from __future__ import annotations

import importlib.util
import shutil
import subprocess
import sys
from pathlib import Path

import pytest

ROOT = Path(__file__).resolve().parents[2]


def load(name, path):
    spec = importlib.util.spec_from_file_location(name, path)
    module = importlib.util.module_from_spec(spec)
    spec.loader.exec_module(module)
    return module


@pytest.fixture
def artifact(tmp_path, monkeypatch):
    renderer = load('runner_artifact_renderer', ROOT / 'scripts/prepare_controller_artifact.py')
    controller_dir = ROOT / 'ops/gitea-deploy-broker'
    monkeypatch.syspath_prepend(str(controller_dir))
    controller = load('runner_artifact_controller', controller_dir / 'status_server.py')
    stage = tmp_path / 'controller'
    stage.mkdir()
    for name in renderer._ARTIFACT_FILES:
        source = ROOT / 'scripts/run_repopulse_adoption.py' if name == 'run_repopulse_adoption.py' else controller_dir / name
        shutil.copyfile(source, stage / name)
    result = subprocess.run([
        sys.executable, str(ROOT / 'scripts/prepare_controller_artifact.py'),
        '--artifact-dir', str(stage), '--source-repository', 'jens/unraid-appops-gateway',
        '--source-revision', 'a' * 40, '--source-tree', 'b' * 40,
        '--controller-version', '2.1.13', '--built-at', '2026-10-01T12:00:00Z',
    ], capture_output=True, text=True, check=True)
    assert 'artifactSha256' in result.stdout
    monkeypatch.setattr(controller, 'ROOT', stage)
    monkeypatch.setattr(controller, 'CONTROLLER_RELEASE_PATH', stage / 'controller-release.json')
    return controller, stage


def test_renderer_and_runtime_accept_the_same_complete_specialized_artifact(artifact):
    controller, _stage = artifact
    release = controller._controller_release()
    assert release['controllerVersion'] == '2.1.13'
    assert release['sourceRevision'] == 'a' * 40


@pytest.mark.parametrize('damage', ['missing_binding', 'missing_hub_store', 'changed_admission', 'symlink_envelope'])
def test_incomplete_or_changed_specialized_artifact_cannot_be_promoted(artifact, damage):
    controller, stage = artifact
    if damage == 'missing_binding':
        (stage / 'runner_statistics_binding.py').unlink()
    elif damage == 'missing_hub_store':
        (stage / 'mcp_hub_release_store.py').unlink()
    elif damage == 'changed_admission':
        with (stage / 'runner_admission_policy.py').open('ab') as stream:
            stream.write(b'\n# changed after manifest rendering\n')
    else:
        target = stage / 'runner_resource_envelope.py'
        original = stage / 'moved_envelope.py'
        target.rename(original)
        try:
            target.symlink_to(original)
        except OSError:
            pytest.skip('Host cannot create symlink fixture')
    assert controller._controller_release() is None