package licence

import (
	"sort"
	"strconv"
	"strings"

	"github.com/shirou/gopsutil/cpu"
	psnet "github.com/shirou/gopsutil/net"
	// "github.com/shirou/gopsutil/host"
	// "github.com/shirou/gopsutil/disk"
)

func GetMachineCode() string {
	var machineInfo []string

	// CPU
	if cnt, err := cpu.Counts(true); err == nil {
		machineInfo = append(machineInfo, "cpuCounts:"+strconv.Itoa(cnt))
		if cnt > 0 {
			if c, err := cpu.Info(); err == nil {
				machineInfo = append(machineInfo, "cpuModelName:"+c[0].ModelName)
			}
		}
	}

	/* // Disk
	if diskInfo, err := disk.Partitions(false); err == nil {
		for _, d := range diskInfo {
			diskSerialNumber := disk.GetDiskSerialNumber(d.Device)
			machineInfo = append(machineInfo, diskSerialNumber)
	 	}
	}

	// Host
	if host, err := host.Info(); err == nil {
		machineInfo = append(machineInfo, host.HostID)
	}*/

	// Net
	if net, err := psnet.Interfaces(); err == nil {
		for _, n := range net {
			if n.MTU == 1500 && !VNetFilter(&n) {
				machineInfo = append(machineInfo, "mac:"+n.HardwareAddr)
			}
		}
	}

	sort.Strings(machineInfo)

	return GetMd5String(strings.Join(machineInfo, "-|-"), true, false)
}

func VNetFilter(iface *psnet.InterfaceStat) bool {
	if iface.HardwareAddr == "" {
		return true
	}

	vNetNamePrefix := [...]string{
		"docker",
		"br-",
		"veth",
		"Npcap",
		"VirtualBox",
	}

	for _, v := range vNetNamePrefix {
		if strings.HasPrefix(iface.Name, v) {
			return true
		}
	}

	/* 暂时放弃过滤虚拟机MAC，会导致运行在虚拟机时，机器码不包含MAC地址的问题。如果不允许服务运行在虚拟机，再启用并提示警告
	vNetAddrPrefix := [...]string{
		"00:05:69", //vmware1
		"00:0C:29", //vmware2
		"00:50:56", //vmware3
		"00:1c:14", //vmware4
		"00:1C:42", //parallels1
		"00:03:FF", //microsoft virtual pc
		"00:0F:4B", //virtual iron 4
		"00:16:3E", //red hat xen , oracle vm , xen source, novell xen
		"08:00:27", //virtualbox
	}

	for _, v := range vNetAddrPrefix {
		if strings.HasPrefix(iface.HardwareAddr, v) {
			return true
		}
	}
	*/

	return false
}