package gorequest

import (
	"math/rand"
	"runtime"
	"time"
)

const (
	linux   = "linux"
	windows = "windows"
	mac     = "mac"
)

// GetRandomUserAgent 获取随机UA
func GetRandomUserAgent() string {
	r := rand.New(rand.NewSource(time.Now().UnixNano()))
	return userAgentList[r.Intn(len(userAgentList))]
}

var userAgentList = []string{
	"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36",                   // Chrome 2023-07-06
	"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36 Edg/117.0.2045.31", // Edge 2023-07-06
	"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/117.0",                                                  // Firefox 2023-07-06

	"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36",                   // Chrome 2023-03-22
	"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36 Edg/111.0.1661.51", // Edge 2023-03-22
	"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/111.0",                                          // Firefox 2023-03-22

	"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.0 Safari/605.1.15",                   // Safari 2023-09-18
	"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36",                   // Chrome 2023-09-18
	"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36 Edg/117.0.2045.31", // Edge 2023-09-18
	"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/117.0",                                                    // Firefox 2023-09-18
	"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36 OPR/102.0.0.0",     // Opera 2023-09-18
}

// GetRandomUserAgentSystem 获取系统随机UA
func GetRandomUserAgentSystem() string {
	r := rand.New(rand.NewSource(time.Now().UnixNano()))
	switch runtime.GOOS {
	case linux:
		return userAgentListLinux[r.Intn(len(userAgentListLinux))]
	case windows:
		return userAgentListWindows[r.Intn(len(userAgentListWindows))]
	case mac:
		return userAgentListMac[r.Intn(len(userAgentListMac))]
	default:
		return userAgentListMac[r.Intn(len(userAgentListMac))]
	}
}

var userAgentListWindows = []string{
	"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36",                   // Chrome 2023-07-06
	"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36 Edg/117.0.2045.31", // Edge 2023-07-06
	"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/117.0",                                                  // Firefox 2023-07-06
}

var userAgentListLinux = []string{
	"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36",                   // Chrome 2023-03-22
	"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36 Edg/111.0.1661.51", // Edge 2023-03-22
	"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/111.0",                                          // Firefox 2023-03-22
}

var userAgentListMac = []string{
	"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.0 Safari/605.1.15",                   // Safari 2023-09-18
	"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36",                   // Chrome 2023-09-18
	"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36 Edg/117.0.2045.31", // Edge 2023-09-18
	"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/117.0",                                                    // Firefox 2023-09-18
	"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36 OPR/102.0.0.0",     // Opera 2023-09-18
}