#!/bin/bash
# =====================================================
# Proxmox VE: Debian 13 LXC automatisch erstellen (dialog)
# =====================================================

set -e

# ---- Konfiguration ----
IP="10.60.10.2/24"
GATEWAY="10.60.10.1"
CORES=1
MEMORY=512
SWAP=0
ROOTFS_SIZE=8
BRIDGE="xx_vmbrmgt"
MIN_VMID=300

DIALOG=dialog
BACKTITLE="Proxmox VE LXC Installer"
TMPFILE=$(mktemp)

cleanup() {
    rm -f "$TMPFILE"
}
trap cleanup EXIT

# ---- Root Check ----
if [[ $EUID -ne 0 ]]; then
    echo "Bitte als Root ausführen!"
    exit 1
fi

# ---- Root Passwort ----
ROOTPASS=$(
$DIALOG --backtitle "$BACKTITLE" \
        --passwordbox "Root-Passwort für den LXC:" 10 60 \
        2> "$TMPFILE" || exit 1
cat "$TMPFILE"
)

# ---- Hostname ----
HOSTNAME="$(hostname)-MGNT"

$DIALOG --backtitle "$BACKTITLE" \
        --msgbox "LXC Hostname:\n\n$HOSTNAME" 8 50

# ---- VMID ermitteln ----
VMID=$MIN_VMID
while pct status "$VMID" &>/dev/null; do
    ((VMID++))
done

# ---- Storage Auswahl ----
mapfile -t STORAGES < <(pvesm status --content rootdir | awk 'NR>1 {print $1}')

if [[ ${#STORAGES[@]} -eq 0 ]]; then
    $DIALOG --msgbox "Kein geeigneter Storage gefunden!" 8 50
    exit 1
fi

MENU_ITEMS=()
for i in "${!STORAGES[@]}"; do
    MENU_ITEMS+=("$i" "${STORAGES[$i]}")
done

STORAGE_INDEX=$(
$DIALOG --backtitle "$BACKTITLE" \
        --menu "Storage für RootFS auswählen:" 15 60 6 \
        "${MENU_ITEMS[@]}" \
        2> "$TMPFILE" || exit 1
cat "$TMPFILE"
)

STORAGE="${STORAGES[$STORAGE_INDEX]}"

# ---- Template suchen ----
$DIALOG --infobox "Suche aktuelles Debian 13 Template..." 5 50
pveam update >/dev/null

TEMPLATE_NAME=$(pveam available | awk '/debian-13-standard_.*_amd64\.tar\.zst/ {print $2}' | tail -n1)

if [[ -z "$TEMPLATE_NAME" ]]; then
    $DIALOG --msgbox "Kein Debian 13 Template gefunden!" 8 50
    exit 1
fi

# ---- Template laden ----
TEMPLATE_PATH="/var/lib/vz/template/cache/$TEMPLATE_NAME"
if [[ ! -f "$TEMPLATE_PATH" ]]; then
    $DIALOG --infobox "Lade Template:\n$TEMPLATE_NAME" 6 60
    pveam download local "$TEMPLATE_NAME"
fi

# ---- Zusammenfassung ----
$DIALOG --backtitle "$BACKTITLE" \
        --yesno \
"Zusammenfassung:

Hostname:  $HOSTNAME
VMID:      $VMID
Storage:   $STORAGE
IP:        $IP
Bridge:    $BRIDGE
RAM:       ${MEMORY}MB
Cores:     $CORES

LXC jetzt erstellen?" 15 60

# ---- LXC erstellen ----
$DIALOG --infobox "Erstelle unprivilegierten LXC..." 5 50

pct create "$VMID" "local:vztmpl/$TEMPLATE_NAME" \
    --hostname "$HOSTNAME" \
    --cores "$CORES" \
    --memory "$MEMORY" \
    --swap "$SWAP" \
    --rootfs "$STORAGE:$ROOTFS_SIZE" \
    --net0 "name=eth0,bridge=$BRIDGE,ip=$IP,gw=$GATEWAY,type=veth" \
    --unprivileged 1 \
    --password "$ROOTPASS"

# ---- WebUI Konsole ----
CONF_FILE="/etc/pve/lxc/$VMID.conf"
{
    echo "lxc.tty.max = 2"
    echo "lxc.pty.max = 2"
    echo "features: nesting=1,keyctl=1"
} >> "$CONF_FILE"

# ---- Autostart ----
pct set "$VMID" --onboot 1

# ---- Starten ----
pct start "$VMID"

# ---- Post-Install ----
$DIALOG --infobox "Installiere Newt-PVE-MGNT im LXC..." 5 60

pct exec "$VMID" -- bash -c "
apt update &&
apt install -y curl sudo &&
curl -fsSL https://gitea.vmd55888.de/manuel.maier/update-install-newt/raw/branch/main/install_newt_v2.sh -o install_newt_v2.sh &&
bash ./install_newt_v2.sh --install
"

# ---- Fertig ----
$DIALOG --backtitle "$BACKTITLE" \
        --msgbox \
"LXC erfolgreich erstellt!

Name: $HOSTNAME
VMID: $VMID
Autostart: aktiv
Status: gestartet" 10 50