"""The keyboard, checked without a runtime.

There is no JavaScript test runner here and hard rule 1 keeps Node out of the
project, so the behaviour is driven by hand under a DOM stub before committing.
What can be pinned in the suite is the invariant the file states about itself:
`/help` reads `SHORTCUTS`, so a shortcut that is not in that list is a shortcut
nobody can discover. That is the direction this actually rots -- a key gets
added to the handler and the sheet is forgotten.
"""

from __future__ import annotations

import re
from pathlib import Path

import lembas

SOURCE = (
    Path(lembas.__file__).parent / "web/static/js/commands.js"
).read_text(encoding="utf-8")

# The declared list, up to where the command table starts.
SHORTCUTS = SOURCE[SOURCE.index("var SHORTCUTS") : SOURCE.index("/* --- The table")]


def test_every_letter_key_the_handlers_match_is_described():
    letters = {match[-1] for match in re.findall(r'event\.code === "Key([A-Z])"', SOURCE)}
    assert letters, "no letter shortcuts found at all, which means the regex is wrong"

    missing = [letter for letter in sorted(letters) if f"+ {letter}" not in SHORTCUTS]
    assert not missing, f"not in /help: {missing}"


def test_the_three_new_ones_are_there():
    """Named rather than only counted, because the point of them is being
    findable: Enter already sends *inside the box*, and dictation and read-aloud
    were click-only."""
    assert "Ctrl/⌘ + Enter" in SHORTCUTS
    assert "Alt + M" in SHORTCUTS
    assert "Alt + R" in SHORTCUTS


def test_dictation_is_not_bound_to_alt_d():
    """Alt+D is the address bar in Chrome and Firefox on Windows and Linux. A
    shortcut the browser wins is a shortcut that looks broken."""
    assert 'event.code === "KeyD"' not in SOURCE


def test_the_shortcuts_are_matched_on_the_physical_key():
    """The file's own stated rule: `event.code`, so a Dvorak or Slovak layout
    gets the same shortcuts rather than whichever letters sit there."""
    assert "event.key ===" not in SOURCE


def test_send_from_anywhere_never_means_stop():
    """Send and Stop are the same element. Ctrl+Enter reaching it while it is
    Stop would abandon a reply on a key people press to send -- and Esc already
    stops."""
    window = SOURCE[SOURCE.index('event.code === "Enter"') :][:600]
    assert 'composerAction === "send"' in window