"""Compare two series dumps run by run: report the largest absolute difference and exact equality.

Usage: python -I compare_series.py A.json B.json
Exits 1 unless every run in A is in B with bitwise-identical values.
"""
import json
import math
import sys

a = json.load(open(sys.argv[1]))
b = json.load(open(sys.argv[2]))
worst = 0.0
identical = True
for run, series in a.items():
    if run not in b:
        print(f"missing in B: {run}")
        identical = False
        continue
    for name, values in series.items():
        other = b[run][name]
        for x, y in zip(values, other, strict=True):
            if x != y and not (math.isnan(x) and math.isnan(y)):
                identical = False
                if math.isfinite(x) and math.isfinite(y):
                    worst = max(worst, abs(x - y))
print(f"runs compared: {len(a)}; bitwise identical: {identical}; largest abs difference: {worst:.3g}")
sys.exit(0 if identical else 1)