package runner

import (
	"path/filepath"
	"sort"
	"testing"
)

func TestFdListFiles(t *testing.T) {
	dir := t.TempDir()
	writeTempFile(t, dir, "foo_old.txt", "")
	writeTempFile(t, dir, "foo_backup.txt", "")
	writeTempFile(t, dir, "keep.txt", "")

	files, err := FdListFiles("foo", dir)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if len(files) != 2 {
		t.Fatalf("want 2 files, got %d: %v", len(files), files)
	}
	sort.Strings(files)
	if filepath.Base(files[0]) != "foo_backup.txt" || filepath.Base(files[1]) != "foo_old.txt" {
		t.Errorf("unexpected files: %v", files)
	}
}

func TestFdListFiles_NoMatches(t *testing.T) {
	dir := t.TempDir()
	writeTempFile(t, dir, "keep.txt", "")

	files, err := FdListFiles("no_match_pattern_xyz", dir)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if len(files) != 0 {
		t.Errorf("want 0 files, got %v", files)
	}
}

func TestFdListFiles_TypeFilter(t *testing.T) {
	dir := t.TempDir()
	writeTempFile(t, dir, "foo_file.txt", "")

	// With --type f should find the file
	files, err := FdListFiles("foo", dir, "--type", "f")
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if len(files) != 1 || filepath.Base(files[0]) != "foo_file.txt" {
		t.Errorf("want [foo_file.txt], got %v", files)
	}
}