import hashlib
import json
import unittest
from pathlib import Path

from generate_source_semantics_contract import OUTPUT, canonical, generate


ROOT = Path(__file__).resolve().parents[1]


class SourceSemanticsContractTests(unittest.TestCase):
    def test_contract(self):
        report = json.loads(OUTPUT.read_text(encoding="utf-8"))
        self.assertEqual(report["schema"], "linuxcnc-source-semantics-contract.v1")
        self.assertEqual(report["status"], "verified")
        self.assertEqual(report["context_id"], "linuxcnc-2.10.0-pre0-wasm-m1-py-c1")
        self.assertTrue(any(rule["id"] == "axis_open_file_optional" for rule in report["rules"]))
        self.assertTrue(any(rule["id"] == "halfile_missing_classification" for rule in report["rules"]))
        self.assertEqual(report["control_panel_contract"]["projection_only"], True)
        self.assertTrue(all(item["status"] == "present" for item in report["inputs"]))

    def test_self_hash_and_determinism(self):
        before = OUTPUT.read_bytes()
        report = generate()
        self.assertEqual(before, OUTPUT.read_bytes())
        unsigned = {key: value for key, value in report.items() if key != "report_sha256"}
        self.assertEqual(report["report_sha256"], hashlib.sha256(canonical(unsigned).encode()).hexdigest())


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