#!/bin/bash

HOST="server"
USER="ubuntu"
PASSWORD="ubuntu"

for cmd in sshpass; do
  if ! command -v $cmd &>/dev/null; then
    echo "Error: $cmd is not installed. Please install it first."
    exit 1
  fi
done

echo "Fetching interfaces from server..."
interfaces=$(sshpass -p "$PASSWORD" ssh -o StrictHostKeyChecking=no -o LogLevel=ERROR "$USER@$HOST" \
  "ip -o link show | awk -F': ' '!/lo:/ {print \$2}'")

PS3="Select network interface: "
select interface in $interfaces; do
  if [[ -n "$interface" ]]; then
    echo "Selected interface: $interface"
    break
  else
    echo "Invalid selection"
  fi
done

PS3="Select latency/packet loss profile: "
profiles=(
  "clear config"
  "10 ms, 0% pl"
  "100 ms, 0% pl"
  "10 ms, 2% pl"
  "50 ms, 2% pl"
  "100 ms, 2% pl"
  "10 ms, 6% pl"
  "custom"
)

select profile in "${profiles[@]}"; do
  case $REPLY in
  1)
    delay=0
    loss=0
    ;;
  2)
    delay=10
    loss=0
    ;;
  3)
    delay=100
    loss=0
    ;;
  4)
    delay=10
    loss=2
    ;;
  5)
    delay=50
    loss=2
    ;;
  6)
    delay=100
    loss=2
    ;;
  7)
    delay=10
    loss=6
    ;;
  8)
    read -p "Enter delay (ms): " delay
    read -p "Enter packet loss (%): " loss
    ;;
  *)
    echo "Invalid option"
    continue
    ;;
  esac
  break
done

if [[ $delay -eq 0 && $loss -eq 0 ]]; then
  command="sudo tc qdisc del dev $interface root || true"
else
  command="sudo tc qdisc replace dev $interface root netem delay ${delay}ms loss ${loss}%"
fi

echo "Applying configuration: $profile"
sshpass -p "$PASSWORD" ssh -o StrictHostKeyChecking=no -o LogLevel=ERROR "$USER@$HOST" "$command"
echo "Configuration applied successfully"