#!/usr/bin/env python3
"""Tests for S6-02 authoritative fixed-tick integration evidence."""

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_authoritative_sim_task_s6


ROOT = Path(__file__).resolve().parents[1]
REPORT = ROOT / "coverage/authoritative-sim-task-s6.report.json"


class AuthoritativeSimTaskS6Tests(unittest.TestCase):
    def test_contract(self):
        report = json.loads(REPORT.read_text(encoding="utf-8"))
        self.assertEqual(report["schema"], "authoritative-sim-task-s6.v1")
        self.assertEqual(report["task_id"], "S6-02")
        self.assertEqual(report["status"], "verified")
        self.assertEqual(report["scope"]["kinematics"], "trivkins")
        self.assertEqual(len(report["scope"]["phases"]), 8)
        self.assertTrue(report["worker"]["sample"]["parity"]["mode"]["equal"])
        self.assertTrue(report["worker"]["sample"]["parity"]["one_x_recovery"]["equal"])
        self.assertTrue(all(item["byte_identical"] for item in report["native_wasm_component_golden"].values()))

    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_authoritative_sim_task_s6.canonical(unsigned).encode()).hexdigest())

    def test_deterministic(self):
        with tempfile.TemporaryDirectory() as directory:
            first = generate_authoritative_sim_task_s6.generate(ROOT, Path(directory) / "one.json")
            second = generate_authoritative_sim_task_s6.generate(ROOT, Path(directory) / "two.json")
            self.assertEqual(first, second)


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