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

# ====== 可改配置 ======
APP_NAME="xinli-server"
PORT="30081"
JAR_NAME="ry-xinli-admin.jar"     # 改成你的实际jar文件名
APP_HOME="$(cd "$(dirname "$0")" && pwd)"
JAR_PATH="${APP_HOME}/${JAR_NAME}"

LOG_DIR="${APP_HOME}/logs"
LOG_FILE="${LOG_DIR}/${APP_NAME}.log"
PID_FILE="${APP_HOME}/${APP_NAME}.pid"

JAVA_OPTS="-Xms512m -Xmx1024m -Dfile.encoding=UTF-8"
SPRING_OPTS="--server.port=${PORT} --server.address=0.0.0.0"

# 如果你走 Python RAG（可选）
export RAG_PYTHON_URL="${RAG_PYTHON_URL:-http://127.0.0.1:5000}"
# ======================

mkdir -p "${LOG_DIR}"

echo "[1/4] 检查 jar 是否存在：${JAR_PATH}"
if [[ ! -f "${JAR_PATH}" ]]; then
  echo "ERROR: jar 不存在：${JAR_PATH}"
  exit 1
fi

kill_by_port() {
  local port="$1"
  local pids=""

  # 优先用 lsof
  if command -v lsof >/dev/null 2>&1; then
    pids="$(lsof -ti tcp:${port} 2>/dev/null || true)"
  # 再用 ss（大多数 Linux 有）
  elif command -v ss >/dev/null 2>&1; then
    # 从 ss 输出里提取 pid=xxxx
    pids="$(ss -lntp 2>/dev/null | awk -v p=":${port}" '$4 ~ p {print $0}' | sed -n 's/.*pid=\\([0-9]\\+\\).*/\\1/p' | sort -u)"
  # 再用 netstat（老系统）
  elif command -v netstat >/dev/null 2>&1; then
    pids="$(netstat -lntp 2>/dev/null | awk -v p=":${port}" '$4 ~ p {print $7}' | cut -d/ -f1 | grep -E '^[0-9]+$' | sort -u)"
  else
    echo "ERROR: 找不到 lsof/ss/netstat，无法通过端口查进程。请先安装 lsof（推荐）。"
    exit 1
  fi

  if [[ -n "${pids}" ]]; then
    echo "[2/4] 端口 ${port} 被占用，准备杀进程：${pids}"
    for pid in ${pids}; do
      echo " - kill ${pid}"
      kill "${pid}" 2>/dev/null || true
    done

    # 等待退出，最多 10 秒
    for _ in {1..10}; do
      sleep 1
      local still=""
      if command -v lsof >/dev/null 2>&1; then
        still="$(lsof -ti tcp:${port} 2>/dev/null || true)"
      elif command -v ss >/dev/null 2>&1; then
        still="$(ss -lntp 2>/dev/null | awk -v p=":${port}" '$4 ~ p {print $0}' | sed -n 's/.*pid=\\([0-9]\\+\\).*/\\1/p' | sort -u)"
      elif command -v netstat >/dev/null 2>&1; then
        still="$(netstat -lntp 2>/dev/null | awk -v p=":${port}" '$4 ~ p {print $7}' | cut -d/ -f1 | grep -E '^[0-9]+$' | sort -u)"
      fi
      [[ -z "${still}" ]] && break
    done

    # 如果还占用就强杀
    if command -v lsof >/dev/null 2>&1; then
      pids="$(lsof -ti tcp:${port} 2>/dev/null || true)"
    fi
    if [[ -n "${pids}" ]]; then
      echo "端口仍被占用，强制 kill -9：${pids}"
      for pid in ${pids}; do
        kill -9 "${pid}" 2>/dev/null || true
      done
    fi
  else
    echo "[2/4] 端口 ${port} 未占用"
  fi
}

stop_by_pidfile() {
  if [[ -f "${PID_FILE}" ]]; then
    local pid
    pid="$(cat "${PID_FILE}" || true)"
    if [[ -n "${pid}" ]] && kill -0 "${pid}" >/dev/null 2>&1; then
      echo "[2/4] 发现旧 PID_FILE：${PID_FILE} (pid=${pid})，先停止旧进程"
      kill "${pid}" 2>/dev/null || true
      sleep 2
      kill -9 "${pid}" 2>/dev/null || true
    fi
    rm -f "${PID_FILE}" >/dev/null 2>&1 || true
  fi
}

echo "[2/4] 停止旧进程（先按 PID_FILE，再按端口）"
stop_by_pidfile
kill_by_port "${PORT}"

echo "[3/4] 启动应用（日志：${LOG_FILE}）"
nohup java ${JAVA_OPTS} -jar "${JAR_PATH}" ${SPRING_OPTS} >> "${LOG_FILE}" 2>&1 &
echo $! > "${PID_FILE}"
echo "已启动：pid=$(cat "${PID_FILE}")"

echo "[4/4] 等待端口 ${PORT} 监听（最多 30 秒）"
for i in {1..30}; do
  if command -v ss >/dev/null 2>&1; then
    if ss -lnt | awk '{print $4}' | grep -q ":${PORT}\$"; then
      echo "OK：端口已监听。"
      echo "查看日志：tail -f ${LOG_FILE}"
      exit 0
    fi
  else
    # 没有 ss 就不硬等，提示用户看日志
    break
  fi
  sleep 1
done

echo "WARN：30 秒内未检测到端口监听，请查看日志排查：${LOG_FILE}"
exit 1