from pathlib import Path

from app.backup.service import BackupService


def test_backup_and_restore_roundtrip(tmp_path: Path) -> None:
    data_dir = tmp_path / "data"
    backup_dir = data_dir / "backups"
    data_dir.mkdir(parents=True)
    sample_file = data_dir / "settings.json"
    sample_file.write_text('{"scene":"base"}', encoding="utf-8")

    service = BackupService(data_dir=data_dir, backup_dir=backup_dir)
    created = service.create_backup("audit-backup")

    sample_file.write_text('{"scene":"modified"}', encoding="utf-8")
    service.restore_backup(created.id)

    assert sample_file.read_text(encoding="utf-8") == '{"scene":"base"}'
    assert any(item.label == "audit-backup" for item in service.list_backups())


def test_restore_empty_backup_clears_runtime_files(tmp_path: Path) -> None:
    data_dir = tmp_path / "data"
    backup_dir = data_dir / "backups"
    data_dir.mkdir(parents=True)

    service = BackupService(data_dir=data_dir, backup_dir=backup_dir)
    empty_backup = service.create_backup("empty-runtime")

    sample_file = data_dir / "settings.json"
    sample_file.write_text('{"scene":"modified"}', encoding="utf-8")
    service.restore_backup(empty_backup.id)

    assert not sample_file.exists()