import { CommandInterface, Emulators } from "emulators";
import { Layers } from "../dom/layers";
import { makeCache } from "./cache";

const cacheName = "emulators-ui-saves";
const cachePromise = makeCache(cacheName, {
    onErr: console.error,
});


export function save(key: string,
                     layers: Layers,
                     ci: CommandInterface,
                     emulators: Emulators) {
    layers.setOnSave(async () => {
        const cache = await cachePromise;
        const updated = await ci.persist();
        return cache.put(key, updated.buffer);
    });
}

export async function load(key: string,
                           emulators: Emulators) {
    const cache = await cachePromise;
    return cache.get(key).then((buffer) => new Uint8Array(buffer as ArrayBuffer));
}