 +958,12 @@ onMounted(() => {
     <!-- Reset Confirmation Modal -->
     <div v-if="showResetModal" class="modal-overlay" @click.self="cancelReset">
       <div class="modal">
-        <h3>确认重置</h3>
+        <h3>确认操作</h3>
         <p>
-          您即将重置
+          您即将清空
           <strong>{{ resetScope === 'all' ? '所有数据' : resetScope === 'voting' ? '投票数据' : '抽奖数据' }}</strong>
         </p>
-        <p class="warning-text">此操作不可撤销！</p>
+        <p class="warning-text">此操作将清除 Redis 缓存和数据库记录，不可撤销！</p>
         <div class="modal-input">
           <label>请输入 <code>RESET</code> 确认:</label>
           <input
@@ -882,6 +985,86 @@ onMounted(() => {
         </div>
       </div>
     </div>
+
+    <!-- Redraw Confirmation Modal -->
+    <div v-if="showRedrawConfirm" class="modal-overlay" @click.self="showRedrawConfirm = false">
+      <div class="modal">
+        <h3>确认重抽本轮</h3>
+        <p>您即将清除<strong>第{{ admin.lotteryRound }}轮</strong>的中奖者记录</p>
+        <p class="warning-text">清除后可重新抽取本轮，此操作不可撤销！</p>
+        <div class="modal-actions">
+          <button class="ctrl-btn outline" @click="showRedrawConfirm = false">取消</button>
+          <button class="ctrl-btn warning" @click="redrawCurrentRound">
+            确认重抽
+          </button>
+        </div>
+      </div>
+    </div>
+
+    <!-- Advanced Cleanup Modal -->
+    <div v-if="showAdvancedCleanupModal" class="modal-overlay" @click.self="cancelAdvancedCleanup">
+      <div class="modal cleanup-modal">
+        <h3>高级数据清理</h3>
+        <p>选择要清理的数据类型和存储层：</p>
+        
+        <div class="cleanup-sections">
+          <!-- Lottery Cleanup Options -->
+          <div class="cleanup-section">
+            <h4>🎁 抽奖数据</h4>
+            <div class="cleanup-options">
+              <label class="checkbox-label">
+                <input type="checkbox" v-model="cleanupOptions.lottery.redis" />
+                <span>Redis 缓存</span>
+                <small>(中奖者集合、抽奖历史)</small>
+              </label>
+              <label class="checkbox-label">
+                <input type="checkbox" v-model="cleanupOptions.lottery.mysql" />
+                <span>MySQL 数据库</span>
+                <small>(中奖记录、抽奖会话)</small>
+              </label>
+            </div>
+          </div>
+
+          <!-- Voting Cleanup Options -->
+          <div class="cleanup-section">
+            <h4>🗳️ 投票数据</h4>
+            <div class="cleanup-options">
+              <label class="checkbox-label">
+                <input type="checkbox" v-model="cleanupOptions.voting.redis" />
+                <span>Redis 缓存</span>
+                <small>(实时票数、排行榜)</small>
+              </label>
+              <label class="checkbox-label">
+                <input type="checkbox" v-model="cleanupOptions.voting.mysql" />
+                <span>MySQL 数据库</span>
+                <small>(投票记录、票数统计)</small>
+              </label>
+            </div>
+          </div>
+        </div>
+
+        <p class="warning-text">⚠️ 此操作不可撤销！系统状态将保持不变。</p>
+        <div class="modal-input">
+          <label>请输入 <code>ADVANCED_CLEANUP</code> 确认:</label>
+          <input
+            v-model="confirmCleanupCode"
+            type="text"
+            placeholder="ADVANCED_CLEANUP"
+            @keyup.enter="confirmAdvancedCleanup"
+          />
+        </div>
+        <div class="modal-actions">
+          <button class="ctrl-btn outline" @click="cancelAdvancedCleanup">取消</button>
+          <button
+            class="ctrl-btn warning"
+            :disabled="confirmCleanupCode !== 'ADVANCED_CLEANUP' || cleanupLoading"
+            @click="confirmAdvancedCleanup"
+          >
+            {{ cleanupLoading ? '清理中...' : '确认清理' }}
+          </button>
+        </div>
+      </div>
+    </div>
   </div>
 </template>
 
@@ -1368,6 +1551,16 @@ $admin-danger: #ef4444;
     }
   }
 
+  &.warning-outline {
+    background: transparent;
+    border-color: $admin-warning;
+    color: $admin-warning;
+
+    &:hover:not(:disabled) {
+      background: rgba($admin-warning, 0.1);
+    }
+  }
+
   &.outline {
     background: transparent;
     border-color: $admin-border;
@@ -1535,6 +1728,47 @@ $admin-danger: #ef4444;
       color: $admin-danger;
     }
   }
+
+  &.warning-zone {
+    padding-top: 20px;
+    border-top: 1px solid rgba($admin-warning, 0.3);
+
+    h4 {
+      color: $admin-warning;
+    }
+  }
+
+  &.dev-options {
+    padding-top: 20px;
+    border-top: 1px solid rgba($admin-warning, 0.3);
+
+    summary {
+      cursor: pointer;
+      list-style: none;
+
+      &::-webkit-details-marker {
+        display: none;
+      }
+
+      h4 {
+        display: inline;
+        color: $admin-warning;
+
+        &::before {
+          content: '▶ ';
+          font-size: 0.8em;
+        }
+      }
+    }
+
+    &[open] summary h4::before {
+      content: '▼ ';
+    }
+
+    .button-group {
+      margin-top: 12px;
+    }
+  }
 }
 
 // Modal
@@ -1609,6 +1843,75 @@ $admin-danger: #ef4444;
   }
 }
 
+// Advanced Cleanup Modal Styles
+.cleanup-modal {
+  width: 500px;
+  max-height: 80vh;
+  overflow-y: auto;
+}
+
+.cleanup-sections {
+  display: flex;
+  flex-direction: column;
+  gap: 20px;
+  margin: 20px 0;
+}
+
+.cleanup-section {
+  background: rgba(255, 255, 255, 0.02);
+  border: 1px solid $admin-border;
+  border-radius: 12px;
+  padding: 16px;
+
+  h4 {
+    font-size: 14px;
+    color: $admin-text;
+    margin: 0 0 12px 0;
+    display: flex;
+    align-items: center;
+    gap: 8px;
+  }
+}
+
+.cleanup-options {
+  display: flex;
+  flex-direction: column;
+  gap: 10px;
+
+  .checkbox-label {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    padding: 10px 12px;
+    background: rgba(255, 255, 255, 0.03);
+    border-radius: 8px;
+    cursor: pointer;
+    transition: background 0.2s;
+
+    &:hover {
+      background: rgba(255, 255, 255, 0.05);
+    }
+
+    input[type="checkbox"] {
+      width: 18px;
+      height: 18px;
+      accent-color: $admin-warning;
+    }
+
+    span {
+      font-size: 14px;
+      color: $admin-text;
+      font-weight: 500;
+    }
+
+    small {
+      margin-left: auto;
+      font-size: 12px;
+      color: $admin-text-muted;
+    }
+  }
+}
+
 // Award Statistics Styles
 .award-stats {
   display: grid;
@@ -1899,6 +2202,30 @@ $admin-danger: #ef4444;
     }
   }
 
+  .cleanup-modal {
+    width: 95vw;
+  }
+
+  .cleanup-section {
+    padding: 12px;
+
+    h4 {
+      font-size: 13px;
+    }
+  }
+
+  .cleanup-options .checkbox-label {
+    padding: 8px 10px;
+
+    span {
+      font-size: 13px;
+    }
+
+    small {
+      font-size: 11px;
+    }
+  }
+
   .modal-input input {
     padding: 10px;
     font-size: 14px;

packages/server/src/routes/admin.routes.ts

@@ -3,6 +3,7 @@ import multer from 'multer';
 import { participantService } from '../services/participant.service';
 import { prizeConfigService } from '../services/prize-config.service';
 import { programConfigService } from '../services/program-config.service';
+import { adminService } from '../services/admin.service';
 
 const router: IRouter = Router();
 const upload = multer({ storage: multer.memoryStorage() });
@@ -204,5 +205,95 @@ router.get('/participants', async (_req, res, next) => {
   }
 });
 
+/**
+ * GET /api/admin/lottery/results
+ * Get all lottery results from database
+ */
+router.get('/lottery/results', async (_req, res, next) => {
+  try {
+    const results = await adminService.getLotteryResults();
+    return res.json({
+      success: true,
+      data: results,
+    });
+  } catch (error) {
+    next(error);
+  }
+});
+
+/**
+ * DELETE /api/admin/lottery/history
+ * Clear all lottery history (requires confirmation code)
+ */
+router.delete('/lottery/history', async (req, res, next) => {
+  try {
+    const { confirmCode } = req.body;
+    const result = await adminService.clearLotteryHistory(confirmCode);
+    if (result.success) {
+      return res.json({
+        success: true,
+        message: result.message,
+        data: result.cleared,
+      });
+    } else {
+      return res.status(400).json({
+        success: false,
+        error: result.message,
+      });
+    }
+  } catch (error) {
+    next(error);
+  }
+});
+
+/**
+ * POST /api/admin/lottery/redraw
+ * Redraw current round - clears current round winners and allows re-drawing
+ */
+router.post('/lottery/redraw', async (_req, res, next) => {
+  try {
+    const result = await adminService.redrawCurrentRound();
+    if (result.success) {
+      return res.json({
+        success: true,
+        message: result.message,
+      });
+    } else {
+      return res.status(400).json({
+        success: false,
+        error: result.message,
+      });
+    }
+  } catch (error) {
+    next(error);
+  }
+});
+
+/**
+ * POST /api/admin/cleanup
+ * Advanced data cleanup with granular control
+ * Body: { lottery?: { redis?: boolean; mysql?: boolean }, voting?: { redis?: boolean; mysql?: boolean }, confirmCode: string }
+ */
+router.post('/cleanup', async (req, res, next) => {
+  try {
+    const { lottery, voting, confirmCode } = req.body;
+    const result = await adminService.advancedCleanup({ lottery, voting }, confirmCode);
+    if (result.success) {
+      return res.json({
+        success: true,
+        message: result.message,
+        data: result.results,
+      });
+    } else {
+      return res.status(400).json({
+        success: false,
+        error: result.message,
+      });
+    }
+  } catch (error) {
+    next(error);
+  }
+});
+
 export default router;
 

packages/server/src/services/admin.service.ts

@@ -3,6 +3,7 @@
  */
 import { EventEmitter } from 'events';
 import { redis } from '../config/redis';
+import { prisma } from '../config/db';
 import { logger } from '../utils/logger';
 import { prizeConfigService } from './prize-config.service';
 import { programConfigService } from './program-config.service';
@@ -436,10 +437,14 @@ class AdminService extends EventEmitter {
           if (this.state.lottery.subPhase !== 'STORM') {
             return { success: false, message: 'Must be in STORM state to reveal' };
           }
-          // Pick random winners (simplified - in production would use database)
+          // Pick random winners from participants
           const winners = this.pickRandomWinners();
           this.state.lottery.subPhase = 'REVEAL';
           this.state.lottery.currentWinners = winners;
+          
+          // Persist winners to database
+          await this.persistLotteryResults(winners);
+          
           // Auto-play fanfare music
           this.state.music.isPlaying = true;
           this.state.music.track = 'fanfare';
@@ -478,17 +483,9 @@ class AdminService extends EventEmitter {
           break;
 
         case 'reset':
-          // 使用服务器配置获取第一轮奖项
-          const resetPrizes = prizeConfigService.getPrizes();
-          const firstPrize = resetPrizes.find(p => p.round === 1) || resetPrizes[0] || PRIZE_CONFIG[0];
-          this.state.lottery = {
-            round: 1,
-            subPhase: 'IDLE',
-            prizeLevel: firstPrize?.level || '第一轮抽奖',
-            prizeName: firstPrize?.name || '幸运伴手礼',
-            winnerCount: firstPrize?.winnerCount || 7,
-            currentWinners: [],
-          };
+          // 仅重置当前轮次状态到 IDLE，不清理数据
+          this.state.lottery.subPhase = 'IDLE';
+          this.state.lottery.currentWinners = [];
           break;
       }
       await this.saveState();
@@ -500,6 +497,39 @@ class AdminService extends EventEmitter {
     }
   }
 
+  /**
+   * Redraw current round - clears current round winners and resets state
+   * Allows re-drawing the same round
+   */
+  async redrawCurrentRound(): Promise<{ success: boolean; message?: string }> {
+    try {
+      const currentRound = this.state.lottery.round;
+
+      // Clear current round winners from Redis
+      const roundWinnersKey = `draw:round:${currentRound}:winners`;
+      const winnersToRemove = await redis.smembers(roundWinnersKey);
+
+      if (winnersToRemove.length > 0) {
+        // Remove from global winners set
+        await redis.srem('draw:winners', ...winnersToRemove);
+        // Clear round-specific winners
+        await redis.del(roundWinnersKey);
+      }
+
+      // Reset lottery state to IDLE for current round
+      this.state.lottery.subPhase = 'IDLE';
+      this.state.lottery.currentWinners = [];
+
+      await this.saveState();
+      logger.warn({ round: currentRound, clearedWinners: winnersToRemove.length }, 'Current round redrawn');
+
+      return { success: true, message: `第${currentRound}轮已重置，可重新抽取` };
+    } catch (error) {
+      logger.error({ error }, 'Failed to redraw current round');
+      return { success: false, message: 'Failed to redraw current round' };
+    }
+  }
+
   /**
    * Pick random winners from real participants
    */
@@ -540,6 +570,106 @@ class AdminService extends EventEmitter {
     return winners;
   }
 
+  /**
+   * Persist lottery results to database
+   */
+  private async persistLotteryResults(winners: LotteryWinner[]): Promise<void> {
+    try {
+      const drawId = `draw-${Date.now()}`;
+      const prizeLevel = this.state.lottery.prizeLevel;
+      const prizeName = this.state.lottery.prizeName;
+      const round = this.state.lottery.round;
+      
+      // Create draw results in database
+      await prisma.drawResult.createMany({
+        data: winners.map(winner => ({
+          drawId,
+          prizeLevel,
+          prizeName,
+          winnerId: winner.id,
+          winnerName: winner.name,
+          winnerDepartment: winner.department,
+          drawnBy: 'system',
+        })),
+      });
+
+      // Create or update draw session
+      await prisma.drawSession.upsert({
+        where: { id: drawId },
+        create: {
+          id: drawId,
+          prizeLevel,
+          prizeName,
+          totalPrizes: winners.length,
+          drawnCount: winners.length,
+          isActive: false,
+          startedAt: new Date(),
+          endedAt: new Date(),
+        },
+        update: {
+          drawnCount: winners.length,
+          endedAt: new Date(),
+        },
+      });
+
+      logger.info(
+        { drawId, round, prizeName, winnerCount: winners.length },
+        'Lottery results persisted to database'
+      );
+    } catch (error) {
+      logger.error({ error }, 'Failed to persist lottery results');
+      // Don't throw - we don't want to break the lottery flow if DB fails
+    }
+  }
+
+  /**
+   * Get all lottery results from database
+   */
+  async getLotteryResults(): Promise<{
+    draws: Array<{
+      id: string;
+      prizeLevel: string;
+      prizeName: string;
+      winners: Array<{
+        id: string;
+        name: string;
+        department: string;
+      }>;
+      drawnAt: Date;
+    }>;
+  }> {
+    try {
+      const results = await prisma.drawResult.findMany({
+        orderBy: { drawnAt: 'desc' },
+      });
+
+      // Group by drawId
+      const grouped = new Map<string, typeof results>();
+      for (const result of results) {
+        const existing = grouped.get(result.drawId) || [];
+        existing.push(result);
+        grouped.set(result.drawId, existing);
+      }
+
+      const draws = Array.from(grouped.entries()).map(([drawId, winners]) => ({
+        id: drawId,
+        prizeLevel: winners[0]?.prizeLevel || '',
+        prizeName: winners[0]?.prizeName || '',
+        winners: winners.map(w => ({
+          id: w.winnerId,
+          name: w.winnerName,
+          department: w.winnerDepartment,
+        })),
+        drawnAt: winners[0]?.drawnAt || new Date(),
+      }));
+
+      return { draws };
+    } catch (error) {
+      logger.error({ error }, 'Failed to get lottery results');
+      return { draws: [] };
+    }
+  }
+
   /**
    * Emergency reset
    */
@@ -560,8 +690,9 @@ class AdminService extends EventEmitter {
           awards: programConfigService.getAwards(),
           allowLateCatch: programSettings.allowLateCatch,
         };
-        // Clear voting data in Redis
+        // Clear voting data in Redis and Database
         await this.clearVotingRedisData();
+        await this.clearVotingDbData();
       }
 
       if (scope === 'all' || scope === 'lottery') {
@@ -576,6 +707,9 @@ class AdminService extends EventEmitter {
           winnerCount: firstPrize?.winnerCount || 7,
           currentWinners: [],
         };
+        // Clear lottery data in Redis and Database
+        await this.clearLotteryRedisData();
+        await this.clearLotteryDbData();
       }
 
       if (scope === 'all') {
@@ -692,6 +826,180 @@ class AdminService extends EventEmitter {
       } while (cursor !== '0');
     }
   }
+
+  /**
+   * Clear lottery-related Redis keys
+   */
+  private async clearLotteryRedisData(): Promise<void> {
+    const patterns = [
+      'draw:winners*',
+      'draw:pool:*',
+      'draw:history',
+      'draw:excluded',
+      'draw:temp:*',
+    ];
+
+    for (const pattern of patterns) {
+      let cursor = '0';
+      do {
+        const [nextCursor, keys] = await redis.scan(cursor, 'MATCH', pattern, 'COUNT', 1000);
+        cursor = nextCursor;
+        if (keys.length > 0) {
+          await redis.del(...keys);
+        }
+      } while (cursor !== '0');
+    }
+
+    logger.info('Lottery Redis data cleared');
+  }
+
+  /**
+   * Clear lottery results from database
+   */
+  private async clearLotteryDbData(): Promise<void> {
+    try {
+      // Delete all draw results
+      await prisma.drawResult.deleteMany({});
+      // Delete all draw sessions
+      await prisma.drawSession.deleteMany({});
+      logger.info('Lottery database records cleared');
+    } catch (error) {
+      logger.error({ error }, 'Failed to clear lottery database records');
+      // Don't throw - we don't want to break the reset flow if DB fails
+    }
+  }
+
+  /**
+   * Clear voting results from database
+   */
+  private async clearVotingDbData(): Promise<void> {
+    try {
+      // Delete all votes
+      await prisma.vote.deleteMany({});
+      // Delete all vote counts
+      await prisma.voteCount.deleteMany({});
+      logger.info('Voting database records cleared');
+    } catch (error) {
+      logger.error({ error }, 'Failed to clear voting database records');
+      // Don't throw - we don't want to break the reset flow if DB fails
+    }
+  }
+
+  /**
+   * Clear all lottery data (Redis + Database)
+   * This is a destructive operation and should be used with caution
+   */
+  async clearLotteryHistory(confirmCode: string): Promise<{ success: boolean; message?: string; cleared?: { db: number; redis: boolean } }> {
+    if (confirmCode !== 'CLEAR_LOTTERY') {
+      return { success: false, message: 'Invalid confirmation code. Use CLEAR_LOTTERY to confirm.' };
+    }
+
+    try {
+      // Clear Redis data
+      await this.clearLotteryRedisData();
+
+      // Clear database records
+      const dbResult = await prisma.drawResult.count();
+      await this.clearLotteryDbData();
+
+      logger.warn('Lottery history cleared by admin');
+      return {
+        success: true,
+        message: 'Lottery history cleared successfully',
+        cleared: {
+          db: dbResult,
+          redis: true,
+        },
+      };
+    } catch (error) {
+      logger.error({ error }, 'Failed to clear lottery history');
+      return { success: false, message: 'Failed to clear lottery history' };
+    }
+  }
+
+  /**
+   * Advanced data cleanup - clears data by type and storage layer
+   * This provides granular control over what data to clear
+   */
+  async advancedCleanup(
+    options: {
+      lottery?: { redis?: boolean; mysql?: boolean };
+      voting?: { redis?: boolean; mysql?: boolean };
+    },
+    confirmCode: string
+  ): Promise<{
+    success: boolean;
+    message?: string;
+    results?: {
+      lottery?: { redis: boolean; mysql: boolean; dbCount: number };
+      voting?: { redis: boolean; mysql: boolean; dbCount: number };
+    };
+  }> {
+    if (confirmCode !== 'ADVANCED_CLEANUP') {
+      return { success: false, message: 'Invalid confirmation code. Use ADVANCED_CLEANUP to confirm.' };
+    }
+
+    const results: {
+      lottery?: { redis: boolean; mysql: boolean; dbCount: number };
+      voting?: { redis: boolean; mysql: boolean; dbCount: number };
+    } = {};
+
+    try {
+      // Handle lottery cleanup
+      if (options.lottery) {
+        const lotteryResult: { redis: boolean; mysql: boolean; dbCount: number } = {
+          redis: false,
+          mysql: false,
+          dbCount: 0,
+        };
+
+        if (options.lottery.redis) {
+          await this.clearLotteryRedisData();
+          lotteryResult.redis = true;
+        }
+
+        if (options.lottery.mysql) {
+          lotteryResult.dbCount = await prisma.drawResult.count();
+          await this.clearLotteryDbData();
+          lotteryResult.mysql = true;
+        }
+
+        results.lottery = lotteryResult;
+      }
+
+      // Handle voting cleanup
+      if (options.voting) {
+        const votingResult: { redis: boolean; mysql: boolean; dbCount: number } = {
+          redis: false,
+          mysql: false,
+          dbCount: 0,
+        };
+
+        if (options.voting.redis) {
+          await this.clearVotingRedisData();
+          votingResult.redis = true;
+        }
+
+        if (options.voting.mysql) {
+          votingResult.dbCount = await prisma.vote.count();
+          await this.clearVotingDbData();
+          votingResult.mysql = true;
+        }
+
+        results.voting = votingResult;
+      }
+
+      logger.warn({ options, results }, 'Advanced cleanup executed by admin');
+      return {
+        success: true,
+        message: 'Advanced cleanup completed successfully',
+        results,
+      };
+    } catch (error) {
+      logger.error({ error, options }, 'Failed to execute advanced cleanup');
+      return { success: false, message: 'Failed to execute advanced cleanup' };
+    }
+  }
 }
 
 export const adminService = new AdminService();