declare const window: any;
declare const self: any;

export class Random {
    /**
     * Returns `count` cryptographically secure random bytes
     */
    public static getBytes(count: number): Uint8Array {
        try {
            const globalObject = typeof window === 'object' ? window : self;
            const cryptoApi = typeof globalObject.crypto !== 'undefined' ? globalObject.crypto : globalObject.msCrypto;

            const out = new Uint8Array(count);
            cryptoApi.getRandomValues(out);
            return out;
        } catch {
            try {
                const crypto = require('crypto');
                return new Uint8Array([...crypto.randomBytes(count)]);
            } catch {
                throw new Error('No secure random number generator found');
            }
        }
    }
}