"""The DTD check, and the mapping from libxml2's messages to spec sections.

One test per message shape, so the mapping table in mews.lint stays pinned to
what libxml2 actually says.
"""

import pytest

from mews.lint import validate_bytes

# fixture name -> (section, level, code)
CASES = {
    "script": ("4.1", "must", "dtd-element"),
    "div": ("4.1", "must", "dtd-element"),
    "sup": ("4.1", "must", "dtd-element"),
    "style-element": ("5", "must", "dtd-styling"),
    "style-attr": ("5", "must", "dtd-styling"),
    "class-on-p": ("4.1", "must", "dtd-attribute"),
    "img-width": ("4.1", "must", "dtd-attribute"),
    "img-no-alt": ("4.1", "must", "dtd-required-attribute"),
    "input-type-email": ("4.1", "must", "dtd-value"),
    "nested-table": ("4.2", "must", "dtd-nested-table"),
    "table-in-li": ("4.2", "must", "dtd-nested-table"),
    "bad-body-class": ("5.3", "must", "dtd-variant"),
    "empty-body": ("4.1", "must", "dtd-content"),
    "head-link-before-meta": ("3.3", "must", "dtd-head"),
    "link-bad-rel": ("3.3", "must", "link-rel"),
}


@pytest.mark.parametrize(("name", "expected"), CASES.items())
def test_dtd_failure_maps_to_its_section(fail_page, name, expected):
    report = validate_bytes(fail_page(name))
    section, level, code = expected
    match = [f for f in report.findings if f.code == code]
    assert match, f"{name}: no {code} finding in {[f.code for f in report.findings]}"
    assert match[0].section == section
    assert match[0].level == level
    assert not report.conforms


def test_one_mistake_is_one_finding(fail_page):
    """A <script> makes libxml2 say three things; the author sees one."""
    report = validate_bytes(fail_page("script"))
    assert [f.code for f in report.findings] == ["dtd-element"]


def test_findings_carry_a_line_number(fail_page):
    report = validate_bytes(fail_page("div"))
    assert report.findings[0].location.startswith("line ")


def test_messages_name_the_element(fail_page):
    report = validate_bytes(fail_page("div"))
    assert "<div>" in report.findings[0].message


def test_enumerated_values_come_from_the_dtd(fail_page):
    report = validate_bytes(fail_page("input-type-email"))
    message = report.findings[0].message
    assert "text, password, checkbox, radio, submit, reset, hidden" in message


def test_unmapped_message_still_gets_a_section():
    from mews.lint import _map_error

    code, message = _map_error("Something libxml2 made up", set())
    assert code == "dtd-other"
    assert "Mews DTD" in message


def test_entities_the_doctype_defines_are_resolved(conforming):
    report = validate_bytes(conforming(body="<p>a&nbsp;b&mdash;c</p>"))
    assert report.conforms


def test_a_conforming_page_passes(conforming):
    assert validate_bytes(conforming()).conforms