#!/usr/bin/env bash
set -euo pipefail

port_in_use() {
  lsof -nP -iTCP:"$1" -sTCP:LISTEN &>/dev/null
}

find_port() {
  local port=$1
  while port_in_use "$port"; do
    ((port++))
  done
  echo "$port"
}

# Hash the handle to get a deterministic port offset (0-99)
hash=$(echo -n "$WM_HANDLE" | md5sum | cut -c1-4)
offset=$((16#$hash % 100))

# Find available ports starting from the hash-based offset
backend_port=$(find_port $((8000 + offset * 10)))
frontend_port=$(find_port $((3000 + offset * 10)))

# Generate .env.local with port overrides
cat > .env.local <<EOF
BACKEND_PORT=$backend_port
FRONTEND_PORT=$frontend_port
REMOTE=http://localhost:$backend_port
EOF

echo "Created .env.local with ports: backend=$backend_port, frontend=$frontend_port"