/**
 * Command Router Implementation
 * Routes Redis commands to appropriate CacheEngine methods
 * Requirements: 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 1.10, 1.11, 1.12
 */
import { CacheEngine } from '../cache/CacheEngine.js';
import { ListOperations } from '../cache/ListOperations.js';
import { HashOperations } from '../cache/HashOperations.js';
import { SetOperations } from '../cache/SetOperations.js';
/**
 * CommandRouter routes Redis commands to the appropriate handler methods.
 * It takes dependencies on CacheEngine and data structure operations classes.
 *
 * Requirements:
 * - 1.1: Support GET command
 * - 1.2: Support SET command with optional TTL
 * - 1.3: Support DEL command
 * - 1.4: Support MGET command
 * - 1.5: Support MSET command
 * - 1.6: Support EXISTS command
 * - 1.7: Support EXPIRE command
 * - 1.8: Support TTL command
 * - 1.9: Support INCR and DECR commands
 * - 1.10: Support list commands (LPUSH, RPUSH, LPOP, RPOP, LRANGE)
 * - 1.11: Support hash commands (HSET, HGET, HMSET, HMGET, HGETALL)
 * - 1.12: Support set commands (SADD, SREM, SMEMBERS, SISMEMBER)
 */
export declare class CommandRouter {
    private readonly cacheEngine;
    private readonly listOps;
    private readonly hashOps;
    private readonly setOps;
    private readonly serializer;
    constructor(cacheEngine: CacheEngine, listOps: ListOperations, hashOps: HashOperations, setOps: SetOperations);
    /**
     * Handle a Redis command and return the RESP-formatted response.
     *
     * @param command - Array of command parts (command name + arguments)
     * @returns Buffer containing RESP-formatted response
     */
    handleCommand(command: string[]): Promise<Buffer>;
    /**
     * Handle PING command
     * @returns PONG response
     */
    private handlePing;
    /**
     * Handle GET command
     * GET key → return bulk string or null
     *
     * Requirement 1.1: Support GET command
     */
    private handleGet;
    /**
     * Handle SET command
     * SET key value [EX seconds] [NX|XX] → return OK
     *
     * Requirement 1.2: Support SET command with optional TTL
     */
    private handleSet;
    /**
     * Handle DEL command
     * DEL key [key ...] → return integer (count deleted)
     *
     * Requirement 1.3: Support DEL command
     */
    private handleDel;
    /**
     * Handle EXISTS command
     * EXISTS key [key ...] → return integer (count existing)
     *
     * Requirement 1.6: Support EXISTS command
     */
    private handleExists;
    /**
     * Handle EXPIRE command
     * EXPIRE key seconds → return integer (1 if set, 0 if key not found)
     *
     * Requirement 1.7: Support EXPIRE command
     */
    private handleExpire;
    /**
     * Handle TTL command
     * TTL key → return integer (seconds remaining, -1 no expiry, -2 not found)
     *
     * Requirement 1.8: Support TTL command
     */
    private handleTtl;
    /**
     * Handle MGET command
     * MGET key [key ...] → return array of bulk strings
     *
     * Requirement 1.4: Support MGET command
     */
    private handleMget;
    /**
     * Handle MSET command
     * MSET key value [key value ...] → return OK
     *
     * Requirement 1.5: Support MSET command
     */
    private handleMset;
    /**
     * Handle INCR command
     * INCR key → return integer (new value)
     *
     * Requirement 1.9: Support INCR command
     */
    private handleIncr;
    /**
     * Handle DECR command
     * DECR key → return integer (new value)
     *
     * Requirement 1.9: Support DECR command
     */
    private handleDecr;
    /**
     * Handle LPUSH command
     * LPUSH key value [value ...] → return integer (list length)
     *
     * Requirement 1.10: Support LPUSH command
     */
    private handleLpush;
    /**
     * Handle RPUSH command
     * RPUSH key value [value ...] → return integer (list length)
     *
     * Requirement 1.10: Support RPUSH command
     */
    private handleRpush;
    /**
     * Handle LPOP command
     * LPOP key → return bulk string or null
     *
     * Requirement 1.10: Support LPOP command
     */
    private handleLpop;
    /**
     * Handle RPOP command
     * RPOP key → return bulk string or null
     *
     * Requirement 1.10: Support RPOP command
     */
    private handleRpop;
    /**
     * Handle LRANGE command
     * LRANGE key start stop → return array
     *
     * Requirement 1.10: Support LRANGE command
     */
    private handleLrange;
    /**
     * Handle HSET command
     * HSET key field value → return integer (1 new, 0 updated)
     *
     * Requirement 1.11: Support HSET command
     */
    private handleHset;
    /**
     * Handle HGET command
     * HGET key field → return bulk string or null
     *
     * Requirement 1.11: Support HGET command
     */
    private handleHget;
    /**
     * Handle HMSET command
     * HMSET key field value [field value ...] → return OK
     *
     * Requirement 1.11: Support HMSET command
     */
    private handleHmset;
    /**
     * Handle HMGET command
     * HMGET key field [field ...] → return array
     *
     * Requirement 1.11: Support HMGET command
     */
    private handleHmget;
    /**
     * Handle HGETALL command
     * HGETALL key → return array (alternating field/value)
     *
     * Requirement 1.11: Support HGETALL command
     */
    private handleHgetall;
    /**
     * Handle SADD command
     * SADD key member [member ...] → return integer (count added)
     *
     * Requirement 1.12: Support SADD command
     */
    private handleSadd;
    /**
     * Handle SREM command
     * SREM key member [member ...] → return integer (count removed)
     *
     * Requirement 1.12: Support SREM command
     */
    private handleSrem;
    /**
     * Handle SMEMBERS command
     * SMEMBERS key → return array
     *
     * Requirement 1.12: Support SMEMBERS command
     */
    private handleSmembers;
    /**
     * Handle SISMEMBER command
     * SISMEMBER key member → return integer (1 or 0)
     *
     * Requirement 1.12: Support SISMEMBER command
     */
    private handleSismember;
}
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