package collector

import (
	"os/exec"
	"strconv"
	"strings"
	"time"
)

func CollectOPNsenseVersion() string {
	out, err := exec.Command("/usr/local/sbin/opnsense-version").Output()
	if err != nil {
		return ""
	}
	// Format: "OPNsense 24.1.1_1" - alles nach erstem Leerzeichen
	s := strings.TrimSpace(string(out))
	return s
}

func CollectFreeBSDVersion() string {
	out, err := exec.Command("/bin/freebsd-version").Output()
	if err != nil {
		return sysctlGet("kern.osrelease")
	}
	return strings.TrimSpace(string(out))
}

func CollectHostname() string {
	return sysctlGet("kern.hostname")
}

func CollectUptime() int64 {
	// kern.boottime: { sec = 1706000000, usec = 0 } ... oder "sec = 1706000000"
	out := sysctlGet("kern.boottime")
	if out == "" {
		return 0
	}

	// Parse "{ sec = TIMESTAMP, usec = ... }"
	idx := strings.Index(out, "sec = ")
	if idx == -1 {
		return 0
	}

	numStr := out[idx+6:]
	if commaIdx := strings.IndexAny(numStr, ", }"); commaIdx != -1 {
		numStr = numStr[:commaIdx]
	}
	numStr = strings.TrimSpace(numStr)

	bootTime, err := strconv.ParseInt(numStr, 10, 64)
	if err != nil {
		return 0
	}

	uptime := time.Now().Unix() - bootTime
	if uptime < 0 {
		return 0
	}
	return uptime
}