"""Отображаемое значение числа по числовому формату ячейки (#42, R-2…R-6): примеры из реальных выгрузок 1С."""

from decimal import Decimal

import pytest

from src.parser.statements.number_format import FormatResult, display_amount


def shown(raw: str, fmt: str) -> tuple[str, Decimal | None]:
    result = display_amount(Decimal(raw), fmt)
    return result.kind, result.value


@pytest.mark.parametrize(
    ("raw", "fmt", "expected"),
    [
        ("10741981390", "#,##0,", "10741981.00"),
        ("586260.26", "0,", "586.00"),
        ("898852.21795", "#,##0", "898852.00"),
        ("898852.5", "#,##0", "898853.00"),
        ("1234.5", "#,##0.00", "1234.50"),
        ("1234.567", "#,##0.00", "1234.57"),
        ("1500", "#,##0,", "2.00"),
        ("-1500", "#,##0,", "-2.00"),
        ("1499.99", "#,##0,", "1.00"),
        ("-1499.99", "#,##0,", "-1.00"),
        ("586260.26", "0.00,", "586.26"),
        ("5000000", "#,##0,,", "5.00"),
        ("1500", '#,##0,;(#,##0,);"-"', "2.00"),
        ("-1500", '#,##0,;(#,##0,);"-"', "-2.00"),
        ("1500", "#,##0;(#,##0)", "1500.00"),
        ("-1500", "#,##0;(#,##0)", "-1500.00"),
        ("-1500", "#,##0;#,##0", "-1500.00"),
        ("1500", "[Red]#,##0", "1500.00"),
        ("1500", "[$-419]#,##0", "1500.00"),
        ("1500", "#,##0_);[Red](#,##0)", "1500.00"),
        ("-1500", "#,##0_);[Red](#,##0)", "-1500.00"),
        ("1500.126", "0.000", "1500.13"),
        ("1500", '0 "тыс."', "1500.00"),
        ("-872206880.07", '[=-872206880.07]"(872 207)";#,##0,', "-872207.00"),
        ("-872206881", '[=-872206880.07]"(872 207)";#,##0,', "-872207.00"),
        ("-646532", '[=-646532]"(647)"', "-647.00"),
        ("12345678", '[=-872206880.07]"(872 207)";#,##0,', "12346.00"),
        ("1500499.9999999998", "#,##0,", "1501.00"),
        ("1500", "[$-419]#,##0,", "2.00"),
        ("1500", "\\(#,##0\\)", "1500.00"),
        ("5", "[=5]0;[=5]0,", "5.00"),
        ("-1500", "[$-419]#,##0,", "-2.00"),
    ],
)
def test_value(raw: str, fmt: str, expected: str) -> None:
    kind, value = shown(raw, fmt)
    assert kind == "value"
    assert value is not None
    assert str(value) == expected


@pytest.mark.parametrize(
    ("raw", "fmt"),
    [
        ("0", '[=0]"-"'),
        ("0", '[=0]""'),
        ("0", '[=0]"-";General'),
        ("-0.79", '[=-0.79]"-"'),
        ("0", '#,##0,;(#,##0,);"-"'),
        ("0", ";;;"),
        ("7", ";;;"),
    ],
)
def test_no_value(raw: str, fmt: str) -> None:
    assert shown(raw, fmt) == ("value", None)


@pytest.mark.parametrize(
    ("raw", "fmt"),
    [
        ("5", '[=0]"-"'),
        ("5", "0%"),
        ("5", "0.00E+00"),
        ("5", "# ?/?"),
        ("5", "@"),
        ("5", "dd.mm.yyyy"),
        ("5", "h:mm AM/PM"),
        ("0", '[=0]"н/д"'),
        ("5", '"н/д"'),
        ("5", "0 руб"),
        ("5", "[=1E-5]0"),
        ("5", "[=1,5]0"),
        ("5", "0 ₽"),
        ("5", "0;0;0;@;0"),
    ],
)
def test_unparsed(raw: str, fmt: str) -> None:
    assert shown(raw, fmt) == ("unparsed", None)


@pytest.mark.parametrize("fmt", ["General", "general", "", "  "])
def test_raw(fmt: str) -> None:
    assert shown("5.5", fmt) == ("raw", None)


def test_general_section_after_condition() -> None:
    assert shown("5.5", '[=0]"-";General') == ("raw", None)


@pytest.mark.parametrize(
    ("raw", "fmt", "expected"),
    [
        ("5", "[<10]0;[>=10]0,", "5.00"),
        ("20000", "[<10]0;[>=10]0,", "20.00"),
        ("5", "[<>5]0;0.0", "5.0"),
    ],
)
def test_comparison_conditions(raw: str, fmt: str, expected: str) -> None:
    kind, value = shown(raw, fmt)
    assert kind == "value"
    assert value is not None
    assert Decimal(expected) == value


def test_fourth_section_ignored() -> None:
    assert shown("1500", "#,##0,;(#,##0,);0;@") == ("value", Decimal("2.00"))


def test_semicolon_in_quotes_does_not_split() -> None:
    assert shown("0", '[=0]"a;b"') == ("unparsed", None)


def test_escaped_char_is_decoration() -> None:
    assert shown("1500", "#,##0\\ \\р") == ("value", Decimal("1500.00"))


def test_huge_value_out_of_range_is_unparsed() -> None:
    assert shown("1" + "0" * 40, "#,##0") == ("unparsed", None)


def test_max_numeric_18_2_range() -> None:
    """Excel показывает 15 значащих цифр: 16-значное целое округляется до 1E+16, что уже вне numeric(18,2)."""
    assert shown("999999999999999", "0") == ("value", Decimal("999999999999999.00"))
    assert shown("9999999999999999", "0") == ("unparsed", None)
    assert shown("99999999999999999", "0") == ("unparsed", None)


def test_scaled_huge_value_fits() -> None:
    assert shown("99999999999999999000", "0,") == ("unparsed", None)
    assert shown("999999999999999000", "0,") == ("value", Decimal("999999999999999.00"))


def test_condition_compares_with_excel_15_digit_precision() -> None:
    """Из xls значение приходит как -1486533582.3500001, условие записано `-1486533582.35`: Excel считает их равными."""
    fmt = '[=-1486533582.35]"(1\u00a0486\u00a0534)"'

    result = display_amount(Decimal("-1486533582.3500001"), fmt)

    assert result == FormatResult("value", Decimal("-1486534"))


def test_value_is_rounded_to_15_digits_half_up_before_scaling() -> None:
    """Артефакт float 1500499.9999999998 в Excel — 1500500, после деления на 1000 половина округляется вверх."""
    assert shown("1500499.9999999998", "#,##0,") == ("value", Decimal("1501"))


def test_condition_operand_is_rounded_to_15_digits() -> None:
    """Литерал «-» — «нет значения»; «x» дал бы unparsed по R-5 независимо от условия, поэтому берём прочерк."""
    result = display_amount(Decimal("0.1234567890123456"), '[=0.1234567890123456]"-"')

    assert result == FormatResult("value", None)


def test_condition_that_does_not_match_the_pattern_is_unparsed() -> None:
    assert shown("0", '[=1E-5]"x"') == ("unparsed", None)