// TODO this is duplicated in tevm/utils
import type { Hex } from '@tevm/utils'

export type JsonSerializable =
	| bigint
	| string
	| number
	| boolean
	| null
	| JsonSerializableArray
	| JsonSerializableObject
	| JsonSerializableSet
	| (Error & { code: number | string })
export type JsonSerializableArray = ReadonlyArray<JsonSerializable>
export type JsonSerializableObject = { [key: string]: JsonSerializable }
export type JsonSerializableSet<T extends bigint | string | number | boolean = bigint | string | number | boolean> =
	Set<T>

export type BigIntToHex<T> = T extends bigint ? Hex : T
export type SetToHex<T> = T extends Set<any> ? Hex : T

export type SerializeToJson<T> = T extends Error & { code: infer TCode }
	? { code: TCode; message: T['message'] }
	: T extends JsonSerializableSet<infer S>
		? ReadonlyArray<S>
		: T extends JsonSerializableObject
			? { [P in keyof T]: SerializeToJson<T[P]> }
			: T extends JsonSerializableArray
				? SerializeToJson<T[number]>[]
				: BigIntToHex<SetToHex<T>>