import { ActivitySlotInfo, CustomSlotSupplier, FixedSizeSlotSupplier, LocalActivitySlotInfo, ResourceBasedTunerOptions, SlotInfo, WorkerTuner as NativeWorkerTuner, WorkflowSlotInfo } from '@temporalio/core-bridge';
import { Duration } from '@temporalio/common/lib/time';
import { Logger } from '@temporalio/common';
export { FixedSizeSlotSupplier, ResourceBasedTunerOptions };
/**
 * Controls how slots for different task types will be handed out.
 *
 * @experimental
 */
export type WorkerTuner = ResourceBasedTuner | TunerHolder;
/**
 * This tuner allows for different slot suppliers for different slot types.
 *
 * @experimental
 */
export interface TunerHolder {
    workflowTaskSlotSupplier: SlotSupplier<WorkflowSlotInfo>;
    activityTaskSlotSupplier: SlotSupplier<ActivitySlotInfo>;
    localActivityTaskSlotSupplier: SlotSupplier<LocalActivitySlotInfo>;
}
/**
 * Controls how slots are handed out for a specific task type.
 *
 * For now, only {@link ResourceBasedSlotOptions} and {@link FixedSizeSlotSupplier} are supported,
 * but we may add support for custom tuners in the future.
 *
 * @experimental
 */
export type SlotSupplier<SI extends SlotInfo> = ResourceBasedSlotsForType | FixedSizeSlotSupplier | CustomSlotSupplier<SI>;
/**
 * Resource based slot supplier options for a specific kind of slot.
 *
 * @experimental
 */
type ResourceBasedSlotsForType = ResourceBasedSlotOptions & {
    type: 'resource-based';
    tunerOptions: ResourceBasedTunerOptions;
};
/**
 * Options for a specific slot type within a {@link ResourceBasedSlotsForType}
 *
 * @experimental
 */
export interface ResourceBasedSlotOptions {
    /**
     * Amount of slots that will be issued regardless of any other checks.
     * Defaults to 2 for workflow tasks and 1 for activity tasks.
     */
    minimumSlots?: number;
    /**
     * Maximum amount of slots permitted
     * Defaults to 1000 for workflow tasks and 2000 for activity tasks.
     */
    maximumSlots?: number;
    /**
     * Minimum time we will wait (after passing the minimum slots number) between handing out new
     * slots. Defaults to 10ms for workflow tasks and 50ms for activity tasks.
     */
    rampThrottle?: Duration;
}
/**
 * This tuner attempts to maintain certain levels of resource usage when under load. You do not
 * need more than one instance of this when using it for multiple slot types.
 *
 * @experimental
 */
export interface ResourceBasedTuner {
    /**
     * Options for the tuner
     */
    tunerOptions: ResourceBasedTunerOptions;
    /**
     * Options for workflow task slots. Defaults to a minimum of 2 slots and a maximum of 1000 slots
     * with no ramp throttle
     */
    workflowTaskSlotOptions?: ResourceBasedSlotOptions;
    /**
     * Options for activity task slots. Defaults to a minimum of 1 slots and a maximum of 2000 slots
     * with 50ms ramp throttle
     */
    activityTaskSlotOptions?: ResourceBasedSlotOptions;
    /**
     * Options for local activity task slots. Defaults to a minimum of 1 slots and a maximum of 2000
     * slots with 50ms ramp throttle
     */
    localActivityTaskSlotOptions?: ResourceBasedSlotOptions;
}
export declare function asNativeTuner(tuner: WorkerTuner, logger: Logger): NativeWorkerTuner;