package tf

import (
	"fmt"
	"net/http"
	"stat/common/log"
	"strings"

	"github.com/PuerkitoBio/goquery"
)

type Result struct {
	Valid   bool
	Desc    string
	AppName string
	AppIcon string
}

// address: https://testflight.apple.com/join/whsnQnSb
// https://testflight.apple.com/join/M3cBOOzR
func CheckTFValid(address string) (*Result, error) {
	var checkResult Result
	req, err := http.NewRequest("GET", address, nil)
	if err != nil {
		log.Warn("CheckTFValid newRequest", log.Any("address", address), log.E(err))
		checkResult.Desc = err.Error()
		return nil, err
	}
	req.Header.Add("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9")
	req.Header.Add("Accept-Language", "zh-CN,zh;q=0.9,en-US;q=0.8,en;q=0.7,zh-TW;q=0.6")
	req.Header.Add("Cache-Control", "no-cache")
	req.Header.Add("Connection", "keep-alive")
	req.Header.Add("Pragma", "no-cache")
	req.Header.Add("Sec-Fetch-Dest", "document")
	req.Header.Add("Sec-Fetch-Mode", "navigate")
	req.Header.Add("Sec-Fetch-Site", "none")
	req.Header.Add("Sec-Fetch-User", "?1")
	req.Header.Add("Upgrade-Insecure-Requests", "1")
	req.Header.Add("User-Agent", "Mozilla/5.0 (iPhone; CPU iPhone OS 13_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.5 Mobile/15E148 Safari/604.1")
	res, err := http.DefaultClient.Do(req)
	if err != nil {
		log.Warn("CheckTFValid Client Do", log.Any("address", address), log.E(err))
		return nil, err
	}
	defer func() { _ = res.Body.Close() }()
	//不为200 肯定出问题了
	if res.StatusCode != http.StatusOK {
		checkResult.Desc = fmt.Sprintf("HttpStatus:%d", res.StatusCode)
		return &checkResult, nil
	}

	//状态为200，解析内容
	doc, err := goquery.NewDocumentFromReader(res.Body)
	if err != nil {
		log.Warn("CheckTFValid NewDocumentFromReader err", log.Any("address", address), log.E(err))
		return &checkResult, err
	}

	valid, desc := checkValid(doc)
	if !valid {
		checkResult.Desc = desc
		return &checkResult, nil
	}
	appName := getAppName(doc)
	appIcon := getAppIcon(doc)
	checkResult.Valid = true
	checkResult.AppName = appName
	checkResult.AppIcon = appIcon
	return &checkResult, nil
}

func checkValid(doc *goquery.Document) (bool, string) {
	foundStartTesting := false
	doc.Find("a").EachWithBreak(func(i int, s *goquery.Selection) bool {
		text := strings.TrimSpace(s.Text())
		if text == "Start Testing" || text == "开始测试" {
			foundStartTesting = true
			return false
		}
		return true
	})
	if foundStartTesting {
		return true, "" //TF包有效
	}
	betaStatus := ""
	doc.Find(".beta-status").EachWithBreak(func(i int, s *goquery.Selection) bool {
		betaStatus = strings.TrimSpace(s.Text())
		return false
	})
	if betaStatus == "" {
		return true, ""
	}
	if strings.Contains(betaStatus, "install TestFlight") || strings.Contains(betaStatus, "安装 TestFlight") {
		return true, ""
	}

	//TODO: 这里还需要测试，目前来看，出现betaStatus就是无效的
	return false, betaStatus
}

func getAppName(doc *goquery.Document) string {
	var appName string
	doc.Find("title").EachWithBreak(func(i int, selection *goquery.Selection) bool {
		//<title>加入 Beta 版“原创短视频” - TestFlight - Apple</title>
		//<title>Join the READ-O beta - TestFlight - Apple</title>
		v := strings.TrimSpace(selection.Text())
		rawLen := len(v)
		v = strings.TrimPrefix(v, "加入 Beta 版")
		v = strings.TrimPrefix(v, "Join the")
		v = strings.TrimSuffix(v, "beta - TestFlight - Apple")
		v = strings.TrimSuffix(v, "- TestFlight - Apple")
		v = strings.TrimSpace(v)
		v = strings.TrimLeft(v, "“")
		v = strings.TrimRight(v, "”")
		currLen := len(v)

		if rawLen == currLen {
			return true
		}
		appName = v
		return false
	})
	return appName
}

func getAppIcon(doc *goquery.Document) string {
	var iconUrl string
	doc.Find(".app-icon.callout.ios").EachWithBreak(func(i int, selection *goquery.Selection) bool {
		nodes := selection.Nodes
		if len(nodes) == 0 {
			return true
		}
		attrs := selection.Nodes[0].Attr
		for _, attr := range attrs {
			if attr.Key == "style" {
				href := attr.Val
				href = strings.TrimPrefix(href, "background-image: url(")
				href = strings.TrimSuffix(href, ");")
				if len(href) != len(attr.Val) {
					iconUrl = href
					return false
				}
			}
		}
		return true
	})
	return iconUrl
}