import * as Optics from "monocle-ts";
import * as Traversal from "monocle-ts/Traversal";
import * as Array from "fp-ts/Array";

import { Document, File, OfficeFolder } from "le-coffre-resources/dist/Notary";

/**
 * Lenses
 */
export const folderDocumentsLens = Optics.Lens.fromNullableProp<OfficeFolder>()("documents", []);
export const documentFilesLens = Optics.Lens.fromNullableProp<Document>()("files", []);
export const fileHashLens = Optics.Lens.fromProp<File>()("hash");
export const fileUidLens = Optics.Lens.fromProp<File>()("uid");

/**
 * Traversals
 */
export const documentsTraversal = Optics.fromTraversable(Array.Traversable)<Document>();
export const filesTraversal = Optics.fromTraversable(Array.Traversable)<File>();

export const folderFilesTraversal = folderDocumentsLens
	.composeTraversal(documentsTraversal)
	.composeLens(documentFilesLens)
	.composeTraversal(filesTraversal);

export const folderHashesTraversal = folderFilesTraversal.composeLens(fileHashLens);
export const folderFilesUidTraversal = folderFilesTraversal.composeLens(fileUidLens);

/**
 * Getters
 */
export const getFolderFiles = (folder: OfficeFolder) => Traversal.getAll(folder)(folderFilesTraversal);
export const getFolderHashes = (folder: OfficeFolder) => Traversal.getAll(folder)(folderHashesTraversal);
export const getFolderFilesUid = (folder: OfficeFolder) => Traversal.getAll(folder)(folderFilesUidTraversal);