export interface Monitor {
    id?: string;
    name?: string;
    type: string;
    url?: string;
    host?: string;
    port?: number;
    method?: string;
    headers?: Record<string, string>;
    body?: string;
    keyword?: string;
    jsonQuery?: string;
    expectedValue?: any;
    dnsRecordType?: string;
    timeoutMs: number;
    intervalSeconds?: number;
    pushToken?: string;
    isPaused?: boolean;
    proxyId?: string | null;
    dockerContainer?: string;
    dockerCommand?: string;
    mqttTopic?: string;
    mqttUsername?: string;
    mqttPassword?: string;
    databaseQuery?: string;
    databaseEngine?: string;
    databaseName?: string;
    databaseUsername?: string;
    databasePassword?: string;
    opensearchQuery?: string;
    opensearchUsername?: string;
    opensearchPassword?: string;
}
export interface Proxy {
    protocol: string;
    host: string;
    port: number;
    username?: string;
    password?: string;
}
export interface CheckResult {
    status: "up" | "down" | "unknown";
    message: string;
    pingMs: number | null;
    httpStatus?: number | null;
    sslExpiresAt?: Date | null;
    downTime?: string | null;
    extra?: Record<string, any>;
}
export declare function checkSslCertificate(url: string, timeoutMs?: number): Promise<Date | null>;
/**
 * Check HTTP/HTTPS endpoint
 */
export declare function checkHttp(monitor: Monitor, proxy?: Proxy | null): Promise<CheckResult & {
    sslExpiresAt?: Date | null;
}>;
/**
 * Check HTTP endpoint for keyword presence
 */
export declare function checkKeyword(monitor: Monitor, proxy?: Proxy | null): Promise<CheckResult>;
/**
 * Check JSON endpoint with JSONPath query
 */
export declare function checkJsonQuery(monitor: Monitor, proxy?: Proxy | null): Promise<CheckResult>;
/**
 * Check TCP port connectivity
 */
export declare function checkTcp(monitor: Monitor): Promise<CheckResult>;
/**
 * Check DNS resolution
 */
export declare function checkDns(monitor: Monitor): Promise<CheckResult>;
/**
 * Check host reachability using ping
 */
export declare function checkPing(monitor: Monitor): Promise<CheckResult>;
/**
 * Check WebSocket connectivity
 */
export declare function checkWebsocket(monitor: Monitor): Promise<CheckResult>;
/**
 * Check Docker container status and health
 */
export declare function checkDocker(monitor: Monitor): Promise<CheckResult>;
/**
 * Check MQTT status
 */
export declare function checkMqtt(monitor: Monitor): Promise<CheckResult>;
/**
 * Placeholder for not implemented monitor types
 */
export declare function checkNotImplemented(monitor: Monitor): Promise<CheckResult>;
export declare function checkDatabase(monitor: Monitor): Promise<CheckResult>;
/**
 * Check OpenSearch cluster health.
 * Auth is supplied via separate username/password fields (Basic Auth header).
 * Optionally hits a custom path for index-level checks.
 */
export declare function checkOpenSearch(monitor: Monitor): Promise<CheckResult>;
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