else statement issue powershell script - windows

Question

Everything in this script I wrote works with if and ifelse statements but not the else statements. Could someone please review the following and help me figure out why? The desired outcome is if I type aconda, a conda environment launches, aconda -d deactivates conda and alters the path, aconda -a activates conda and alters the path . Is there a way to specify the outcome of no parameter?
function aconda {
param(
[Alias('d')]
[Parameter(ParameterSetName='Deactivate')]
[switch] $Deactivate
,
[Alias('a')]
[Parameter(ParameterSetName='Activate')]
[switch] $Activate
,
[Alias("h")]
[Parameter(ParameterSetName='help')]
[switch] $help
)
if ($Activate) {
$Environment = [System.Environment]::GetEnvironmentVariable("Path", "Machine")
foreach ($path in ($Environment).Split(";"))
{
if ($path -like "C:\Program Files\Python310\Scripts\")
{
$Environment = $Environment.Replace($Path ,"")
}
if ($path -like "C:\Program Files\Python310\")
{
$Environment = $Environment.Replace($Path ,"")
}
}
$env:PATH = $Environment
. C:\Anaconda3\shell\condabin\conda-hook.ps1 ; conda activate 'C:\Anaconda3'
}
elseif ($Deactivate)
{
. C:\Anaconda3\shell\condabin\conda-hook.ps1 ; conda deactivate 'C:\Anaconda3'
$env:PATH = [Environment]::GetEnvironmentVariable('Path', 'Machine'),
[Environment]::GetEnvironmentVariable('Path', 'User') -join ';'
}
elseif ($help)
{ Write-Output "
-a activate conda
-d deactivate conda
-? Help. This is the same as not typing any options"
}
else { . C:\Anaconda3\shell\condabin\conda-hook.ps1 ; conda deactivate 'C:\Anaconda3'
}
}
EDIT:
This works, but still ignores the else statement:
function aconda {
[CmdletBinding(DefaultParameterSetName = 'Activate')]
param(
[Alias('d')]
[Parameter(ParameterSetName='Deactivate')]
[switch] $Deactivate
,
[Alias('a')]
[Parameter(ParameterSetName='Activate')]
[switch] $Activate
,
[Alias("h")]
[Parameter(ParameterSetName='help')]
[switch] $help
)
$noInput = !$Deactivate -and !$Activate
if ($PSBoundParameters.ContainsKey('Activate') -or $noInput ) {
$Environment = [System.Environment]::GetEnvironmentVariable("Path", "Machine")
foreach ($path in ($Environment).Split(";"))
{
if ($path -like "C:\Program Files\Python310\Scripts\")
{
$Environment = $Environment.Replace($Path ,"")
}
if ($path -like "C:\Program Files\Python310\")
{
$Environment = $Environment.Replace($Path ,"")
}
}
$env:PATH = $Environment
. C:\Anaconda3\shell\condabin\conda-hook.ps1 ; conda activate 'C:\Anaconda3'
}
elseif ($Deactivate)
{
. C:\Anaconda3\shell\condabin\conda-hook.ps1 ; conda deactivate 'C:\Anaconda3'
$env:PATH = [Environment]::GetEnvironmentVariable('Path', 'Machine'),
[Environment]::GetEnvironmentVariable('Path', 'User') -join ';'
}
elseif ($help)
{ Write-Output "
-a activate conda
-d deactivate conda
-? Help. This is the same as not typing any options"
}
else { . C:\Anaconda3\shell\condabin\conda-hook.ps1 ; conda deactivate 'C:\Anaconda3'
}
}
This does not, the only difference being if ($PSBoundParameters.ContainsKey('Activate') -or $noInput ) vs elseif ($noInput) { . C:\Anaconda3\shell\condabin\conda-hook.ps1 ; conda deactivate 'C:\Anaconda3' }:
function aconda {
[CmdletBinding(DefaultParameterSetName = 'Activate')]
param(
[Alias('d')]
[Parameter(ParameterSetName='Deactivate')]
[switch] $Deactivate
,
[Alias('a')]
[Parameter(ParameterSetName='Activate')]
[switch] $Activate
,
[Alias("h")]
[Parameter(ParameterSetName='help')]
[switch] $help
)
$noInput = !$Deactivate -and !$Activate
if ($PSBoundParameters.ContainsKey('Activate') ) {
$Environment = [System.Environment]::GetEnvironmentVariable("Path", "Machine")
foreach ($path in ($Environment).Split(";"))
{
if ($path -like "C:\Program Files\Python310\Scripts\")
{
$Environment = $Environment.Replace($Path ,"")
}
if ($path -like "C:\Program Files\Python310\")
{
$Environment = $Environment.Replace($Path ,"")
}
}
$env:PATH = $Environment
. C:\Anaconda3\shell\condabin\conda-hook.ps1 ; conda activate 'C:\Anaconda3'
}
elseif ($Deactivate)
{
. C:\Anaconda3\shell\condabin\conda-hook.ps1 ; conda deactivate 'C:\Anaconda3'
$env:PATH = [Environment]::GetEnvironmentVariable('Path', 'Machine'),
[Environment]::GetEnvironmentVariable('Path', 'User') -join ';'
}
elseif ($help)
{ Write-Output "
-a activate conda
-d deactivate conda
-? Help. This is the same as not typing any options"
}
elseif ($noInput) { . C:\Anaconda3\shell\condabin\conda-hook.ps1 ; conda deactivate 'C:\Anaconda3'
}
}

Answer 1

Answering your question
Switch parameters are inherently $False, unless the user specifies that param. Since you want to do an operation if both switch params are false, you can add a check for that condition.
$noInput = !$Deactivate -and !$Activate
#...
elseif ($help -or $noInput){
#your Code here
}
Note: You will need to remove your CmdletParamSet attributes to use this technique.
If you want to ensure your users aren't running the function with both -Activate -Deactivate specified, then just add a check to see if both are true and if so Write-Error "You may only specify one activation selection"
Easier Alternative
Or better yet, change the switch statements to [switch]$ActivationStatus and remove the second switch, then users will use the function like this:
aconda -ActivationStatus $true
aconda -ActivationStatus $false