// Copyright (c) Microsoft Corporation. All rights reserved.

// Licensed under the MIT License.

'use strict';

import * as crypto from 'crypto';

import { injectable } from 'inversify';

import { IRandom } from '../types';

function getRandom(): number {

let num: number = 0;

const buf: Buffer = crypto.randomBytes(2);

num = (buf.readUInt8(0) << 8) + buf.readUInt8(1);

const maxValue: number = Math.pow(16, 4) - 1;

return num / maxValue;

}

function getRandomBetween(min: number = 0, max: number = 10): number {

const randomVal: number = getRandom();

return min + randomVal * (max - min);

}

@injectable()

export class Random implements IRandom {

public getRandomInt(min: number = 0, max: number = 10): number {

return getRandomBetween(min, max);

}

}