# Import Az module
Import-Module Az

# Variables for Azure Virtual Desktop Environment
$subscriptionId = "xxxxx-xxxx-xxx-xxx"
$resourceGroupName = "MyRG"
$hostPoolName = "MyHostpool"
$sessionHostUser = "testuser"  # FSLogix user profile to test
$password = "password" | ConvertTo-SecureString -AsPlainText -Force
$domain = "abc_company.onmicrosoft.com"  # Domain where the user is authenticated
$sessionCount = 4   # Number of concurrent sessions to simulate
$monitorInterval = 30  # Monitoring interval in seconds

#Get Access token
# Set up the variables
$tenantId = "aaaa-aaaa-aaaa"
$clientId = "bbbb-bbbb-bbbb-bbb"
$clientSecret = "1gebdjsadkbdjqwduqwid2b" #client secret value from app reg
$resource = "https://rdweb.wvd.microsoft.com"  # e.g., "https://graph.microsoft.com" for Microsoft Graph

# Create the request body for the token request
$body = @{
    client_id     = $clientId
    client_secret = $clientSecret
    scope         = "$resource/.default"
    grant_type    = "client_credentials"
}

# Request the token
$uri = "https://login.microsoftonline.com/$tenantId/oauth2/v2.0/token"
$response = Invoke-RestMethod -Method Post -Uri $uri -ContentType "application/x-www-form-urlencoded" -Body $body

# Extract the access token
$accessToken = $response.access_token

# Display the access token
$accessToken


# Azure Login
Write-Output "Logging into Azure..."
Connect-AzAccount -UseDeviceAuthentication

# Get Session Hosts in the Host Pool
Write-Output "Retrieving session hosts in the Host Pool..."
$sessionHosts = Get-AzWvdSessionHost -ResourceGroupName $resourceGroupName -HostPoolName $hostPoolName

if (-not $sessionHosts) {
    Write-Output "No session hosts found in the specified host pool."
    exit
}

# Simulate User Logins via Azure Virtual Desktop API
Write-Output "Starting user login simulation..."
for ($i = 1; $i -le $sessionCount; $i++) {
    $host1 = $sessionHosts[$i % $sessionHosts.Count]  # Round-robin session host selection

    # Example: Interact with AVD API for user sessions
    $apiUrl = "https://management.azure.com/subscriptions/$subscriptionId/resourceGroups/$resourceGroupName/providers/Microsoft.DesktopVirtualization/hostPools/$hostPoolName/userSessions?api-version=2022-02-10"

    # Construct the payload or parameters as needed
    $body = @{
        username = "$domain\$sessionHostUser"
    }

    # API call for session interaction
    $response = Invoke-RestMethod -Method Post -Uri $apiUrl -Headers @{
        Authorization = "Bearer $token"
    } -Body ($body | ConvertTo-Json -Depth 10)

    Write-Output "Simulated user login for session host $($host1.SessionHostName): $response.status"
    Start-Sleep -Seconds 2  # Delay to avoid overwhelming session hosts
}
# Monitor Performance Metrics
Write-Output "Monitoring session host performance..."
while ($true) {
    foreach ($host2 in $sessionHosts) {
        #$performance = Get-AzWvdSessionHost -ResourceGroupName $resourceGroupName -HostPoolName $hostPoolName -SessionHostName $host2.SessionHostName
        #Write-Output "Session Host: $($host2.SessionHostName)"
        Write-Output "    CPU Usage: $($performance.CpuUsagePercent)%"
        Write-Output "    Memory Usage: $($performance.MemoryUsageInMB) MB"
        Write-Output "    Sessions Active: $($performance.SessionsActive)"
    }
    Start-Sleep -Seconds $monitorInterval
}