#!/usr/bin/env python3
"""Score canonical-key predictions on the fixed QT26-QC denominator."""

from __future__ import annotations

import argparse
import csv
import json
from pathlib import Path

import numpy as np

from bootstrap import cluster_interval


K_VALUES = (1, 5, 20)


def read_tsv(path: Path) -> list[dict[str, str]]:
    with path.open("r", encoding="utf-8", newline="") as handle:
        return list(csv.DictReader(handle, delimiter="\t"))


def normalize_predictions(row: dict[str, str], valid: set[str]) -> list[str]:
    normalized: list[str] = []
    seen_valid: set[str] = set()
    for rank in range(1, 21):
        value = row.get(f"top{rank}", "").strip()
        if value in valid:
            if value in seen_valid:
                continue
            seen_valid.add(value)
        normalized.append(value or f"__MISSING_RANK_{rank}__")
    while len(normalized) < 20:
        normalized.append(f"__MISSING_AFTER_DEDUP_{len(normalized) + 1}__")
    return normalized[:20]


def load_predictions(
    path: Path, public_ids: set[str], valid: set[str]
) -> dict[str, list[str]]:
    rows = read_tsv(path)
    result: dict[str, list[str]] = {}
    for row in rows:
        public_id = row.get("public_id", "")
        if public_id in result:
            raise ValueError(f"duplicate public_id: {public_id}")
        result[public_id] = normalize_predictions(row, valid)
    missing = public_ids - result.keys()
    extra = result.keys() - public_ids
    if missing or extra:
        raise ValueError(f"submission IDs differ: missing={len(missing)}, extra={len(extra)}")
    return result


def score_one(
    truth_rows: list[dict[str, str]], predictions: dict[str, list[str]], replicates: int, seed: int
) -> tuple[dict[str, object], dict[int, np.ndarray]]:
    species = np.asarray([row["canonical_taxon_key"] for row in truth_rows])
    hits: dict[int, np.ndarray] = {}
    metrics: dict[str, object] = {}
    for k in K_VALUES:
        vector = np.asarray(
            [
                row["canonical_taxon_key"] in predictions[row["public_id"]][:k]
                for row in truth_rows
            ],
            dtype=np.float64,
        )
        hits[k] = vector
        micro = cluster_interval(vector, species, replicates=replicates, seed=seed, macro=False)
        macro = cluster_interval(vector, species, replicates=replicates, seed=seed, macro=True)
        metrics[f"top{k}"] = {
            "query_micro": {"estimate": micro[0], "ci95": [micro[1], micro[2]]},
            "species_macro": {"estimate": macro[0], "ci95": [macro[1], macro[2]]},
        }
    return metrics, hits


def main() -> int:
    root = Path(__file__).resolve().parents[1]
    parser = argparse.ArgumentParser()
    parser.add_argument("predictions", type=Path)
    parser.add_argument("--compare", type=Path)
    parser.add_argument("--roster", type=Path, default=root / "metadata" / "canonical-roster.tsv")
    parser.add_argument("--taxonomy", type=Path, default=root / "metadata" / "taxonomy-fishbase-25.04.tsv")
    parser.add_argument("--replicates", type=int, default=20_000)
    parser.add_argument("--seed", type=int, default=20260730)
    parser.add_argument("--output", type=Path)
    args = parser.parse_args()

    truth = read_tsv(args.roster)
    if len(truth) != 6_719 or len({row["canonical_taxon_key"] for row in truth}) != 3_121:
        raise ValueError("canonical roster denominator mismatch")
    taxonomy = read_tsv(args.taxonomy)
    valid = {row["canonical_taxon_key"] for row in taxonomy}
    ids = {row["public_id"] for row in truth}
    predictions = load_predictions(args.predictions, ids, valid)
    metrics, hits = score_one(truth, predictions, args.replicates, args.seed)
    output: dict[str, object] = {
        "status": "PASS",
        "queries": len(truth),
        "taxa": len({row["canonical_taxon_key"] for row in truth}),
        "bootstrap": {
            "unit": "target_species",
            "replicates": args.replicates,
            "seed": args.seed,
        },
        "metrics": metrics,
    }
    if args.compare:
        baseline = load_predictions(args.compare, ids, valid)
        _, baseline_hits = score_one(truth, baseline, args.replicates, args.seed)
        current = hits[1].astype(bool)
        previous = baseline_hits[1].astype(bool)
        output["top1_transition"] = {
            "wrong_to_right": int(np.sum(~previous & current)),
            "right_to_wrong": int(np.sum(previous & ~current)),
            "net_correct": int(np.sum(current) - np.sum(previous)),
        }
    text = json.dumps(output, indent=2, sort_keys=True) + "\n"
    if args.output:
        args.output.write_text(text, encoding="utf-8")
    print(text, end="")
    return 0


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