import { type HealthCheckContract, type HealthCheckReport } from './types.ts';
/**
 * The HealthChecks class acts as a repository and a runner to register and execute
 * health checks
 *
 * @example
 * ```typescript
 * const healthChecks = new HealthChecks()
 *
 * healthChecks.register([
 *   new DiskSpaceCheck().warnWhenExceeds(70).failWhenExceeds(85),
 *   new MemoryHeapCheck().warnWhenExceeds('200 mb').failWhenExceeds('500 mb')
 * ])
 *
 * const report = await healthChecks.run()
 * console.log(report.isHealthy) // true or false
 * ```
 */
export declare class HealthChecks {
    #private;
    /**
     * Registers health checks. Any existing health checks will be
     * removed during the register method call
     *
     * @param checks - Array of health checks to register
     *
     * @example
     * ```typescript
     * const healthChecks = new HealthChecks()
     * healthChecks.register([
     *   new DiskSpaceCheck(),
     *   new MemoryHeapCheck()
     * ])
     * ```
     */
    register(checks: HealthCheckContract[]): this;
    /**
     * Appends a new set of health checks to the existing ones
     *
     * @param checks - Array of health checks to append
     *
     * @example
     * ```typescript
     * const healthChecks = new HealthChecks()
     * healthChecks.register([new DiskSpaceCheck()])
     * healthChecks.append([new MemoryHeapCheck()]) // Adds to existing checks
     * ```
     */
    append(checks: HealthCheckContract[]): this;
    /**
     * Executes all the checks in parallel and returns the
     * health check report
     *
     * @example
     * ```typescript
     * const healthChecks = new HealthChecks()
     * const report = await healthChecks.run()
     *
     * console.log(report.isHealthy) // true or false
     * console.log(report.status) // 'ok' | 'warning' | 'error'
     * console.log(report.checks) // Array of check results
     * ```
     */
    run(): Promise<HealthCheckReport>;
}