package zhimeng

import (
	"crypto/tls"
	"fmt"
	"net/http"
	"regexp"
	"strings"

	"github.com/gocolly/colly"
)

// ScrapJDDetailImageList is scarp detail images list
func ScrapJDDetailImageList(gid string) ([]string, error) {
	var list []string
	rurl := "https://wqsitem.jd.com/detail/%s_d%s_normal.html"

	c := colly.NewCollector(
		colly.UserAgent("Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.105 Safari/537.36"),
	)
	c.WithTransport(&http.Transport{
		TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
	})
	c.OnResponse(func(r *colly.Response) {
		re, _ := regexp.Compile(`[a-zA-z]+://[^\s]*`)
		body := r.Body
		// debug
		// fmt.Println(string(body))
		urls := re.FindAllString(string(body), -1)
		// fmt.Println(urls)
		ree, _ := regexp.Compile(`[a-zA-z]+://[^\s]*.jpg`)
		for _, url := range urls {
			if strings.Contains(url, `.jpg\`) {
				img := ree.FindString(url)
				list = append(list, img)
			}

		}
	})
	c.OnRequest(func(r *colly.Request) {
	})

	if err := c.Visit(fmt.Sprintf(rurl, gid, gid)); err != nil {
		return nil, err
	}
	// debug
	// fmt.Println(gid)
	// fmt.Println(list)
	return list, nil
}

func strip(ss string, charss string) string {
	s, chars := []rune(ss), []rune(charss)
	length := len(s)
	max := len(s) - 1
	l, r := true, true //标记当左端或者右端找到正常字符后就停止继续寻找
	start, end := 0, max
	tmpEnd := 0
	charset := make(map[rune]bool) //创建字符集，也就是唯一的字符，方便后面判断是否存在
	for i := 0; i < len(chars); i++ {
		charset[chars[i]] = true
	}
	for i := 0; i < length; i++ {
		if _, exist := charset[s[i]]; l && !exist {
			start = i
			l = false
		}
		tmpEnd = max - i
		if _, exist := charset[s[tmpEnd]]; r && !exist {
			end = tmpEnd
			r = false
		}
		if !l && !r {
			break
		}
	}
	if l && r { // 如果左端和右端都没找到正常字符，那么表示该字符串没有正常字符
		return ""
	}
	return string(s[start : end+1])
}