/*
 * clippr: a social bookmarking service for the AT Protocol
 * Copyright (c) 2025 clippr contributors.
 * SPDX-License-Identifier: AGPL-3.0-only
 */

import {
	CompositeDidDocumentResolver,
	DocumentNotFoundError,
	FailedDocumentResolutionError,
	HandleResolutionError,
	ImproperDidError,
	PlcDidDocumentResolver,
	UnsupportedDidMethodError,
	WebDidDocumentResolver,
} from "@atcute/identity-resolver";

// Gets a DID document from a given DID. DID method agnostic.
export async function getDidDocument(
	did: `did:plc:${string}` | `did:web:${string}`,
) {
	const docResolver = new CompositeDidDocumentResolver({
		methods: {
			plc: new PlcDidDocumentResolver(),
			web: new WebDidDocumentResolver(),
		},
	});

	let doc;
	try {
		doc = await docResolver.resolve(did);
	} catch (err) {
		if (err instanceof DocumentNotFoundError) {
			throw new Error("Document not found");
		}
		if (err instanceof UnsupportedDidMethodError) {
			throw new Error("Unsupported DID method");
		}
		if (err instanceof ImproperDidError) {
			throw new Error("Invalid DID");
		}
		if (err instanceof FailedDocumentResolutionError) {
			throw new Error("Failed document resolution");
		}
		if (err instanceof HandleResolutionError) {
			throw new Error("Unknown resolution error");
		}
	}

	return doc;
}