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

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

/**
 * Builds a GraphQL Interface type for Slice fields. It includes fields common
 * to all Slices. The resulting type can be created using Gatsby's `createTypes` action.
 */
// TODO: Move typename to Dependencies (create in `buildDependencies.ts`).
export const buildSliceInterface: RTE.ReaderTaskEither<
	Dependencies,
	never,
	gatsby.GatsbyGraphQLType
> = pipe(
	RTE.ask<Dependencies>(),
	RTE.chain((deps) =>
		buildInterfaceType({
			name: deps.globalNodeHelpers.createTypeName("SliceType"),
			fields: {
				id: "ID!",
				slice_type: "String!",
				slice_label: "String",
			},
		}),
	),
);