from md2gost.latex.log import (
    STRICT_KINDS,
    Diagnostic,
    format_diagnostics,
    parse_log,
)

ERROR_LOG = """
This is XeTeX
! LaTeX Error: File `emblem' not found.
See the LaTeX manual or LaTeX Companion for explanation.
"""

OVERFULL_LOG = r"""
Overfull \hbox (56.70982pt too wide) in alignment at lines 220--220
 []
Overfull \hbox (7.2pt too wide) detected at line 14
 []
Overfull \hbox (0.4pt too wide) in paragraph at lines 30--31
"""

UNDERFULL_LOG = r"""
Underfull \hbox (badness 3000) in paragraph at lines 10--11
Underfull \hbox (badness 7000) in paragraph at lines 20--21
"""

WARNING_LOG = """
LaTeX Warning: Reference `fig:1' on page 3 undefined on input line 42.
LaTeX Warning: There were undefined references.
"""


def test_error_is_parsed() -> None:
    diags = parse_log(ERROR_LOG)
    assert len(diags) == 1
    assert diags[0].kind == "error"
    assert "File `emblem' not found" in diags[0].message


def test_overfull_amount_and_line() -> None:
    diags = [d for d in parse_log(OVERFULL_LOG) if d.kind == "overfull"]
    assert [d.amount for d in diags] == [56.70982, 7.2]
    assert [d.line for d in diags] == [220, 14]


def test_overfull_below_threshold_is_dropped() -> None:
    """Вылеты в доли пункта не видны глазом и только зашумляют вывод."""
    diags = parse_log(OVERFULL_LOG, overfull_threshold_pt=1.0)
    assert all(d.amount != 0.4 for d in diags if d.amount is not None)


def test_underfull_threshold() -> None:
    diags = [d for d in parse_log(UNDERFULL_LOG, underfull_threshold=5000)]
    assert len(diags) == 1
    assert diags[0].kind == "underfull"
    assert diags[0].amount == 7000
    assert diags[0].line == 20


def test_warning_is_parsed() -> None:
    diags = parse_log(WARNING_LOG)
    assert [d.kind for d in diags] == ["warning", "warning"]
    assert "undefined" in diags[0].message


def test_clean_log_gives_nothing() -> None:
    assert parse_log("This is XeTeX\nOutput written on a.pdf (3 pages).\n") == []


def test_format_sorts_overfull_by_amount() -> None:
    text = format_diagnostics(parse_log(OVERFULL_LOG))
    first = text.index("56.7")
    second = text.index("7.2")
    assert first < second


def test_format_is_empty_for_no_diagnostics() -> None:
    assert format_diagnostics([]) == ""


def test_format_mentions_every_kind() -> None:
    diags = parse_log(ERROR_LOG + OVERFULL_LOG + UNDERFULL_LOG + WARNING_LOG)
    text = format_diagnostics(diags)
    for word in ("ошибк", "предупрежд", "за правое поле", "разрежен"):
        assert word in text


def test_diagnostic_is_hashable() -> None:
    assert Diagnostic("error", "x", None, None) == Diagnostic("error", "x", None, None)


NOISE_LOG = r"""
Package unicode-math Warning: Using \overbracket and \underbracket from
(unicode-math)                `mathtools' package.

LaTeX Warning: There were undefined references.
"""


def test_known_package_noise_is_suppressed() -> None:
    """Постоянный шум unicode-math заглушает собой полезные предупреждения."""
    diags = parse_log(NOISE_LOG)
    assert len(diags) == 1
    assert "undefined references" in diags[0].message


def test_strict_ignores_underfull_and_warnings() -> None:
    """Разреженная строка бывает намеренной, выход за поле — никогда."""
    assert "overfull" in STRICT_KINDS
    assert "error" in STRICT_KINDS
    assert "underfull" not in STRICT_KINDS
    assert "warning" not in STRICT_KINDS