import type { Message, Options, SerializedLLM, ServiceName } from './types';
/**
 * Interface for LLM instance (to avoid circular dependency)
 */
export interface SerializableLLM {
    readonly service: ServiceName;
    readonly model: string;
    readonly messages: Message[];
    readonly options: Partial<Options>;
}
/**
 * Factory function type for creating LLM instances
 */
export type LLMFactory = (messages: Message[], options: Options) => SerializableLLM;
/**
 * Handles serialization and deserialization of LLM instances and messages
 */
export declare class Serializer {
    private static llmFactory;
    /**
     * Register the LLM factory for deserialization
     * This should be called by the LLM class during initialization
     */
    static registerFactory(factory: LLMFactory): void;
    /**
     * Serialize an LLM instance to a SerializedLLM object
     */
    static serializeLLM(llm: SerializableLLM): SerializedLLM;
    /**
     * Deserialize a SerializedLLM object back to an LLM instance
     * @throws ValidationError if no factory is registered or data is invalid
     */
    static deserializeLLM(data: SerializedLLM): SerializableLLM;
    /**
     * Serialize messages to a JSON string
     */
    static serializeMessages(messages: Message[]): string;
    /**
     * Deserialize a JSON string to messages
     * @throws ValidationError if JSON is invalid or messages are malformed
     */
    static deserializeMessages(json: string): Message[];
    /**
     * Validate a SerializedLLM object
     */
    private static validateSerializedLLM;
    /**
     * Validate a single message
     */
    private static validateMessage;
    /**
     * Deep clone messages array
     */
    private static cloneMessages;
    /**
     * Clone options (excluding non-serializable properties)
     */
    private static cloneOptions;
    /**
     * Convert SerializedLLM to JSON string
     */
    static toJSON(llm: SerializableLLM): string;
    /**
     * Parse JSON string to SerializedLLM
     */
    static fromJSON(json: string): SerializedLLM;
}
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