#!/usr/bin/env python3
"""verify.py - recompute every answer from explicit params. Exit 1 on any failure."""
import json, sys
rows = json.load(open("data/problems.json"))
bad = 0
for r in rows:
    p = r["params"]
    if r["topic"] == "kinematics":
        if abs(p["v0"]*p["t"] + 0.5*p["a"]*p["t"]**2 - r["answer"]) > 0.05: bad += 1
    elif r["topic"] == "energy":
        if abs(p["m"]*p["g"]*p["h"] - r["answer"]) > 0.5: bad += 1
    elif r["topic"] == "circuits":
        if abs(p["v"]/(p["r1"]*p["r2"]/(p["r1"]+p["r2"])) - r["answer"]) > 0.01: bad += 1
print("verified %d/%d" % (len(rows)-bad, len(rows)))
sys.exit(1 if bad else 0)