/**
 * Callback Registry - Global callback system for PraisonAI TypeScript
 *
 * Provides display and approval callbacks matching Python's callback system.
 *
 * @example
 * ```typescript
 * import { registerDisplayCallback, registerApprovalCallback } from 'praisonai';
 *
 * // Register display callback
 * registerDisplayCallback('agent_output', (data) => {
 *   console.log('Agent:', data.content);
 * });
 *
 * // Register approval callback
 * registerApprovalCallback(async (action) => {
 *   return action.risk === 'low'; // Auto-approve low risk
 * });
 * ```
 */
/**
 * Display callback function type
 */
export type DisplayCallbackFn = (data: DisplayCallbackData) => void | Promise<void>;
/**
 * Display callback data
 */
export interface DisplayCallbackData {
    type: string;
    content?: string;
    agentName?: string;
    toolName?: string;
    timestamp: number;
    metadata?: Record<string, any>;
}
/**
 * Approval request
 */
export interface ApprovalRequest {
    action: string;
    arguments: Record<string, any>;
    risk: 'low' | 'medium' | 'high' | 'critical';
    toolName?: string;
    agentName?: string;
    description?: string;
}
/**
 * Approval decision
 */
export interface ApprovalDecision {
    approved: boolean;
    reason?: string;
    modifiedArgs?: Record<string, any>;
}
/**
 * Approval callback function type
 */
export type ApprovalCallbackFn = (request: ApprovalRequest) => ApprovalDecision | Promise<ApprovalDecision>;
/**
 * Register a display callback for a specific type
 */
export declare function registerDisplayCallback(displayType: string, callback: DisplayCallbackFn, isAsync?: boolean): void;
/**
 * Unregister a display callback
 */
export declare function unregisterDisplayCallback(displayType: string, callback: DisplayCallbackFn): boolean;
/**
 * Register global approval callback
 */
export declare function registerApprovalCallback(callback: ApprovalCallbackFn): void;
/**
 * Clear approval callback
 */
export declare function clearApprovalCallback(): void;
/**
 * Execute sync callbacks for a display type
 */
export declare function executeSyncCallback(displayType: string, data: Omit<DisplayCallbackData, 'type' | 'timestamp'>): void;
/**
 * Execute all callbacks (sync and async) for a display type
 */
export declare function executeCallback(displayType: string, data: Omit<DisplayCallbackData, 'type' | 'timestamp'>): Promise<void>;
/**
 * Request approval for an action
 */
export declare function requestApproval(request: ApprovalRequest): Promise<ApprovalDecision>;
/**
 * Check if approval callback is registered
 */
export declare function hasApprovalCallback(): boolean;
/**
 * Get registered display types
 */
export declare function getRegisteredDisplayTypes(): string[];
/**
 * Clear all callbacks
 */
export declare function clearAllCallbacks(): void;
/**
 * Common display types
 */
export declare const DisplayTypes: {
    readonly AGENT_OUTPUT: "agent_output";
    readonly AGENT_THINKING: "agent_thinking";
    readonly TOOL_CALL: "tool_call";
    readonly TOOL_RESULT: "tool_result";
    readonly LLM_REQUEST: "llm_request";
    readonly LLM_RESPONSE: "llm_response";
    readonly ERROR: "error";
    readonly WARNING: "warning";
    readonly INFO: "info";
    readonly DEBUG: "debug";
    readonly WORKFLOW_START: "workflow_start";
    readonly WORKFLOW_COMPLETE: "workflow_complete";
    readonly STEP_START: "step_start";
    readonly STEP_COMPLETE: "step_complete";
};
export type DisplayType = typeof DisplayTypes[keyof typeof DisplayTypes];
declare const _default: {
    registerDisplayCallback: typeof registerDisplayCallback;
    unregisterDisplayCallback: typeof unregisterDisplayCallback;
    registerApprovalCallback: typeof registerApprovalCallback;
    clearApprovalCallback: typeof clearApprovalCallback;
    executeSyncCallback: typeof executeSyncCallback;
    executeCallback: typeof executeCallback;
    requestApproval: typeof requestApproval;
    hasApprovalCallback: typeof hasApprovalCallback;
    getRegisteredDisplayTypes: typeof getRegisteredDisplayTypes;
    clearAllCallbacks: typeof clearAllCallbacks;
    DisplayTypes: {
        readonly AGENT_OUTPUT: "agent_output";
        readonly AGENT_THINKING: "agent_thinking";
        readonly TOOL_CALL: "tool_call";
        readonly TOOL_RESULT: "tool_result";
        readonly LLM_REQUEST: "llm_request";
        readonly LLM_RESPONSE: "llm_response";
        readonly ERROR: "error";
        readonly WARNING: "warning";
        readonly INFO: "info";
        readonly DEBUG: "debug";
        readonly WORKFLOW_START: "workflow_start";
        readonly WORKFLOW_COMPLETE: "workflow_complete";
        readonly STEP_START: "step_start";
        readonly STEP_COMPLETE: "step_complete";
    };
};
export default _default;