import { readFile, writeFile } from 'node:fs/promises';
import type { AssetState } from './assets.js';

export interface PostState {
	ghostSlug: string;
	ghostTitle: string;
	documentUri?: string;
	documentCid?: string;
	articleUri?: string;
	articleCid?: string;
}

export interface AppState {
	publicationAtUri?: string;
	accountDid?: string;
	assets?: Record<string, AssetState>;
	posts: Record<string, PostState>;
}

export async function loadState(path: string): Promise<AppState> {
	try {
		const raw = await readFile(path, 'utf-8');
		const parsed = JSON.parse(raw) as AppState;
		return Object.assign({ posts: {} }, parsed);
	} catch (err: any) {
		if (err?.code === 'ENOENT') {
			return { posts: {} };
		}
		throw err;
	}
}

export async function saveState(path: string, state: AppState): Promise<void> {
	await writeFile(path, JSON.stringify(state, null, 2), 'utf-8');
}