/**
 * Browser compatibility utilities
 *
 * Polyfills and wrappers for APIs that aren't available in all browsers.
 * Import individual helpers as needed.
 */

/**
 * crypto.randomUUID() polyfill for Safari <15.4, Firefox <95
 */
export function randomUUID(): string {
	if (typeof crypto !== "undefined" && typeof crypto.randomUUID === "function") {
		return crypto.randomUUID();
	}
	// RFC 4122 v4 UUID fallback using crypto.getRandomValues
	const bytes = crypto.getRandomValues(new Uint8Array(16));
	bytes[6] = (bytes[6] & 0x0f) | 0x40; // version 4
	bytes[8] = (bytes[8] & 0x3f) | 0x80; // variant 10
	const hex = Array.from(bytes, (b) => b.toString(16).padStart(2, "0")).join("");
	return `${hex.slice(0, 8)}-${hex.slice(8, 12)}-${hex.slice(12, 16)}-${hex.slice(16, 20)}-${hex.slice(20)}`;
}

/**
 * AbortSignal.timeout() polyfill for Safari <17, Firefox <122
 *
 * Returns an AbortSignal that aborts after the given milliseconds.
 */
export function timeoutSignal(ms: number): AbortSignal {
	if (typeof AbortSignal.timeout === "function") {
		return AbortSignal.timeout(ms);
	}
	const controller = new AbortController();
	setTimeout(() => controller.abort(new DOMException("The operation was aborted due to timeout", "TimeoutError")), ms);
	return controller.signal;
}
