"""Append-only ingest harness for the SEC fundamentals PIT bundle."""
from __future__ import annotations
import argparse
from datetime import datetime, timezone
from pathlib import Path

import polars as pl
from deltalake import DeltaTable, write_deltalake

import recipe

TABLE_URI = str(Path(__file__).parent / "data" / "data_bundle" /
                "sec_fundamentals_pit" / "1784818614" / "data.delta")


def _row_hash(df: pl.DataFrame) -> pl.Series:
    cols = [c for c in df.columns if c != "ingested_at"]
    return df.select(cols).hash_rows().cast(pl.Utf8)


async def main(since: datetime) -> None:
    fresh = await recipe.fetch(since)
    if fresh.is_empty():
        print("no rows"); return
    fresh = fresh.with_columns(pl.lit(datetime.now(timezone.utc)).alias("ingested_at"))
    try:
        existing = pl.from_arrow(DeltaTable(TABLE_URI).to_pyarrow_table())
        seen = set(_row_hash(existing).to_list())
        fresh = fresh.filter(~_row_hash(fresh).is_in(seen))
    except Exception:
        pass
    if fresh.is_empty():
        print("no new/revised rows"); return
    write_deltalake(TABLE_URI, fresh.to_arrow(), mode="append", partition_by=["knowledge_year"])
    print(f"appended {len(fresh)} rows")


if __name__ == "__main__":
    ap = argparse.ArgumentParser(); ap.add_argument("--since", default="2020-01-01")
    import asyncio
    asyncio.run(main(datetime.fromisoformat(ap.parse_args().since).replace(tzinfo=timezone.utc)))