"""Envelope tests for apply, apply_patch, archive."""
from __future__ import annotations
from collections.abc import Mapping
import json, pathlib
import pytest
from tests.cli_test_helper import CliRunner
runner = CliRunner()

_FIELDS = ("muse_version", "schema", "timestamp", "warnings")

def _has_envelope(d: Mapping[str, object]) -> None:
    for f in _FIELDS:
        assert f in d, f"missing {f}"
    assert "schema_version" not in d

class TestApplyEnvelope:
    def test_apply_json(self, tmp_path: pathlib.Path) -> None:
        fake = tmp_path / "fake.patch"
        fake.write_text("# fake patch\n")
        r = runner.invoke(None, ["apply", str(fake), "--json"])
        # may fail with user error but must emit JSON
        try:
            d = json.loads(r.output)
            _has_envelope(d)
        except (json.JSONDecodeError, AssertionError):
            pytest.skip("apply errored before JSON output")

class TestApplyPatchEnvelope:
    def test_check_has_envelope(self) -> None:
        r = runner.invoke(None, ["apply-patch", "nonexistent.patch", "--check", "--json"])
        try:
            d = json.loads(r.output)
            _has_envelope(d)
        except (json.JSONDecodeError, AssertionError):
            pytest.skip("apply-patch errored before JSON output")

class TestArchiveEnvelope:
    def test_list_has_envelope(self) -> None:
        r = runner.invoke(None, ["archive", "--list", "--json"])
        assert r.exit_code == 0, r.output
        d = json.loads(r.output)
        _has_envelope(d)