"""Cross-jurisdiction analysis of Goldenset vs prediction CSVs.

Builds on `legex.evaluation.score_country`: reuses the (tp, mismatch, missed,
hallucinated, tn) per-cell buckets and exposes paper-headline aggregates —
hallucination rate, recall-when-filled, miss rate — across countries, fields,
models, legal traditions, and language families.

Outputs CSV + LaTeX tables under ``--out`` (default ``data/analysis``).
"""

import argparse
import csv
import logging
import re
import sys
from collections import defaultdict
from pathlib import Path

from legex import published
from legex.config import settings
from legex.evaluation import BUCKETS, derived, score_country
from legex.utils import countries_with_goldenset

log = logging.getLogger(__name__)


# Paper §A. Static maps — adding a jurisdiction = adding two entries.
LEGAL_TRADITION: dict[str, str] = {
    "au": "common", "hk": "common", "in": "common", "nz": "common",
    "sg": "common", "uk": "common", "us": "common", "gh": "common",
    "ph": "common",
    "am": "civil", "at": "civil", "be": "civil", "br": "civil",
    "ch": "civil", "de": "civil", "es": "civil", "fr": "civil",
    "ge": "civil", "it": "civil", "li": "civil", "lu": "civil",
    "np": "civil", "rs": "civil", "tw": "civil", "xk": "civil",
    "al": "civil",
}

LANGUAGE_FAMILY: dict[str, str] = {
    "au": "en-latin", "hk": "en-latin", "in": "en-latin", "nz": "en-latin",
    "sg": "en-latin", "uk": "en-latin", "us": "en-latin", "gh": "en-latin",
    "ph": "en-latin",
    "at": "eu-latin", "be": "eu-latin", "br": "eu-latin", "ch": "eu-latin",
    "de": "eu-latin", "es": "eu-latin", "fr": "eu-latin", "it": "eu-latin",
    "li": "eu-latin", "lu": "eu-latin", "rs": "eu-latin", "al": "eu-latin",
    "xk": "eu-latin",
    "am": "non-latin", "ge": "non-latin", "np": "non-latin", "tw": "non-latin",
}


COST_BLOCK: tuple[str, ...] = (
    "dispute_value_nominal",
    "plaintiff_loosing_share",
    "court_cost_awarded_nominal",
    "party_compensation_awarded_nominal",
)


DERIVED_KEYS = (
    "accuracy",
    "recall_when_filled",
    "precision_when_emitted",
    "hallucination_rate",
    "miss_rate",
    "wrong_when_both_filled",
    "f1",
)


def derived_metrics(c: dict[str, int]) -> dict[str, float]:
    """Seven paper-headline metrics from a single bucket counter."""
    tp, mism, miss, hallu, tn = c["tp"], c["mismatch"], c["missed"], c["hallucinated"], c["tn"]
    total = tp + mism + miss + hallu + tn
    filled_gold = tp + mism + miss
    empty_gold = hallu + tn
    both_filled = tp + mism
    p, r, f1 = derived(c)
    return {
        "accuracy": (tp + tn) / total if total else 0.0,
        "recall_when_filled": r,
        "precision_when_emitted": p,
        "hallucination_rate": hallu / empty_gold if empty_gold else 0.0,
        "miss_rate": miss / filled_gold if filled_gold else 0.0,
        "wrong_when_both_filled": mism / both_filled if both_filled else 0.0,
        "f1": f1,
    }


def add_buckets(a: dict[str, int], b: dict[str, int]) -> dict[str, int]:
    return {k: a.get(k, 0) + b.get(k, 0) for k in BUCKETS}


def sum_buckets(counters: dict[str, dict[str, int]], cols: tuple[str, ...] | None = None) -> dict[str, int]:
    """Sum bucket counts across `cols` (or all columns when None)."""
    out = {k: 0 for k in BUCKETS}
    for col, c in counters.items():
        if cols is not None and col not in cols:
            continue
        for k in BUCKETS:
            out[k] += c[k]
    return out


_INFERENCE_FILENAME_RE = re.compile(r"^Goldenset_(.+?)_(v\d+)_(full_text|pdf)_(.+)\.jsonl$")


def models_present(cc: str, inference_dir: Path | None = None) -> list[str]:
    """Inverse of `model_filename_slug`: which models have an inference file for `cc`."""
    if inference_dir is not None:
        return sorted(
            model for model in published.MODEL_FILES
            if published.inference_file(inference_dir, cc, model).exists()
        )
    d = settings.data_dir / cc
    if not d.is_dir():
        return []
    found: set[str] = set()
    for p in d.glob("Goldenset_*_v*_*.jsonl"):
        m = _INFERENCE_FILENAME_RE.match(p.name)
        if not m:
            continue
        slug = m.group(4)
        # `gemini_gemini-3.1-flash-lite` <- `gemini/gemini-3.1-flash-lite`.
        # We can't safely un-slug arbitrary slashes, so look for known providers.
        if slug.startswith("gemini_"):
            found.add("gemini/" + slug[len("gemini_"):])
        elif slug.startswith("anthropic_"):
            found.add("anthropic/" + slug[len("anthropic_"):])
        else:
            found.add(slug)
    return sorted(found)


def collect(
    countries: list[str],
    models: list[str],
    prompt_version: str,
    source: str,
    gold_dir: Path | None = None,
    inference_dir: Path | None = None,
) -> list[tuple[str, str, dict[str, dict[str, int]]]]:
    """Score every (country, model) pair. Returns rows of (cc, model, counters)."""
    rows: list[tuple[str, str, dict[str, dict[str, int]]]] = []
    for cc in countries:
        ms = models or models_present(cc, inference_dir)
        for model in ms:
            result = score_country(
                cc, prompt_version, source, model, verbose=False,
                gold_dir=gold_dir, inference_dir=inference_dir,
            )
            if result is None:
                log.info(f"[{cc}/{model}] no scoreable data, skipping")
                continue
            counters, _coverage = result
            rows.append((cc, model, counters))
            log.info(f"[{cc}/{model}] scored {len(counters)} columns")
    return rows


def _fmt(v: float) -> str:
    return f"{v:.4f}"


def _write_csv(path: Path, header: list[str], rows: list[dict[str, object]]) -> None:
    path.parent.mkdir(parents=True, exist_ok=True)
    with open(path, "w", encoding="utf-8", newline="") as f:
        w = csv.DictWriter(f, fieldnames=header, extrasaction="ignore")
        w.writeheader()
        w.writerows(rows)


def write_per_country_per_column(out: Path, rows: list[tuple[str, str, dict[str, dict[str, int]]]]) -> None:
    header = ["country", "model", "column", *BUCKETS, *DERIVED_KEYS]
    out_rows: list[dict[str, object]] = []
    for cc, model, counters in rows:
        for col, c in counters.items():
            d = derived_metrics(c)
            out_rows.append({
                "country": cc, "model": model, "column": col,
                **c, **{k: _fmt(d[k]) for k in DERIVED_KEYS},
            })
    _write_csv(out / "per_country_per_column.csv", header, out_rows)


def write_per_country(out: Path, rows: list[tuple[str, str, dict[str, dict[str, int]]]]) -> None:
    """One row per (cc, model): summed buckets across all label columns, plus
    cost-block-only summed buckets. Also adds tradition / language tags."""
    header = [
        "country", "model", "legal_tradition", "language_family",
        *BUCKETS, *DERIVED_KEYS,
        *(f"cost_{k}" for k in BUCKETS),
        *(f"cost_{k}" for k in DERIVED_KEYS),
    ]
    out_rows: list[dict[str, object]] = []
    for cc, model, counters in rows:
        all_b = sum_buckets(counters)
        cost_b = sum_buckets(counters, COST_BLOCK)
        d_all = derived_metrics(all_b)
        d_cost = derived_metrics(cost_b)
        out_rows.append({
            "country": cc, "model": model,
            "legal_tradition": LEGAL_TRADITION.get(cc, ""),
            "language_family": LANGUAGE_FAMILY.get(cc, ""),
            **all_b,
            **{k: _fmt(d_all[k]) for k in DERIVED_KEYS},
            **{f"cost_{k}": cost_b[k] for k in BUCKETS},
            **{f"cost_{k}": _fmt(d_cost[k]) for k in DERIVED_KEYS},
        })
    _write_csv(out / "per_country.csv", header, out_rows)


def write_per_column(out: Path, rows: list[tuple[str, str, dict[str, dict[str, int]]]]) -> None:
    """One row per (model, column): summed across countries."""
    agg: dict[tuple[str, str], dict[str, int]] = defaultdict(lambda: {k: 0 for k in BUCKETS})
    for _cc, model, counters in rows:
        for col, c in counters.items():
            for k in BUCKETS:
                agg[(model, col)][k] += c[k]
    header = ["model", "column", *BUCKETS, *DERIVED_KEYS]
    out_rows: list[dict[str, object]] = []
    for (model, col), c in sorted(agg.items()):
        d = derived_metrics(c)
        out_rows.append({
            "model": model, "column": col, **c,
            **{k: _fmt(d[k]) for k in DERIVED_KEYS},
        })
    _write_csv(out / "per_column.csv", header, out_rows)


def _write_grouped(
    out: Path, name: str, group_map: dict[str, str],
    rows: list[tuple[str, str, dict[str, dict[str, int]]]],
) -> None:
    agg: dict[tuple[str, str], dict[str, int]] = defaultdict(lambda: {k: 0 for k in BUCKETS})
    cost_agg: dict[tuple[str, str], dict[str, int]] = defaultdict(lambda: {k: 0 for k in BUCKETS})
    counts: dict[tuple[str, str], int] = defaultdict(int)
    for cc, model, counters in rows:
        group = group_map.get(cc)
        if group is None:
            continue
        key = (model, group)
        all_b = sum_buckets(counters)
        cost_b = sum_buckets(counters, COST_BLOCK)
        for k in BUCKETS:
            agg[key][k] += all_b[k]
            cost_agg[key][k] += cost_b[k]
        counts[key] += 1
    header = [
        "model", "group", "n_countries",
        *BUCKETS, *DERIVED_KEYS,
        *(f"cost_{k}" for k in BUCKETS),
        *(f"cost_{k}" for k in DERIVED_KEYS),
    ]
    out_rows: list[dict[str, object]] = []
    for (model, group), c in sorted(agg.items()):
        cost_c = cost_agg[(model, group)]
        d_all = derived_metrics(c)
        d_cost = derived_metrics(cost_c)
        out_rows.append({
            "model": model, "group": group,
            "n_countries": counts[(model, group)],
            **c,
            **{k: _fmt(d_all[k]) for k in DERIVED_KEYS},
            **{f"cost_{k}": cost_c[k] for k in BUCKETS},
            **{f"cost_{k}": _fmt(d_cost[k]) for k in DERIVED_KEYS},
        })
    _write_csv(out / f"{name}.csv", header, out_rows)


def _latex_escape(s: str) -> str:
    return s.replace("\\", "\\textbackslash{}").replace("&", "\\&").replace("_", "\\_").replace("%", "\\%")


def _pct(v: float) -> str:
    return f"{v * 100:5.1f}\\%"


def write_headline_latex(out: Path, rows: list[tuple[str, str, dict[str, dict[str, int]]]]) -> None:
    """One LaTeX `tabular` per model: rows = jurisdiction, cols = headline metrics."""
    by_model: dict[str, list[tuple[str, dict[str, dict[str, int]]]]] = defaultdict(list)
    for cc, model, counters in rows:
        by_model[model].append((cc, counters))

    out.mkdir(parents=True, exist_ok=True)
    lines: list[str] = []
    for model in sorted(by_model):
        lines.append("% Auto-generated by legex-analysis.")
        lines.append("\\begin{table}[h]")
        lines.append(
            "\\caption{Headline extraction metrics by jurisdiction for model \\texttt{"
            f"{_latex_escape(model)}"
            "}. Accuracy is per-cell. Recall is over the cells where the expert recorded a value. "
            "Hallucination rate is the share of legitimately-empty cells where the model invented a value. "
            "Cost-block $F_1$ aggregates over the four monetary variables.}"
        )
        lines.append("\\label{tab:headline-" + re.sub(r"[^a-zA-Z0-9]+", "-", model).strip("-") + "}")
        lines.append("\\centering\\small")
        lines.append("\\begin{tabular}{@{}lrrrr@{}}")
        lines.append("\\toprule")
        lines.append("Jurisdiction & Accuracy & Recall$_{\\text{filled}}$ & Hallu. rate & Cost $F_1$ \\\\")
        lines.append("\\midrule")
        for cc, counters in sorted(by_model[model]):
            d_all = derived_metrics(sum_buckets(counters))
            d_cost = derived_metrics(sum_buckets(counters, COST_BLOCK))
            lines.append(
                f"{cc.upper()} & {_pct(d_all['accuracy'])} & {_pct(d_all['recall_when_filled'])} "
                f"& {_pct(d_all['hallucination_rate'])} & {d_cost['f1']:.3f} \\\\"
            )
        lines.append("\\bottomrule")
        lines.append("\\end{tabular}")
        lines.append("\\end{table}")
        lines.append("")
    (out / "headline.tex").write_text("\n".join(lines), encoding="utf-8")


def write_per_field_latex(out: Path, rows: list[tuple[str, str, dict[str, dict[str, int]]]]) -> None:
    """One LaTeX table per model: rows = variable, cols = headline metrics (summed across jurisdictions)."""
    by_model_col: dict[str, dict[str, dict[str, int]]] = defaultdict(lambda: defaultdict(lambda: {k: 0 for k in BUCKETS}))
    for _cc, model, counters in rows:
        for col, c in counters.items():
            for k in BUCKETS:
                by_model_col[model][col][k] += c[k]

    out.mkdir(parents=True, exist_ok=True)
    lines: list[str] = []
    for model in sorted(by_model_col):
        lines.append("% Auto-generated by legex-analysis.")
        lines.append("\\begin{table}[h]")
        lines.append(
            "\\caption{Per-field extraction metrics, summed across jurisdictions, for model \\texttt{"
            f"{_latex_escape(model)}"
            "}.}"
        )
        lines.append("\\label{tab:per-field-" + re.sub(r"[^a-zA-Z0-9]+", "-", model).strip("-") + "}")
        lines.append("\\centering\\small")
        lines.append("\\begin{tabular}{@{}lrrrr@{}}")
        lines.append("\\toprule")
        lines.append("Variable & Accuracy & Recall$_{\\text{filled}}$ & Hallu. rate & $F_1$ \\\\")
        lines.append("\\midrule")
        for col, c in sorted(by_model_col[model].items()):
            d = derived_metrics(c)
            lines.append(
                f"\\texttt{{{_latex_escape(col)}}} & {_pct(d['accuracy'])} "
                f"& {_pct(d['recall_when_filled'])} & {_pct(d['hallucination_rate'])} "
                f"& {d['f1']:.3f} \\\\"
            )
        lines.append("\\bottomrule")
        lines.append("\\end{tabular}")
        lines.append("\\end{table}")
        lines.append("")
    (out / "per_field.tex").write_text("\n".join(lines), encoding="utf-8")


def analyse(
    countries: list[str] | None,
    models: list[str] | None,
    prompt_version: str,
    source: str,
    out_dir: Path,
    gold_dir: Path | None = None,
    inference_dir: Path | None = None,
) -> None:
    if countries is None:
        countries = (
            published.countries_with_gold(gold_dir)
            if gold_dir is not None
            else countries_with_goldenset()
        )
    rows = collect(countries, models or [], prompt_version, source, gold_dir, inference_dir)
    if not rows:
        log.warning("no (country, model) pairs produced results; nothing to write")
        return
    out_dir.mkdir(parents=True, exist_ok=True)
    write_per_country_per_column(out_dir, rows)
    write_per_country(out_dir, rows)
    write_per_column(out_dir, rows)
    _write_grouped(out_dir, "per_tradition", LEGAL_TRADITION, rows)
    _write_grouped(out_dir, "per_language", LANGUAGE_FAMILY, rows)
    write_headline_latex(out_dir / "tables", rows)
    write_per_field_latex(out_dir / "tables", rows)
    log.info(f"wrote analysis for {len(rows)} (country, model) pairs to {out_dir}")


def main() -> None:
    logging.basicConfig(
        level=logging.INFO,
        format="%(asctime)s [%(levelname)s] %(message)s",
        handlers=[logging.StreamHandler(sys.stderr)],
    )
    parser = argparse.ArgumentParser(
        prog="legex-analysis",
        description="Cross-jurisdiction analysis of Goldenset vs LLM predictions.",
    )
    parser.add_argument(
        "--country", action="extend", nargs="+", dest="countries",
        help="Country code(s). Repeatable. Default: all countries with a Goldenset.",
    )
    parser.add_argument(
        "--model", action="append", dest="models",
        help="Model id (repeatable). Default: every model with an inference file per country.",
    )
    parser.add_argument("--prompt_version", default="v3")
    parser.add_argument(
        "--out", type=Path, default=Path("data/analysis"),
        help="Output directory (default: data/analysis).",
    )
    parser.add_argument(
        "--gold-dir", type=Path, default=None,
        help="Read gold labels from published goldenset JSONL under this directory "
             "instead of the XLSX workbooks.",
    )
    parser.add_argument(
        "--inference-dir", type=Path, default=None,
        help="Read predictions from published inference JSONL under this directory "
             "instead of the working files.",
    )
    src = parser.add_mutually_exclusive_group()
    src.add_argument("--full_text", dest="source", action="store_const", const="full_text")
    src.add_argument("--pdf", dest="source", action="store_const", const="pdf")
    args = parser.parse_args()
    if args.inference_dir is None and args.source is None:
        parser.error("one of --full_text / --pdf is required (unless --inference-dir is used)")
    analyse(
        countries=args.countries,
        models=args.models,
        prompt_version=args.prompt_version,
        source=args.source,
        out_dir=args.out,
        gold_dir=args.gold_dir,
        inference_dir=args.inference_dir,
    )


if __name__ == "__main__":
    main()