# Import necessary modules
Import-Module Corsinvest.ProxmoxVE.Api
Import-Module ImportExcel
Add-Type -AssemblyName System.Windows.Forms

# Proxmox connection info
$ProxmoxURL = "https://your-proxmox-url:8006"
$ProxmoxUser = "root"
$ProxmoxPassword = "P@ssw0rd"
$ProxmoxRealm = "pam"

# Connect to Proxmox
$credentials = New-Object System.Management.Automation.PSCredential ($ProxmoxUser, (ConvertTo-SecureString $ProxmoxPassword -AsPlainText -Force))
$null = Connect-PveCluster -Server $ProxmoxURL -User $ProxmoxUser -Realm $ProxmoxRealm -Credential $credentials

# Read Excel data
$excelPath = "C:\path\to\depl_systems.xlsx"
$hostsData = Import-Excel -Path $excelPath

# Function to get VMs from Proxmox
function Get-ProxmoxVMs {
    $vms = Get-PveVMList
    return $vms
}

# Function to check missing VMs
function Get-MissingVMs {
    $proxmoxVMs = Get-ProxmoxVMs
    $missingVMs = @()

    foreach ($host in $hostsData) {
        $vmName = $host.'VM-Name'
        if ($proxmoxVMs | Where-Object { $_.name -eq $vmName } -eq $null) {
            $missingVMs += $host
        }
    }

    return $missingVMs
}

# Function to get node usage
function Get-NodeUsage {
    param ($node)

    $usage = Get-PveNodeStatus -NodeName $node
    return @{
        Node = $node
        MaxMem = $usage.memory.total
        Mem = $usage.memory.used
        MaxDisk = $usage.rootfs.total
        Disk = $usage.rootfs.used
    }
}

# Function to create and start VM
function Create-VM {
    param (
        $node,
        $vmId,
        $vmName,
        $vmCores,
        $vmMemory,
        $vmDiskSize,
        $isoFile
    )

    $params = @{
        NodeName = $node
        VMID = $vmId
        Name = $vmName
        Cores = $vmCores
        Memory = $vmMemory
        DiskSize = $vmDiskSize
        ISOImage = $isoFile
    }

    New-PveVM @params
    Start-PveVM -NodeName $node -VMID $vmId
    Write-Host "VM wurde auf dem Node $node erstellt und gestartet"
}

# Create GUI
$form = New-Object System.Windows.Forms.Form
$form.Text = "Proxmox VM Manager"
$form.Size = New-Object System.Drawing.Size(600, 400)

$listBox = New-Object System.Windows.Forms.ListBox
$listBox.Size = New-Object System.Drawing.Size(560, 300)
$listBox.Location = New-Object System.Drawing.Point(10, 10)

$buttonCheck = New-Object System.Windows.Forms.Button
$buttonCheck.Text = "Check Missing VMs"
$buttonCheck.Size = New-Object System.Drawing.Size(120, 30)
$buttonCheck.Location = New-Object System.Drawing.Point(10, 320)
$buttonCheck.Add_Click({
    $missingVMs = Get-MissingVMs
    $listBox.Items.Clear()
    if ($missingVMs.Count -eq 0) {
        $listBox.Items.Add("Es fehlen keine VMs.")
    } else {
        foreach ($vm in $missingVMs) {
            $listBox.Items.Add("$($vm.'VM-Name')")
        }
    }
})

$buttonDeploy = New-Object System.Windows.Forms.Button
$buttonDeploy.Text = "Deploy Missing VMs"
$buttonDeploy.Size = New-Object System.Drawing.Size(120, 30)
$buttonDeploy.Location = New-Object System.Drawing.Point(140, 320)
$buttonDeploy.Add_Click({
    $missingVMs = Get-MissingVMs
    if ($missingVMs.Count -eq 0) {
        [System.Windows.Forms.MessageBox]::Show("Es fehlen keine VMs.")
        return
    }

    foreach ($hostData in $missingVMs) {
        # Create custom ISO for host (implement your own logic)
        $customIsoPath = "C:\path\to\custom.iso"

        # Upload ISO to Proxmox
        $isoUploadPath = "/var/lib/vz/template/iso/custom.iso"
        $null = Upload-PveFile -NodeName $bestNode.Node -ContentType iso -FilePath $customIsoPath -Storage local

        # Get cluster nodes and their usage
        $nodes = Get-PveNode
        $nodeUsages = @()
        foreach ($node in $nodes) {
            $nodeUsages += Get-NodeUsage -node $node.name
        }

        # Select the best node based on available resources
        $bestNode = $nodeUsages | Sort-Object {[math]::Min($_.MaxMem - $_.Mem, $_.MaxDisk - $_.Disk)} -Descending | Select-Object -First 1
        Write-Host "Der beste Node zur Erstellung der VM ist: $($bestNode.Node)"

        # VM creation parameters
        $vmId = $hostData.'VM-ID'
        $vmName = $hostData.'VM-Name'
        $vmCores = $hostData.'Cores'
        $vmMemory = $hostData.'Memory'
        $vmDiskSize = $hostData.'Disk-Size'
        $isoFile = "local:iso/custom.iso"

        # Create and start the VM
        Create-VM -node $bestNode.Node -vmId $vmId -vmName $vmName -vmCores $vmCores -vmMemory $vmMemory -vmDiskSize $vmDiskSize -isoFile $isoFile
    }

    [System.Windows.Forms.MessageBox]::Show("Alle fehlenden VMs wurden erstellt.")
})

$form.Controls.Add($listBox)
$form.Controls.Add($buttonCheck)
$form.Controls.Add($buttonDeploy)

# Load existing VMs into the listbox
$listBox.Items.Clear()
$vms = Get-ProxmoxVMs
foreach ($vm in $vms) {
    $listBox.Items.Add($vm.name)
}

$form.ShowDialog()