package gitfacade

import (
	"testing"
	"time"

	"github.com/go-git/go-billy/v5/memfs"
	"github.com/go-git/go-git/v5"
	"github.com/go-git/go-git/v5/plumbing"
	"github.com/go-git/go-git/v5/plumbing/object"
	"github.com/go-git/go-git/v5/storage/memory"
	"github.com/stretchr/testify/require"
)

func commit(t *testing.T, r *git.Repository, parentHash plumbing.Hash, issue string) plumbing.Hash {
	wt, err := r.Worktree()
	require.NoError(t, err)

	rm, err := wt.Filesystem.Create("foo.txt")
	require.NoError(t, err)

	_, err = rm.Write([]byte("foo text"))
	require.NoError(t, err)

	_, err = wt.Add("foo.txt")
	require.NoError(t, err)

	author := object.Signature{
		Name:  "go-git",
		Email: "go-git@fake.local",
		When:  time.Now(),
	}
	hash, err := wt.Commit(issue+" test commit message", &git.CommitOptions{
		All:       true,
		Author:    &author,
		Committer: &author,
		Parents:   []plumbing.Hash{parentHash},
	})
	require.NoError(t, err)
	return hash
}

func TestGit(t *testing.T) {
	repo, err := git.Init(memory.NewStorage(), memfs.New())
	require.NoError(t, err)
	hash := commit(t, repo, plumbing.ZeroHash, "BRC-1") // initial commit

	h, err := repo.Head()
	require.NoError(t, err)
	require.Equal(t, hash, h.Hash())

	commitIter, err := repo.Log(&git.LogOptions{From: plumbing.ZeroHash})
	require.NoError(t, err)
	commits := make([]string, 0)
	err = commitIter.ForEach(func(c *object.Commit) error {
		commits = append(commits, c.Message)
		return nil
	})
	require.NoError(t, err)
	require.Equal(t, 1, len(commits))
}