#!/usr/bin/env python3
"""Return '<total_tokens> <cost_usd>' for the provider-telemetry record that
matches the given step, or print nothing if there is no genuine match.

Never falls back to an arbitrary record — reusing one sample's cost across
every step would misrepresent an estimate as real per-step billing.

Usage: provider-cost-lookup.py <provider-usage.jsonl> <step-name>
"""
import json
import sys

if len(sys.argv) < 3:
    sys.exit(0)
path, step = sys.argv[1], sys.argv[2]
match = None
try:
    with open(path, encoding="utf-8") as fh:
        for line in fh:
            line = line.strip()
            if not line:
                continue
            rec = json.loads(line)
            if rec.get("step") == step:
                match = rec  # last matching record wins
except OSError:
    sys.exit(0)
if match is not None:
    print(f"{match.get('total_tokens', 0)} {match.get('cost_usd', 0)}")