import * as gatsby from "gatsby";
import * as imgixGatsby from "@imgix/gatsby/dist/pluginHelpers";
import * as RTE from "fp-ts/ReaderTaskEither";
import * as A from "fp-ts/Array";
import { pipe } from "fp-ts/function";

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

/**
 * Builds a list of Imgix GraphQL types used by Image Custom Type fields. The
 * resulting types can be created using Gatsby's `createTypes` action.
 */
// TODO: Move typename to Dependencies (create in `buildDependencies.ts`).
export const buildImgixImageTypes: RTE.ReaderTaskEither<
	Dependencies,
	never,
	gatsby.GatsbyGraphQLType[]
> = pipe(
	RTE.ask<Dependencies>(),
	RTE.bind("imgixTypes", (scope) =>
		RTE.right(
			// IMPORTANT: These options need to be kept in sync with the options at
			// packages/gatsby-source-prismic/src/builders/buildImageBaseFieldConfigMap.ts
			imgixGatsby.createImgixGatsbyTypes({
				cache: scope.cache,
				resolveUrl: () => "", // Doesn't matter
				namespace: "Imgix",
			}),
		),
	),
	RTE.bind("objectTypes", (scope) =>
		RTE.right(
			pipe(scope.imgixTypes.types, A.map(scope.schema.buildObjectType)),
		),
	),
	RTE.bind("enumTypes", (scope) =>
		RTE.right(
			pipe(scope.imgixTypes.enumTypes, A.map(scope.schema.buildEnumType)),
		),
	),
	RTE.bind("inputTypes", (scope) =>
		RTE.right(
			pipe(
				scope.imgixTypes.inputTypes,
				A.map(scope.schema.buildInputObjectType),
			),
		),
	),
	RTE.map((scope) => [
		...scope.objectTypes,
		...scope.enumTypes,
		...scope.inputTypes,
	]),
);