#!/bin/bash

read -e -p "LXCHOSTNAME: " LXCHOSTNAME
export LXCHOSTNAME

# Stop the template container
lxc-stop -n template

# Copy the template to create a new container with the given hostname
lxc-copy -n template -N "$LXCHOSTNAME"

# Function to generate a unique MAC address
generate_unique_hwaddr() {
    local hwaddr
    local existing_hwaddrs
    while : ; do
        hwaddr=$(printf '00:16:3e:%02x:%02x:%02x\n' $((RANDOM%256)) $((RANDOM%256)) $((RANDOM%256)))
        existing_hwaddrs=$(grep "lxc.net.0.hwaddr" /var/lib/lxc/*/config | grep "$hwaddr")
        if [ -z "$existing_hwaddrs" ]; then
            # MAC address is unique
            echo "$hwaddr"
            return
        fi
    done
}

# Generate a unique MAC address
NEW_HWADDR=$(generate_unique_hwaddr)

# Path to the LXC configuration file
CONFIG_FILE="/var/lib/lxc/$LXCHOSTNAME/config"

# Replace the existing hwaddr line
sed -i "/^lxc.net.0.hwaddr/c\lxc.net.0.hwaddr = $NEW_HWADDR" "$CONFIG_FILE"

echo "MAC address in $CONFIG_FILE updated to $NEW_HWADDR."

# Start the new container
lxc-start -n "$LXCHOSTNAME"

# Wait for the container to start
sleep 5

# Change the hostname inside the container
lxc-attach -n "$LXCHOSTNAME" -- bash -c "echo '$LXCHOSTNAME' > /etc/hostname"
lxc-attach -n "$LXCHOSTNAME" -- hostname "$LXCHOSTNAME"

# Update /etc/hosts
lxc-attach -n "$LXCHOSTNAME" -- bash -c "echo '127.0.0.1 $LXCHOSTNAME' >> /etc/hosts"

# Ensure the container has internet access (optional, check and adjust if needed)
lxc-attach -n "$LXCHOSTNAME" -- ping -c 4 google.com
echo

# Stop and restart the container
lxc-stop -n "$LXCHOSTNAME"
lxc-start -n "$LXCHOSTNAME"

# Display the MAC addresses to verify the changes
grep lxc.net.0.hwaddr /var/lib/lxc/*/config

# Wait and list containers to ensure they are running
sleep 9
lxc-ls -f