"""Loaders for the published LEGEX JSONL bundles (HF ``legexbenchmark``).

The released datasets carry everything the evaluation needs:

- ``goldensets/data/<cc>/goldenset_<cc>.jsonl`` — the first row per
  ``case_id`` is the primary gold annotation; further rows for the same
  ``case_id`` are independent reannotations, keyed by their salted
  ``annotator_id``.
- ``inference-results/data/<cc>/inference_<name>.jsonl`` — one file per
  system run, same record layout as ``legex.inference`` output.

These loaders let scoring, IAA, and the AAT run directly on the published
files (pass ``--gold-dir`` / ``--inference-dir`` to the CLIs). The XLSX
workbook mode remains the maintainers' path.
"""

import json
import logging
from pathlib import Path

from legex.evaluation.comparison import is_label_column, normalise
from legex.utils import norm_case_id

log = logging.getLogger(__name__)

# Role label for the primary (gold) annotation, shared with legex.analysis.iaa.
PRIMARY = "primary"

# The 14 schema fields, in template order (see legex/models/classification.py).
SCHEMA_FIELDS: tuple[str, ...] = (
    "legal_subject_judgement",
    "trial_start_date",
    "trial_end_date",
    "dispute_value_nominal",
    "Currency_dispute_value_nominal",
    "plaintiff_loosing_share",
    "court_cost_awarded_nominal",
    "Currency_court_cost_awarded_nominal",
    "party_compensation_awarded_nominal",
    "Currency_party_compensation_awarded_nominal",
    "plaintiffs_all_count",
    "defendants_all_count",
    "plaintiff_no1_ISIC1_industry_category",
    "defendant_no1_ISIC1_industry_category",
)

# The 11 evaluated fields (currencies are scored via their amount field).
LABEL_FIELDS: tuple[str, ...] = tuple(f for f in SCHEMA_FIELDS if is_label_column(f))

# model id (as used throughout the analysis) -> published file name part.
MODEL_FILES: dict[str, str] = {
    "gemini/gemini-3.1-flash-lite": "gemini",
    "gpt-5.4-mini": "gpt",
    "harvey": "harvey",
    "harvey-2": "harvey_2",
    "legora-1": "legora_1",
    "legora-2": "legora_2",
}


def default_gold_dir(repo_root: Path) -> Path:
    """``submission/goldensets/data`` in the working repo; the sibling
    ``goldensets`` clone next to the published code bundle."""
    for cand in (
        repo_root / "submission" / "goldensets" / "data",
        repo_root.parent / "goldensets" / "data",
    ):
        if cand.is_dir():
            return cand
    raise SystemExit(
        "no published goldensets found — clone "
        "https://huggingface.co/datasets/legexbenchmark/goldensets next to this "
        "repository or pass --gold-dir"
    )


def default_inference_dir(repo_root: Path) -> Path:
    """``submission/inference-results/data`` in the working repo; the sibling
    ``inference-results`` clone next to the published code bundle."""
    for cand in (
        repo_root / "submission" / "inference-results" / "data",
        repo_root.parent / "inference-results" / "data",
    ):
        if cand.is_dir():
            return cand
    raise SystemExit(
        "no published inference results found — clone "
        "https://huggingface.co/datasets/legexbenchmark/inference-results next to "
        "this repository or pass --inference-dir"
    )


def gold_file(gold_dir: Path, cc: str) -> Path:
    return Path(gold_dir) / cc / f"goldenset_{cc}.jsonl"


def inference_file(inference_dir: Path, cc: str, model: str) -> Path:
    name = MODEL_FILES.get(model)
    if name is None:
        raise KeyError(f"no published inference file for model {model!r}")
    return Path(inference_dir) / cc / f"inference_{name}.jsonl"


def countries_with_gold(gold_dir: Path) -> list[str]:
    return sorted(p.parent.name for p in Path(gold_dir).glob("*/goldenset_*.jsonl"))


def iter_gold_rows(gold_dir: Path, cc: str) -> list[dict]:
    """Raw records of one published goldenset file, in file order."""
    path = gold_file(gold_dir, cc)
    # split("\n"), not splitlines(): some full_text values contain U+0085,
    # which splitlines() treats as a line break, splitting records in two.
    return [json.loads(line) for line in path.read_text(encoding="utf-8").split("\n") if line.strip()]


def load_gold_labels(gold_dir: Path, cc: str) -> tuple[list[str], dict[str, dict[str, str]]]:
    """Return ``(label_columns, {case_id: {field: normalised value}})``.

    The first row per ``case_id`` is the primary gold annotation; reannotation
    rows appended later in the file are ignored here (use
    ``load_annotator_labels`` for those). Same return shape and normalisation
    as ``legex.evaluation.scoring._read_goldenset_rows``.
    """
    by_id: dict[str, dict[str, str]] = {}
    for rec in iter_gold_rows(gold_dir, cc):
        case_id = normalise(rec.get("case_id"))
        if not case_id or case_id in by_id:
            continue
        by_id[case_id] = {f: normalise(rec.get(f)) for f in LABEL_FIELDS}
    return list(LABEL_FIELDS), by_id


def load_annotator_labels(
    gold_dir: Path, countries: list[str]
) -> dict[tuple[str, str, str], dict[str, str]]:
    """IAA label map ``{(annotator, cc, norm_case_id): {field: value}}``.

    The first row per ``case_id`` carries the role label ``primary`` (matching
    the XLSX mode of ``legex.analysis.iaa``); reannotation rows keep their
    salted ``annotator_id``. Reannotation rows with no label at all are
    dropped, mirroring the XLSX loader.
    """
    labels: dict[tuple[str, str, str], dict[str, str]] = {}
    for cc in countries:
        path = gold_file(gold_dir, cc)
        if not path.exists():
            log.warning("[%s] no published goldenset at %s", cc, path)
            continue
        seen: set[str] = set()
        for rec in iter_gold_rows(gold_dir, cc):
            case_id = normalise(rec.get("case_id"))
            if not case_id:
                continue
            fields = {f: normalise(rec.get(f)) for f in LABEL_FIELDS}
            key = norm_case_id(case_id)
            if case_id not in seen:
                seen.add(case_id)
                labels[(PRIMARY, cc, key)] = fields
            elif any(fields.values()):
                labels[(str(rec.get("annotator_id")), cc, key)] = fields
    return labels