package git

import (
	"fmt"
	"io"
	"os"

	gogit "github.com/go-git/go-git/v5"
)

type GitOptions struct {
	URL              string
	Name             string
	RecurseSubmodule bool
}

func (g *GitOptions) Clone() error {
	a := &gogit.CloneOptions{
		URL:      g.URL,
		Progress: os.Stdout,
	}
	if err := a.Validate(); err != nil {
		return err
	}

	if err := os.Mkdir(g.Name, 0750); err != nil && !os.IsExist(err) {
		return err
	}

	_, err := gogit.PlainClone(g.Name, false, a)
	if err != nil {
		return err
	}

	return nil
}

func (g *GitOptions) Open() (*gogit.Repository, error) {
	return gogit.PlainOpen(g.Name)
}

func (g *GitOptions) Fetch() error {
	repo, err := g.Open()
	if err != nil {
		return err
	}

	a := &gogit.FetchOptions{
		RemoteName: "origin",
		Progress:   os.Stdout,
	}
	if err := a.Validate(); err != nil {
		return err
	}

	if err = repo.Fetch(a); err != nil {
		if err == gogit.NoErrAlreadyUpToDate { // not an actual error
			io.WriteString(os.Stdout, fmt.Sprintln("already up to date")) // keeping this here just for debug
			return nil
		}
		return err
	}

	return nil
}