#!/usr/bin/env python3
"""verify_summary.py — Assert csv_summary.py output matches expected values."""
import sys
import json


def _check(cond, msg):
    """A failure path `-O` cannot compile away (Q63: assert-only files exit 0 under -O)."""
    if not cond:
        raise RuntimeError(msg)


expected_rows = 5
expected_columns = ["name", "age", "salary", "active"]
expected_age = {
    "count": 5,
    "sum": 150.0,
    "mean": 30.0,
    "median": 30.0,
    "min": 25.0,
    "max": 35.0,
}
expected_salary = {
    "count": 5,
    "sum": 265000.0,
    "mean": 53000.0,
    "median": 50000.0,
    "min": 45000.0,
    "max": 70000.0,
}

data = json.load(sys.stdin)
_check(data["rows"] == expected_rows, f"rows: {data['rows']}")
_check(data["columns"] == expected_columns, f"columns: {data['columns']}")
age = data["numeric"]["age"]
for k, v in expected_age.items():
    _check(age[k] == v, f"age.{k}: {age[k]} != {v}")
sal = data["numeric"]["salary"]
for k, v in expected_salary.items():
    _check(sal[k] == v, f"salary.{k}: {sal[k]} != {v}")
print("VERIFIED")