"""Контрольные суммы §1.4 (spec «Контрольные суммы определяют статус», `05-domain-rules.md` §1.4, R-13, R-20).

Строки собираются напрямую (`ClassifiedRow` над `BodyRow`): проверки — чистые функции над деревом строк, им не нужна
книга. Номера строк произвольные; суммы — `Decimal` или `None` (пусто = 0).
"""

from decimal import Decimal

from src.contract.common import DataType
from src.parser.checks import TOLERANCE, balance_identity, parent_sums, run_checks, total_matches_root
from src.parser.classify import ClassifiedRow, RowGroupType
from src.parser.hierarchy import BodyRow

Sums = tuple[str | None, str | None, str | None, str | None, str | None, str | None]
EMPTY: Sums = (None, None, None, None, None, None)


def row(  # noqa: PLR0913 - строка теста описывается полностью одним вызовом
    number: int,
    sums: Sums,
    *,
    level: int = 0,
    parent: int | None = None,
    group_type: RowGroupType = "COUNTERPARTY",
    data_type: DataType | None = "BU",
    text: str = "строка",
) -> ClassifiedRow:
    body = BodyRow(
        row=number,
        text=text,
        is_account=group_type == "ACCOUNT",
        account_rank=1 if group_type == "ACCOUNT" else None,
        bold=False,
        indent=0,
        outline=level,
        sums=tuple(None if value is None else Decimal(value) for value in sums),
    )
    return ClassifiedRow(
        body=body,
        level=level,
        parent=parent,
        group_type=group_type,
        group_name=None,
        account_code_raw="60",
        counterparty_name=None,
        counterparty_inn=None,
        data_type=data_type,
        extra=None,
    )


def account(number: int, sums: Sums) -> ClassifiedRow:
    return row(number, sums, group_type="ACCOUNT", text="60")


def total(number: int, sums: Sums) -> ClassifiedRow:
    return row(number, sums, group_type="TOTAL", text="Итого")


# Корень 60 с двумя контрагентами, «Итого» равно корню; тождество выполняется во всех строках
ROOT: Sums = ("100", None, "50", "30", "120", None)
CHILD_A: Sums = ("60", None, "20", "10", "70", None)
CHILD_B: Sums = ("40", None, "30", "20", "50", None)


def tree() -> list[ClassifiedRow]:
    return [
        account(7, ROOT),
        row(8, CHILD_A, level=1, parent=7),
        row(9, CHILD_B, level=1, parent=7),
        total(10, ROOT),
    ]


def test_tolerance_is_one_kopeck() -> None:
    assert Decimal("0.01") == TOLERANCE


def test_consistent_tree_has_no_violations() -> None:
    checks, warnings = run_checks(tree())

    assert checks.total_row_matches_root is True
    assert checks.balance_identity_violations == []
    assert checks.parent_sum_violations == []
    assert warnings == []


def test_balance_identity_treats_null_as_zero() -> None:
    rows = [
        row(1, (None, None, None, None, None, None)),
        row(2, (None, "5", None, None, None, "5")),  # только кредит: −5 = −5
        row(3, ("10", None, None, "10", None, None)),  # 10 − 10 = 0 при пустом конце
    ]

    assert balance_identity(rows) == []


def test_balance_identity_reports_row_numbers_beyond_tolerance() -> None:
    rows = [
        row(1, ("100", None, "50", "30", "120.01", None)),  # в пределах ±0.01
        row(2, ("100", None, "50", "30", "121", None)),  # конец увеличен на 1
        row(3, (None, None, None, None, None, "0.02")),
    ]

    assert balance_identity(rows) == [2, 3]


def test_parent_differs_from_sum_of_children() -> None:
    rows = tree()
    rows[2] = row(9, ("40", None, "30", "20", "51", None), level=1, parent=7)

    assert parent_sums(rows) == [7]


def test_parent_sum_is_checked_per_column_with_tolerance() -> None:
    rows = [
        account(7, ("100", None, "50", "30", "120", None)),
        row(8, ("99.995", None, "50", "30", "119.995", None), level=1, parent=7),
    ]

    assert parent_sums(rows) == []


def test_collapsed_parent_balance_is_compared_by_net() -> None:
    """Счёт со свёрнутым сальдо (одна сторона), субсчета — с развёрнутым: сверка сальдо по нетто (как в 1С на всех
    реальных файлах с субсчетами разных сторон); обороты — по колонкам.
    """
    rows = [
        account(12, ("16", None, "134", "111", "39", None)),
        row(13, ("40", None, "131", "111", "60", None), level=1, parent=12, group_type="ACCOUNT"),
        row(22, (None, "24", "3", None, None, "21"), level=1, parent=12, group_type="ACCOUNT"),
    ]

    assert parent_sums(rows) == []


def test_collapsed_parent_with_wrong_net_is_violation() -> None:
    rows = [
        account(12, ("17", None, "134", "111", "39", None)),
        row(13, ("40", None, "131", "111", "60", None), level=1, parent=12, group_type="ACCOUNT"),
        row(22, (None, "24", "3", None, None, "21"), level=1, parent=12, group_type="ACCOUNT"),
    ]

    assert parent_sums(rows) == [12]


def test_collapsed_parent_on_the_opposite_side_is_violation() -> None:
    """T9.1 (R-21): свёрнутое сальдо родителя на противоположной стороне (16 Кт при нетто детей +16 Дт) — нарушение:
    нетто сравнивается со знаком, совпадения модуля мало."""
    rows = [
        account(12, (None, "16", "134", "111", "39", None)),
        row(13, ("40", None, "131", "111", "60", None), level=1, parent=12, group_type="ACCOUNT"),
        row(22, (None, "24", "3", None, None, "21"), level=1, parent=12, group_type="ACCOUNT"),
    ]

    assert parent_sums(rows) == [12]


def test_zero_parent_with_children_netting_to_zero_is_accepted() -> None:
    """T9.1 (R-21, осознанное поведение): родитель (0, 0) при детях (X Дт, X Кт) — без нарушения: нулевое сальдо
    родителя — свёрнутое (не больше одной ненулевой стороны), нетто детей X − X = 0. Остаточный риск описан в спеке
    (§1.4): потерянная пара сальдо у родителя этой проверкой не ловится."""
    rows = [
        account(12, ("0", "0", "134", "111", "23", None)),
        row(13, ("50", None, "131", "111", "70", None), level=1, parent=12, group_type="ACCOUNT"),
        row(22, (None, "50", "3", None, None, "47"), level=1, parent=12, group_type="ACCOUNT"),
    ]

    assert balance_identity(rows) == []
    assert parent_sums(rows) == []


def test_expanded_parent_balance_must_match_by_columns() -> None:
    """Родитель с обеими сторонами сальдо — развёрнутое сальдо: совпадение одного нетто недостаточно."""
    rows = [
        account(12, ("41", "25", "134", "111", "60", "21")),
        row(13, ("40", None, "131", "111", "60", None), level=1, parent=12, group_type="ACCOUNT"),
        row(22, (None, "24", "3", None, None, "21"), level=1, parent=12, group_type="ACCOUNT"),
    ]

    assert parent_sums(rows) == [12]


def test_turnovers_are_compared_by_columns_even_when_net_matches() -> None:
    rows = [
        account(12, ("16", None, "135", "112", "39", None)),
        row(13, ("40", None, "131", "111", "60", None), level=1, parent=12, group_type="ACCOUNT"),
        row(22, (None, "24", "3", None, None, "21"), level=1, parent=12, group_type="ACCOUNT"),
    ]

    assert parent_sums(rows) == [12]


def test_currency_and_quantity_children_are_excluded() -> None:
    rows = [
        account(7, ROOT),
        row(8, ROOT, level=1, parent=7),
        row(9, ("1", None, "2", None, "3", None), level=2, parent=8, group_type="OTHER", data_type="CURRENCY"),
        row(10, ("7", None, None, None, "7", None), level=2, parent=8, group_type="OTHER", data_type="QUANTITY"),
        total(11, ROOT),
    ]

    assert parent_sums(rows) == []


def test_children_of_other_data_type_are_not_summed() -> None:
    """Σ детей «того же data_type»: ребёнок НУ под родителем БУ в сумму не входит."""
    rows = [
        account(7, ("10", None, None, None, "10", None)),
        row(8, ("10", None, None, None, "10", None), level=1, parent=7),
        row(9, ("5", None, None, None, "5", None), level=1, parent=7, data_type="NU"),
    ]

    assert parent_sums(rows) == []


def test_rows_without_children_are_not_parents() -> None:
    rows = [account(7, ROOT), account(8, ("1", None, None, None, "1", None))]

    assert parent_sums(rows) == []


def test_total_matches_first_root_account() -> None:
    rows = tree()

    assert total_matches_root(rows) is True
    rows[-1] = total(10, ("100", None, "50", "30", "121", None))
    assert total_matches_root(rows) is False


# Лист без строки корневого счёта (вариант 2, issue #11 п. 3, OQ-106/OQ-133): верхний уровень — субсчета 58.01, 58.03;
# «Итого» равно сумме строк уровня 0
SUB_A: Sums = ("100", None, "10", "0", "110", None)
SUB_B: Sums = ("40", None, "30", "20", "50", None)
SUB_SUM: Sums = ("140", None, "40", "20", "160", None)


def multi_root_tree(total_sums: Sums = SUB_SUM) -> list[ClassifiedRow]:
    return [
        account(7, SUB_A),
        row(8, SUB_A, level=1, parent=7),
        account(9, SUB_B),
        row(10, SUB_B, level=1, parent=9),
        total(11, total_sums),
    ]


def test_total_matches_sum_of_level_zero_rows_when_there_are_several_roots() -> None:
    rows = multi_root_tree()

    checks, warnings = run_checks(rows)

    assert total_matches_root(rows) is True
    assert checks.total_row_matches_root is True
    assert warnings == []


def test_collapsed_total_matches_sum_of_level_zero_rows_by_net_balance() -> None:
    """1С: «Итого» — свёрнутое сальдо (одна сторона), субсчета — развёрнутое; нетто сходится (R-21 для пары
    «Итого» ↔ Σ уровня 0); обороты сверяются по колонкам.
    """
    mixed_a: Sums = ("100", None, "10", "0", "110", None)
    mixed_b: Sums = (None, "30", "30", "20", None, "20")
    net_total: Sums = ("70", None, "40", "20", "90", None)
    rows = [
        account(7, mixed_a),
        account(8, mixed_b),
        total(9, net_total),
    ]

    assert total_matches_root(rows) is True
    rows[-1] = total(9, ("70", None, "41", "20", "90", None))
    assert total_matches_root(rows) is False


def test_expanded_balance_total_is_not_matched_by_net_when_total_has_both_sides() -> None:
    """Нетто допускается, только если сальдо «Итого» свёрнуто; «Итого» с обеими сторонами сверяется по колонкам."""
    mixed_a: Sums = ("100", None, "10", "0", "110", None)
    mixed_b: Sums = (None, "30", "30", "20", None, "20")
    both_sides: Sums = ("70", "1", "40", "20", "90", "1")
    rows = [account(7, mixed_a), account(8, mixed_b), total(9, both_sides)]

    assert total_matches_root(rows) is False


def test_total_that_equals_neither_first_root_nor_sum_of_roots_mismatches() -> None:
    rows = multi_root_tree(("140", None, "40", "20", "161", None))

    checks, warnings = run_checks(rows)

    assert checks.total_row_matches_root is False
    assert any("Итого" in warning and "11" in warning and "сумме 2 строк уровня 0" in warning for warning in warnings)


def test_sum_of_roots_ignores_indicator_rows_and_total_itself() -> None:
    rows = multi_root_tree()
    rows.insert(2, row(20, ("5", None, None, None, "5", None), group_type="OTHER", data_type="CURRENCY"))

    assert total_matches_root(rows) is True


def test_total_still_matches_single_root_even_if_other_level_zero_rows_exist() -> None:
    """Прежнее поведение сохраняется: «Итого» = первый корень достаточно, лишние строки уровня 0 статус не портят."""
    rows = tree()
    rows.insert(3, row(9, ("1", None, None, None, "1", None), group_type="OTHER"))

    assert total_matches_root(rows) is True


def test_second_total_row_does_not_replace_the_first_one() -> None:
    """Вторая итоговая строка («Итого развернутое») в сверку с корнем не входит: берётся первая TOTAL листа."""
    rows = [*tree(), total(11, ("1", None, None, None, "1", None))]

    assert total_matches_root(rows) is True


def test_empty_osv_without_root_matches_when_total_is_empty_or_zero() -> None:
    assert total_matches_root([total(8, EMPTY)]) is True
    assert total_matches_root([total(8, ("0", None, "0.00", None, None, "0"))]) is True
    assert total_matches_root([total(8, ("1", None, None, None, "1", None))]) is False


def test_missing_total_fails_root_check_with_warning() -> None:
    """R-20: без «Итого» сверку выполнить нельзя — `false` и предупреждение."""
    rows = tree()[:-1]

    checks, warnings = run_checks(rows)

    assert total_matches_root(rows) is False
    assert checks.total_row_matches_root is False
    assert "строка «Итого» не найдена" in warnings


def test_run_checks_warnings_name_row_numbers() -> None:
    rows = tree()
    rows[2] = row(9, ("40", None, "30", "20", "51", None), level=1, parent=7)

    checks, warnings = run_checks(rows)

    assert checks.balance_identity_violations == [9]
    assert checks.parent_sum_violations == [7]
    assert checks.total_row_matches_root is True
    assert any("строки 9" in warning for warning in warnings), warnings
    assert any("строки 7" in warning for warning in warnings), warnings


def test_run_checks_reports_total_mismatch_with_row_numbers() -> None:
    rows = tree()
    rows[-1] = total(10, ("100", None, "50", "30", "121", None))

    checks, warnings = run_checks(rows)

    assert checks.total_row_matches_root is False
    assert any("10" in warning and "7" in warning and "Итого" in warning for warning in warnings), warnings


def test_run_checks_warning_lists_are_capped() -> None:
    """Список нарушений в `checks` полный, текст предупреждения — первые номера и общее число."""
    broken: Sums = ("1", None, None, None, "2", None)
    rows = [row(number, broken) for number in range(1, 101)]

    checks, warnings = run_checks(rows)

    assert checks.balance_identity_violations == list(range(1, 101))
    (identity,) = [warning for warning in warnings if "сальдо" in warning]
    assert "всего 100" in identity
    assert "100," not in identity