#!/usr/bin/env python3
"""Swarm worker daemon (bridge integrator).

Polls box for pending swarm slots, executes them, and posts results back.
Runs inside the `swarm-worker` tmux session via swarm-worker-supervise.sh.

Loop:
    1. find_pending_slots()            (poller.py)
    2. execute_task(task_text)          (executor.py)
    3. post_result(swarm_id, slot, r)   (reporter.py)
    4. sleep POLL_INTERVAL, repeat

Safety:
    - DRY_RUN=True means: never execute, never post. Log "would execute"
      and skip. Flip to False only on explicit go-live authorization.
    - Per-slot try/except: one bad slot never kills the loop.
    - All activity logged to stdout (captured to the tmux log file).
"""

import logging
import os
import sys
import time
import traceback

# Sibling modules live in the same directory.
sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))

from poller import find_pending_slots
from executor import execute_task
from reporter import post_result

POLL_INTERVAL = 60          # seconds between poll cycles
STALE_MINUTES = 5           # slots older than this with no attach are workable

# === SAFETY SWITCH ===
# True  -> observe only: log what WOULD be done, execute/post nothing.
# False -> live mode. Flip only on explicit go-live authorization.
DRY_RUN = False

logging.basicConfig(
    level=logging.INFO,
    format="%(asctime)s [swarm-worker] %(levelname)s %(message)s",
    datefmt="%Y-%m-%dT%H:%M:%S",
)
log = logging.getLogger("swarm-worker")


def process_slot(slot):
    """Execute one slot and report the result. Returns True on full success."""
    swarm_id = slot.get("swarm_id")
    slot_index = slot.get("slot_index")
    task_text = slot.get("task_text") or ""
    tag = "%s/%s" % (swarm_id, slot_index)

    if DRY_RUN:
        log.info("[dry-run] would execute slot %s (agent=%s, task %.80r)",
                 tag, slot.get("agent_label"), task_text)
        return True

    log.info("executing slot %s (agent=%s)", tag, slot.get("agent_label"))
    try:
        result = execute_task(task_text)
    except Exception:
        log.error("executor crashed on slot %s:\n%s", tag, traceback.format_exc())
        result = {"success": False, "output": "",
                  "error": "executor crashed: see worker log"}

    payload = {
        "ok": bool(result.get("success")),
        "output": result.get("output") or "",
        "error": result.get("error"),
    }
    try:
        posted = post_result(swarm_id, slot_index, payload)
    except Exception:
        log.error("reporter crashed on slot %s:\n%s", tag, traceback.format_exc())
        posted = False

    log.info("slot %s done: ok=%s posted=%s (%.1fs)",
             tag, payload["ok"], posted,
             float(result.get("duration_s") or 0.0))
    return bool(payload["ok"]) and posted


def poll_cycle():
    """One poll cycle. Never raises."""
    try:
        slots = find_pending_slots(stale_minutes=STALE_MINUTES)
    except Exception:
        log.error("poller crashed:\n%s", traceback.format_exc())
        return
    if not slots:
        log.info("poll: no pending slots")
        return
    log.info("poll: %d pending slot(s)", len(slots))
    for slot in slots:
        try:
            process_slot(slot)
        except Exception:
            log.error("slot %s/%s unhandled error:\n%s",
                      slot.get("swarm_id"), slot.get("slot_index"),
                      traceback.format_exc())


def main():
    log.info("starting (DRY_RUN=%s, interval=%ds)", DRY_RUN, POLL_INTERVAL)
    while True:
        try:
            poll_cycle()
        except Exception:
            log.error("poll cycle crashed:\n%s", traceback.format_exc())
        time.sleep(POLL_INTERVAL)


if __name__ == "__main__":
    main()