#!/bin/bash

# Colors
GREEN="\033[1;32m"
RED="\033[1;31m"
YELLOW="\033[1;33m"
NC="\033[0m"

echo -e "${GREEN}Proxmox Apt-Cacher-NG Setup${NC}"

# Prompt for target selection
while true; do
  echo -e "${YELLOW}Select what to update:${NC}"
  echo "1) LXC Containers"
  echo "2) VMs"
  echo "3) All (LXC + VMs)"
  read -rp "Enter choice [1-3]: " TARGET_CHOICE
  case $TARGET_CHOICE in
    1|2|3) break;;
    *) echo -e "${RED}Invalid choice. Please enter 1, 2, or 3.${NC}";;
  esac
done

# Prompt for updating Proxmox node itself
while true; do
  read -rp "Do you want to update the Proxmox node itself with the cache? (y/n): " UPDATE_NODE
  case $UPDATE_NODE in
    y|n) break;;
    *) echo -e "${RED}Please enter y or n.${NC}";;
  esac
done

# Ask for the apt-cacher-ng server IP and port
read -rp "Enter your apt-cacher-ng IP address (default: 192.168.1.10): " CACHE_IP
CACHE_IP="${CACHE_IP:-192.168.1.10}"

read -rp "Enter apt-cacher-ng port (default: 3142): " CACHE_PORT
CACHE_PORT="${CACHE_PORT:-3142}"

APT_PROXY="Acquire::http::Proxy \"http://${CACHE_IP}:${CACHE_PORT}\";"

echo -e "\n${YELLOW}Using APT Proxy: ${APT_PROXY}${NC}\n"

# Confirm before proceeding
read -rp "Proceed to update selected targets with this proxy? (y/n): " CONFIRM
[[ "$CONFIRM" != "y" ]] && echo "Aborted." && exit 1

### Update LXC containers ###
if pct list &>/dev/null && { [ "$TARGET_CHOICE" = "1" ] || [ "$TARGET_CHOICE" = "3" ]; }; then
  echo -e "\n${GREEN}Updating LXC Containers...${NC}"
  for CTID in $(pct list | awk 'NR>1 {print $1}'); do
    echo -e "\n${YELLOW}Updating LXC: $CTID${NC}"
    pct exec "$CTID" -- bash -c "
      mkdir -p /etc/apt/apt.conf.d
      echo '${APT_PROXY}' > /etc/apt/apt.conf.d/01proxy
    "
    echo -e "${GREEN}LXC $CTID updated successfully.${NC}"
  done
fi

### Update VMs via QEMU Guest Agent ###
if qm list &>/dev/null && { [ "$TARGET_CHOICE" = "2" ] || [ "$TARGET_CHOICE" = "3" ]; }; then
  echo -e "\n${GREEN}Updating VMs via QEMU Agent...${NC}"
  for VMID in $(qm list | awk 'NR>1 {print $1}'); do
    if qm guest cmd "$VMID" get-osinfo &>/dev/null; then
      echo -e "\n${YELLOW}Updating VM: $VMID${NC}"
      qm guest exec "$VMID" -- bash -c "
        mkdir -p /etc/apt/apt.conf.d
        echo '${APT_PROXY}' > /etc/apt/apt.conf.d/01proxy
      " &>/dev/null
      echo -e "${GREEN}VM $VMID updated successfully.${NC}"
    else
      echo -e "${RED}Skipping VM $VMID – QEMU Guest Agent not available.${NC}"
    fi
  done
fi

### Update Proxmox Node itself ###
if [ "$UPDATE_NODE" = "y" ]; then
  echo -e "\n${GREEN}Updating Proxmox Node itself...${NC}"
  mkdir -p /etc/apt/apt.conf.d
  echo "${APT_PROXY}" > /etc/apt/apt.conf.d/01proxy
  echo -e "${GREEN}Proxmox Node updated successfully.${NC}"
fi

echo -e "\n${GREEN}All done. apt-cacher-ng configuration updated as selected.${NC}"