import { ConfigService } from '@nestjs/config';
import { DynamoDbService } from './dynamodb.service';
import { SessionItem } from './session.interface';
export declare class SessionService {
    private readonly dynamoDbService;
    private readonly config;
    private readonly logger;
    private readonly sessionTableName;
    private readonly ttlSeconds;
    /** When unset or invalid, session rows are not written (RYW read path still works on empty). */
    private readonly sessionWritesEnabled;
    constructor(dynamoDbService: DynamoDbService, config: ConfigService);
    /**
     * Build session pk: {userId}#{tenantCode}
     */
    private buildPk;
    /**
     * Build session sk: {moduleTableName}#{itemId}
     */
    private buildSk;
    private calculateTtl;
    /**
     * Write a session entry after a successful async command publish.
     * Called by CommandService after publishAsync only.
     * No-ops when RYW session TTL is not configured (`sessionWritesEnabled` is false).
     */
    put(userId: string, tenantCode: string, moduleTableName: string, itemId: string, version: number): Promise<void>;
    /**
     * Get a single session entry for a specific item.
     * Returns `null` without querying DynamoDB when session writes are disabled.
     */
    get(userId: string, tenantCode: string, moduleTableName: string, itemId: string): Promise<SessionItem | null>;
    /**
     * Delete a session entry.
     * Used to clean up the session once the data table has caught up to the command version.
     */
    delete(userId: string, tenantCode: string, moduleTableName: string, itemId: string): Promise<void>;
    /**
     * List session entries for a user scoped to a command module.
     *
     * Queries the session table by `{userId}#{tenantCode}` and filters to entries
     * whose sort key begins with `{moduleTableName}#`, returning only sessions
     * that belong to the given module.
     *
     * @param userId - The ID of the requesting user (from JWT `sub` claim).
     * @param tenantCode - The tenant the user is operating under.
     * @param moduleTableName - The `tableName` from `CommandModuleOptions` — used
     *   as the sort key prefix to scope results to a single command module.
     * @param limit - Maximum number of session entries to fetch. Defaults to
     *   `MAX_SESSION_ENTRIES` to prevent silent truncation from the underlying
     *   DynamoDB query's default limit of 10. Callers should rarely need to
     *   override this.
     * @returns The matching session entries, or an empty array if none exist or
     *   session writes are disabled.
     */
    listByUser(userId: string, tenantCode: string, moduleTableName: string, limit?: number): Promise<SessionItem[]>;
}