"""独立离线核验；Python 3.12 标准库，无网络或设备访问。"""
from pathlib import Path
import json
import struct
import datetime as dt
import math
import re
import uuid

def parse(d):
    b=bytes.fromhex(d['hex'])
    if len(b)<4: raise ValueError('数组长度字段缺失')
    n=int.from_bytes(b[:4],'little',signed=True)
    if n< -1: raise ValueError('数组长度小于-1')
    if n==-1:
        if len(b)!=4: raise ValueError('null后不应有元素')
        return {'state':'null','length':-1,'values':None}
    if len(b)!=4+4*n: raise ValueError('数组内容长度错误')
    return {'state':'empty' if n==0 else 'present','length':n,'values':[int.from_bytes(b[i:i+4],'little',signed=True) for i in range(4,len(b),4)]}


def main():
    root = Path(__file__).resolve().parent
    fixture = json.loads((root / "fixture.json").read_text(encoding="utf-8"))
    rows = []
    for item in fixture["cases"]:
        try:
            result = parse(item["input"])
        except ValueError as exc:
            assert "expected_error" in item, (item["case_id"], str(exc))
            assert str(exc) == item["expected_error"], (item["case_id"], str(exc))
            rows.append({"case_id": item["case_id"], "kind": item["kind"], "rejected": str(exc)})
        else:
            assert "expected_error" not in item, item["case_id"]
            assert result == item["expected"], (item["case_id"], result, item["expected"])
            rows.append({"case_id": item["case_id"], "kind": item["kind"], "result": result})
    report = {"fixture": fixture["topic"], "cases": rows, "assertions_passed": len(rows), "scope": "合成输入离线演算；未接真实设备"}
    (root / "report.json").write_text(json.dumps(report, ensure_ascii=False, indent=2) + "\n", encoding="utf-8")
    print(json.dumps({"assertions_passed": len(rows), "all_passed": True}, ensure_ascii=True))

if __name__ == "__main__":
    main()