import { XyoDomainPayload, XyoDomainSchema } from '@xyo-network/domain-payload-plugin'
import { Payload, PayloadSchema } from '@xyo-network/payload-model'
import { XyoSchemaPayload, XyoSchemaSchema } from '@xyo-network/schema-payload-plugin'

/**
 * Used in conjunction with schema validation to support compile time type assertion
 * for known schema types.
 */
export type NarrowPayload<T extends Payload = Payload> = ((x: Payload) => x is T) | undefined

/**
 * Used to map known schemas (byt their string name) to the validators which assert their types
 */
export interface XyoSchemaNameToValidatorMap {
  [PayloadSchema]: NarrowPayload<Payload>
  [XyoDomainSchema]: NarrowPayload<XyoDomainPayload>
  [XyoSchemaSchema]: NarrowPayload<XyoSchemaPayload>
}