package git

import (
	"errors"
	"os"
	"path/filepath"
	"testing"

	"github.com/go-git/go-git/v5"
	"github.com/stretchr/testify/assert"
)

func TestIsClean(t *testing.T) {
	isClean, err := IsClean("/tmp")
	assert.Equal(t, isClean, false)
	assert.True(t, errors.Is(err, git.ErrRepositoryNotExists))
}

// TestIsCleanIgnoresAbraSource confirms that the .abra-source sidecar
// file written by abra next to externally-cloned recipes does not cause
// IsClean to report the worktree as dirty.
func TestIsCleanIgnoresAbraSource(t *testing.T) {
	dir := t.TempDir()

	if _, err := git.PlainInit(dir, false); err != nil {
		t.Fatalf("git init failed: %s", err)
	}

	sidecar := filepath.Join(dir, ".abra-source")
	if err := os.WriteFile(sidecar, []byte("git.example.com/u/recipe\n"), 0o644); err != nil {
		t.Fatalf("writing sidecar failed: %s", err)
	}

	isClean, err := IsClean(dir)
	if err != nil {
		t.Fatalf("IsClean returned error: %s", err)
	}
	assert.True(t, isClean, "expected worktree with only .abra-source to be reported clean")

	// Sanity check: an unrelated untracked file should still mark it dirty.
	other := filepath.Join(dir, "random.txt")
	if err := os.WriteFile(other, []byte("hello"), 0o644); err != nil {
		t.Fatalf("writing extra file failed: %s", err)
	}

	isClean, err = IsClean(dir)
	if err != nil {
		t.Fatalf("IsClean returned error: %s", err)
	}
	assert.False(t, isClean, "expected worktree with unrelated untracked file to be reported dirty")
}