import os
import subprocess


def get_hardware_info():
    if os.name == 'nt':  # windows
        os_command = (
            "powershell -Command \""
            "Get-CimInstance -ClassName Win32_Processor | Select-Object -ExpandProperty Name | Write-Output; "
            "Get-CimInstance -ClassName Win32_VideoController | Select-Object -ExpandProperty Name | Write-Output; "
            "Get-CimInstance -ClassName Win32_OperatingSystem | Select-Object -ExpandProperty TotalVisibleMemorySize | Write-Output; "
            "(Get-Disk | Where-Object {$_.IsSystem -eq $true}).SerialNumber"
            "\""
        )
    else:
        os_command = (
            "lscpu | grep 'Model name:' | cut -d':' -f2 && "
            "lspci | grep VGA | cut -d':' -f3 && "
            "free -k | awk '/^Mem:/ {print $2}' && " 
            "cat /sys/block/sda/device/vpd_pg80 2>/dev/null || cat /sys/block/sda/device/serial 2>/dev/null"
        )

    result = subprocess.check_output(os_command, shell=True).decode('utf-8', errors='ignore')
    lines = [line.replace("  ", " ").replace("Name=", "").strip('\x00\x14 \t\n\r\v\f') for line in result.splitlines() if line.strip()]

    cpu = lines[0]
    gpu = lines[1]

    # could be multiple gpus, that's why take memory and drive from the 2 last lines
    len_lines = len(lines)
    memory = lines[len_lines - 2].replace("TotalVisibleMemorySize=", "")
    drive_serial = lines[len_lines - 1]

    res = f'CPU: {cpu}. GPU: {gpu}. Memory: {memory}. DriveSerial: {drive_serial}'
    return res
