/**
 * Notification Configuration Constants
 *
 * Default configuration values for the notifications system.
 * These can be overridden at runtime through configuration objects.
 *
 * @module src/notifications/constants
 */
/**
 * Default notification category
 * Safest default for compliance - transactional emails must always be sent
 */
export declare const DEFAULT_NOTIFICATION_CATEGORY: "transactional";
/**
 * Retry Configuration
 */
export declare const RETRY_CONFIG: {
    /**
     * Default maximum number of retry attempts
     * Used when no specific retry count is provided
     */
    readonly DEFAULT_MAX_ATTEMPTS: 3;
    /**
     * Default initial delay between retries (milliseconds)
     * Used for exponential backoff calculation
     */
    readonly DEFAULT_INITIAL_DELAY_MS: 1000;
    /**
     * Maximum delay between retries (milliseconds)
     * Prevents exponential backoff from growing too large
     */
    readonly MAX_DELAY_MS: 30000;
    /**
     * Backoff multiplier for exponential backoff
     * Each retry delay = previous delay * multiplier
     */
    readonly BACKOFF_MULTIPLIER: 2;
};
/**
 * Attachment Configuration
 */
export declare const ATTACHMENT_CONFIG: {
    /**
     * Default maximum number of attachments per notification
     */
    readonly DEFAULT_MAX_ATTACHMENTS: 10;
    /**
     * Default maximum size per attachment (bytes)
     * 25MB - Common limit across providers
     */
    readonly DEFAULT_MAX_SIZE_PER_ATTACHMENT: number;
    /**
     * Default maximum total size of all attachments (bytes)
     * 25MB - Ensures we don't exceed provider limits
     */
    readonly DEFAULT_MAX_TOTAL_SIZE: number;
    /**
     * Maximum attachment size for SendGrid (bytes)
     * 30MB per SendGrid documentation
     */
    readonly SENDGRID_MAX_SIZE: number;
    /**
     * Maximum total attachment size for SendGrid (bytes)
     * 30MB per SendGrid documentation
     */
    readonly SENDGRID_MAX_TOTAL_SIZE: number;
    /**
     * Maximum attachment size for Infobip (bytes)
     * 30MB - matching SendGrid for consistency
     */
    readonly INFOBIP_MAX_SIZE: number;
    /**
     * Maximum total attachment size for Infobip (bytes)
     * 30MB - matching SendGrid for consistency
     */
    readonly INFOBIP_MAX_TOTAL_SIZE: number;
    /**
     * Default timeout for URL attachment fetching (milliseconds)
     */
    readonly URL_FETCH_TIMEOUT_MS: 30000;
    /**
     * Maximum number of retry attempts for failed URL fetches
     */
    readonly URL_FETCH_MAX_RETRIES: 3;
};
/**
 * Circuit Breaker Configuration
 */
export declare const CIRCUIT_BREAKER_CONFIG: {
    /**
     * Default failure threshold before opening circuit
     * Circuit opens after this many consecutive failures
     */
    readonly DEFAULT_FAILURE_THRESHOLD: 5;
    /**
     * Default timeout before attempting half-open state (milliseconds)
     * How long to wait before testing if provider has recovered
     */
    readonly DEFAULT_TIMEOUT_MS: 60000;
    /**
     * Default success threshold in half-open state
     * Number of successful requests needed to close circuit
     */
    readonly DEFAULT_SUCCESS_THRESHOLD: 2;
};
/**
 * Queue Configuration
 */
export declare const QUEUE_CONFIG: {
    /**
     * Default maximum queue size
     */
    readonly DEFAULT_MAX_SIZE: 10000;
    /**
     * Default number of concurrent workers
     */
    readonly DEFAULT_CONCURRENCY: 5;
    /**
     * Default queue processing interval (milliseconds)
     */
    readonly DEFAULT_PROCESSING_INTERVAL_MS: 100;
};
/**
 * Rate Limiting Configuration
 */
export declare const RATE_LIMIT_CONFIG: {
    /**
     * Default requests per second per provider
     */
    readonly DEFAULT_REQUESTS_PER_SECOND: 10;
    /**
     * Default burst allowance
     * Number of requests that can be sent in a burst
     */
    readonly DEFAULT_BURST_ALLOWANCE: 20;
    /**
     * Default window size for rate limiting (milliseconds)
     */
    readonly DEFAULT_WINDOW_MS: 1000;
};
/**
 * Template Configuration
 */
export declare const TEMPLATE_CONFIG: {
    /**
     * Default locale for templates
     */
    readonly DEFAULT_LOCALE: "en";
    /**
     * Fallback locale when requested locale not found
     */
    readonly FALLBACK_LOCALE: "en";
    /**
     * Template cache TTL (milliseconds)
     * How long to cache compiled templates
     */
    readonly CACHE_TTL_MS: 300000;
    /**
     * Maximum template size (bytes)
     */
    readonly MAX_TEMPLATE_SIZE: 1048576;
};
/**
 * SMS Character Limits and Encoding
 * Based on GSM-7 and UCS-2 encoding standards
 */
export declare const SMS_CONFIG: {
    /**
     * Single SMS message limit for GSM-7 encoding (standard characters)
     * Includes: A-Z, a-z, 0-9, and basic punctuation
     */
    readonly GSM7_SINGLE_MESSAGE_LIMIT: 160;
    /**
     * Multi-part SMS message segment limit for GSM-7 encoding
     * Each segment in a concatenated message is limited to 153 characters (7 chars for UDH)
     */
    readonly GSM7_MULTI_PART_SEGMENT_LIMIT: 153;
    /**
     * Single SMS message limit for UCS-2 encoding (unicode characters)
     * Used when message contains emoji, non-Latin characters, etc.
     */
    readonly UCS2_SINGLE_MESSAGE_LIMIT: 70;
    /**
     * Multi-part SMS message segment limit for UCS-2 encoding
     * Each segment in a concatenated message is limited to 67 characters
     */
    readonly UCS2_MULTI_PART_SEGMENT_LIMIT: 67;
    /**
     * Maximum number of SMS segments to allow
     * Prevents accidentally sending very expensive multi-part messages
     */
    readonly DEFAULT_MAX_SEGMENTS: 10;
    /**
     * Warning threshold (percentage of limit)
     * Emit warning when message reaches this percentage of the limit
     */
    readonly WARNING_THRESHOLD_PERCENTAGE: 90;
};
/**
 * Notification Configuration
 */
export declare const NOTIFICATION_CONFIG: {
    /**
     * Default notification priority
     */
    readonly DEFAULT_PRIORITY: "normal";
    /**
     * Maximum subject line length
     */
    readonly MAX_SUBJECT_LENGTH: 255;
    /**
     * Maximum push notification title length
     */
    readonly MAX_PUSH_TITLE_LENGTH: 100;
    /**
     * Maximum push notification body length
     */
    readonly MAX_PUSH_BODY_LENGTH: 500;
};
/**
 * Logging Configuration
 */
export declare const LOGGING_CONFIG: {
    /**
     * Default log level
     */
    readonly DEFAULT_LEVEL: "info";
    /**
     * Maximum log message size (bytes)
     * Prevents excessive log sizes
     */
    readonly MAX_LOG_SIZE: 10000;
};
/**
 * Health Check Configuration
 */
export declare const HEALTH_CHECK_CONFIG: {
    /**
     * Default health check interval (milliseconds)
     */
    readonly DEFAULT_INTERVAL_MS: 30000;
    /**
     * Default health check timeout (milliseconds)
     */
    readonly DEFAULT_TIMEOUT_MS: 5000;
    /**
     * Maximum acceptable latency (milliseconds)
     * Health check fails if latency exceeds this
     */
    readonly MAX_ACCEPTABLE_LATENCY_MS: 2000;
};
/**
 * Export all configuration as a single object for convenience
 */
export declare const NOTIFICATION_PACKAGE_CONFIG: {
    readonly RETRY: {
        /**
         * Default maximum number of retry attempts
         * Used when no specific retry count is provided
         */
        readonly DEFAULT_MAX_ATTEMPTS: 3;
        /**
         * Default initial delay between retries (milliseconds)
         * Used for exponential backoff calculation
         */
        readonly DEFAULT_INITIAL_DELAY_MS: 1000;
        /**
         * Maximum delay between retries (milliseconds)
         * Prevents exponential backoff from growing too large
         */
        readonly MAX_DELAY_MS: 30000;
        /**
         * Backoff multiplier for exponential backoff
         * Each retry delay = previous delay * multiplier
         */
        readonly BACKOFF_MULTIPLIER: 2;
    };
    readonly ATTACHMENT: {
        /**
         * Default maximum number of attachments per notification
         */
        readonly DEFAULT_MAX_ATTACHMENTS: 10;
        /**
         * Default maximum size per attachment (bytes)
         * 25MB - Common limit across providers
         */
        readonly DEFAULT_MAX_SIZE_PER_ATTACHMENT: number;
        /**
         * Default maximum total size of all attachments (bytes)
         * 25MB - Ensures we don't exceed provider limits
         */
        readonly DEFAULT_MAX_TOTAL_SIZE: number;
        /**
         * Maximum attachment size for SendGrid (bytes)
         * 30MB per SendGrid documentation
         */
        readonly SENDGRID_MAX_SIZE: number;
        /**
         * Maximum total attachment size for SendGrid (bytes)
         * 30MB per SendGrid documentation
         */
        readonly SENDGRID_MAX_TOTAL_SIZE: number;
        /**
         * Maximum attachment size for Infobip (bytes)
         * 30MB - matching SendGrid for consistency
         */
        readonly INFOBIP_MAX_SIZE: number;
        /**
         * Maximum total attachment size for Infobip (bytes)
         * 30MB - matching SendGrid for consistency
         */
        readonly INFOBIP_MAX_TOTAL_SIZE: number;
        /**
         * Default timeout for URL attachment fetching (milliseconds)
         */
        readonly URL_FETCH_TIMEOUT_MS: 30000;
        /**
         * Maximum number of retry attempts for failed URL fetches
         */
        readonly URL_FETCH_MAX_RETRIES: 3;
    };
    readonly CIRCUIT_BREAKER: {
        /**
         * Default failure threshold before opening circuit
         * Circuit opens after this many consecutive failures
         */
        readonly DEFAULT_FAILURE_THRESHOLD: 5;
        /**
         * Default timeout before attempting half-open state (milliseconds)
         * How long to wait before testing if provider has recovered
         */
        readonly DEFAULT_TIMEOUT_MS: 60000;
        /**
         * Default success threshold in half-open state
         * Number of successful requests needed to close circuit
         */
        readonly DEFAULT_SUCCESS_THRESHOLD: 2;
    };
    readonly QUEUE: {
        /**
         * Default maximum queue size
         */
        readonly DEFAULT_MAX_SIZE: 10000;
        /**
         * Default number of concurrent workers
         */
        readonly DEFAULT_CONCURRENCY: 5;
        /**
         * Default queue processing interval (milliseconds)
         */
        readonly DEFAULT_PROCESSING_INTERVAL_MS: 100;
    };
    readonly RATE_LIMIT: {
        /**
         * Default requests per second per provider
         */
        readonly DEFAULT_REQUESTS_PER_SECOND: 10;
        /**
         * Default burst allowance
         * Number of requests that can be sent in a burst
         */
        readonly DEFAULT_BURST_ALLOWANCE: 20;
        /**
         * Default window size for rate limiting (milliseconds)
         */
        readonly DEFAULT_WINDOW_MS: 1000;
    };
    readonly TEMPLATE: {
        /**
         * Default locale for templates
         */
        readonly DEFAULT_LOCALE: "en";
        /**
         * Fallback locale when requested locale not found
         */
        readonly FALLBACK_LOCALE: "en";
        /**
         * Template cache TTL (milliseconds)
         * How long to cache compiled templates
         */
        readonly CACHE_TTL_MS: 300000;
        /**
         * Maximum template size (bytes)
         */
        readonly MAX_TEMPLATE_SIZE: 1048576;
    };
    readonly SMS: {
        /**
         * Single SMS message limit for GSM-7 encoding (standard characters)
         * Includes: A-Z, a-z, 0-9, and basic punctuation
         */
        readonly GSM7_SINGLE_MESSAGE_LIMIT: 160;
        /**
         * Multi-part SMS message segment limit for GSM-7 encoding
         * Each segment in a concatenated message is limited to 153 characters (7 chars for UDH)
         */
        readonly GSM7_MULTI_PART_SEGMENT_LIMIT: 153;
        /**
         * Single SMS message limit for UCS-2 encoding (unicode characters)
         * Used when message contains emoji, non-Latin characters, etc.
         */
        readonly UCS2_SINGLE_MESSAGE_LIMIT: 70;
        /**
         * Multi-part SMS message segment limit for UCS-2 encoding
         * Each segment in a concatenated message is limited to 67 characters
         */
        readonly UCS2_MULTI_PART_SEGMENT_LIMIT: 67;
        /**
         * Maximum number of SMS segments to allow
         * Prevents accidentally sending very expensive multi-part messages
         */
        readonly DEFAULT_MAX_SEGMENTS: 10;
        /**
         * Warning threshold (percentage of limit)
         * Emit warning when message reaches this percentage of the limit
         */
        readonly WARNING_THRESHOLD_PERCENTAGE: 90;
    };
    readonly NOTIFICATION: {
        /**
         * Default notification priority
         */
        readonly DEFAULT_PRIORITY: "normal";
        /**
         * Maximum subject line length
         */
        readonly MAX_SUBJECT_LENGTH: 255;
        /**
         * Maximum push notification title length
         */
        readonly MAX_PUSH_TITLE_LENGTH: 100;
        /**
         * Maximum push notification body length
         */
        readonly MAX_PUSH_BODY_LENGTH: 500;
    };
    readonly LOGGING: {
        /**
         * Default log level
         */
        readonly DEFAULT_LEVEL: "info";
        /**
         * Maximum log message size (bytes)
         * Prevents excessive log sizes
         */
        readonly MAX_LOG_SIZE: 10000;
    };
    readonly HEALTH_CHECK: {
        /**
         * Default health check interval (milliseconds)
         */
        readonly DEFAULT_INTERVAL_MS: 30000;
        /**
         * Default health check timeout (milliseconds)
         */
        readonly DEFAULT_TIMEOUT_MS: 5000;
        /**
         * Maximum acceptable latency (milliseconds)
         * Health check fails if latency exceeds this
         */
        readonly MAX_ACCEPTABLE_LATENCY_MS: 2000;
    };
};
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