function Install-MSI
{
    Param
    (
        [String]$MsiUrl,
        [String]$MsiName
    )

    $exitCode = -1

    try
    {
        Write-Host "Downloading $MsiName..."
        $FilePath = "${env:Temp}\$MsiName"

        Invoke-WebRequest -Uri $MsiUrl -OutFile $FilePath

        $Arguments = ('/i', $FilePath, '/QN', '/norestart' )

        Write-Host "Starting Install $MsiName..."
        $process = Start-Process -FilePath msiexec.exe -ArgumentList $Arguments -Wait -PassThru
        $exitCode = $process.ExitCode

        if ($exitCode -eq 0 -or $exitCode -eq 3010)
        {
            Write-Host -Object 'Installation successful'
            return $exitCode
        }
        else
        {
            Write-Host -Object "Non zero exit code returned by the installation process : $exitCode."
            exit $exitCode
        }
    }
    catch
    {
        Write-Host -Object "Failed to install the MSI $MsiName"
        Write-Host -Object $_.Exception.Message
        exit -1
    }
}


function Install-EXE
{
    Param
    (
        [String]$Url,
        [String]$Name,
        [String[]]$ArgumentList
    )

    $exitCode = -1

    try
    {
        Write-Host "Downloading $Name..."
        $FilePath = "${env:Temp}\$Name"

        Invoke-WebRequest -Uri $Url -OutFile $FilePath

        Write-Host "Starting Install $Name..."
        $process = Start-Process -FilePath $FilePath -ArgumentList $ArgumentList -Wait -PassThru
        $exitCode = $process.ExitCode

        if ($exitCode -eq 0 -or $exitCode -eq 3010)
        {
            Write-Host -Object 'Installation successful'
            return $exitCode
        }
        else
        {
            Write-Host -Object "Non zero exit code returned by the installation process : $exitCode."
            return $exitCode
        }
    }
    catch
    {
        Write-Host -Object "Failed to install the Executable $Name"
        Write-Host -Object $_.Exception.Message
        return -1
    }
}

function Stop-SvcWithErrHandling
<#
.DESCRIPTION
Function for stopping the Windows Service with error handling

.AUTHOR
Andrey Mishechkin v-andmis@microsoft.com

.PARAMETER -ServiceName
The name of stopping service

.PARAMETER -StopOnError
Switch for stopping the script and exit from PowerShell if one service is absent
#>
{
    param (
        [Parameter(Mandatory, ValueFromPipeLine = $true)] [string] $ServiceName,
        [Parameter()] [switch] $StopOnError
    )

    Process {
        $Service = Get-Service $ServiceName -ErrorAction SilentlyContinue
        if (-not $Service) {
            Write-Warning "[!] Service [$ServiceName] is not found";
            if ($StopOnError) {
                exit 1;
            }
        }
        else {
            Write-Host "Try to stop service [$ServiceName]";
            try {
                Stop-Service -Name $ServiceName -Force;
                $Service.WaitForStatus("Stopped", "00:01:00");
                Write-Host "Service [$ServiceName] has been stopped successfuly";
            }
            catch {
                Write-Error "[!] Failed to stop service [$ServiceName] with error:"
                $_ | Out-String | Write-Error;
            }
        }
    }
}

function Set-SvcWithErrHandling
<#
.DESCRIPTION
Function for setting the Windows Service parameter with error handling

.AUTHOR
Andrey Mishechkin v-andmis@microsoft.com

.PARAMETER -ServiceName
The name of stopping service

.PARAMETER -Arguments
Hashtable for service arguments
#>
{

    param (
        [Parameter(Mandatory, ValueFromPipeLine = $true)] [string] $ServiceName,
        [Parameter(Mandatory)] [hashtable] $Arguments
    )

    Process {
        $Service = Get-Service $ServiceName -ErrorAction SilentlyContinue
        if (-not $Service) {
            Write-Warning "[!] Service [$ServiceName] is not found";
        }
        try {
           Set-Service $ServiceName @Arguments;
        }
        catch {
            Write-Error "[!] Failed to set service [$ServiceName] arguments with error:"
            $_ | Out-String | Write-Error;
        }
    }
}

function Get-VS19ExtensionVersion
{
    param (
        [string] [Parameter(Mandatory=$true)] $packageName
    )

    $vsProgramData = Get-Item -Path "C:\ProgramData\Microsoft\VisualStudio\Packages\_Instances"
    $instanceFolders = Get-ChildItem -Path $vsProgramData.FullName

    if($instanceFolders -is [array])
    {
        Write-Host "More than one instance installed"
        exit 1
    }

    $stateContent = Get-Content -Path ($instanceFolders.FullName + '\state.packages.json')
    $state = $stateContent | ConvertFrom-Json
    $packageVersion = ($state.packages | Where-Object { $_.id -eq $packageName }).version

    if (!$packageVersion)
    {
        Write-Host "installed package $packageName for Visual Studio 2019 was not found"
        exit 1
    }

    return $packageVersion
}