frontend/src/lib/util.ts

import { CredentialManager, XRPC } from '@atcute/client';
import { getPdsEndpoint } from '@atcute/identity';
import {
	AtprotoWebDidDocumentResolver,
	CompositeDidDocumentResolver,
	PlcDidDocumentResolver,
	XrpcHandleResolver
} from '@atcute/identity-resolver';

import type { At } from '@atcute/client/lexicons';

const didDocumentResolver = new CompositeDidDocumentResolver({
	methods: {
		plc: new PlcDidDocumentResolver(),
		web: new AtprotoWebDidDocumentResolver()
	}
});

const handleResolver = new XrpcHandleResolver({
	serviceUrl: 'https://public.api.bsky.app'
});

async function resolvePDS(did: string) {
	const doc = await didDocumentResolver.resolve(did as `did:plc:${string}` | `did:web:${string}`);
	const pds = getPdsEndpoint(doc);
	return pds;
}

export async function resolveHandle(handle: string) {
	if (!handle.includes('.')) {
		throw new Error(`Invalid DID: ${handle}`);
	}
	return await handleResolver.resolve(handle as `${string}.${string}`);
}

export async function createRPC(did: string) {
	if (!did.startsWith('did:')) did = await resolveHandle(did);

	const pds = await resolvePDS(did);
	if (!pds) {
		throw new Error(`Failed to resolve PDS for DID: ${did}`);
	}

	const manager = new CredentialManager({ service: pds });
	const rpc = new XRPC({ handler: manager });

	return rpc;
}

export async function getSessions(rpc: XRPC, did: string) {
	const {
		data: { records }
	} = await rpc.get('com.atproto.repo.listRecords', {
		params: {
			repo: did,
			collection: 'me.woach.feed.session'
		}
	});
	return records;
}

export async function getActivity(rpc: XRPC, did: string) {
	const {
		data: { records }
	} = await rpc.get('com.atproto.repo.listRecords', {
		params: {
			repo: did,
			collection: 'me.woach.feed.activity'
		}
	});
	return records;
}

export async function resolveSession(rpc: XRPC, uri: At.Uri) {
	const repo = uri.split('at://')[1].split('/')[0];
	const rkey = uri.split('/')[4];
	const {
		data: { value }
	} = await rpc.get('com.atproto.repo.getRecord', {
		params: {
			repo,
			rkey,
			collection: 'me.woach.feed.session'
		}
	});
	return value;
}

export async function resolveMedia(rpc: XRPC, uri: At.Uri) {
	const repo = uri.split('at://')[1].split('/')[0];
	const rkey = uri.split('/')[4];
	const {
		data: { value }
	} = await rpc.get('com.atproto.repo.getRecord', {
		params: {
			repo,
			rkey,
			collection: 'me.woach.content.anilist'
		}
	});
	return value;
}