// Copyright Epic Games, Inc. All Rights Reserved.

export class MathUtils {
    /**
     * formats Bytes coming in for video stats
     * @param bytes number to convert
     * @param decimals number of decimal places
     */
    static formatBytes(bytes: number, decimals: number): string {
        if (bytes === 0) {
            return '0';
        }

        const factor = 1024;
        const dm = decimals < 0 ? 0 : decimals;
        const sizes = [
            'Bytes',
            'KiB',
            'MiB',
            'GiB',
            'TiB',
            'PiB',
            'EiB',
            'ZiB',
            'YiB'
        ];

        const i = Math.floor(Math.log(bytes) / Math.log(factor));

        return (
            parseFloat((bytes / Math.pow(factor, i)).toFixed(dm)) +
            ' ' +
            sizes[i]
        );
    }
}