#!/usr/bin/env python3
"""Generate deterministic P8-01 native oracle/golden closure evidence."""

from __future__ import annotations

import argparse
import hashlib
import json
import subprocess
from pathlib import Path
from typing import Any


OUTPUTS = (Path("scripts/native_runner.py"), Path("coverage/golden-schema.json"), Path("coverage/test-entries.jsonl"))


def canonical(value: Any) -> str:
    return json.dumps(value, ensure_ascii=False, sort_keys=True, separators=(",", ":"))


def sha256(path: Path) -> str:
    return hashlib.sha256(path.read_bytes()).hexdigest()


def run(root: Path, command: list[str]) -> dict[str, Any]:
    result = subprocess.run(command, cwd=root, stdout=subprocess.PIPE, stderr=subprocess.PIPE, check=False)
    return {"status": "verified" if result.returncode == 0 else "blocked", "command": " ".join(command), "returncode": result.returncode, "stdout": result.stdout.decode("utf-8", errors="replace")[-1800:], "stderr": result.stderr.decode("utf-8", errors="replace")[-1200:]}


def generate(root: Path, report_path: Path) -> dict[str, Any]:
    self_test = run(root, ["python3", "scripts/native_runner.py", "--self-test"])
    native = run(root, ["./build-native/sim_interpreter_test"])
    wasm = run(root, ["node", "web/worker/test_sim_runner.mjs"])
    report: dict[str, Any] = {
        "schema": "native-oracle-closure-report.v1",
        "task_id": "P8-01",
        "context_id": "linuxcnc-2.10.0-pre0-wasm-m1-py-c1",
        "status": "verified" if all(item["status"] == "verified" for item in (self_test, native, wasm)) else "blocked",
        "golden_schema": {"schema": "native-golden.v1", "exact_fields": True, "first_difference": ["tick", "field", "expected", "actual"]},
        "runner": {"portable_env": True, "timeout": True, "stdout_stderr_hash": True, "artifact_capture": True, "wall_clock_excluded_from_digest": True},
        "tests": {"self_test": self_test, "native_interpreter": native, "wasm_worker": wasm},
        "outputs": [{"path": path.as_posix(), "bytes": (root / path).stat().st_size, "sha256": sha256(root / path)} for path in OUTPUTS],
        "oracle_boundary": {"status": "blocked", "reason": "official full LinuxCNC oracle inputs remain source-gated; derived tests are not accepted as official goldens"},
        "known_boundaries": ["P8-02 executes full startup matrix", "P8-03 repeats execution modes"],
    }
    report["report_sha256"] = hashlib.sha256(canonical(report).encode("utf-8")).hexdigest()
    report_path.parent.mkdir(parents=True, exist_ok=True)
    report_path.write_text(json.dumps(report, ensure_ascii=False, sort_keys=True, indent=2) + "\n", encoding="utf-8")
    return report


def main() -> int:
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument("--repo-root", type=Path, default=Path(__file__).resolve().parents[1])
    parser.add_argument("--report", type=Path, default=Path("coverage/native-oracle-closure.report.json"))
    args = parser.parse_args()
    report = generate(args.repo_root.resolve(), args.repo_root.resolve() / args.report)
    print(f"native_oracle={report['status']} self_test={report['tests']['self_test']['status']}")
    return 0 if report["status"] == "verified" else 1


if __name__ == "__main__":
    raise SystemExit(main())