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

ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
BACKEND_PORT="${BACKEND_PORT:-8010}"
FRONTEND_PORT="${FRONTEND_PORT:-5173}"

port_pid() {
  lsof -tiTCP:"$1" -sTCP:LISTEN 2>/dev/null | head -n 1 || true
}

port_cmd() {
  local pid
  pid="$(port_pid "$1")"
  if [[ -z "$pid" ]]; then
    return 0
  fi
  ps -p "$pid" -o command= 2>/dev/null || true
}

print_port_conflict() {
  local port="$1"
  local pid
  local cmd
  pid="$(port_pid "$port")"
  cmd="$(port_cmd "$port")"
  echo "Port $port is already in use." >&2
  if [[ -n "$pid" ]]; then
    echo "  PID: $pid" >&2
  fi
  if [[ -n "$cmd" ]]; then
    echo "  CMD: $cmd" >&2
  fi
}

cleanup() {
  if [[ -n "${BACKEND_PID:-}" ]]; then
    kill "$BACKEND_PID" 2>/dev/null || true
  fi
  if [[ -n "${FRONTEND_PID:-}" ]]; then
    kill "$FRONTEND_PID" 2>/dev/null || true
  fi
}

trap cleanup EXIT INT TERM

if [[ -n "$(port_pid "$BACKEND_PORT")" ]]; then
  print_port_conflict "$BACKEND_PORT"
  echo "Set BACKEND_PORT to another port or stop the existing process first." >&2
  exit 1
fi

if [[ -n "$(port_pid "$FRONTEND_PORT")" ]]; then
  print_port_conflict "$FRONTEND_PORT"
  echo "Set FRONTEND_PORT to another port or stop the existing process first." >&2
  exit 1
fi

cd "$ROOT_DIR"
# Prefer miniconda Python (has all project deps); fall back to conda/system python3
PYTHON="${CONDA_PREFIX:-}/bin/python"
if [[ ! -x "$PYTHON" ]]; then
  PYTHON="$(command -v /Users/icemilk/miniconda3/bin/python 2>/dev/null || command -v python3)"
fi
"$PYTHON" -m uvicorn backend.app.main:app --host 127.0.0.1 --port "$BACKEND_PORT" --reload \
  > >(sed 's/^/[backend] /') \
  2> >(sed 's/^/[backend] /' >&2) &
BACKEND_PID=$!

cd "$ROOT_DIR/frontend"
npm run dev -- --host 127.0.0.1 --port "$FRONTEND_PORT" \
  > >(sed 's/^/[frontend] /') \
  2> >(sed 's/^/[frontend] /' >&2) &
FRONTEND_PID=$!

echo "Backend:  http://127.0.0.1:${BACKEND_PORT}"
echo "Frontend: http://127.0.0.1:${FRONTEND_PORT}"
echo "Press Ctrl+C to stop both services."

wait "$BACKEND_PID" "$FRONTEND_PID"