import pytest

from viano_bug_analysis.package import PackageReader, PackageReadError


def test_read_only_and_filename_independent(make_package):
    path = make_package(entries={"unknown/data.bin": b"\x00\xff"})
    before = path.read_bytes()
    renamed = path.with_name("different.name")
    path.rename(renamed)
    with PackageReader(renamed) as reader:
        assert reader.manifest["package_id"] == "stable-package"
        assert reader.read_bytes("unknown/data.bin") == b"\x00\xff"
        modified = reader.manifest
        modified["case_id"] = "changed"
        assert reader.manifest["case_id"] == "case-A"
        with pytest.raises(PackageReadError):
            reader.read_bytes("../outside")
    assert renamed.read_bytes() == before
    with pytest.raises(RuntimeError):
        reader.read_bytes("manifest.json")


def test_reader_rejection_and_cleanup(make_package):
    reader = PackageReader(make_package(raw=b"{}"))
    with pytest.raises(PackageReadError) as error:
        with reader:
            pytest.fail("Invalid package opened")
    assert not error.value.result.valid
    assert reader._source is None


def test_reader_missing_file(tmp_path):
    with pytest.raises(PackageReadError):
        with PackageReader(tmp_path / "absent"):
            pass