#!/usr/bin/env bash
# 在仓库任意目录记这三条就够:
#   npm run be    只开后端  http://127.0.0.1:8010
#   npm run fe    只开前端  http://127.0.0.1:5173
#   npm run dev   两个一起开(在项目根目录)
set -euo pipefail

ROOT="$(cd "$(dirname "$0")/.." && pwd)"
MODE="${1:-all}"
PY="$ROOT/core/backend/.venv/bin/python"

listening() {
  lsof -nP -iTCP:"$1" -sTCP:LISTEN >/dev/null 2>&1
}

need_python() {
  if [[ -x "$PY" ]]; then
    return 0
  fi
  echo "后端环境还没装好。在项目里执行一次:"
  echo "  cd core/backend && python3.12 -m venv .venv && .venv/bin/pip install -r requirements.txt"
  exit 1
}

start_backend() {
  need_python
  if listening 8010; then
    echo "后端已经在跑: http://127.0.0.1:8010"
    return 0
  fi
  echo "后端 → http://127.0.0.1:8010"
  cd "$ROOT/core/backend"
  exec "$PY" manage.py runserver 0.0.0.0:8010
}

start_frontend() {
  if listening 5173; then
    echo "前端已经在跑: http://127.0.0.1:5173"
    return 0
  fi
  if [[ ! -d "$ROOT/core/frontend/node_modules" ]]; then
    echo "第一次开前端,先装依赖…"
    npm --prefix "$ROOT/core/frontend" install
  fi
  echo "前端 → http://127.0.0.1:5173"
  cd "$ROOT/core/frontend"
  exec npm run dev
}

case "$MODE" in
  be|backend)
    start_backend
    ;;
  fe|frontend)
    start_frontend
    ;;
  all|dev)
    need_python
    trap 'kill 0' INT TERM
    if listening 8010; then
      echo "后端已经在跑: http://127.0.0.1:8010"
    else
      echo "后端 → http://127.0.0.1:8010"
      (cd "$ROOT/core/backend" && "$PY" manage.py runserver 0.0.0.0:8010) &
    fi
    if listening 5173; then
      echo "前端已经在跑: http://127.0.0.1:5173"
    else
      echo "前端 → http://127.0.0.1:5173"
      (cd "$ROOT/core/frontend" && npm run dev) &
    fi
    wait
    ;;
  *)
    echo "用法: npm run be | npm run fe | npm run dev"
    exit 1
    ;;
esac