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

import { buildInferredNodeType } from "../lib/buildInferredNodeType";
import { createType } from "../lib/createType";
import { getTypeName } from "../lib/getTypeName";

import { Dependencies, FieldConfigCreator } from "../types";

/**
 * Builds a GraphQL field configuration object for an Integration Fields Custom
 * Type field. It uses the `@link` extension to connect data to the field. Data
 * for each Integration Fields field is created as a separate node to allow
 * Gatsby to infer the fields and types. The resulting configuration object can
 * be used in a GraphQL type.
 *
 * This function registers a typepath for the field.
 *
 * @param path - Path to the field.
 *
 * @returns GraphQL field configuration object.
 */
export const buildIntegrationFieldConfig: FieldConfigCreator = (
	path: string[],
) =>
	pipe(
		RTE.ask<Dependencies>(),
		RTE.chain(() => buildInferredNodeType([...path, "IntegrationType"])),
		RTE.chainFirst(createType),
		RTE.map(getTypeName),
		RTE.map((type) => ({
			type,
			extensions: { link: {} },
		})),
	);