#!/usr/bin/env python3
# SPDX-License-Identifier: Apache-2.0
# Copyright 2026 Protocol Company
"""Send a row's two requests to the address again and compare what comes back with what the row holds.

    python3 scripts/replay.py edge-0123456789ab            # one row, by id
    python3 scripts/replay.py --model energy/reactor_spert3  # every row of one model
    python3 scripts/replay.py --sample 5                    # the first 5 rows of each file

The address is open to any agent: https://mcp.zerotrustphysics.com/mcp. It is asked one
request at a time, with a pause between requests, and asked again after a wait when it
answers HTTP 429 or "Too many concurrent physics tasks.". Another address is given with
--address. Standard library only.

For each of a row's two requests the script reports one of:

  same bytes     the answer is the text the row holds, byte for byte;
  same proof     the text differs and the proof (run_seal or solution_seal) is the same:
                 the physics is the same and something outside the seal differs, such as
                 the engine_version string of a later release;
  same stop      a request stopped before any computing gives the same stop name, in
                 other words;
  differs        the engine now answers this request differently: the model, or its
                 limit, has changed since the row was made. That is news, not a fault
                 in the row, and each model's own description at the address is the
                 current word.

Exit code 0: nothing differs. 1: something differs.
"""
import json
import os
import re
import sys
import time
import urllib.error
import urllib.request

ADDRESS = "https://mcp.zerotrustphysics.com/mcp"
BUSY = "Too many concurrent physics tasks."
NAME = re.compile(r"\(([A-Z][A-Za-z0-9]+)\)")


def ask(address, tool, arguments, tries=40):
    """One tools/call. Returns (text, is_error)."""
    body = json.dumps({"jsonrpc": "2.0", "id": 1, "method": "tools/call",
                       "params": {"name": tool, "arguments": arguments}}).encode("utf-8")
    wait = 2.0
    for _ in range(tries):
        req = urllib.request.Request(address, data=body, method="POST", headers={
            "content-type": "application/json", "accept": "application/json, text/event-stream",
            "mcp-protocol-version": "2025-06-18", "user-agent": "zero-trust-physics-edges-replay/1"})
        try:
            with urllib.request.urlopen(req, timeout=120) as res:
                raw = res.read().decode("utf-8")
        except urllib.error.HTTPError as e:
            if e.code in (429, 502, 503, 504):
                after = e.headers.get("Retry-After", "")
                time.sleep(max(float(after) if after.isdigit() else wait, 1.0))
                wait = min(wait * 1.5, 30.0)
                continue
            raise
        line = next((l for l in raw.split("\n") if l.startswith("data:")), None)
        msg = json.loads(line[5:] if line else raw)
        if "error" in msg:
            return json.dumps(msg["error"]), True
        text = "".join(c.get("text", "") for c in msg["result"]["content"])
        if msg["result"].get("isError") and text.strip() == BUSY:
            time.sleep(wait)
            wait = min(wait * 1.5, 30.0)
            continue
        return text, bool(msg["result"].get("isError"))
    raise RuntimeError("the address stayed busy")


def proof_of(text):
    try:
        a = json.loads(text)
    except ValueError:
        return None
    if not isinstance(a, dict):
        return None
    return a.get("run_seal") or a.get("solution_seal")


def compare(held, now):
    if held == now:
        return "same bytes"
    ph, pn = proof_of(held), proof_of(now)
    if ph is not None and ph == pn:
        return "same proof"
    if ph is None and pn is None:
        nh, nn = NAME.findall(held), NAME.findall(now)
        if nh and nn and nh[-1] == nn[-1]:
            return "same stop"
    return "differs"


def rows(files):
    for path in files:
        with open(path, encoding="utf-8") as f:
            for line in f:
                if line.strip():
                    yield path, json.loads(line)


def main(argv):
    here = os.path.dirname(os.path.abspath(__file__))
    files = [os.path.join(here, "..", "data", "cards.jsonl"), os.path.join(here, "..", "data", "solvers.jsonl")]
    address, ids, model, sample = ADDRESS, [], None, None
    it = iter(argv)
    for arg in it:
        if arg == "--address":
            address = next(it)
        elif arg == "--model":
            model = next(it)
        elif arg == "--sample":
            sample = int(next(it))
        elif arg in ("-h", "--help"):
            print(__doc__)
            return 0
        else:
            ids.append(arg)
    if not ids and model is None and sample is None:
        print(__doc__)
        return 2
    seen, differs, count = {}, 0, 0
    for path, row in rows(files):
        seen[path] = seen.get(path, 0) + 1
        if ids and row["id"] not in ids:
            continue
        if model and row["model"] != model:
            continue
        if sample is not None and not ids and not model and seen[path] > sample:
            continue
        count += 1
        result = []
        for side in ("inside", "outside"):
            text, _ = ask(address, row["tool"], json.loads(row[side + "_request"]))
            verdict = compare(row[side + "_answer"], text)
            differs += verdict == "differs"
            result.append("%s: %s" % (side, verdict))
            time.sleep(0.5)
        print("%s  %s  %s  %s" % (row["id"], row["model"], row["input"], "; ".join(result)))
    print("result: %d rows asked again, %d answers differ" % (count, differs))
    return 1 if differs or not count else 0


if __name__ == "__main__":
    sys.exit(main(sys.argv[1:]))