export interface Credentials {
	server: string;
	authMode?: "token" | "password" | "apikey";
	username?: string;
	token?: string;
	salt?: string;
	password?: string;
	apiKey?: string;
}

const credentialsStorageKey = "tinysub_credentials";

export const getStoredCredentials = (): Credentials | null => {
	if (typeof localStorage === "undefined") return null;

	const raw = localStorage.getItem(credentialsStorageKey);
	if (!raw) return null;

	try {
		const parsed: unknown = JSON.parse(raw);
		return parsed &&
			typeof parsed === "object" &&
			"server" in parsed &&
			typeof parsed.server === "string" &&
			parsed.server
			? (parsed as Credentials)
			: null;
	} catch (err) {
		console.error("failed to parse stored credentials:", err);
		return null;
	}
};