#!/usr/bin/env bash
# 安装 systemd 服务，实现 zTools2 持久化部署（开机自启 + 崩溃自动重启）。
#
# 做的事：
#   1. 用实际路径填充 deploy/ztools2.service 模板，写入 /etc/systemd/system/
#   2. 停掉旧方式（start.sh 启动的 uvicorn），避免端口冲突
#   3. systemctl daemon-reload + enable + start
#
# 用法：./deploy/install-systemd.sh
# 卸载：systemctl disable --now ztools2 && rm /etc/systemd/system/ztools2.service && systemctl daemon-reload
set -euo pipefail

cd "$(dirname "$0")/.."
ROOT="$(pwd)"

# 解析 uvicorn 可执行路径：优先 .venv（setup.sh 标准），回退系统 python -m uvicorn
if [[ -x "$ROOT/.venv/bin/uvicorn" ]]; then
  UVICORN="$ROOT/.venv/bin/uvicorn"
  PYBIN="$ROOT/.venv/bin/python"
elif command -v uvicorn >/dev/null 2>&1; then
  UVICORN="$(command -v uvicorn)"
  PYBIN="$(command -v python3)"
else
  echo "未找到 uvicorn：请先运行 ./setup.sh（建 .venv）或 pip install uvicorn" >&2
  exit 1
fi
[[ -f "$ROOT/config.yaml" ]] || { echo "未找到 config.yaml，请先运行 ./setup.sh" >&2; exit 1; }

UNIT_SRC="$ROOT/deploy/ztools2.service"
UNIT_DST="/etc/systemd/system/ztools2.service"

echo "==> 生成 systemd unit（路径 $ROOT，uvicorn=$UVICORN）"
# 同时填充 ROOT 与 UVICORN；PYBIN 备用（ExecStart 用 UVICORN 直接启动）
sudo sed -e "s|__ZTOOLS2_DIR__|$ROOT|g" -e "s|__UVICORN__|$UVICORN|g" "$UNIT_SRC" > /tmp/ztools2.service
sudo mv /tmp/ztools2.service "$UNIT_DST"
sudo chmod 644 "$UNIT_DST"

echo "==> 停止旧方式（start.sh 启动的进程，若有）"
./stop.sh >/dev/null 2>&1 || true

echo "==> 启用并启动 ztools2 服务"
sudo systemctl daemon-reload
sudo systemctl enable ztools2
sudo systemctl restart ztools2

sleep 2
if systemctl is-active --quiet ztools2; then
  echo "✓ ztools2 已启动并设为开机自启"
  echo "  状态：systemctl status ztools2"
  echo "  日志：journalctl -u ztools2 -f"
  echo "  停止：sudo systemctl stop ztools2"
  echo "  重启：sudo systemctl restart ztools2"
else
  echo "✗ ztools2 启动失败，查看日志：journalctl -u ztools2 -n 50" >&2
  exit 1
fi