#!/usr/bin/env python3
"""Backfill events.shape_* from each event's .h5 waveform samples. Idempotent."""
from __future__ import annotations
import argparse, logging, sys
from pathlib import Path
sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
from sfm.database import SeismoDb
from sfm.waveform_store import WaveformStore
from sfm.shape_metrics import shape_from_h5

log = logging.getLogger("backfill_event_shape")

def backfill_shape(db: SeismoDb, store: WaveformStore, *, dry_run: bool = False) -> dict:
    counts = {"updated": 0, "skipped_no_h5": 0, "skipped_no_samples": 0}
    for row in db.query_events(limit=1_000_000):
        serial, filename = row.get("serial"), row.get("blastware_filename")
        if not serial or not filename:
            counts["skipped_no_h5"] += 1; continue
        h5_path = store.hdf5_path_for(serial, filename)
        if not h5_path.exists():
            counts["skipped_no_h5"] += 1; continue
        shape = shape_from_h5(h5_path)
        if shape is None:
            counts["skipped_no_samples"] += 1; continue
        if not dry_run:
            with db._connect() as conn:
                conn.execute(
                    "UPDATE events SET shape_crest_factor=?, shape_near_peak_count=?, "
                    "shape_sample_count=?, shape_axis=? WHERE id=?",
                    (shape["crest_factor"], shape["near_peak_count"],
                     shape["sample_count"], shape["axis"], row["id"]))
        counts["updated"] += 1
    log.info("backfill_shape: %s", counts)
    return counts

def main(argv=None) -> int:
    ap = argparse.ArgumentParser()
    ap.add_argument("--db-path", required=True)
    ap.add_argument("--store-root", required=True)
    ap.add_argument("--dry-run", action="store_true")
    a = ap.parse_args(argv)
    logging.basicConfig(level=logging.INFO)
    counts = backfill_shape(SeismoDb(a.db_path), WaveformStore(a.store_root), dry_run=a.dry_run)
    print(counts)
    return 0

if __name__ == "__main__":
    raise SystemExit(main())