package systemfs

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

func TestListDirectoriesReturnsSortedDirectoriesAndGitFlag(t *testing.T) {
	root := t.TempDir()
	if err := os.MkdirAll(filepath.Join(root, "b-dir"), 0o755); err != nil {
		t.Fatalf("mkdir b-dir: %v", err)
	}
	if err := os.MkdirAll(filepath.Join(root, "a-dir", ".git"), 0o755); err != nil {
		t.Fatalf("mkdir a-dir/.git: %v", err)
	}
	if err := os.WriteFile(filepath.Join(root, "notes.txt"), []byte("ignored"), 0o644); err != nil {
		t.Fatalf("write notes.txt: %v", err)
	}

	service := NewService()
	listing, err := service.ListDirectories(root)
	if err != nil {
		t.Fatalf("ListDirectories() error = %v", err)
	}

	if listing.Current != root {
		t.Fatalf("current = %q, want %q", listing.Current, root)
	}
	if len(listing.Directories) != 2 {
		t.Fatalf("expected 2 directories, got %#v", listing.Directories)
	}
	if listing.Directories[0].Name != "a-dir" || !listing.Directories[0].IsGit {
		t.Fatalf("unexpected first directory: %#v", listing.Directories[0])
	}
	if listing.Directories[1].Name != "b-dir" || listing.Directories[1].IsGit {
		t.Fatalf("unexpected second directory: %#v", listing.Directories[1])
	}
}

func TestCreateDirectoryRequiresParentAndName(t *testing.T) {
	service := NewService()
	if _, err := service.CreateDirectory("", "child"); err == nil {
		t.Fatal("expected validation error when parent is empty")
	}
	if _, err := service.CreateDirectory("/tmp", ""); err == nil {
		t.Fatal("expected validation error when name is empty")
	}
}

func TestCreateDirectoryCreatesPath(t *testing.T) {
	root := t.TempDir()
	service := NewService()

	path, err := service.CreateDirectory(root, "nested/child")
	if err != nil {
		t.Fatalf("CreateDirectory() error = %v", err)
	}
	if path != filepath.Join(root, "nested/child") {
		t.Fatalf("path = %q", path)
	}
	if info, err := os.Stat(path); err != nil || !info.IsDir() {
		t.Fatalf("expected created directory, stat err=%v info=%#v", err, info)
	}
}