#!/usr/bin/env bash
# Fix WSL IP address from 192.168.11.4 to 192.168.11.23
# This script removes the old IP and adds the correct one

set -e

OLD_IP="192.168.11.4"
NEW_IP="192.168.11.23"
INTERFACE="eth0"

echo "🔧 Fixing WSL IP Address Configuration"
echo "   Changing from $OLD_IP to $NEW_IP"
echo ""

# Check if running as root
if [ "$EUID" -ne 0 ]; then 
    echo "❌ This script must be run with sudo"
    echo "   Usage: sudo $0"
    exit 1
fi

# Remove old IP if it exists
if ip addr show $INTERFACE | grep -q "$OLD_IP"; then
    echo "➖ Removing old IP address: $OLD_IP"
    ip addr del $OLD_IP/24 dev $INTERFACE 2>/dev/null || true
    echo "   ✅ Old IP removed"
else
    echo "   ℹ️  Old IP ($OLD_IP) not found, skipping removal"
fi

# Remove old route if it exists
if ip route show | grep -q "192.168.11.0/24.*src $OLD_IP"; then
    echo "➖ Removing old route"
    ip route del 192.168.11.0/24 dev $INTERFACE src $OLD_IP 2>/dev/null || true
    echo "   ✅ Old route removed"
fi

# Add new IP if it doesn't exist
if ip addr show $INTERFACE | grep -q "$NEW_IP"; then
    echo "   ℹ️  New IP ($NEW_IP) already configured"
else
    echo "➕ Adding new IP address: $NEW_IP"
    ip addr add $NEW_IP/24 dev $INTERFACE
    echo "   ✅ New IP added"
fi

# Add route if it doesn't exist
if ! ip route show | grep -q "192.168.11.0/24.*src $NEW_IP"; then
    echo "➕ Adding route for VLAN 11 network"
    ip route add 192.168.11.0/24 dev $INTERFACE src $NEW_IP 2>/dev/null || true
    echo "   ✅ Route added"
else
    echo "   ℹ️  Route already exists"
fi

echo ""
echo "✅ IP Configuration Updated!"
echo ""
echo "📋 Current IP Addresses on $INTERFACE:"
ip addr show $INTERFACE | grep "inet " | sed 's/^/   /'
echo ""
echo "💡 Next step: Update ~/.bashrc to use $NEW_IP for persistence"
echo "   Run: sed -i 's/$OLD_IP/$NEW_IP/g' ~/.bashrc"
echo ""