"""Строки таблицы OCR (§11.1 п. 3–5): шапка настоящая/повторная/синтетическая, классы строк, тип по кодам."""

import json
from pathlib import Path

import pytest

from src.normalizer.ocr.layout import ColumnLayout, cell_text, cells_by_index
from src.normalizer.ocr.rows import (
    ParsedTable,
    RowKind,
    classify_row,
    parse_table_rows,
    table_type_by_codes,
    table_type_by_unanimous_codes,
)

API_DIR = Path(__file__).resolve().parents[3]
REAL_FIXTURES = API_DIR.parent.parent / "fixtures" / "ocr"
KNOWN = frozenset({"1105", "1110", "1120", "1130", "1150", "1600", "2110", "2120", "2100"})


def _row(index: int, *cells: tuple[int, str, float]) -> dict:
    return {"row_index": index, "cells": [{"column_index": i, "value": v, "confidence": c} for i, v, c in cells]}


HEADER = _row(
    0,
    (0, "Наименование показателя", 100),
    (1, "Код", 100),
    (2, "На 30 июня\n2025 г", 100),
    (4, "На 31 декабря\n2024 г.", 100),
)


def _real_table(name: str, index: int) -> list[dict]:
    if not REAL_FIXTURES.is_dir():
        pytest.skip("fixtures недоступен: положите репозиторий fixtures рядом с workspace")
    data = json.loads((REAL_FIXTURES / name).read_text(encoding="utf-8"))
    return list(data["data_ocr"]["table_structure"][index]["rows"])


class TestClassifyRow:
    layout = ColumnLayout(label_idx=0, code_idx=1, value_idxs=(2,))

    @pytest.mark.parametrize(
        ("label", "code", "expected"),
        [
            ("Выручка", "2110", RowKind.ROW),
            ("Итого по разделу I", "1100", RowKind.TOTAL),
            ("Баланс", "1600", RowKind.BALANCE),
            ("Наименование", "Код", RowKind.HEADER),
            ("в том числе:", "", None),
        ],
    )
    def test_kinds(self, label: str, code: str, expected: RowKind | None) -> None:
        cells = cells_by_index(_row(1, (0, label, 100), (1, code, 100), (2, "1", 100)))
        assert classify_row(cells, self.layout) is expected


class TestParseTableRows:
    def test_header_then_rows(self) -> None:
        rows = [
            HEADER,
            _row(1, (0, "Выручка", 100), (1, "2110", 100), (2, "13 070", 100), (4, "", 100)),
            _row(2, (0, "в том числе:", 93), (1, "", 100), (2, "13 070", 100), (4, "", 100)),
        ]
        parsed = parse_table_rows(rows, KNOWN)
        assert isinstance(parsed, ParsedTable) and not parsed.synthetic_header
        assert [r.kind for r in parsed.rows] == [RowKind.HEADER, RowKind.ROW]
        assert parsed.rows[0].layout == ColumnLayout(label_idx=0, code_idx=1, value_idxs=(2, 4))
        assert parsed.rows[1].ordinal == 1

    def test_second_header_overrides_layout(self) -> None:
        """Review Focus 1: после повторной шапки с другим набором колонок строки идут по новой раскладке."""
        rows = [
            HEADER,
            _row(1, (0, "Выручка", 100), (1, "2110", 100), (2, "1", 100), (4, "2", 100)),
            _row(2, (0, "Наименование показателя", 100), (1, "Код", 100), (3, "За 2024 г.", 100)),
            _row(3, (0, "Себестоимость", 100), (1, "2120", 100), (3, "(5)", 100)),
        ]
        parsed = parse_table_rows(rows, KNOWN)
        assert parsed is not None
        kinds = [r.kind for r in parsed.rows]
        assert kinds == [RowKind.HEADER, RowKind.ROW, RowKind.ROW]  # повторная шапка не становится строкой
        assert parsed.rows[1].layout.value_idxs == (2, 4)
        assert parsed.rows[2].layout.value_idxs == (3,)

    def test_rows_before_header_use_inferred_layout(self) -> None:
        rows = [
            _row(0, (1, "1110", 100), (0, "Нематериальные активы", 100), (2, "5", 100)),
            _row(1, (0, "Наименование показателя", 100), (1, "Код", 100), (2, "2024", 100)),
            _row(2, (0, "Основные средства", 100), (1, "1150", 100), (2, "7", 100)),
        ]
        parsed = parse_table_rows(rows, KNOWN)
        assert parsed is not None and not parsed.synthetic_header
        assert [r.ordinal for r in parsed.rows] == [-1, 0, 2]  # шапка встаёт раньше первой строки данных
        assert parsed.rows[0].kind is RowKind.HEADER

    def test_synthetic_header_when_none(self) -> None:
        rows = [
            _row(0, (1, "1110", 100), (0, "Нематериальные активы", 100), (2, "5", 100)),
            _row(1, (1, "1150", 100), (0, "Основные средства", 100), (2, "7", 100)),
        ]
        parsed = parse_table_rows(rows, KNOWN)
        assert parsed is not None and parsed.synthetic_header
        header = parsed.rows[0]
        assert header.kind is RowKind.HEADER and header.ordinal == -1
        assert header.cells[1].value == "Код" and header.cells[0].value == "Наименование показателя"
        assert header.layout.value_idxs == (2,) and header.cells.get(2) is None  # тексты периодов пустые

    def test_no_header_no_codes_is_none(self) -> None:
        assert parse_table_rows([_row(0, (0, "текст", 100), (1, "мусор", 100))], KNOWN) is None
        assert parse_table_rows([], KNOWN) is None

    @pytest.mark.fixtures
    def test_aep3_balance_without_header(self) -> None:
        parsed = parse_table_rows(_real_table("aep_3.json", 0), KNOWN)
        assert parsed is not None and parsed.synthetic_header
        assert parsed.rows[0].layout.code_idx == 1
        assert any(r.cells[1].value.strip() == "1120" for r in parsed.rows[1:])

    @pytest.mark.fixtures
    def test_aep6_balance_with_header(self) -> None:
        parsed = parse_table_rows(_real_table("aep_6.json", 0), KNOWN)
        assert parsed is not None and not parsed.synthetic_header
        assert parsed.rows[0].layout == ColumnLayout(label_idx=0, code_idx=1, value_idxs=(2, 4, 5))
        assert table_type_by_codes(parsed) == "BALANCE"


class TestSkippedRows:
    """Решение №29: отброшенные строки считаются, не меняя сам разбор (строки данных те же, что и раньше)."""

    def test_clean_table_counts_nothing(self) -> None:
        rows = [HEADER, _row(1, (0, "Выручка", 100), (1, "2110", 100), (2, "5", 100), (4, "6", 100))]
        parsed = parse_table_rows(rows, KNOWN)
        assert parsed is not None
        assert (parsed.skipped_non_numeric_code, parsed.skipped_no_code_with_amounts) == (0, 0)

    def test_non_numeric_code_is_counted(self) -> None:
        rows = [
            HEADER,
            _row(1, (0, "ОС", 100), (1, "1150 :", 100), (2, "5", 100), (4, "6", 100)),
            _row(2, (0, "НМА", 100), (1, "1l10", 100), (2, "5", 100), (4, "6", 100)),  # латинская l вместо единицы
            _row(3, (0, "Выручка", 100), (1, "2110", 100), (2, "5", 100), (4, "6", 100)),
        ]
        parsed = parse_table_rows(rows, KNOWN)
        assert parsed is not None
        assert [r.ordinal for r in parsed.rows] == [0, 3]  # разбор прежний: строки с кодом-мусором отброшены
        assert (parsed.skipped_non_numeric_code, parsed.skipped_no_code_with_amounts) == (2, 0)

    def test_empty_code_counted_only_with_amount_in_value_columns(self) -> None:
        rows = [
            HEADER,
            _row(1, (0, "БАЛАНС", 100), (1, "", 100), (2, "5 553 383", 100), (4, "", 100)),  # сумма — считается
            _row(2, (0, "Итого", 100), (4, "(77)", 100)),  # ячейки кода нет вовсе, сумма в колонке 4 — считается
            _row(3, (0, "в том числе:", 93), (1, "", 100), (2, "", 100), (4, "-", 100)),  # прочерки — не сумма
            _row(4, (0, "Раздел I", 100), (1, "", 100), (2, "текст", 100)),  # текст — не сумма
            _row(5, (0, "Справочно", 100), (1, "", 100), (3, "9", 100)),  # сумма вне колонок значений — не считается
            _row(6, (0, "Выручка", 100), (1, "2110", 100), (2, "1", 100)),
        ]
        parsed = parse_table_rows(rows, KNOWN)
        assert parsed is not None and [r.ordinal for r in parsed.rows] == [0, 6]
        assert (parsed.skipped_non_numeric_code, parsed.skipped_no_code_with_amounts) == (0, 2)

    def test_repeated_header_is_not_counted_and_later_rows_use_new_layout(self) -> None:
        rows = [
            HEADER,
            _row(1, (0, "Выручка", 100), (1, "2110", 100), (2, "1", 100)),
            _row(2, (0, "Наименование показателя", 100), (1, "Код", 100), (3, "За 2024 г.", 100)),
            _row(3, (0, "Мусор", 100), (1, "21x0", 100), (3, "7", 100)),
            _row(4, (0, "БАЛАНС", 100), (1, "", 100), (3, "8", 100)),  # сумма в колонке новой раскладки (3)
            _row(5, (0, "Прочее", 100), (1, "", 100), (2, "8", 100)),  # колонка 2 в новой раскладке — не значение
        ]
        parsed = parse_table_rows(rows, KNOWN)
        assert parsed is not None and [r.ordinal for r in parsed.rows] == [0, 1]
        assert (parsed.skipped_non_numeric_code, parsed.skipped_no_code_with_amounts) == (1, 1)

    def test_leading_rows_before_header_are_counted(self) -> None:
        rows = [
            _row(0, (1, "1110", 100), (0, "Нематериальные активы", 100), (2, "5", 100)),
            _row(1, (1, "11x0", 100), (0, "Мусор", 100), (2, "5", 100)),
            _row(2, (1, "", 100), (0, "БАЛАНС", 100), (2, "9", 100)),
            _row(3, (1, "", 100), (0, "в том числе:", 100), (2, "", 100)),
            _row(4, (0, "Наименование показателя", 100), (1, "Код", 100), (2, "2024", 100)),
            _row(5, (0, "Основные средства", 100), (1, "1150", 100), (2, "7", 100)),
        ]
        parsed = parse_table_rows(rows, KNOWN)
        assert parsed is not None and not parsed.synthetic_header
        assert [r.ordinal for r in parsed.rows] == [-1, 0, 5]  # строка шапки — не в счёте
        assert (parsed.skipped_non_numeric_code, parsed.skipped_no_code_with_amounts) == (1, 1)

    def test_synthetic_header_table_counts_leading_rows(self) -> None:
        rows = [
            _row(0, (1, "1110", 100), (0, "Нематериальные активы", 100), (2, "5", 100)),
            _row(1, (1, "1150 :", 100), (0, "ОС", 100), (2, "5", 100)),
            _row(2, (1, "", 100), (0, "БАЛАНС", 100), (2, "9", 100)),
        ]
        parsed = parse_table_rows(rows, KNOWN)
        assert parsed is not None and parsed.synthetic_header
        assert (parsed.skipped_non_numeric_code, parsed.skipped_no_code_with_amounts) == (1, 1)

    @pytest.mark.fixtures
    @pytest.mark.parametrize(
        ("name", "index", "non_numeric", "no_code_amounts"),
        [("aep_3.json", 0, 8, 2), ("aep_3.json", 1, 2, 2), ("aep_6.json", 0, 2, 19), ("aep_6.json", 1, 1, 2)],
    )
    def test_real_tables(self, name: str, index: int, non_numeric: int, no_code_amounts: int) -> None:
        """aep_3: «БАЛАНС» и «Выручка» с ПУСТЫМ кодом и суммами теряются; aep_6: «в том числе:» с суммами (OQ-141)."""
        parsed = parse_table_rows(_real_table(name, index), KNOWN)
        assert parsed is not None
        assert (parsed.skipped_non_numeric_code, parsed.skipped_no_code_with_amounts) == (non_numeric, no_code_amounts)


class TestMergedCodeRows:
    """OQ-156 (§11.1 п. 4): ИС склеила соседние строки формы — код `1500\\n1700`, суммы через перевод строки."""

    MERGED = _row(
        7,
        (0, "Итого по разделу V\n\nБАЛАНС", 97),
        (1, "1500\n1700", 99),
        (2, "917 775\n2 371 333", 100),
        (4, "783 941\n2 096 754", 90),
    )

    @staticmethod
    def _data(parsed: ParsedTable | None) -> list[tuple[str, str, str, str]]:
        assert parsed is not None
        return [
            (cell_text(r.cells, 0), cell_text(r.cells, 1), cell_text(r.cells, 2), cell_text(r.cells, 4))
            for r in parsed.rows
            if r.kind is not RowKind.HEADER
        ]

    def test_split_into_rows_by_parts(self) -> None:
        parsed = parse_table_rows([HEADER, self.MERGED], KNOWN)
        assert self._data(parsed) == [
            ("Итого по разделу V", "1500", "917 775", "783 941"),
            ("БАЛАНС", "1700", "2 371 333", "2 096 754"),
        ]
        assert parsed is not None
        assert [r.ordinal for r in parsed.rows[1:]] == [7, 7]
        assert parsed.rows[1].kind is RowKind.TOTAL
        assert (parsed.rows[2].cells[1].confidence, parsed.rows[2].cells[4].confidence) == (99, 90)
        assert (parsed.split_merged_codes, parsed.skipped_non_numeric_code) == (1, 0)

    def test_blank_value_cell_stays_blank_in_every_part(self) -> None:
        row = _row(1, (0, "А\nБ", 100), (1, "1150\n1160", 100), (2, "5\n6", 100), (4, "", 100))
        assert self._data(parse_table_rows([HEADER, row], KNOWN)) == [("А", "1150", "5", ""), ("Б", "1160", "6", "")]

    def test_label_parts_mismatch_keeps_whole_label(self) -> None:
        row = _row(1, (0, "Итого", 100), (1, "1150\n1160", 100), (2, "5\n6", 100))
        assert [d[0] for d in self._data(parse_table_rows([HEADER, row], KNOWN))] == ["Итого", "Итого"]

    @pytest.mark.parametrize(
        "row",
        [
            _row(1, (0, "А\nБ", 100), (1, "1150\n1160", 100), (2, "5", 100)),  # одна сумма на два кода
            _row(1, (0, "А\nБ", 100), (1, "1150\n116O", 100), (2, "5\n6", 100)),  # вторая часть — не целое
            _row(1, (0, "А\nБ", 100), (1, "1150\n1160", 100), (2, "5\n6", 100), (4, "1\n2\n3", 100)),  # 3 части
        ],
    )
    def test_parts_mismatch_is_skipped_as_before(self, row: dict) -> None:
        parsed = parse_table_rows([HEADER, row], KNOWN)
        assert self._data(parsed) == []
        assert parsed is not None and (parsed.split_merged_codes, parsed.skipped_non_numeric_code) == (0, 1)

    def test_rows_before_header_are_split_too(self) -> None:
        rows = [
            _row(0, (1, "1110", 100), (0, "НМА", 100), (2, "5", 100)),
            _row(1, (1, "1150\n1160", 100), (0, "ОС\nДоходные вложения", 100), (2, "7\n8", 100)),
        ]
        parsed = parse_table_rows(rows, KNOWN)
        assert parsed is not None and parsed.synthetic_header
        assert [r.cells[1].value for r in parsed.rows[1:]] == ["1110", "1150", "1160"]
        assert parsed.split_merged_codes == 1

    @pytest.mark.fixtures
    @pytest.mark.parametrize("name", ["Бухгалтерская  отчетность 1 кв.25.json", "БО 1 кв 2025.json"])
    def test_real_balance_keeps_1500_and_1700(self, name: str) -> None:
        parsed = parse_table_rows(_real_table(name, 0), KNOWN)
        assert parsed is not None
        codes = [r.cells[r.layout.code_idx].value for r in parsed.rows if r.kind is not RowKind.HEADER]
        assert "1500" in codes and "1700" in codes
        assert parsed.split_merged_codes == 1


class TestTableType:
    def test_by_first_digit(self) -> None:
        rows = [
            HEADER,
            _row(1, (0, "Выручка", 100), (1, "2110", 100), (2, "1", 100)),
            _row(2, (0, "Себестоимость", 100), (1, "2120", 100), (2, "1", 100)),
            _row(3, (0, "ОС", 100), (1, "1150", 100), (2, "1", 100)),
        ]
        assert table_type_by_codes(parse_table_rows(rows, KNOWN)) == "INCOME"

    def test_tie_or_empty_is_none(self) -> None:
        rows = [
            HEADER,
            _row(1, (0, "a", 100), (1, "2110", 100), (2, "1", 100)),
            _row(2, (0, "b", 100), (1, "1150", 100), (2, "1", 100)),
        ]
        assert table_type_by_codes(parse_table_rows(rows, KNOWN)) is None
        assert table_type_by_codes(ParsedTable(rows=[], synthetic_header=False)) is None

    def test_unanimous_requires_single_group(self) -> None:
        """#30: тип «по единодушным кодам» — только когда все коды данных одной группы."""
        income_only = [
            HEADER,
            _row(1, (0, "Выручка", 100), (1, "2110", 100), (2, "1", 100)),
            _row(2, (0, "Себестоимость", 100), (1, "2120", 100), (2, "1", 100)),
        ]
        assert table_type_by_unanimous_codes(parse_table_rows(income_only, KNOWN)) == "INCOME"
        mixed = [*income_only, _row(3, (0, "ОС", 100), (1, "1150", 100), (2, "1", 100))]
        assert table_type_by_unanimous_codes(parse_table_rows(mixed, KNOWN)) is None
        assert table_type_by_unanimous_codes(ParsedTable(rows=[], synthetic_header=False)) is None