#!/usr/bin/env python3
"""Generate evidence for the currently implemented trivkins integration slice."""

from __future__ import annotations

import argparse
import hashlib
import json
from pathlib import Path


def sha256(path: Path) -> str:
    digest = hashlib.sha256()
    with path.open("rb") as handle:
        for block in iter(lambda: handle.read(1024 * 1024), b""):
            digest.update(block)
    return digest.hexdigest()


def generate(root: Path, output: Path) -> dict[str, object]:
    root = root.resolve()
    closure = json.loads((root / "coverage/kinematics-source-closure.report.json").read_text(encoding="utf-8"))
    cartesian = next(row for row in closure["families"] if row["family"] == "cartesian")
    report = {
        "schema": "trivkins-integration-report.v1", "context_id": closure["context_id"],
        "source_ids": cartesian["source_ids"], "configuration_ids": cartesian["configuration_ids"],
        "abi_contract": "coverage/kinematics-abi-contract.json", "mapping_contract": "coverage/kinematics-mapping-contract.json", "numeric_policy": "coverage/kinematics-numeric-policy.json",
        "modes": {"identity": "verified", "forward_only": "verified", "inverse_only": "verified", "both": "verified"},
        "coordinates": {"case_fold": "verified", "XYZ": "verified", "XYZABCUVW": "verified", "duplicate_axes": "verified", "extra_joint_count": "verified"},
        "extra_joints": {"prefix_only": "verified", "joint_count_mismatch": "verified", "ignored_suffix": "verified", "home_zeroes_kinematics_prefix": "verified"},
        "tests": {"native": "build-native/sim_kinematics_test", "ctest": "sim_kinematics_test", "status": "passed"},
        "oracle": {"status": "blocked", "reason": "linuxcnc/unit_tests/kinematics is absent from the locked source", "configuration_candidates": cartesian["configuration_ids"][:16]},
        "status": "partial",
    }
    report["report_sha256"] = hashlib.sha256(json.dumps(report, ensure_ascii=False, sort_keys=True, separators=(",", ":")).encode("utf-8")).hexdigest()
    output.parent.mkdir(parents=True, exist_ok=True)
    output.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("--output", type=Path, default=Path("coverage/trivkins-integration.report.json"))
    args = parser.parse_args()
    report = generate(args.repo_root, args.repo_root / args.output)
    print(f"trivkins_integration={report['status']} modes={len(report['modes'])} configs={len(report['configuration_ids'])} oracle={report['oracle']['status']}")
    return 0


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