package api

import (
	"box-cost/conf"
	"crypto/hmac"
	"crypto/sha256"
	"fmt"
	"net/http"
	"time"

	"github.com/gin-gonic/gin"
	"github.com/shirou/gopsutil/net"
)

func Mac(r *GinRouter) {
	r.GET("/mac/info", MacInfo)
	r.POST("/get/code", GetCode)
}

type DeviceInfo struct {
	DeviceId   string
	CreateTime time.Time
	AppName    string
	AppVersion string
}

const SECRET_KEY = "DFDFEXVEG"

func MacInfo(c *gin.Context, apictx *ApiSession) (interface{}, error) {
	fmt.Println(conf.AppConfig.Name)
	interfaces, err := net.Interfaces()
	if err != nil {
		return nil, err
	}
	macAddr := getRealMacAddr(interfaces)
	deviceInfo := &DeviceInfo{
		DeviceId:   UtilMd5(macAddr),
		AppName:    "Toolchain",
		AppVersion: "v1.0.0",
		CreateTime: time.Now(),
	}

	return deviceInfo, nil
}

func GetCode(c *gin.Context, apictx *ApiSession) (interface{}, error) {
	deviceId := c.Query("deviceId")
	if len(deviceId) < 1 {
		fmt.Println("deviceId 为空")
		c.String(http.StatusOK, "err")
		return nil, nil
	}
	key := []byte(SECRET_KEY)
	message := []byte(deviceId) // 待签名的消息

	// 创建一个 HMAC-SHA256 实例
	h := hmac.New(sha256.New, key)

	// 写入消息
	h.Write(message)

	// 计算签名
	signature := h.Sum(nil)
	fmt.Printf("%x\n", signature)
	// fmt.Println(len("86068c837d554c8aba4f997b51be6bc209b68cdad7c5a4a0adccbfc289adf4a2"))
	// fmt.Println(len("63e208dc7452ab74932b9e37"))
	// fmt.Println(len(UtilMd5(mac)))

	// 输出签名结果
	c.String(http.StatusOK, fmt.Sprintf("%x", signature))
	return nil, nil

}

// b0:6e:bf:c5:32:30
func getRealMacAddr(netInterfaces []net.InterfaceStat) string {
	loindex := 0
	for _, netInterface := range netInterfaces {
		if netInterface.Name == "lo" {
			loindex = netInterface.Index
			break
		}
	}
	if len(netInterfaces) < loindex+1 {
		return ""
	}
	return netInterfaces[loindex].HardwareAddr
}