// util
package common

import (
	"net"
	"net/http"
	"strings"
)

//获取平台类型
func GetOS(useros string) string {
	osVersion := "其他"
	if strings.Contains(useros, "NT 6.0") {
		osVersion = "Windows Vista/Server 2008"
	} else if strings.Contains(useros, "NT 5.2") {
		osVersion = "Windows Server 2003"
	} else if strings.Contains(useros, "NT 5.1") {
		osVersion = "Windows XP"
	} else if strings.Contains(useros, "NT 5") {
		osVersion = "Windows 2000"
	} else if strings.Contains(useros, "Mac") {
		osVersion = "Mac"
	} else if strings.Contains(useros, "Unix") {
		osVersion = "UNIX"
	} else if strings.Contains(useros, "Linux") {
		osVersion = "Linux"
	} else if strings.Contains(useros, "SunOS") {
		osVersion = "SunOS"
	} else if strings.Contains(useros, "NT 6.3") {
		osVersion = "Window8"
	} else if strings.Contains(useros, "NT 6.1") {
		osVersion = "Window7"
	} else if strings.Contains(useros, "NT 10.0") {
		osVersion = "Window10"
	}
	return osVersion
}

//获取浏览器类型
func GetBrowse(userbrowser string) string {
	browserVersion := "其他"
	if strings.Contains(userbrowser, "MSIE") {
		browserVersion = "IE"
	} else if strings.Contains(userbrowser, "Firefox") {
		browserVersion = "Firefox"
	} else if strings.Contains(userbrowser, "Chrome") {
		browserVersion = "Chrome"
	} else if strings.Contains(userbrowser, "Safari") {
		browserVersion = "Safari"
	} else if strings.Contains(userbrowser, "rv:11.0") {
		browserVersion = "IE11"
	}
	return browserVersion
}

//获取ip
func GetIp(req *http.Request) string {
	if req == nil {
		return ""
	}
	ip_for := req.Header.Get("x-forwarded-for")
	ip_client := req.Header.Get("http_client_ip")
	ip_addr := req.Header.Get("Remote_addr")
	un := "unknown"
	if (ip_for != un) && (len(strings.TrimSpace(ip_for)) > 0) {
		return ip_for
	}
	if (ip_client != un) && (len(strings.TrimSpace(ip_client)) > 0) {
		return ip_client
	}
	if (ip_addr != un) && (len(strings.TrimSpace(ip_addr)) > 0) {
		return ip_addr
	}
	ip, _, _ := net.SplitHostPort(req.RemoteAddr)
	return ip
}