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";

import { buildImageBaseFieldConfigMap } from "./buildImageBaseFieldConfigMap";

/**
 * Builds a GraphQL type used by an Image field's thumbnails. The resulting type
 * can be created using Gatsby's `createTypes` action.
 */
// TODO: Move typename to Dependencies (create in `buildDependencies.ts`).
export const buildImageThumbnailType: RTE.ReaderTaskEither<
	Dependencies,
	never,
	gatsby.GatsbyGraphQLType
> = pipe(
	RTE.ask<Dependencies>(),
	RTE.bind("imageFields", () => buildImageBaseFieldConfigMap),
	RTE.chain((scope) =>
		buildObjectType({
			name: scope.nodeHelpers.createTypeName("ImageThumbnailType"),
			fields: scope.imageFields,
		}),
	),
);