load balancing strategy

sessionManager.mjs

@@ -1,21 +1,42 @@
 class SessionManager {
     constructor(provider) {
         this.sessions = provider.sessions;
+        this.provider = provider;
+
+        // 初始化账号锁定状态
+        for (const username in this.sessions) {
+            this.sessions[username].locked = false;
+        }
     }
 
-    // 获取所有可用会话
+    // 获取所有可用且未锁定会话
     getAvailableSessions() {
-        return Object.keys(this.sessions).filter(username => this.sessions[username].valid);
+        const currentMode = this.provider.currentMode;
+
+        return Object.keys(this.sessions).filter(username => {
+            const session = this.sessions[username];
+            return session.valid && !session.locked && session.modeStatus[currentMode];
+        });
     }
 
-    // 随机选择会话
+    // 随机选择一个可用会话
     getRandomSession() {
         const availableSessions = this.getAvailableSessions();
         if (availableSessions.length === 0) {
             throw new Error('没有可用的会话');
         }
         const randomIndex = Math.floor(Math.random() * availableSessions.length);
-        return availableSessions[randomIndex];
+        const selectedUsername = availableSessions[randomIndex];
+        // 锁定账号
+        this.sessions[selectedUsername].locked = true;
+        return selectedUsername;
+    }
+
+    // 释放账号锁定
+    releaseSession(username) {
+        if (this.sessions[username]) {
+            this.sessions[username].locked = false;
+        }
     }
 
     // 策略