import unittest
from pathlib import Path

try:
    import tomllib
except ModuleNotFoundError:  # pragma: no cover
    import tomli as tomllib


ROOT = Path(__file__).resolve().parents[1]
AGENT_PATH = ROOT / ".codex" / "agents" / "requirement-agent.toml"
REQUIREMENTS_README = ROOT / "docs" / "requirements" / "README.md"


class RequirementAgentConfigTests(unittest.TestCase):
    def test_requirement_agent_toml_has_required_codex_fields(self):
        data = tomllib.loads(AGENT_PATH.read_text(encoding="utf-8"))

        self.assertEqual(data["name"], "requirement-agent")
        self.assertIn("verifiable requirements", data["description"])
        self.assertEqual(data["sandbox_mode"], "read-only")
        self.assertEqual(data["model_reasoning_effort"], "extra high")
        self.assertIn("developer_instructions", data)

    def test_requirement_agent_instructions_enforce_boundaries(self):
        instructions = AGENT_PATH.read_text(encoding="utf-8")

        for required_text in (
            "Do not implement code.",
            "Do not write finite element formulations.",
            "Do not run Abaqus, Nastran, or any reference solver.",
            "Do not create reference CSV outputs.",
            "Requirement Verification Matrix",
            "docs/SOLVER_AGENT_DESIGN.md",
            "references/<feature>",
        ):
            self.assertIn(required_text, instructions)

    def test_requirement_document_guide_defines_output_contract(self):
        guide = REQUIREMENTS_README.read_text(encoding="utf-8")

        for required_text in (
            "feature_id",
            "Verification Quantities",
            "Tolerance Policy",
            "Reference Artifact Requirements",
            "Requirement Verification Matrix",
            "Downstream Handoff",
            "FESA-REQ-<FEATURE>-001",
        ):
            self.assertIn(required_text, guide)


if __name__ == "__main__":
    unittest.main()