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-planning-agent.toml"
IMPLEMENTATION_PLANS_README = ROOT / "docs" / "implementation-plans" / "README.md"


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

        self.assertEqual(data["name"], "implementation-planning-agent")
        self.assertIn("TDD-first C++/MSVC implementation plans", data["description"])
        self.assertEqual(data["sandbox_mode"], "read-only")
        self.assertEqual(data["model_reasoning_effort"], "extra high")
        self.assertIn("developer_instructions", data)

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

        for required_text in (
            "Do not implement code.",
            "Do not write tests.",
            "Do not edit CMake.",
            "Do not run CMake/CTest.",
            "Do not run Abaqus, Nastran, or any reference solver.",
            "Do not generate reference HDF5 files or deterministic CSV views.",
            "Do not compare solver results.",
            "Do not approve release readiness.",
        ):
            self.assertIn(required_text, instructions)

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

        for required_text in (
            "C++17",
            "MSVC",
            "CMake",
            "CTest",
            "TDD",
            "failing unit tests first",
            "reference comparison tests",
        ):
            self.assertIn(required_text, instructions)

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

        for required_text in (
            "Readiness Check",
            "Work Breakdown",
            "TDD Test Plan",
            "CMake/CTest Plan",
            "Acceptance Traceability Matrix",
            "Validation Commands",
            "Downstream Handoff",
        ):
            self.assertIn(required_text, instructions)

    def test_implementation_planning_document_guide_defines_output_contract(self):
        guide = IMPLEMENTATION_PLANS_README.read_text(encoding="utf-8")

        for required_text in (
            "docs/implementation-plans/<feature-id>-implementation-plan.md",
            "Readiness Check",
            "Work Breakdown",
            "TDD Test Plan",
            "CMake/CTest Plan",
            "Acceptance Traceability Matrix",
            "Validation Commands",
            "Downstream Handoff",
            "python scripts/validate_workspace.py",
            "ctest -C Debug",
        ):
            self.assertIn(required_text, guide)


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