#!/usr/bin/env python3
"""chat-state-report.py — per-node chat-state tap for box.

Probes each NetVM node's browser via CDP (inside its netns): main chat +
side chats, last messages. Signs and POSTs to the board chat-state ingest,
mirroring accounts-health.sh: payload is
<machine>\\n<ts>\\n<facts-json>, namespace "health".

Usage: chat-state-report.py [--no-post]

Cron (on bl, every 5 min):
  */5 * * * * ~/Projects/NetVM/bin/chat-state-report.py >/dev/null 2>&1

Health key setup: same key as accounts-health (namespace "health",
registered in /srv/board/health_signers for machine bl).
"""
import importlib.util
import json
import os
import subprocess
import sys
import tempfile
import time

NETVM_DIR = os.environ.get("NETVM_DIR",
                           os.path.expanduser("~/Projects/NetVM"))
CHECK = os.path.join(NETVM_DIR, "bin", "chat-state-check.py")
MACHINE = os.environ.get("MUSE_MACHINE", "bl")
KEY = os.environ.get("CHATSTATE_KEY",
                     os.path.expanduser("~/.ssh/muse-health"))
ENDPOINT = os.environ.get(
    "CHATSTATE_ENDPOINT",
    "https://board.muse-dev.online/api/box/chat-state/report")
MAX_SIDECHATS = 5
FACTS_CAP = 64 * 1024
POST = "--no-post" not in sys.argv


def load_nodes():
    spec = importlib.util.spec_from_file_location(
        "netvm_registry",
        os.path.join(NETVM_DIR, "bin", "netvm-registry.py"))
    mod = importlib.util.module_from_spec(spec)
    spec.loader.exec_module(mod)
    return mod.load()  # node -> {"cdp_port": ...}


def run_check(node, port, *args):
    cmd = ["sudo", "-n", "ip", "netns", "exec", "warp-%s" % node,
           "python3", CHECK, str(port)] + list(args)
    try:
        r = subprocess.run(cmd, capture_output=True, text=True, timeout=150)
        line = r.stdout.strip().splitlines()[-1]
        return json.loads(line)
    except Exception as e:  # noqa: BLE001
        return {"ok": False, "error": "check_failed",
                "detail": str(e)[:120]}


def main():
    nodes = load_nodes()
    chats = []
    now = int(time.time())
    for node, rec in sorted(nodes.items()):
        port = rec.get("cdp_port")
        if not port:
            continue
        base = {"node": node, "checked_at": now}
        m = run_check(node, port, "main")
        entry = dict(base)
        if m.get("ok"):
            entry.update(m)
        else:
            entry.update({"context": "main", "error": m.get("error"),
                          "detail": m.get("detail", "")[:120]})
            chats.append(entry)
            continue
        chats.append(entry)
        lst = run_check(node, port, "list")
        for name in (lst.get("sidechats") or [])[:MAX_SIDECHATS]:
            s = run_check(node, port, "sidechat", name)
            sentry = dict(base)
            if s.get("ok"):
                sentry.update(s)
            else:
                sentry.update({"context": "sidechat", "name": name,
                               "error": s.get("error"),
                               "detail": s.get("detail", "")[:120]})
            chats.append(sentry)
    facts = {"chats": chats, "checked_at": now}
    facts_json = json.dumps(facts, separators=(",", ":"))
    if len(facts_json) > FACTS_CAP:
        # Shed message bodies, keep metadata.
        for c in chats:
            c.pop("messages", None)
        facts["truncated"] = True
        facts_json = json.dumps(facts, separators=(",", ":"))
    if not POST:
        print(json.dumps(json.loads(facts_json), indent=2))
        return
    if not os.path.exists(KEY):
        print("chat-state-report: %s missing — printing JSON, not posting"
              % KEY, file=sys.stderr)
        print(facts_json)
        return
    tmp = tempfile.mkdtemp()
    try:
        payload = os.path.join(tmp, "payload")
        with open(payload, "w") as f:
            f.write("%s\n%d\n%s" % (MACHINE, now, facts_json))
        # Fresh temp dir: no stale .sig to worry about (cf. AGENTS.md).
        subprocess.run(["ssh-keygen", "-Y", "sign", "-f", KEY,
                        "-n", "health", payload],
                       check=True, capture_output=True)
        with open(payload + ".sig") as f:
            sig = f.read()
        body = {"machine": MACHINE, "ts": now, "facts_json": facts_json,
                "signature": sig}
        r = subprocess.run(
            ["curl", "-s", "-X", "POST", ENDPOINT,
             "-H", "Content-Type: application/json",
             "--data", json.dumps(body)],
            capture_output=True, text=True, timeout=90)
        print(r.stdout[:300])
    finally:
        subprocess.run(["rm", "-rf", tmp])


main()