import { $i } from "@/account";
import { api } from "@/os";
import type { Theme } from "./scripts/theme";

const lsCacheKey = $i ? `themes:${$i.id}` : "";

export function getThemes(): Theme[] {
	return JSON.parse(localStorage.getItem(lsCacheKey) || "[]");
}

export async function fetchThemes(): Promise<void> {
	if ($i == null) return;

	try {
		const themes = await api("i/registry/get", {
			scope: ["client"],
			key: "themes",
		});
		localStorage.setItem(lsCacheKey, JSON.stringify(themes));
	} catch (err) {
		if (err.code === "NO_SUCH_KEY") return;
		throw err;
	}
}

export async function addTheme(theme: Theme): Promise<void> {
	await fetchThemes();
	const themes = getThemes().concat(theme);
	await api("i/registry/set", {
		scope: ["client"],
		key: "themes",
		value: themes,
	});
	localStorage.setItem(lsCacheKey, JSON.stringify(themes));
}

export async function removeTheme(theme: Theme): Promise<void> {
	const themes = getThemes().filter((t) => t.id !== theme.id);
	await api("i/registry/set", {
		scope: ["client"],
		key: "themes",
		value: themes,
	});
	localStorage.setItem(lsCacheKey, JSON.stringify(themes));
}