# ip-settings.ps1 - Run as Administrator

function Write-OK($msg)   { Write-Host "  [OK]  $msg" -ForegroundColor Green }
function Write-Info($msg) { Write-Host "  [..]  $msg" -ForegroundColor Yellow }
function Write-Err($msg)  { Write-Host "  [!!]  $msg" -ForegroundColor Red }
function Write-Warn($msg) { Write-Host "  [!!]  $msg" -ForegroundColor DarkYellow }

function Test-IPInUse($ip) {
    Write-Info "Checking if $ip is already in use on the network..."
    $ping = New-Object System.Net.NetworkInformation.Ping
    $result = $ping.Send($ip, 1000)
    return ($result.Status -eq "Success")
}

# Admin check
$id = [Security.Principal.WindowsIdentity]::GetCurrent()
$wp = New-Object Security.Principal.WindowsPrincipal($id)
$adminRole = [Security.Principal.WindowsBuiltInRole]::Administrator
if (-not $wp.IsInRole($adminRole)) {
    Write-Err "Please run this script as Administrator!"
    Read-Host "Press Enter to exit"
    exit 1
}

Clear-Host
Write-Host "============================================" -ForegroundColor Cyan
Write-Host "   LAN Network Profile Configurator        " -ForegroundColor Cyan
Write-Host "============================================" -ForegroundColor Cyan

# STEP 1 - List adapters
Write-Info "Scanning network adapters..."
$adapters = Get-NetAdapter | Where-Object { $_.HardwareInterface -eq $true } | Sort-Object InterfaceIndex

if ($adapters.Count -eq 0) {
    Write-Err "No network adapters found."
    Read-Host "Press Enter to exit"
    exit 1
}

Write-Host ""
Write-Host "  Available Network Adapters:" -ForegroundColor White
Write-Host ""

$i = 1
$adapterList = @()
foreach ($a in $adapters) {
    $ipInfo = Get-NetIPAddress -InterfaceIndex $a.InterfaceIndex -AddressFamily IPv4 -ErrorAction SilentlyContinue
    $iface  = Get-NetIPInterface -InterfaceIndex $a.InterfaceIndex -AddressFamily IPv4 -ErrorAction SilentlyContinue
    $currentIP  = if ($ipInfo) { $ipInfo.IPAddress } else { "No IP" }
    $dhcpStatus = if ($iface -and $iface.Dhcp -eq "Enabled") { "DHCP" } else { "Static" }
    $col = if ($a.Status -eq "Up") { "Green" } else { "DarkGray" }
    Write-Host ("  [{0}]  {1,-35}  Status: {2,-12}  Mode: {3,-8}  IP: {4}" -f $i, $a.Name, $a.Status, $dhcpStatus, $currentIP) -ForegroundColor $col
    $adapterList += [PSCustomObject]@{ Index = $i; Adapter = $a }
    $i++
}

# STEP 2 - Pick adapter
Write-Host ""
$adapterChoice = Read-Host "  Enter adapter number"
$selected = $adapterList | Where-Object { $_.Index -eq [int]$adapterChoice }
if (-not $selected) {
    Write-Err "Invalid selection."
    Read-Host "Press Enter to exit"
    exit 1
}

$nicName = $selected.Adapter.Name
$nicIdx  = $selected.Adapter.InterfaceIndex
Write-OK "Selected: $nicName  (Index $nicIdx)"

# STEP 3 - Show current config
Write-Host ""
Write-Host "  Current Configuration:" -ForegroundColor Magenta
Write-Host "  ----------------------------------------" -ForegroundColor DarkGray

$curIP    = Get-NetIPAddress    -InterfaceIndex $nicIdx -AddressFamily IPv4 -ErrorAction SilentlyContinue
$curIface = Get-NetIPInterface  -InterfaceIndex $nicIdx -AddressFamily IPv4 -ErrorAction SilentlyContinue
$curRoute = Get-NetRoute        -InterfaceIndex $nicIdx -DestinationPrefix "0.0.0.0/0" -ErrorAction SilentlyContinue
$curDns   = Get-DnsClientServerAddress -InterfaceIndex $nicIdx -AddressFamily IPv4 -ErrorAction SilentlyContinue

$curMode    = if ($curIface -and $curIface.Dhcp -eq "Enabled") { "DHCP (Automatic)" } else { "Static" }
$curIPStr   = if ($curIP)    { "$($curIP.IPAddress)/$($curIP.PrefixLength)" } else { "Not assigned" }
$curGWStr   = if ($curRoute) { $curRoute.NextHop } else { "None" }
$curDnsStr  = if ($curDns -and $curDns.ServerAddresses) { $curDns.ServerAddresses -join " / " } else { "Automatic" }

Write-Host ("  Mode    : {0}" -f $curMode)    -ForegroundColor White
Write-Host ("  IP      : {0}" -f $curIPStr)   -ForegroundColor White
Write-Host ("  Gateway : {0}" -f $curGWStr)   -ForegroundColor White
Write-Host ("  DNS     : {0}" -f $curDnsStr)  -ForegroundColor White
Write-Host "  ----------------------------------------" -ForegroundColor DarkGray

# STEP 4 - Choose profile
Write-Host ""
Write-Host "  Profiles:" -ForegroundColor White
Write-Host "  [1]  Camera Control  ->  192.168.178.22  /24   GW: 192.168.178.1   DNS: 192.168.178.10 / 192.168.178.14" -ForegroundColor White
Write-Host "  [2]  LAN Profile 2   ->  192.168.1.222   /24   GW: 192.168.1.1     DNS: Automatic" -ForegroundColor White
Write-Host "  [3]  DHCP (automatic)                                               DNS: Automatic" -ForegroundColor White
Write-Host "  [4]  DHCP (automatic)                                               DNS: 192.168.178.10 / 192.168.178.14" -ForegroundColor White
Write-Host ""
$profileChoice = Read-Host "  Enter profile number"

# STEP 5 - Confirmation
$profileNames = @{ "1" = "Camera Control  ->  192.168.178.22 /24"; "2" = "LAN Profile 2   ->  192.168.1.222 /24"; "3" = "DHCP (automatic)"; "4" = "DHCP + custom DNS" }
$chosenName = if ($profileNames.ContainsKey($profileChoice)) { $profileNames[$profileChoice] } else { "Unknown" }

Write-Host ""
Write-Host "  You are about to apply:" -ForegroundColor Yellow
Write-Host "  Profile  : $chosenName" -ForegroundColor Yellow
Write-Host "  Adapter  : $nicName" -ForegroundColor Yellow
Write-Host ""
$confirm = Read-Host "  Confirm? (Y/N)"
if ($confirm -notmatch "^[Yy]$") {
    Write-Host ""
    Write-Info "Cancelled. No changes were made."
    Write-Host ""
    Read-Host "Press Enter to exit"
    exit 0
}

# STEP 6 - Apply
Write-Info "Applying settings..."

if ($profileChoice -eq "1") {
    $newIP   = "192.168.178.22"
    $prefix  = 24
    $gateway = "192.168.178.1"
    $dns1    = "192.168.178.10"
    $dns2    = "192.168.178.14"

    if (Test-IPInUse $newIP) {
        Write-Host ""
        Write-Warn "WARNING: $newIP is already responding on the network!"
        Write-Warn "Another device may be using this IP address."
        Write-Host ""
        $forceApply = Read-Host "  Apply anyway? (Y/N)"
        if ($forceApply -notmatch "^[Yy]$") {
            Write-Info "Cancelled. No changes were made."
            Read-Host "Press Enter to exit"
            exit 0
        }
    } else {
        Write-OK "$newIP is free - no conflict detected"
    }

    Remove-NetIPAddress -InterfaceIndex $nicIdx -Confirm:$false -ErrorAction SilentlyContinue
    Remove-NetRoute     -InterfaceIndex $nicIdx -Confirm:$false -ErrorAction SilentlyContinue
    New-NetIPAddress -InterfaceIndex $nicIdx -IPAddress $newIP -PrefixLength $prefix -DefaultGateway $gateway | Out-Null
    Set-DnsClientServerAddress -InterfaceIndex $nicIdx -ServerAddresses ($dns1, $dns2) | Out-Null

    Write-OK "Camera Control applied"
    Write-OK "  IP      : $newIP/$prefix"
    Write-OK "  Gateway : $gateway"
    Write-OK "  DNS 1   : $dns1"
    Write-OK "  DNS 2   : $dns2"
}
elseif ($profileChoice -eq "2") {
    $newIP   = "192.168.1.222"
    $prefix  = 24
    $gateway = "192.168.1.1"

    if (Test-IPInUse $newIP) {
        Write-Host ""
        Write-Warn "WARNING: $newIP is already responding on the network!"
        Write-Warn "Another device may be using this IP address."
        Write-Host ""
        $forceApply = Read-Host "  Apply anyway? (Y/N)"
        if ($forceApply -notmatch "^[Yy]$") {
            Write-Info "Cancelled. No changes were made."
            Read-Host "Press Enter to exit"
            exit 0
        }
    } else {
        Write-OK "$newIP is free - no conflict detected"
    }

    Remove-NetIPAddress -InterfaceIndex $nicIdx -Confirm:$false -ErrorAction SilentlyContinue
    Remove-NetRoute     -InterfaceIndex $nicIdx -Confirm:$false -ErrorAction SilentlyContinue
    New-NetIPAddress -InterfaceIndex $nicIdx -IPAddress $newIP -PrefixLength $prefix -DefaultGateway $gateway | Out-Null
    Set-DnsClientServerAddress -InterfaceIndex $nicIdx -ResetServerAddresses | Out-Null

    Write-OK "LAN Profile 2 applied"
    Write-OK "  IP      : $newIP/$prefix"
    Write-OK "  Gateway : $gateway"
    Write-OK "  DNS     : Automatic"
}
elseif ($profileChoice -eq "3") {
    Set-NetIPInterface -InterfaceIndex $nicIdx -Dhcp Enabled
    Set-DnsClientServerAddress -InterfaceIndex $nicIdx -ResetServerAddresses

    Write-OK "Adapter '$nicName' switched to DHCP"
    Write-OK "  IP  : Automatic"
    Write-OK "  DNS : Automatic"
}
elseif ($profileChoice -eq "4") {
    $dns1 = "192.168.178.10"
    $dns2 = "192.168.178.14"

    Set-NetIPInterface -InterfaceIndex $nicIdx -Dhcp Enabled
    Set-DnsClientServerAddress -InterfaceIndex $nicIdx -ServerAddresses ($dns1, $dns2) | Out-Null

    Write-OK "Adapter '$nicName' switched to DHCP with custom DNS"
    Write-OK "  IP    : Automatic"
    Write-OK "  DNS 1 : $dns1"
    Write-OK "  DNS 2 : $dns2"
}
else {
    Write-Err "Invalid profile choice. No changes made."
    Read-Host "Press Enter to exit"
    exit 1
}

# STEP 5 - Verify
Write-Info "Verifying new config..."
Start-Sleep -Seconds 2
$verify = Get-NetIPAddress -InterfaceIndex $nicIdx -AddressFamily IPv4 -ErrorAction SilentlyContinue
$dnsVerify = Get-DnsClientServerAddress -InterfaceIndex $nicIdx -AddressFamily IPv4 -ErrorAction SilentlyContinue

Write-Host ""
if ($verify) {
    Write-Host "  IP  : $($verify.IPAddress)/$($verify.PrefixLength)" -ForegroundColor Green
}
if ($dnsVerify -and $dnsVerify.ServerAddresses) {
    Write-Host "  DNS : $($dnsVerify.ServerAddresses -join ' / ')" -ForegroundColor Green
} else {
    Write-Host "  DNS : Automatic" -ForegroundColor Green
}

Write-Host ""
Write-Host "  Done!" -ForegroundColor Cyan
Write-Host ""
Read-Host "Press Enter to exit"