package services

import (
	"fmt"
	"os"
	"path/filepath"
	"strconv"

	"gitea.com/gitea/pr-deployer/pkgs/settings"

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

func UpdateAndStartPullRequest(number int) error {
	// 1 download the git
	p := filepath.Join(settings.CodeCacheDir, strconv.Itoa(number))
	fmt.Println("clone code into", p)

	// 1.1 git fetch origin +refs/heads/main
	// 1.2 git checkout main
	// 1.3 git fetch origin refs/pull/17422/head
	// 1.4 git merge <xxxxxx>

	st, err := os.Stat(p)
	if err != nil {
		if os.IsNotExist(err) {
			_, err = git.PlainClone(p, false, &git.CloneOptions{
				URL:             "https://github.com/go-gitea/gitea",
				InsecureSkipTLS: false,
				ReferenceName:   plumbing.NewRemoteReferenceName("", fmt.Sprintf("refs/pull/%d/head", number)),
				SingleBranch:    true,
			})
			if err != nil {
				return err
			}
		}
		return err
	}
	if !st.IsDir() {
		return fmt.Errorf("%s is a file but not a dir", p)
	}

	_, err = git.PlainOpen(p)
	if err != nil {
		return err
	}

	// 2 build

	// 3 change domain

	// 4 chagne reverse server

	// 5 send commit status

	return nil
}

func StopPullRequest(number int) error {
	return nil
}