$RepositoryLocation = Read-Host -Prompt "Please enter the location of the repository"
#This is the location of the PS modules repository. Our official repository can be found here, "https://repo.corasequence.digital/repository/CoraSeQuencePowerShell/". If you are using your own repository then use its URL here.
$RepositoryName = Read-Host -Prompt "Please enter a name for the repository"
#By default, the repository name should be Cora
$KeepLatestOnly = $true
$Credentials = Get-Credential -Message "Please enter credentials for accessing the repository (Click cancel if credentials are not required)"
if ($Credentials)
{
    $CoraSeQuencePSRepository = @{Name=$RepositoryName; SourceLocation=$RepositoryLocation; InstallationPolicy="Trusted"; Credential=$Credentials}
}
else
{
    $CoraSeQuencePSRepository = @{Name=$RepositoryName; SourceLocation=$RepositoryLocation; InstallationPolicy="Trusted"}
}

Write-Host -Object "Installing NuGet PackageProvider"
$webclient=New-Object System.Net.WebClient
$webclient.Proxy.Credentials = [System.Net.CredentialCache]::DefaultNetworkCredentials
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12 
Install-PackageProvider -Name NuGet -RequiredVersion 2.8.5.208 -Verbose
Install-Module PowerShellGet -RequiredVersion 2.2.4 -SkipPublisherCheck -Verbose -Force
Write-Host -Object "Removing existing repository and package source"
Get-PSRepository -Verbose | Where-Object {$_.Name -eq $RepositoryName -or $_.SourceLocation -eq $RepositoryLocation} | Unregister-PSRepository -Verbose
Get-PackageSource -Verbose | Where-Object {$_.Source -eq $RepositoryName -or $_.Location -eq $RepositoryLocation} | Unregister-PackageSource -Verbose
Write-Host -Object "Registering repository and package source"
if ($Credentials)
{
    Register-PackageSource -Name $RepositoryName -Location $RepositoryLocation -Credential $Credentials -ProviderName NuGet -Trusted
}
else
{
    Register-PackageSource -Name $RepositoryName -Location $RepositoryLocation -ProviderName NuGet -Trusted
}
Register-PSRepository @CoraSeQuencePSRepository

Write-Host -Object "Installing modules"
if ($Credentials)
{
    Find-Module -Name * -Repository $RepositoryName -Credential $Credentials -Verbose | Install-Module -Credential $Credentials -Verbose
}
else
{
    Find-Module -Name * -Repository $RepositoryName -Verbose | Install-Module -Verbose
}

if ($KeepLatestOnly)
{
    Write-Host -Object "Getting all installed versions"
    $InstalledModules = Get-InstalledModule | Where-Object { $_.Repository -eq  $RepositoryName}
    foreach ($InstalledModule in $InstalledModules)
    {
        $Latest = Get-InstalledModule -Name $InstalledModule.Name
        #Deleting the directory because Uninstall-Module and Update-Module do not handle dependencies and old versions 
        Write-Host -Object "Deleting old versions"
        Get-InstalledModule -Name $InstalledModule.Name -AllVersions | Where-Object {$_.Version -ne $Latest.Version} | Select-Object -Property InstalledLocation -ExpandProperty InstalledLocation | Remove-Item -Recurse -Force -Verbose
    }
}