// src/cync/token-store.ts
import { promises as fs } from 'node:fs';
import * as path from 'node:path';

export interface CyncTokenData {
	userId: string;
	accessToken: string;
	refreshToken?: string;
	expiresAt?: number;
	authorize?: string;
	lanLoginCode?: string;
}

/**
 * Simple JSON token store under the Homebridge storage path.
 *
 * Files are stored at:
 *   <storagePath>/homebridge-cync-app/cync-tokens.json
 */
export class CyncTokenStore {
	private readonly dirPath: string;
	private readonly filePath: string;

	public constructor(storagePath: string) {
		this.dirPath = path.join(storagePath, 'homebridge-cync-app');
		this.filePath = path.join(this.dirPath, 'cync-tokens.json');
	}

	public async load(): Promise<CyncTokenData | null> {
		try {
			const raw = await fs.readFile(this.filePath, 'utf8');
			const data = JSON.parse(raw) as CyncTokenData;
			return data;
		} catch {
			return null;
		}
	}

	public async save(data: CyncTokenData): Promise<void> {
		const json = JSON.stringify(data, null, 2);

		// Ensure directory exists before writing
		await fs.mkdir(this.dirPath, { recursive: true });
		await fs.writeFile(this.filePath, json, 'utf8');
	}

	public async clear(): Promise<void> {
		try {
			await fs.unlink(this.filePath);
		} catch {
			// ignore if missing or already removed
		}
	}
}