package main

import (
	"errors"
	"io/fs"
	"os"

	"github.com/charmbracelet/log"
	"github.com/go-git/go-billy/v5/osfs"
	"github.com/go-git/go-git/v5"
	"github.com/go-git/go-git/v5/plumbing/cache"
	"github.com/go-git/go-git/v5/storage/filesystem"
)

func getRepo(url string, path string) (*git.Repository, error) {
	_, err := os.Stat(path)

	if err == nil {
		log.Info("Retrieve existing repo")
		fs := osfs.New(path)
		if _, err := fs.Stat(git.GitDirName); err == nil {
			fs, err = fs.Chroot(git.GitDirName)
			CheckIfError(err)
		}

		s := filesystem.NewStorageWithOptions(fs, cache.NewObjectLRUDefault(), filesystem.Options{KeepDescriptors: true})
		repo, err := git.Open(s, fs)
		defer s.Close()
		return repo, err

	} else if errors.Is(err, fs.ErrNotExist) {
		log.Info("Clone repo from " + url + " to " + path)
		repo, err := git.PlainClone(path, false, &git.CloneOptions{
			URL: url,
		})
		CheckIfError(err)
		worktree, err := repo.Worktree()
		_ = worktree.Pull(&git.PullOptions{RemoteName: "origin"})
		return repo, err

	} else {
		return nil, err
	}
}