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

# 恢复并启动 frp 服务
# 该脚本自动检测已安装的 frp 服务 (客户端/服务端) 并恢复其运行和开机自启
# 用法：curl -fsSL "https://pan.shumengya.top/d/scripts/frp/start_frp.sh" | sudo bash

SERVICE_FRPC="smy-frpc"
SERVICE_FRPS="smy-frps"

log() { printf '[frp-启动] %s\n' "$*" >&2; }
fail() { log "错误: $*" >&2; exit 1; }

# 检查 root 权限
if [ "${EUID:-$(id -u)}" -ne 0 ]; then
    fail "请使用 root 权限运行"
fi

start_service() {
    local svc=$1
    local service_file="/etc/systemd/system/${svc}.service"

    if [ -f "$service_file" ]; then
        log "检测到已安装服务: $svc"
        
        # 重置失败状态
        systemctl reset-failed "$svc" 2>/dev/null || true
        
        log "正在启用并启动 $svc..."
        systemctl enable --now "$svc"
        
        sleep 1
        
        if systemctl is-active --quiet "$svc"; then
            log "✔ $svc 启动成功 (状态: $(systemctl is-active "$svc"))"
        else
            log "✘ $svc 启动失败"
            systemctl status "$svc" --no-pager -n 5 || true
        fi
    else
        # 仅在调试时显示，避免干扰普通用户
        # log "未检测到 $svc，跳过"
        :
    fi
}

log "正在扫描并恢复 frp 服务..."

found_any=false
if [ -f "/etc/systemd/system/${SERVICE_FRPC}.service" ]; then
    start_service "$SERVICE_FRPC"
    found_any=true
fi

if [ -f "/etc/systemd/system/${SERVICE_FRPS}.service" ]; then
    start_service "$SERVICE_FRPS"
    found_any=true
fi

if [ "$found_any" = false ]; then
    log "未检测到任何已安装的 frp 服务 (smy-frpc 或 smy-frps)。"
    log "请先运行安装脚本进行安装。"
    exit 1
fi

log "操作完成。"