#!/bin/bash
# Proxmox LXC Container Setup: 3D-Druck Kostenkalkulation
# Auf dem Proxmox-Host ausfuehren (als root).
#
# Usage:
#   ./proxmox-setup.sh [CT_ID] [CT_NAME]
#   Default: CT_ID=201, CT_NAME=3ddruck-kalkulation

set -euo pipefail

CT_ID="${1:-201}"
CT_NAME="${2:-3ddruck-kalkulation}"
TEMPLATE="ubuntu-24.04-standard_24.04-2_amd64.tar.zst"
STORAGE="local-lvm"
BRIDGE="vmbr0"
GIT_REPO="https://gitea.teamthiele.de/ethiele/3ddruckkalkulation.git"

ROOT_PASS="$(openssl rand -base64 24)"
echo "=== Root-Passwort fuer Container: $ROOT_PASS ==="

# Pruefen ob Template vorhanden, sonst downloaden
if ! pveam list local | grep -q "$TEMPLATE"; then
    echo "=== Lade Ubuntu-24.04-Template ... ==="
    pveam download local "$TEMPLATE"
fi

# Pruefen ob Container bereits existiert
if pct list | grep -q "^ *$CT_ID "; then
    echo "=== Container $CT_ID existiert bereits. Loesche ... ==="
    pct stop "$CT_ID" 2>/dev/null || true
    pct destroy "$CT_ID" 2>/dev/null || true
fi

# Container erstellen
echo "=== Erstelle Container $CT_ID ($CT_NAME) ... ==="
pct create "$CT_ID" "local:vztemplate/$TEMPLATE" \
    --storage "$STORAGE" \
    --net0 "name=eth0,bridge=$BRIDGE,ip=dhcp" \
    --cores 1 \
    --memory 512 \
    --swap 512 \
    --unprivileged 1 \
    --ostype ubuntu \
    --hostname "$CT_NAME" \
    --password "$ROOT_PASS"

# Container starten
echo "=== Starte Container ... ==="
pct start "$CT_ID"
sleep 5

# Warten bis Netzwerk bereit
echo "=== Warte auf Netzwerk ... ==="
for i in $(seq 1 30); do
    if pct exec "$CT_ID" -- ping -c1 -W1 8.8.8.8 &>/dev/null; then
        echo "Netzwerk OK"
        break
    fi
    sleep 2
done

# System-Update und Basispakete
echo "=== Installiere Systempakete ... ==="
pct exec "$CT_ID" -- apt-get update
pct exec "$CT_ID" -- apt-get install -y git python3 python3-pip python3-venv

# App-Verzeichnis und Repo
echo "=== Klone Repository ... ==="
pct exec "$CT_ID" -- git clone "$GIT_REPO" /opt/3ddruck-kalkulation

# Python-Venv + Dependencies
echo "=== Installiere Python-Dependencies ... ==="
pct exec "$CT_ID" -- python3 -m venv /opt/3ddruck-kalkulation/.venv
pct exec "$CT_ID" -- /opt/3ddruck-kalkulation/.venv/bin/pip install flask fpdf2 pyyaml

# systemd-Service anlegen
echo "=== Erstelle systemd-Service ... ==="
pct exec "$CT_ID" -- tee /etc/systemd/system/3ddruck-kalkulation.service > /dev/null <<'SERVICE'
[Unit]
Description=3D-Druck Kostenkalkulation
After=network-online.target
Wants=network-online.target

[Service]
Type=simple
User=root
WorkingDirectory=/opt/3ddruck-kalkulation
ExecStart=/opt/3ddruck-kalkulation/.venv/bin/python app.py --no-reload
Restart=on-failure
RestartSec=5
Environment=PYTHONUNBUFFERED=1

[Install]
WantedBy=multi-user.target
SERVICE

# Service aktivieren und starten
echo "=== Aktiviere und starte Service ... ==="
pct exec "$CT_ID" -- systemctl daemon-reload
pct exec "$CT_ID" -- systemctl enable --now 3ddruck-kalkulation.service

# Warten und Status pruefen
sleep 3
pct exec "$CT_ID" -- systemctl status 3ddruck-kalkulation.service --no-pager || true

# IP anzeigen
CT_IP=$(pct exec "$CT_ID" -- hostname -I | awk '{print $1}')
echo ""
echo "=== Fertig! ==="
echo "Container $CT_ID ($CT_NAME) laeuft."
echo "Zugriff: http://$CT_IP:5000"
echo "Root-Passwort: $ROOT_PASS"
echo ""
echo "Zum Einloggen: pct enter $CT_ID"