[CmdletBinding()]
param (
    
    [string]
    $Identity,
    [string]
    $Server,
    [string]
    $ProjectName,
    [string]
    $Type = "RO"
)

$User = $null
$Group = $null


if(!$PSBoundParameters.ContainsKey("ProjectName")){
    throw "ProjectName Parameter not specified, aborting"
    return
} 

if(!$PSBoundParameters.ContainsKey("Identity")){
    throw "Identity Parameter not specified, aborting"
    return
} 

if($PSBoundParameters.ContainsKey("Server")){
    $User = Get-ADUser -Server $Server -Identity $Identity
} else {
    $User = Get-ADUser -Identity $Identity
}

if($null -eq $User){
    throw "Didn't find the user, aborting"
    return
}

if($PSBoundParameters.ContainsKey("Server")){
    $Group = . .\GetProjects.ps1 -Server $Server
} else {
    $Group = . .\GetProjects.ps1
}

if($null -eq $Group){
    throw "Can't find Project, aborting"
    return
}

$targeGroup =$null

if($PSBoundParameters.ContainsKey("Server")){
    $targeGroup = . .\GetRoles.ps1 -Server $Server -ProjectName $ProjectName | Where-Object Name -Match $Type
} else {
    $targeGroup = . .\GetRoles.ps1 -ProjectName $ProjectName | Where-Object Name -Match $Type
}

if($null -eq $Group){
    throw "Filter for Type was empty, aborting"
    return
}

if($PSBoundParameters.ContainsKey("Server")){
    Add-ADGroupMember -Identity $targeGroup -Members $Identity -Server $Server
} else {
    Add-ADGroupMember -Identity $targeGroup -Members $Identity
}