#!/bin/bash

base_config="wg0.conf"
base_ip="192.168.57."
start_ip=110
server_config="wg0-server.conf"

# First create server base config
cat > "$server_config" << 'EOF'
[Interface]
Address = 192.168.57.2/24
SaveConfig = false
PostUp = ip route add 192.168.56.0/24 dev vboxnet0; iptables -A FORWARD -i wg0 -o vboxnet0 -j ACCEPT; iptables -A FORWARD -i vboxnet0 -o wg0 -j ACCEPT; iptables -t nat -A POSTROUTING -o vboxnet0 -j MASQUERADE
PostDown = ip route del 192.168.56.0/24 dev vboxnet0; iptables -D FORWARD -i wg0 -o vboxnet0 -j ACCEPT; iptables -D FORWARD -i vboxnet0 -o wg0 -j ACCEPT; iptables -t nat -D POSTROUTING -o vboxnet0 -j MASQUERADE
ListenPort = 51820
PrivateKey = SJuOEDojaWclA3vyq1tI3fKv+Phs9QdvUFG7mZj23VU=

EOF

# Create 30 configs
for i in {1..30}; do
    ip=$((start_ip + i))
    new_config="wg0_$ip.conf"
    wg genkey | tee "${ip}privatekey" | wg pubkey | tee "${ip}publickey"
	pub=$(cat ${ip}publickey)
	priv=$(cat "${ip}privatekey")
	echo $pub
    
    # Create new client config with all replacements
    sed -E "s#(Address = ${base_ip})[0-9]+#\1${ip}#; 
            s#(PrivateKey = ).*#\1${priv}#" "$base_config" > "$new_config"
    
    # Add peer to server config with the new public key
    cat >> "$server_config" << EOF
[Peer]
PublicKey = $pub
AllowedIPs = 192.168.57.${ip}/32

EOF
    
    echo "Created $new_config with IP ${base_ip}${ip}"
done

echo "Created $server_config with all peer public keys"