ely-eye/bench/leg_check.py

"""What each retrieval leg is actually worth, on the frozen suite, asked as its holder.

The product fuses three legs with reciprocal rank fusion: a sparse page, a dense vector leg, and a
picture leg that only speaks up when the words come back thin. Each one costs latency and a model
snapshot, and the suite is the only honest referee. This harness turns each leg on and off over the
same probes and prints recall, first-hit quality, latency, and per-modality recall in one table, so
a default like `dense_embeddings_enabled=False` is a measurement rather than a preference.

Run: python -m bench.leg_check [--probes 300]
Writes: bench/reports/LEGS.md, bench/reports/leg_check.json
"""

from __future__ import annotations

import argparse
import json
import shutil
import statistics
import sys
import time
from pathlib import Path
from typing import Any

from bench.metrics import aggregate, score_query
from bench.query_set import load_queries, scale_probes
from bench.report import git_commit
from bench.run import latency
from bench.scratch import copy_store
from bench.systems import machine_facts

DEFAULT_HOME = Path("bench/runs/dense_scale")
DEFAULT_SCRATCH = Path("bench/runs/leg_check")
DEFAULT_OBJECTS = Path("bench/runs/baseline/objects")
DEFAULT_CLIP_INDEX = Path("bench/runs/leg_check_index")
DEFAULT_CLIP_MODEL = Path("bench/models/chinese-clip-vit-base-patch16")
DEFAULT_EMBEDDING_MODEL = Path("bench/models/paraphrase-multilingual-MiniLM-L12-v2")

# The page size the product asks for by default. measure() checks it against the product's own
# setting, so a config change here cannot quietly turn the "as shipped" row into a hypothetical.
SHIPPED_TOP_K = 24

# (label, atoms asked, dense leg, picture leg). The picture leg routes itself: it answers only when
# the sparse page comes back thin, which is the product's rule, not this harness's.
CONFIGS: list[dict[str, Any]] = [
    {"label": "words only", "top_k": 10, "dense": False, "visual": False},
    {"label": "words only (the configured 24)", "top_k": SHIPPED_TOP_K, "dense": False, "visual": False},
    {"label": "words only, wider page", "top_k": 30, "dense": False, "visual": False},
    {"label": "+ dense leg", "top_k": 10, "dense": True, "visual": False},
    {"label": "+ dense leg, wider page", "top_k": 30, "dense": True, "visual": False},
    {"label": "+ picture leg", "top_k": 10, "dense": False, "visual": True},
    {"label": "+ picture leg, wider page", "top_k": 30, "dense": False, "visual": True},
]


def prepare(
    home: Path,
    scratch: Path,
    objects: Path,
    clip_index: Path,
    *,
    dense: bool,
    visual: bool,
    clip_model: Path,
    embedding_model: Path,
) -> Path:
    """Build a scratch store that can run every leg: vectors, the picture index, and the bytes.

    The picture index and the CLIP snapshot are 48 minutes of encoding, so they are carried in from
    wherever they were built rather than rebuilt per row.
    """
    copy_home, _ = copy_store(home, scratch)
    if visual:
        for name in ("clip_image_index.npy", "clip_image_index_atoms.json"):
            source = clip_index / name
            if not source.exists():
                raise SystemExit(
                    f"{source}: the picture index has not been built; run `ely-eye index-visual` "
                    "with ELY_EYE_CLIP_MODEL_DIR set, or point --clip-index at its cache"
                )
            (copy_home / "cache").mkdir(parents=True, exist_ok=True)
            shutil.copy2(source, copy_home / "cache" / name)
        if not (clip_model / "onnx" / "model_fp16.onnx").exists():
            raise SystemExit(f"{clip_model / 'onnx' / 'model_fp16.onnx'}: the CLIP snapshot is missing")
        if not objects.is_dir():
            raise SystemExit(f"{objects}: the picture leg needs the object store to check image bytes")
        link = copy_home / "objects"
        if not link.exists() and not link.is_symlink():
            link.symlink_to(objects.resolve())
    if dense and not (embedding_model / "config.json").exists():
        raise SystemExit(f"{embedding_model}: the embedding snapshot is missing; the dense leg cannot run")

    return copy_home


def _schema(home: Path) -> int:
    import sqlite3

    with sqlite3.connect(home / "data" / "ely_eye.sqlite") as connection:
        return int(connection.execute("PRAGMA user_version").fetchone()[0])


def rank_all(service: Any, ids: dict[str, str], probes: list[Any], top_k: int) -> tuple[list[list[str]], list[int], list[float]]:
    """Ask the product as each probe's own holder and collapse atoms to sources by first hit."""
    from ely_eye.schemas import SearchFilters

    rankings: list[list[str]] = []
    distinct: list[int] = []
    timings: list[float] = []
    for index, query in enumerate(probes):
        began = time.perf_counter()
        hits = service.search(query.text, top_k=top_k, filters=SearchFilters(as_holder=query.holder)).hits
        timings.append(time.perf_counter() - began)
        sources: list[str] = []
        for hit in hits:
            source = ids[hit.atom.source_id]
            if source not in sources:
                sources.append(source)
        distinct.append(len(sources))
        rankings.append(sources)
        if (index + 1) % 100 == 0:
            print(f"    {index + 1}/{len(probes)}", flush=True)
    return rankings, distinct, timings


def measure(home: Path, scratch: Path, objects: Path, clip_index: Path, probes: int, models: dict[str, Path]) -> dict[str, Any]:
    """Score every configuration on the same probes, one warm service per configuration."""
    from ely_eye.config import Settings
    from ely_eye.db import Database
    from ely_eye.retrieval import RetrievalService

    shipped = Settings().retrieval_top_k
    if shipped != SHIPPED_TOP_K:
        raise SystemExit(
            f"the product asks for {shipped} atoms per search but this harness pins "
            f"SHIPPED_TOP_K={SHIPPED_TOP_K}; update the rows before trusting the 'as shipped' label"
        )

    chosen = scale_probes(load_queries(), probes)
    answerable = [query for query in chosen if query.gold]
    if not answerable:
        raise SystemExit("the frozen suite carries no answerable query; nothing to score")
    print(f"{len(answerable)} answerable probes", flush=True)

    arms: list[dict[str, Any]] = []
    schema = 0
    for config in CONFIGS:
        print(f"  {config['label']}: dense={config['dense']} visual={config['visual']}", flush=True)
        copy_home = prepare(
            home,
            scratch,
            objects,
            clip_index,
            dense=config["dense"],
            visual=config["visual"],
            clip_model=models["clip"],
            embedding_model=models["embedding"],
        )
        schema = _schema(copy_home)
        settings = Settings(
            home=copy_home,
            dense_embeddings_enabled=config["dense"],
            embedding_model_dir=models["embedding"] if config["dense"] else None,
            clip_model_dir=models["clip"] if config["visual"] else None,
        )
        database = Database(settings)
        service = RetrievalService(settings=settings, database=database)
        ids = _source_ids(database)
        rankings, distinct, timings = rank_all(service, ids, answerable, int(config["top_k"]))
        scores = [
            score_query(query.query_id, ranking, set(query.gold), query.holder)
            for query, ranking in zip(answerable, rankings, strict=True)
        ]
        summary = aggregate(scores)
        timing = latency(timings)
        by_modality: dict[str, list[float]] = {}
        for query, score in zip(answerable, scores, strict=True):
            by_modality.setdefault(query.modality, []).append(score.recall_at_10)
        arms.append(
            {
                "label": config["label"],
                "top_k": config["top_k"],
                "dense": config["dense"],
                "visual": config["visual"],
                "recall_at_10": summary["recall_at_10"],
                "mrr": summary["mrr"],
                "hit_at_10": summary["hit_at_10"],
                "wilson_lower": summary["hit_at_10_wilson_lower"],
                "p50_seconds": timing["p50"],
                "p95_seconds": timing["p95"],
                "median_distinct_sources": statistics.median(distinct),
                "by_modality": {
                    modality: sum(rows) / len(rows) for modality, rows in sorted(by_modality.items())
                },
                "modality_counts": {modality: len(rows) for modality, rows in sorted(by_modality.items())},
            }
        )
        print(
            f"    recall@10 {summary['recall_at_10']:.3f}, mrr {summary['mrr']:.3f}, "
            f"p50 {timing['p50'] * 1000:.1f}ms",
            flush=True,
        )
    return {
        "commit": git_commit(),
        "schema_version": schema,
        "store": str(scratch / "data" / "ely_eye.sqlite"),
        "probes": len(answerable),
        "arms": arms,
        "machine": machine_facts(),
    }


def _source_ids(database: Any) -> dict[str, str]:
    """Store source id to benchmark source id, the same mapping every other arm uses."""
    from bench.systems import _corpus_ids

    return _corpus_ids(database)


def write_markdown(report: dict[str, Any], path: Path) -> None:
    machine = report["machine"]
    header = [
        "| leg configuration | atoms asked | recall@10 | MRR | hit@10 | 95% lower | p50 ms | p95 ms | distinct sources |",
        "| --- | --- | --- | --- | --- | --- | --- | --- | --- |",
    ]
    rows = []
    for arm in report["arms"]:
        rows.append(
            f"| {arm['label']} | {arm['top_k']} | {arm['recall_at_10']:.3f} | {arm['mrr']:.3f} | "
            f"{arm['hit_at_10']:.3f} | {arm['wilson_lower']:.3f} | {arm['p50_seconds'] * 1000:.1f} | "
            f"{arm['p95_seconds'] * 1000:.1f} | {arm['median_distinct_sources']} |"
        )
    modalities = sorted({modality for arm in report["arms"] for modality in arm["by_modality"]})
    modality_rows = [
        "| leg configuration | " + " | ".join(modalities) + " |",
        "| --- |" + " --- |" * len(modalities),
    ]
    for arm in report["arms"]:
        modality_rows.append(
            f"| {arm['label']} | "
            + " | ".join(f"{arm['by_modality'].get(modality, float('nan')):.3f}" for modality in modalities)
            + " |"
        )
    counts = report["arms"][0]["modality_counts"]
    path.write_text(
        "\n".join(
            [
                "# LEGS: what each retrieval leg is worth",
                "",
                f"- commit: `{report['commit']}`, schema v{report['schema_version']}",
                f"- store: {report['store']} (a copy of {DEFAULT_HOME}; the frozen baseline is never opened)",
                f"- {report['probes']} answerable queries, each asked as the holder the frozen set assigns it",
                (
                    f"- machine: {machine['system']} {machine['release']}, {machine['cpus']} cores, "
                    f"{machine['threads_per_query']} threads per query, load {machine['load_average_1_5_15']}"
                ),
                "",
                "Recall is scored on the first ten **sources** after atoms are collapsed to their source",
                "by first hit, which is how every other arm in this repo is scored.",
                "",
                *header,
                *rows,
                "",
                "## recall@10 by modality",
                "",
                *modality_rows,
                "",
                f"_Query counts per modality: {', '.join(f'{name} {count}' for name, count in counts.items())}._",
                "",
                (
                    "The picture leg is not a switch this harness flips per row: the product runs it only "
                    "when the sparse page comes back thin, so these rows measure the product with the leg "
                    "available, not a forced always-on fusion."
                ),
                "",
                (
                    "_Latency is wall time per search on the machine named above with the thread budget "
                    "the benchmark pins; a run on a loaded machine is not comparable._"
                ),
                "",
            ]
        ),
        encoding="utf-8",
    )


def main() -> None:
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument("--home", type=Path, default=DEFAULT_HOME)
    parser.add_argument("--scratch", type=Path, default=DEFAULT_SCRATCH)
    parser.add_argument("--objects", type=Path, default=DEFAULT_OBJECTS)
    parser.add_argument("--clip-index", type=Path, default=DEFAULT_CLIP_INDEX)
    parser.add_argument("--clip-model", type=Path, default=DEFAULT_CLIP_MODEL)
    parser.add_argument("--embedding-model", type=Path, default=DEFAULT_EMBEDDING_MODEL)
    parser.add_argument("--probes", type=int, default=300)
    parser.add_argument("--out", type=Path, default=Path("bench/reports/LEGS.md"))
    parser.add_argument("--json-out", type=Path, default=Path("bench/reports/leg_check.json"))
    args = parser.parse_args()

    report = measure(
        args.home,
        args.scratch,
        args.objects,
        args.clip_index,
        args.probes,
        {"clip": args.clip_model, "embedding": args.embedding_model},
    )
    args.json_out.parent.mkdir(parents=True, exist_ok=True)
    args.json_out.write_text(json.dumps(report, indent=2, ensure_ascii=False), encoding="utf-8")
    write_markdown(report, args.out)
    print(f"wrote {args.out}")


if __name__ == "__main__":
    if sys.version_info < (3, 11):
        raise SystemExit("bench needs Python 3.11+")
    main()