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" / "implementation-agent.toml"


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

        self.assertEqual(data["name"], "implementation-agent")
        self.assertIn("C++17/MSVC", data["description"])
        self.assertEqual(data["sandbox_mode"], "workspace-write")
        self.assertEqual(data["model_reasoning_effort"], "extra high")
        self.assertIn("developer_instructions", data)

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

        for required_text in (
            "Write tests first",
            "verify failure",
            "minimum code",
            "C++17",
            "MSVC",
            "CMake",
            "CTest",
            "RED -> GREEN -> VERIFY",
        ):
            self.assertIn(required_text, instructions)

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

        for required_text in (
            "Do not run Abaqus, Nastran, or any reference solver.",
            "Do not generate reference CSVs.",
            "Do not approve release readiness.",
            "Do not change requirements",
            "Do not change formulations",
            "Do not change I/O contracts",
            "Do not change reference artifacts",
            "Do not produce the final reference verification report.",
        ):
            self.assertIn(required_text, instructions)

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

        for required_text in (
            "Test Evidence",
            "Code Changes",
            "Validation Evidence",
            "Traceability",
            "Downstream Handoff",
            "Build/Test Executor Agent",
            "Correction Agent",
            "Reference Verification Agent",
        ):
            self.assertIn(required_text, instructions)

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

        for required_text in (
            "python -m unittest discover -s scripts -p \"test_*.py\"",
            "python scripts/validate_workspace.py",
            "ctest -C Debug",
        ):
            self.assertIn(required_text, instructions)


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