from __future__ import annotations

import ast
from pathlib import Path
import unittest


SRC = Path(__file__).resolve().parents[2] / "src" / "cmbuyer_client"
SCOPED = tuple((SRC / name) for name in ("core", "remote", "localstate"))


class StaticBoundaryTests(unittest.TestCase):
    def test_scoped_modules_do_not_import_device_pdd_or_unapproved_capabilities(self) -> None:
        forbidden_modules = ("cmbuyer_client.device", "cmbuyer_client.pdd")
        forbidden_text = (
            "ResultSink",
            "/events",
            "/fail",
            "/submission-fence",
            "/result",
            "click_permitted",
        )
        for directory in SCOPED:
            for path in directory.glob("*.py"):
                text = path.read_text(encoding="utf-8")
                tree = ast.parse(text)
                imports = []
                for node in ast.walk(tree):
                    if isinstance(node, ast.Import):
                        imports.extend(alias.name for alias in node.names)
                    elif isinstance(node, ast.ImportFrom) and node.module:
                        imports.append(node.module)
                for module in forbidden_modules:
                    self.assertFalse(any(name.startswith(module) for name in imports), (path, module))
                for value in forbidden_text:
                    self.assertNotIn(value, text, (path, value))