#!/bin/sh
set -eu

APP_NAME="led-manager"
APP_DIR="/opt/led-manager"
PORT="${PORT:-8088}"
HOST="${HOST:-0.0.0.0}"
RAW_BASE="${RAW_BASE:-https://gitea.chickliu.fun/Hermes/led-manager-panel/raw/branch/main}"

need_root() {
  if [ "$(id -u)" != "0" ]; then
    echo "请用 root 运行：su - 或 sudo sh install.sh" >&2
    exit 1
  fi
}

has_cmd() { command -v "$1" >/dev/null 2>&1; }

download() {
  url="$1"
  out="$2"
  if has_cmd curl; then
    curl -fsSL "$url" -o "$out"
  elif has_cmd wget; then
    wget -qO "$out" "$url"
  else
    echo "缺少 curl/wget，无法下载 $url" >&2
    exit 1
  fi
}

install_python_if_possible() {
  if has_cmd python3; then return 0; fi
  echo "未发现 python3，尝试安装..."
  if has_cmd opkg; then
    opkg update
    opkg install python3
  elif has_cmd apt-get; then
    apt-get update
    apt-get install -y python3
  else
    echo "未发现 opkg/apt-get，请先手动安装 python3" >&2
    exit 1
  fi
}

install_openwrt_service() {
  echo "检测到 OpenWrt/procd，安装 /etc/init.d/$APP_NAME"
  download "$RAW_BASE/led-manager.openwrt.init" "/etc/init.d/$APP_NAME"
  chmod +x "/etc/init.d/$APP_NAME"
  # Patch host/port in init script if env overrides were provided.
  sed -i "s/^HOST=.*/HOST=$HOST/" "/etc/init.d/$APP_NAME" || true
  sed -i "s/^PORT=.*/PORT=$PORT/" "/etc/init.d/$APP_NAME" || true
  "/etc/init.d/$APP_NAME" enable
  "/etc/init.d/$APP_NAME" restart || "/etc/init.d/$APP_NAME" start
  "/etc/init.d/$APP_NAME" status || true
}

install_systemd_service() {
  echo "检测到 systemd，安装 led-manager.service"
  download "$RAW_BASE/led-manager.service" "/etc/systemd/system/$APP_NAME.service"
  # Patch host/port in service if env overrides were provided.
  sed -i "s/--host [^ ]* --port [0-9]*/--host $HOST --port $PORT/" "/etc/systemd/system/$APP_NAME.service" || true
  systemctl daemon-reload
  systemctl enable --now "$APP_NAME"
  systemctl restart "$APP_NAME"
  systemctl status "$APP_NAME" --no-pager || true
}

need_root
install_python_if_possible
mkdir -p "$APP_DIR"
download "$RAW_BASE/led_panel.py" "$APP_DIR/led_panel.py"
chmod +x "$APP_DIR/led_panel.py"

if [ -x /sbin/procd ] || [ -d /etc/rc.d ] && has_cmd procd; then
  install_openwrt_service
elif has_cmd systemctl && [ -d /run/systemd/system ]; then
  install_systemd_service
elif [ -d /etc/init.d ] && [ -f /etc/openwrt_release ]; then
  install_openwrt_service
else
  echo "未检测到 systemd/procd，已安装到 $APP_DIR。手动启动："
  echo "python3 $APP_DIR/led_panel.py --host $HOST --port $PORT"
fi

ipaddr="$(hostname -I 2>/dev/null | awk '{print $1}' || true)"
echo
echo "安装完成。"
echo "访问地址： http://${ipaddr:-设备IP}:$PORT/"
echo "如需修改端口：PORT=8090 sh install.sh"