"""Справочники нормализатора (spec «Справочники нормализации — данные с редакциями форм», D-7)."""

from datetime import date
from pathlib import Path

import pytest
import yaml

from src.core.config import get_settings
from src.normalizer.rules import Edition, OcrRules, load_rules

API_DIR = Path(__file__).resolve().parents[3]
RULES_DIR = API_DIR / "rules"


def _write_rules(tmp_path: Path, lines: dict | None = None) -> Path:
    (tmp_path / "statement_lines.yaml").write_text(
        yaml.safe_dump(
            lines
            or {
                "editions": [
                    {"id": "66n", "valid_until": "2024-12-31", "lines": {"1150": "Основные средства"}},
                    {"id": "fsbu4", "valid_from": "2025-01-01", "lines": {}},
                ]
            },
            allow_unicode=True,
        ),
        encoding="utf-8",
    )
    (tmp_path / "ocr_lookalikes.yaml").write_text(yaml.safe_dump({"digits": {"О": "0", "l": "1"}}), encoding="utf-8")
    (tmp_path / "statement_labels.yaml").write_text(
        yaml.safe_dump({"labels": {"бухгалтерский баланс": "BALANCE"}}, allow_unicode=True), encoding="utf-8"
    )
    return tmp_path


class TestRealRules:
    def test_loads_repository_rules(self) -> None:
        rules = load_rules(RULES_DIR)
        ids = [edition.id for edition in rules.editions]
        assert ids == ["66n", "fsbu4"]
        assert rules.editions[0].lines["1150"] == "Основные средства"
        assert rules.editions[0].lines["1120"] == "Результаты исследований и разработок"
        assert rules.lookalikes["О"] == "0"
        assert rules.labels["бухгалтерский баланс"] == "BALANCE"
        assert rules.labels["отчет о финансовых результатах"] == "INCOME"

    def test_codes_are_four_or_five_digits_without_duplicates(self) -> None:
        rules = load_rules(RULES_DIR)
        for edition in rules.editions:
            codes = list(edition.lines)
            assert all(code.isdigit() and 4 <= len(code) <= 5 for code in codes), edition.id
            assert len(codes) == len(set(codes)), edition.id
            assert all(name.strip() for name in edition.lines.values()), edition.id

    def test_fsbu4_edition_exists_even_if_empty(self) -> None:
        rules = load_rules(RULES_DIR)
        fsbu4 = next(edition for edition in rules.editions if edition.id == "fsbu4")
        assert fsbu4.valid_from == date(2025, 1, 1)

    def test_66n_edition_data_integrity(self) -> None:
        rules = load_rules(RULES_DIR)
        edition_66n = next(edition for edition in rules.editions if edition.id == "66n")
        # Проверка точного количества кодов в редакции 66n
        assert len(edition_66n.lines) == 63, f"66n должна содержать 63 кода, а содержит {len(edition_66n.lines)}"
        # Проверка специфических кодов, упомянутых в брифе (опечатка и нестандартные)
        assert edition_66n.lines["1220"] == "Налог на добавленную стоимость по приобретённым ценностям"
        assert edition_66n.lines["1105"] == "Гудвил"
        assert edition_66n.lines["2411"] == "в т.ч. текущий налог на прибыль"
        assert edition_66n.lines["2412"] == "отложенный налог на прибыль"


class TestEditionChoice:
    def test_by_report_date(self, tmp_path: Path) -> None:
        rules = load_rules(_write_rules(tmp_path))
        assert rules.edition_for(date(2024, 12, 31)).id == "66n"
        assert rules.edition_for(date(2025, 6, 30)).id == "fsbu4"
        assert rules.edition_for(None) is None

    def test_by_codes_prefers_more_hits(self, tmp_path: Path) -> None:
        rules = load_rules(
            _write_rules(
                tmp_path,
                {
                    "editions": [
                        {"id": "66n", "valid_until": "2024-12-31", "lines": {"1150": "ОС", "1110": "НМА"}},
                        {"id": "fsbu4", "valid_from": "2025-01-01", "lines": {"1150": "ОС", "1231": "ДЗ долгосрочная"}},
                    ]
                },
            )
        )
        assert rules.edition_by_codes(["1150", "1231"]).id == "fsbu4"
        assert rules.edition_by_codes(["1150"]).id == "66n"  # равенство — первая
        assert rules.edition_by_codes(["9999"]) is None

    def test_known_codes_and_editions_with(self, tmp_path: Path) -> None:
        rules = load_rules(_write_rules(tmp_path))
        assert rules.known_codes() == frozenset({"1150"})
        assert rules.editions_with("1150") == ["66n"]
        assert rules.editions_with("1110") == []


class TestValidation:
    def test_bad_code_fails_with_file_name(self, tmp_path: Path) -> None:
        _write_rules(tmp_path, {"editions": [{"id": "66n", "lines": {"11A0": "x"}}]})
        with pytest.raises(ValueError, match="statement_lines.yaml"):
            load_rules(tmp_path)

    def test_missing_file_fails(self, tmp_path: Path) -> None:
        _write_rules(tmp_path)
        (tmp_path / "ocr_lookalikes.yaml").unlink()
        with pytest.raises(ValueError, match="ocr_lookalikes.yaml"):
            load_rules(tmp_path)

    def test_lookalike_must_map_to_single_digit(self, tmp_path: Path) -> None:
        _write_rules(tmp_path)
        (tmp_path / "ocr_lookalikes.yaml").write_text(yaml.safe_dump({"digits": {"О": "00"}}), encoding="utf-8")
        with pytest.raises(ValueError, match="ocr_lookalikes.yaml"):
            load_rules(tmp_path)


def test_settings_defaults() -> None:
    settings = get_settings()
    assert settings.SCAN_CLEANUP is False
    assert settings.SCAN_RULES_DIR == "rules"
    assert isinstance(Edition, type) and isinstance(OcrRules, type)