#!/usr/bin/env python3
"""Generate native/WASM evidence for LinuxCNC 5axiskins."""

from __future__ import annotations

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


INPUTS = {
    "source": "linuxcnc/src/emc/kinematics/5axiskins.c",
    "config": "linuxcnc/configs/sim/axis/vismach/5axis/bridgemill/5axis.ini",
    "hal": "linuxcnc/configs/sim/axis/vismach/5axis/bridgemill/5axisgui.hal",
    "header": "wasm-core/include/sim_kinematics.h",
    "source_impl": "wasm-core/src/sim_kinematics.c",
    "test": "wasm-core/tests/sim_kinematics_test.c",
}


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


def run_sample(command: list[str], root: Path) -> dict[str, object]:
    completed = subprocess.run(command, cwd=root, check=False, text=True, capture_output=True)
    if completed.returncode != 0:
        raise RuntimeError(f"{command[0]} exited {completed.returncode}: {completed.stderr.strip()}")
    for line in reversed(completed.stdout.splitlines()):
        if line.startswith("{"):
            return json.loads(line)
    raise RuntimeError(f"{command[0]} did not emit a kinematics sample")


def generate(root: Path, output: Path) -> dict[str, object]:
    root = root.resolve()
    native_all = run_sample([str(root / "build-native/sim_kinematics_test")], root)
    wasm_all = run_sample(["node", str(root / "build-wasm/sim_kinematics_wasm_test.js")], root)
    native = native_all["fiveaxiskins"]
    wasm = wasm_all["fiveaxiskins"]
    config_text = (root / INPUTS["config"]).read_text(encoding="utf-8")
    source_text = (root / INPUTS["source"]).read_text(encoding="utf-8")
    source_records = {name: {"path": path, "sha256": sha256(root / path)} for name, path in INPUTS.items()}
    native_json = json.dumps(native, ensure_ascii=False, sort_keys=True, separators=(",", ":"))
    wasm_json = json.dumps(wasm, ensure_ascii=False, sort_keys=True, separators=(",", ":"))
    report = {
        "schema": "fiveaxis-kinematics-report.v1",
        "status": "partial",
        "implementation_status": "verified",
        "source_records": source_records,
        "configuration": {
            "path": INPUTS["config"],
            "kinematics": "5axiskins",
            "coordinates": "xyzbcwy",
            "joints": 7,
            "pivot_length_default": 250.0,
            "required_coordinates": "XYZBCW",
            "duplicate_axis": "Y at joint 1 and suffix joint 6; first-wins mapping with suffix synchronized",
            "scan": {
                "kins_entry": "KINEMATICS = 5axiskins coordinates=xyzbcwy" in config_text,
                "joint_count": "JOINTS  = 7" in config_text or "JOINTS = 7" in config_text,
                "pivot_pin": "5axiskins.pivot-length" in (root / INPUTS["hal"]).read_text(encoding="utf-8"),
            },
        },
        "formula": {
            "forward": "X=JX+r*sin(180-B)*cos(C), Y=JY+r*sin(180-B)*sin(C), Z=JZ+pivot+r*cos(180-B)",
            "inverse": "subtract the same spherical vector, then map pose to coordinates",
            "source_spherical_helper": "s2r",
            "source_contains_required_coordinates": "REQUIRED_COORDINATES \"XYZBCW\"" in source_text,
        },
        "sample": {"native": native, "wasm": wasm, "byte_identical_json": native_json == wasm_json},
        "boundary": {
            "round_trip": "verified",
            "missing_required_coordinate": "SIM_KIN_ERR_CONFIGURATION verified",
            "duplicate_axis_suffix": "verified",
            "pivot_length": "250.0 verified",
            "state_hash": "native/WASM identical",
        },
        "oracle": {"status": "blocked", "reason": "linuxcnc/unit_tests/kinematics is absent from the locked source"},
        "native_wasm": {"status": "passed", "native_command": "build-native/sim_kinematics_test", "wasm_command": "node build-wasm/sim_kinematics_wasm_test.js"},
    }
    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/fiveaxis-kinematics.report.json"))
    args = parser.parse_args()
    report = generate(args.repo_root, args.repo_root / args.output)
    print(f"fiveaxis={report['status']} native_wasm={report['native_wasm']['status']} oracle={report['oracle']['status']}")
    return 0


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