package distro

import (
	"bufio"
	"net/http"
	"regexp"
	"strings"
	"sync"
)

type Arch struct{}

func (d Arch) GetName() string {
	return "arch"
}

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

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

	// re := regexp.MustCompile(`^#*\s*Server\s*=\s*(\S+)\$repo/os/\$arch`)
	re := regexp.MustCompile(`^#*\s*Server\s*=\s*(\S+?)[^/]+/os/[^/]+/?\s*$`)

	resp, err := http.Get("https://archlinux.org/mirrorlist/all/")
	if err != nil {
		return
	}
	defer resp.Body.Close()

	if resp.StatusCode == http.StatusOK {
		scanner := bufio.NewScanner(resp.Body)
		for scanner.Scan() {
			line := strings.TrimSpace(scanner.Text())
			m := re.FindSubmatch([]byte(line))
			if len(m) > 1 {
				repoMirrors <- RepoMirror{d.GetName(), DefaultRepo, string(m[1])}
			}
		}
	}
}