package publish

import (
	"log/slog"
	"path"
	"regexp"
)

func (p *Provider) GetShaSums() (ShaSums, error) {
	return GetShaSumContents(p.DistPath, p.RepoName, p.Version)
}

type ShaSums []ShaSum
type ShaSum struct {
	Sum  string
	Path string
}

func GetShaSumContents(distPath, repoName, version string) (ShaSums, error) {
	shaSumFileName := repoName + "_" + version + "_SHA256SUMS"
	shaSumPath := path.Join(distPath, shaSumFileName)

	shaSumLine, err := ReadFile(shaSumPath)
	if err != nil {
		return nil, err
	}

	regEx := regexp.MustCompile(`([0-9a-fA-F]+)\s+(.+)`)
	shaSums := ShaSums{}
	for _, line := range shaSumLine {
		matches := regEx.FindAllStringSubmatch(line, -1)
		if len(matches) < 1 {
			slog.Warn("unable to parse SHA sum line", "line", line)
			continue
		}
		shaSums = append(shaSums, ShaSum{Sum: matches[0][1], Path: matches[0][2]})
	}
	return shaSums, nil
}