import asyncio
import copy
import logging
import os
import time

from jobs.storage import get_job_storage
from models.isr.assessor import ISRAssessor

logger = logging.getLogger(__name__)


async def run_isr_assessor_loop(
    job_id: str,
    mission: str,
    interval_sec: float = 5.0,
) -> None:
    """
    Run ISR assessment loop alongside inference pipeline.

    Every interval_sec seconds:
    1. Read latest tracks from JobStorage
    2. Get latest frame for cropping
    3. Call ISRAssessor.assess_batch_sync (in thread pool)
    4. Merge verdicts back into all stored frames by track_id
    """
    api_key = os.environ.get("OPENAI_API_KEY")
    if not api_key:
        logger.warning("OPENAI_API_KEY not set, ISR assessment disabled for job %s", job_id)
        return

    assessor = ISRAssessor(mission=mission, api_key=api_key)
    storage = get_job_storage()
    assessed_track_ids: dict[str, dict] = {}  # cache of latest verdicts by track_id

    logger.info("ISR assessor started for job %s (interval=%.1fs)", job_id, interval_sec)

    try:
        while True:
            await asyncio.sleep(interval_sec)

            # Check if job still exists and is processing
            job = storage.get(job_id)
            if not job:
                logger.info("ISR assessor: job %s gone, stopping", job_id)
                break

            # Get latest frame
            frame = storage.get_latest_frame(job_id)
            if frame is None:
                continue

            # Find latest frame index with track data
            with storage._lock:
                frame_indices = list(storage._tracks.get(job_id, {}).keys())

            if not frame_indices:
                continue

            latest_idx = max(frame_indices)
            tracks = storage.get_track_data(job_id, latest_idx)

            if not tracks:
                continue

            # Deep copy tracks to avoid mutation during assessment
            tracks_copy = copy.deepcopy(tracks)

            # Run GPT assessment in thread pool (blocking IO)
            t0 = time.perf_counter()
            try:
                verdicts = await asyncio.to_thread(
                    assessor.assess_batch_sync, tracks_copy, frame.copy()
                )
            except Exception:
                logger.exception("ISR assessment call failed for job %s", job_id)
                continue

            elapsed = time.perf_counter() - t0
            logger.info(
                "ISR assessment for job %s: %d tracks assessed in %.1fs",
                job_id, len(verdicts), elapsed
            )

            if not verdicts:
                continue

            # Update cache
            assessed_track_ids.update(verdicts)

            # Merge verdicts into ALL stored frames
            _merge_verdicts(storage, job_id, assessed_track_ids, latest_idx)

    except asyncio.CancelledError:
        logger.info("ISR assessor cancelled for job %s, running final assessment", job_id)
        # Run one final assessment on cancellation
        frame = storage.get_latest_frame(job_id)
        if frame is not None:
            with storage._lock:
                frame_indices = list(storage._tracks.get(job_id, {}).keys())
            if frame_indices:
                latest_idx = max(frame_indices)
                tracks = storage.get_track_data(job_id, latest_idx)
                if tracks:
                    try:
                        verdicts = assessor.assess_batch_sync(copy.deepcopy(tracks), frame.copy())
                        if verdicts:
                            assessed_track_ids.update(verdicts)
                            _merge_verdicts(storage, job_id, assessed_track_ids, latest_idx)
                            logger.info("ISR final assessment: %d tracks", len(verdicts))
                    except Exception:
                        logger.exception("ISR final assessment failed for job %s", job_id)
    except Exception:
        logger.exception("ISR assessor loop crashed for job %s", job_id)


def _merge_verdicts(storage, job_id: str, verdicts: dict, assessment_frame_idx: int) -> None:
    """Merge verdict data into all stored frames for matching track_ids."""
    with storage._lock:
        frames = storage._tracks.get(job_id, {})
        for frame_idx, frame_tracks in frames.items():
            for det in frame_tracks:
                tid = det.get("track_id")
                if tid and tid in verdicts:
                    v = verdicts[tid]
                    det["mission_relevant"] = v.get("mission_relevant", True)
                    det["satisfies"] = v.get("satisfies")
                    det["reason"] = v.get("reason", "")
                    det["features"] = v.get("features", {})
                    det["assessment_status"] = "ASSESSED"
                    det["assessment_frame_index"] = assessment_frame_idx
                    # Store gpt_raw for frontend feature table
                    det["gpt_raw"] = {
                        "satisfies": v.get("satisfies"),
                        "reason": v.get("reason", ""),
                        **v.get("features", {}),
                    }