import * as gatsby from "gatsby";
import * as RTE from "fp-ts/ReaderTaskEither";
import { pipe } from "fp-ts/function";

import { Dependencies } from "../types";
import { buildObjectType } from "../lib/buildObjectType";

/**
 * Builds a GraphQL type used to map a Custom Type's fields to an Prismic field
 * type enum value. The resulting type can be created using Gatsby's
 * `createTypes` action.
 */
export const buildTypePathType: RTE.ReaderTaskEither<
	Dependencies,
	never,
	gatsby.GatsbyGraphQLType
> = pipe(
	RTE.ask<Dependencies>(),
	RTE.chain((deps) =>
		buildObjectType({
			name: deps.nodeHelpers.createTypeName("TypePathType"),
			fields: {
				kind: "String!",
				path: "[String!]!",
				type: "String!",
			},
			interfaces: ["Node"],
			extensions: { infer: false },
		}),
	),
);