package distro

import (
	"strings"
	"sync"

	"github.com/gocolly/colly"
)

type Alpine struct{}

func (d Alpine) GetName() string {
	return "alpine"
}

func (d Alpine) GetRepos() []string {
	return []string{DefaultRepo}
}

func (d Alpine) FetchMirrors(repos []string, repoMirrors chan<- RepoMirror, done *sync.WaitGroup) {
	defer done.Done()

	c := colly.NewCollector(
		colly.AllowedDomains("mirrors.alpinelinux.org"),
	)

	c.OnHTML("div.mirrors table a", func(h *colly.HTMLElement) {
		url := h.Attr("href")
		if strings.HasPrefix(url, "http:") || strings.HasPrefix(url, "https:") || strings.HasPrefix(url, "ftp:") {
			if !strings.HasSuffix(url, "/") {
				url += "/"
			}
			repoMirrors <- RepoMirror{d.GetName(), DefaultRepo, url}
		}
	})

	c.Visit("https://mirrors.alpinelinux.org/")
	c.Wait()
}