import { readFile, writeFile } from "fs/promises";
import type { AppleMusicPlaybackEvent } from "../types";

const cacheFilePath = "cache/progress.json";

export type CacheRecord = {
    songName: string;
    timestamp: string;
};

export async function getCache(): Promise<CacheRecord[]> {
    try {
        const data = await readFile(cacheFilePath, "utf-8");
        return JSON.parse(data);
    } catch (error) {
        return [];
    }
}

export async function updateCache(
    event: AppleMusicPlaybackEvent,
): Promise<void> {
    const cache = await getCache();
    cache.push({
        songName: event["Song Name"],
        timestamp: event["Event End Timestamp"],
    });
    await writeFile(cacheFilePath, JSON.stringify(cache, null, 2));
}