/**
 * IMO Validation Utility
 *
 * Centralizes IMO number validation and parsing logic that was duplicated
 * across 13 different tool methods in the codebase.
 *
 * This utility extracts the common patterns:
 * - IMO parameter validation (null/undefined/empty string checks)
 * - IMO number parsing with regex validation
 * - Standardized error handling for invalid IMO formats
 */
export declare class MissingParameterError extends Error {
    param: string;
    tool_name: string;
    constructor(param: string, tool_name: string);
}
export declare class InvalidImoError extends Error {
    imo: string;
    constructor(imo: string);
}
/**
 * Validates that an IMO parameter is present and not empty
 * @param imo - The IMO parameter to validate
 * @param toolName - The name of the tool calling this validation
 * @throws MissingParameterError if IMO is missing or empty
 */
export declare function validateImoParameter(imo: any, toolName: string): void;
/**
 * Validates that an IMO parameter is present (basic check)
 * @param imo - The IMO parameter to validate
 * @param toolName - The name of the tool calling this validation
 * @throws MissingParameterError if IMO is missing
 */
export declare function validateImoParameterBasic(imo: any, toolName: string): void;
/**
 * Parses IMO for API methods - returns number if valid numeric string, otherwise original value
 * @param imo - The IMO value to parse
 * @returns Parsed IMO number or original value
 */
export declare function parseImoForApi(imo: any): number | any;
/**
 * Parses IMO for database methods - always returns a number
 * @param imo - The IMO value to parse
 * @returns Parsed IMO number
 */
export declare function parseImoForDatabase(imo: any): number;
/**
 * Validates and parses IMO for API methods
 * @param imo - The IMO parameter to validate and parse
 * @param toolName - The name of the tool calling this function
 * @returns Parsed IMO number or original value
 * @throws MissingParameterError if IMO is missing or empty
 */
export declare function validateAndParseImoForApi(imo: any, toolName: string): number | any;
/**
 * Validates and parses IMO for database methods
 * @param imo - The IMO parameter to validate and parse
 * @param toolName - The name of the tool calling this function
 * @returns Parsed IMO number
 * @throws MissingParameterError if IMO is missing or empty
 */
export declare function validateAndParseImoForDatabase(imo: any, toolName: string): number;
/**
 * Validates and parses IMO for position methods (basic validation)
 * @param imo - The IMO parameter to validate
 * @param toolName - The name of the tool calling this function
 * @returns Original IMO value
 * @throws MissingParameterError if IMO is missing
 */
export declare function validateAndParseImoForPosition(imo: any, toolName: string): any;
/**
 * Validates IMO format using regex (digits only)
 * @param imo - The IMO string to validate
 * @returns true if IMO contains only digits
 */
export declare function isValidImoFormat(imo: string): boolean;
/**
 * Validates IMO checksum according to IMO standard (DISABLED for demo data compatibility)
 * @param _imo - The IMO string to validate (unused)
 * @returns true (checksum validation disabled)
 */
export declare function validateImoChecksum(_imo: string): boolean;
/**
 * Comprehensive IMO validation with checksum
 * @param imo - The IMO value to validate
 * @param requireChecksum - Whether to validate IMO checksum (default: false)
 * @returns true if IMO is valid
 */
export declare function validateImoFormat(imo: any, requireChecksum?: boolean): boolean;
/**
 * Validates an IMO number and returns validation result with error message
 * @param imo - The IMO number to validate
 * @returns Object with isValid boolean and error message if invalid
 */
export declare function validateIMO(imo: any): {
    isValid: boolean;
    error?: string;
};