export async function sha256Hex(input: string): Promise<string> {
	const bytes = new TextEncoder().encode(input);
	const digest = await crypto.subtle.digest("SHA-256", bytes);
	return [...new Uint8Array(digest)]
		.map((b) => b.toString(16).padStart(2, "0"))
		.join("");
}

export async function shortHash(input: string): Promise<string> {
	return (await sha256Hex(input)).slice(0, 16);
}

/** Deterministic JSON with sorted keys, so hashing is stable regardless of key order. */
export function stableStringify(value: unknown): string {
	if (value === null || typeof value !== "object") return JSON.stringify(value) ?? "null";
	if (Array.isArray(value)) return `[${value.map(stableStringify).join(",")}]`;
	const obj = value as Record<string, unknown>;
	return `{${Object.keys(obj)
		.sort()
		.map((k) => `${JSON.stringify(k)}:${stableStringify(obj[k])}`)
		.join(",")}}`;
}