#!/usr/bin/env python3
"""Tests for the final S5 source parity report."""

from __future__ import annotations

import hashlib
import json
import sys
import tempfile
import unittest
from pathlib import Path

sys.path.insert(0, str(Path(__file__).resolve().parent))
import generate_linuxcnc_source_parity_s5


ROOT = Path(__file__).resolve().parents[1]
REPORT = ROOT / "coverage/linuxcnc-source-parity-s5.report.json"


class LinuxCncSourceParityS5Tests(unittest.TestCase):
    def test_report_contract(self):
        report = json.loads(REPORT.read_text(encoding="utf-8"))
        self.assertEqual(report["schema"], "linuxcnc-source-parity-s5.v1")
        self.assertEqual(report["task_id"], "S5-08")
        self.assertEqual(report["status"], "verified")
        self.assertEqual(len(report["source_reports"]), 7)
        self.assertEqual(report["coverage"]["source_matrix_entries"], 264)
        self.assertEqual(report["coverage"]["source_matrix_entrypoints"], 233)
        self.assertTrue(report["repeat_execution"]["stable"])
        self.assertTrue(report["recovery_endpoints"]["recovery_equal"])
        self.assertTrue(report["recovery_endpoints"]["trace_import_equal"])
        self.assertIsNone(report["difference_summary"]["first_divergence"])
        self.assertEqual(report["official_oracle"]["status"], "SOURCE_BLOCKED")

    def test_self_hash(self):
        report = json.loads(REPORT.read_text(encoding="utf-8"))
        unsigned = {key: value for key, value in report.items() if key != "report_sha256"}
        self.assertEqual(report["report_sha256"], hashlib.sha256(generate_linuxcnc_source_parity_s5.canonical(unsigned).encode()).hexdigest())

    def test_deterministic(self):
        with tempfile.TemporaryDirectory() as directory:
            first = generate_linuxcnc_source_parity_s5.generate(ROOT, Path(directory) / "one.json")
            second = generate_linuxcnc_source_parity_s5.generate(ROOT, Path(directory) / "two.json")
            self.assertEqual(first, second)


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