# assignIPWindows.ps1
# Deploy to: C:\CLISave\AssignIP\assignIPWindows.ps1 on the vSphere Windows host
#
# Usage: powershell -ExecutionPolicy Bypass -NonInteractive -File assignIPWindows.ps1 \
# <vm_id> <ip> <gateway> <cidr> <vcenter_host> <vcenter_user> <vcenter_password> <guest_password>
#
# Output: SUCCESS | FAIL (exactly one line)
param(
    [Parameter(Mandatory = $true)][string]$VmId,
    [Parameter(Mandatory = $true)][string]$Ip,
    [Parameter(Mandatory = $true)][string]$Gateway,
    [Parameter(Mandatory = $true)][string]$Cidr,
    [Parameter(Mandatory = $true)][string]$VCenterHost,
    [Parameter(Mandatory = $true)][string]$VCenterUser,
    [Parameter(Mandatory = $true)][string]$VCenterPassword,
    [Parameter(Mandatory = $true)][string]$GuestPassword
)

Set-StrictMode -Version Latest
$ErrorActionPreference = "Stop"

try {
    Import-Module VMware.VimAutomation.Core -ErrorAction Stop

    Set-PowerCLIConfiguration -InvalidCertificateAction Ignore -Confirm:$false | Out-Null
    Set-PowerCLIConfiguration -Scope User -ParticipateInCEIP $false -Confirm:$false | Out-Null

    Connect-VIServer -Server $VCenterHost -User $VCenterUser -Password $VCenterPassword -Force -ErrorAction Stop | Out-Null

    $vm = Get-VM -Id "VirtualMachine-$VmId" -ErrorAction Stop

    # PowerShell script executed inside the Windows guest via VMware Tools
    $guestScript = @"
$ErrorActionPreference = 'Stop'

try {
    # Find the first active ethernet adapter that is not a loopback
    $adapter = Get-NetAdapter |
        Where-Object { $_.Status -eq 'Up' -and $_.InterfaceDescription -notlike '*Loopback*' } |
        Sort-Object -Property InterfaceIndex |
        Select-Object -First 1

    if (-not $adapter) {
        throw 'No active network adapter found'
    }

    # Remove existing IPv4 addresses and routes on this interface
    $adapter |
        Get-NetIPAddress -AddressFamily IPv4 -ErrorAction SilentlyContinue |
        Remove-NetIPAddress -Confirm:$false -ErrorAction SilentlyContinue

    Get-NetRoute -InterfaceIndex $adapter.InterfaceIndex -AddressFamily IPv4 -ErrorAction SilentlyContinue |
        Remove-NetRoute -Confirm:$false -ErrorAction SilentlyContinue

    # Set new static IP
    New-NetIPAddress -InterfaceIndex $adapter.InterfaceIndex -IPAddress '$Ip' -PrefixLength $Cidr -DefaultGateway '$Gateway' -ErrorAction Stop | Out-Null

    Write-Output 'SUCCESS'
} catch {
    Write-Output 'FAIL'
}
"@

    $result = Invoke-VMScript -VM $vm -ScriptText $guestScript -GuestUser "administrator" -GuestPassword $GuestPassword -ScriptType Powershell -ErrorAction Stop

    if ($result.ScriptOutput -match "SUCCESS") {
        Write-Output "SUCCESS"
    } else {
        Write-Output "FAIL"
    }
} catch {
    Write-Output "FAIL"
    Write-Output $_.Exception.Message
} finally {
    Disconnect-VIServer -Confirm:$false -ErrorAction SilentlyContinue | Out-Null
}