"""Regression tests for issue #87711 — Ctrl+key / Alt+key combos broken
under modifyOtherKeys level 2.

When the CLI pushes ``ESC[>4;2m`` (modifyOtherKeys=2) to supported
terminals so Shift+Enter is distinguishable from Enter, the terminal
re-encodes EVERY Ctrl+key combo as ``ESC[27;5;<codepoint>~`` instead of
the raw control byte (``\\x01`` etc.). prompt_toolkit 3.x only ships a
mapping for ``ESC[27;5;13~`` (Ctrl+Enter = Ctrl+M); all other Ctrl+letter
combos are unmapped and leak as literal text or get swallowed.

``install_modify_other_keys_aliases()`` populates ``ANSI_SEQUENCES`` with
the full set so every Ctrl+combo continues to fire the same key binding
the raw byte would.
"""

from __future__ import annotations

import pytest

from prompt_toolkit.input.ansi_escape_sequences import ANSI_SEQUENCES
from prompt_toolkit.input.vt100_parser import Vt100Parser
from prompt_toolkit.keys import Keys

from hermes_cli.pt_input_extras import install_modify_other_keys_aliases


@pytest.fixture(autouse=True)
def _ensure_alias_installed():
    """Install the alias for each test, then restore ANSI_SEQUENCES to its
    prior state so the hundreds of installed mappings don't leak into
    sibling test files."""
    from prompt_toolkit.input.ansi_escape_sequences import ANSI_SEQUENCES as _seq
    saved = dict(_seq)
    install_modify_other_keys_aliases()
    yield
    _seq.clear()
    _seq.update(saved)
    # Drop the parser's prefix cache too — it was computed against the
    # augmented table and would go stale after the restore above.
    from prompt_toolkit.input.vt100_parser import _IS_PREFIX_OF_LONGER_MATCH_CACHE
    _IS_PREFIX_OF_LONGER_MATCH_CACHE.clear()


def _parse(byte_seq: str):
    """Feed bytes through prompt_toolkit's VT100 parser and return the
    list of KeyPress objects."""
    out = []
    parser = Vt100Parser(out.append)
    for ch in byte_seq:
        parser.feed(ch)
    parser.flush()
    return [kp.key for kp in out]


# ---------------------------------------------------------------------------
# Ctrl+letter: a-z
# ---------------------------------------------------------------------------

CTRL_LETTERS = [chr(c) for c in range(ord('a'), ord('z') + 1)]


@pytest.mark.parametrize("letter", CTRL_LETTERS)
def test_modify_other_keys_ctrl_letter_parses_as_raw_byte(letter):
    """Ctrl+<letter> under modifyOtherKeys must parse identically to the
    raw control byte that prompt_toolkit already understands."""
    raw_byte = chr(ord(letter) - ord('a') + 1)  # Ctrl+a = \x01, etc.
    raw_result = _parse(raw_byte)
    assert len(raw_result) == 1, f"raw byte {raw_byte!r} should produce 1 keypress"

    # modifyOtherKeys format
    mok_seq = f"\x1b[27;5;{ord(letter)}~"
    mok_result = _parse(mok_seq)
    assert mok_result == raw_result, (
        f"modifyOtherKeys Ctrl+{letter} ({mok_seq!r}) should parse identically "
        f"to raw {raw_byte!r}; got {mok_result!r} vs {raw_result!r}"
    )

    # CSI-u format
    csiu_seq = f"\x1b[{ord(letter)};5u"
    csiu_result = _parse(csiu_seq)
    assert csiu_result == raw_result, (
        f"CSI-u Ctrl+{letter} ({csiu_seq!r}) should parse identically "
        f"to raw {raw_byte!r}; got {csiu_result!r} vs {raw_result!r}"
    )


@pytest.mark.parametrize("letter", CTRL_LETTERS)
def test_modify_other_keys_ctrl_letter_single_keypress(letter):
    """Each Ctrl+letter sequence must produce exactly one keypress —
    a partial match would emit Escape plus literal text."""
    for seq in (f"\x1b[27;5;{ord(letter)}~", f"\x1b[{ord(letter)};5u"):
        result = _parse(seq)
        assert len(result) == 1, (
            f"{seq!r} should produce exactly 1 keypress, got {len(result)}: {result!r}"
        )


# ---------------------------------------------------------------------------
# Critical individual shortcuts
# ---------------------------------------------------------------------------

def test_ctrl_c_under_modify_other_keys():
    """Ctrl+C must produce Keys.ControlC, not literal text (#56684)."""
    assert _parse("\x1b[27;5;99~") == [Keys.ControlC]
    assert _parse("\x1b[99;5u") == [Keys.ControlC]


def test_ctrl_a_under_modify_other_keys():
    """Ctrl+A (line start) must still fire."""
    assert _parse("\x1b[27;5;97~") == [Keys.ControlA]
    assert _parse("\x1b[97;5u") == [Keys.ControlA]


def test_ctrl_e_under_modify_other_keys():
    """Ctrl+E (line end) must still fire."""
    assert _parse("\x1b[27;5;101~") == [Keys.ControlE]
    assert _parse("\x1b[101;5u") == [Keys.ControlE]


def test_ctrl_u_under_modify_other_keys():
    """Ctrl+U (kill line) must still fire."""
    assert _parse("\x1b[27;5;117~") == [Keys.ControlU]
    assert _parse("\x1b[117;5u") == [Keys.ControlU]


def test_ctrl_k_under_modify_other_keys():
    """Ctrl+K (kill to end) must still fire."""
    assert _parse("\x1b[27;5;107~") == [Keys.ControlK]
    assert _parse("\x1b[107;5u") == [Keys.ControlK]


def test_ctrl_r_under_modify_other_keys():
    """Ctrl+R (reverse search) must still fire."""
    assert _parse("\x1b[27;5;114~") == [Keys.ControlR]
    assert _parse("\x1b[114;5u") == [Keys.ControlR]


def test_ctrl_d_under_modify_other_keys():
    """Ctrl+D (EOF / delete) must still fire."""
    assert _parse("\x1b[27;5;100~") == [Keys.ControlD]
    assert _parse("\x1b[100;5u") == [Keys.ControlD]


def test_ctrl_w_under_modify_other_keys():
    """Ctrl+W (delete word) must still fire."""
    assert _parse("\x1b[27;5;119~") == [Keys.ControlW]
    assert _parse("\x1b[119;5u") == [Keys.ControlW]


def test_ctrl_z_under_modify_other_keys():
    """Ctrl+Z (suspend) must still fire."""
    assert _parse("\x1b[27;5;122~") == [Keys.ControlZ]
    assert _parse("\x1b[122;5u") == [Keys.ControlZ]


def test_ctrl_l_under_modify_other_keys():
    """Ctrl+L (clear screen) must still fire."""
    assert _parse("\x1b[27;5;108~") == [Keys.ControlL]
    assert _parse("\x1b[108;5u") == [Keys.ControlL]


# ---------------------------------------------------------------------------
# Ctrl+digit: 0-9
# ---------------------------------------------------------------------------

@pytest.mark.parametrize("digit", [str(d) for d in range(10)])
def test_modify_other_keys_ctrl_digit(digit):
    """Ctrl+digit under modifyOtherKeys must map to Keys.Control<digit>."""
    codepoint = ord(digit)
    expected = getattr(Keys, f"Control{digit}")

    mok_seq = f"\x1b[27;5;{codepoint}~"
    assert _parse(mok_seq) == [expected], (
        f"modifyOtherKeys Ctrl+{digit} ({mok_seq!r}) should parse as {expected}"
    )

    csiu_seq = f"\x1b[{codepoint};5u"
    assert _parse(csiu_seq) == [expected], (
        f"CSI-u Ctrl+{digit} ({csiu_seq!r}) should parse as {expected}"
    )


# ---------------------------------------------------------------------------
# Ctrl+symbol
# ---------------------------------------------------------------------------

def test_ctrl_left_bracket_under_modify_other_keys():
    """Ctrl+[ = Escape under modifyOtherKeys."""
    assert _parse("\x1b[27;5;91~") == _parse("\x1b")
    assert _parse("\x1b[91;5u") == _parse("\x1b")


def test_ctrl_backslash_under_modify_other_keys():
    """Ctrl+\\ = ControlBackslash under modifyOtherKeys."""
    assert _parse("\x1b[27;5;92~") == [Keys.ControlBackslash]
    assert _parse("\x1b[92;5u") == [Keys.ControlBackslash]


def test_ctrl_right_bracket_under_modify_other_keys():
    """Ctrl+] = ControlSquareClose under modifyOtherKeys."""
    assert _parse("\x1b[27;5;93~") == [Keys.ControlSquareClose]
    assert _parse("\x1b[93;5u") == [Keys.ControlSquareClose]


def test_ctrl_space_under_modify_other_keys():
    """Ctrl+Space = ControlAt (NUL) under modifyOtherKeys."""
    assert _parse("\x1b[27;5;32~") == _parse("\x00")
    assert _parse("\x1b[32;5u") == _parse("\x00")


# ---------------------------------------------------------------------------
# Alt+letter
# ---------------------------------------------------------------------------

@pytest.mark.parametrize("letter", [chr(c) for c in range(ord('a'), ord('z') + 1)])
def test_modify_other_keys_alt_letter_parses_as_escape_letter(letter):
    """Alt+<letter> under modifyOtherKeys must parse to the same tuple
    that a bare ESC+<letter> produces."""
    bare_result = _parse(f"\x1b{letter}")
    assert len(bare_result) == 2, f"bare ESC+{letter} should produce 2 keypresses"

    mok_seq = f"\x1b[27;3;{ord(letter)}~"
    mok_result = _parse(mok_seq)
    assert mok_result == bare_result, (
        f"modifyOtherKeys Alt+{letter} ({mok_seq!r}) should parse identically "
        f"to bare ESC+{letter}; got {mok_result!r} vs {bare_result!r}"
    )

    csiu_seq = f"\x1b[{ord(letter)};3u"
    csiu_result = _parse(csiu_seq)
    assert csiu_result == bare_result, (
        f"CSI-u Alt+{letter} ({csiu_seq!r}) should parse identically "
        f"to bare ESC+{letter}; got {csiu_result!r} vs {bare_result!r}"
    )


# ---------------------------------------------------------------------------
# Idempotency and non-clobbering
# ---------------------------------------------------------------------------

def test_install_is_idempotent():
    install_modify_other_keys_aliases()
    assert install_modify_other_keys_aliases() == 0


# ---------------------------------------------------------------------------
# Shift+letter → uppercase
# ---------------------------------------------------------------------------

@pytest.mark.parametrize("letter", [chr(c) for c in range(ord('a'), ord('z') + 1)])
def test_modify_other_keys_shift_letter_produces_uppercase(letter):
    """Shift+<letter> under modifyOtherKeys must produce the uppercase
    character, not leak as literal escape text — the 'caps locked' bug."""
    upper = letter.upper()
    # modifyOtherKeys format
    mok_seq = f"\x1b[27;2;{ord(letter)}~"
    assert _parse(mok_seq) == [upper], (
        f"modifyOtherKeys Shift+{letter} ({mok_seq!r}) should produce '{upper}'"
    )
    # CSI-u format
    csiu_seq = f"\x1b[{ord(letter)};2u"
    assert _parse(csiu_seq) == [upper], (
        f"CSI-u Shift+{letter} ({csiu_seq!r}) should produce '{upper}'"
    )


def test_does_not_clobber_shift_enter_alias():
    """install_modify_other_keys_aliases must not overwrite mappings
    installed by install_shift_enter_alias (modifier=2, not 5)."""
    from hermes_cli.pt_input_extras import install_shift_enter_alias
    install_shift_enter_alias()
    assert ANSI_SEQUENCES["\x1b[27;2;13~"] == (Keys.Escape, Keys.ControlM)
    assert ANSI_SEQUENCES["\x1b[13;2u"] == (Keys.Escape, Keys.ControlM)


def test_does_not_clobber_ctrl_enter_alias():
    """install_modify_other_keys_aliases must not overwrite mappings
    installed by install_ctrl_enter_alias (which maps Ctrl+Enter)."""
    from hermes_cli.pt_input_extras import install_ctrl_enter_alias
    install_ctrl_enter_alias()
    # Ctrl+Enter (modifier=5, codepoint=13) is mapped to (Escape, ControlM)
    assert ANSI_SEQUENCES["\x1b[27;5;13~"] == (Keys.Escape, Keys.ControlM)
    assert ANSI_SEQUENCES["\x1b[13;5u"] == (Keys.Escape, Keys.ControlM)


def test_ctrl_enter_still_works_under_modify_other_keys():
    """Ctrl+Enter must produce the Alt+Enter newline tuple, not plain Ctrl+M.
    This is the install_ctrl_enter_alias behavior — our new function must
    not clobber it."""
    from hermes_cli.pt_input_extras import install_ctrl_enter_alias
    install_ctrl_enter_alias()
    install_modify_other_keys_aliases()

    alt_enter = _parse("\x1b\r")
    ctrl_enter_mok = _parse("\x1b[27;5;13~")
    ctrl_enter_csiu = _parse("\x1b[13;5u")
    assert ctrl_enter_mok == alt_enter
    assert ctrl_enter_csiu == alt_enter


def test_plain_enter_remains_distinct():
    """Plain Enter must keep producing a single keypress (submit), not
    the two-key Alt+Enter tuple."""
    enter = _parse("\r")
    alt_enter = _parse("\x1b\r")
    assert enter != alt_enter
    assert len(enter) == 1
    assert len(alt_enter) == 2


# ---------------------------------------------------------------------------
# Kitty keyboard protocol: the Esc KEY (disambiguate mode, #56684)
# ---------------------------------------------------------------------------

def test_kitty_plain_escape_key():
    """The Esc key under kitty disambiguate mode (ESC[27u) must parse as
    Keys.Escape, not leak '[27u' as literal text."""
    assert _parse("\x1b[27u") == [Keys.Escape]


@pytest.mark.parametrize("modifier", range(2, 9))
def test_kitty_modified_escape_key(modifier):
    """Modified Esc (Shift+Esc etc.) still behaves as Escape."""
    assert _parse(f"\x1b[27;{modifier}u") == [Keys.Escape]


# ---------------------------------------------------------------------------
# Modified Enter / Tab / Backspace / Space
# ---------------------------------------------------------------------------

def test_alt_enter_produces_newline_tuple():
    """Alt+Enter under either protocol must equal bare ESC+CR (newline)."""
    alt_enter = _parse("\x1b\r")
    assert _parse("\x1b[13;3u") == alt_enter
    assert _parse("\x1b[27;3;13~") == alt_enter


def test_shift_tab_produces_backtab():
    """Shift+Tab must behave like the legacy ESC[Z (BackTab)."""
    assert _parse("\x1b[9;2u") == [Keys.BackTab]
    assert _parse("\x1b[27;2;9~") == [Keys.BackTab]


def test_ctrl_backspace_produces_backward_kill_word():
    """Ctrl+Backspace must produce the (Escape, ControlH) tuple that fires
    prompt_toolkit's backward-kill-word — parity with the Ink TUI and
    Desktop (#78285)."""
    expected = [Keys.Escape, Keys.ControlH]
    assert _parse("\x1b[127;5u") == expected
    assert _parse("\x1b[27;5;127~") == expected


def test_alt_backspace_produces_backward_kill_word():
    """Alt+Backspace = ESC+DEL = backward-kill-word."""
    assert _parse("\x1b[127;3u") == [Keys.Escape, Keys.ControlH]
    assert _parse("\x1b[27;3;127~") == [Keys.Escape, Keys.ControlH]


def test_shift_backspace_is_plain_backspace():
    assert _parse("\x1b[127;2u") == _parse("\x7f")


def test_shift_space_inserts_space():
    """Shift+Space must insert a space, not leak escape text (#86866)."""
    assert _parse("\x1b[32;2u") == [" "]
    assert _parse("\x1b[27;2;32~") == [" "]


# ---------------------------------------------------------------------------
# Multi-modifier combos (Ctrl+Shift / Ctrl+Alt / Shift+Alt / Ctrl+Alt+Shift)
# ---------------------------------------------------------------------------

@pytest.mark.parametrize("letter", ["c", "r", "z"])
def test_ctrl_shift_letter_behaves_as_ctrl(letter):
    """Ctrl+Shift+<letter> (modifier 6) must fire the same key as
    Ctrl+<letter> — both the unshifted and shifted codepoint variants."""
    expected = _parse(chr(ord(letter) & 0x1F))
    for cp in (ord(letter), ord(letter) - 32):
        assert _parse(f"\x1b[{cp};6u") == expected
        assert _parse(f"\x1b[27;6;{cp}~") == expected


def test_ctrl_alt_letter_behaves_as_escape_ctrl():
    """Ctrl+Alt+a (modifier 7) = Escape prefix + ControlA."""
    assert _parse("\x1b[97;7u") == [Keys.Escape, Keys.ControlA]


def test_ctrl_alt_shift_letter_behaves_as_escape_ctrl():
    """Ctrl+Alt+Shift+a (modifier 8) = Escape prefix + ControlA."""
    assert _parse("\x1b[97;8u") == [Keys.Escape, Keys.ControlA]


def test_shift_alt_letter_behaves_as_escape_upper():
    """Shift+Alt+f (modifier 4) = Escape prefix + 'F'."""
    assert _parse("\x1b[102;4u") == [Keys.Escape, "F"]


# ---------------------------------------------------------------------------
# Kitty functional keys (Private Use Area codepoints)
# ---------------------------------------------------------------------------

def test_keypad_enter_behaves_as_enter():
    assert _parse("\x1b[57414u") == _parse("\r")


@pytest.mark.parametrize("digit", range(10))
def test_keypad_digits_type_digits(digit):
    assert _parse(f"\x1b[{57399 + digit}u") == [str(digit)]


def test_keypad_navigation_maps_to_arrows():
    assert _parse("\x1b[57417u") == [Keys.Left]
    assert _parse("\x1b[57418u") == [Keys.Right]
    assert _parse("\x1b[57419u") == [Keys.Up]
    assert _parse("\x1b[57420u") == [Keys.Down]


def test_f13_maps_to_f13():
    assert _parse("\x1b[57376u") == [Keys.F13]


@pytest.mark.parametrize("code", [57358, 57428, 57441, 57448])
def test_lock_media_modifier_events_are_consumed(code):
    """Caps Lock, media keys, and bare modifier press events must be
    consumed (Keys.Ignore), never leak as literal text."""
    result = _parse(f"\x1b[{code}u")
    assert result == [Keys.Ignore], f"CSI {code}u leaked: {result!r}"


def test_cmd_backspace_alias_not_clobbered():
    """install_cmd_backspace_alias's super-modifier mappings must survive."""
    from hermes_cli.pt_input_extras import install_cmd_backspace_alias
    install_cmd_backspace_alias()
    install_modify_other_keys_aliases()
    assert _parse("\x1b[127;9u") == [Keys.ControlU]


# ---------------------------------------------------------------------------
# Lock-bit variants (#89651): kitty/ghostty OR the CapsLock (64) / NumLock
# (128) state into the CSI-u modifier parameter, so with a lock enabled
# every combo arrives shifted (ESC[99;133u instead of ESC[99;5u) and died
# as literal text without these aliases.
# ---------------------------------------------------------------------------


@pytest.mark.parametrize("letter", CTRL_LETTERS)
def test_ctrl_letter_with_numlock_parses_as_raw_byte(letter):
    """Ctrl+<letter> with NumLock on (modifier + 128) must parse identically
    to the raw control byte — the exact garbage from #89651 ([127;133u)."""
    raw_byte = chr(ord(letter) - ord('a') + 1)
    raw_result = _parse(raw_byte)

    numlock_seq = f"\x1b[{ord(letter)};133u"  # 5 + 128
    assert _parse(numlock_seq) == raw_result, (
        f"NumLock Ctrl+{letter} ({numlock_seq!r}) should parse identically "
        f"to raw {raw_byte!r}"
    )


@pytest.mark.parametrize("letter", ["a", "c", "z"])
def test_ctrl_letter_with_capslock_parses_as_raw_byte(letter):
    raw_byte = chr(ord(letter) - ord('a') + 1)
    capslock_seq = f"\x1b[{ord(letter)};69u"  # 5 + 64
    assert _parse(capslock_seq) == _parse(raw_byte)


def test_ctrl_c_with_both_locks_parses_as_raw_byte():
    """Ctrl+C with CapsLock and NumLock both on (5 + 64 + 128 = 197)."""
    assert _parse("\x1b[99;197u") == _parse("\x03")


def test_alt_letter_with_numlock_keeps_escape_prefix():
    assert _parse("\x1b[97;131u") == [Keys.Escape, "a"]  # 3 + 128


def test_shift_letter_with_capslock_types_uppercase():
    assert _parse("\x1b[97;66u") == ["A"]  # 2 + 64


def test_esc_key_with_numlock_is_escape():
    assert _parse("\x1b[27;129u") == [Keys.Escape]  # 1 + 128
    assert _parse("\x1b[27;133u") == [Keys.Escape]  # 5 + 128


def test_ctrl_backspace_with_numlock_is_backward_kill_word():
    """The exact sequence from the #89651 report ([127;133u)."""
    assert _parse("\x1b[127;133u") == [Keys.Escape, Keys.ControlH]


def test_modify_other_keys_tilde_form_has_no_lock_variants():
    """The xterm modifyOtherKeys encoding never carries lock bits, so no
    +64/+128 variants of the ESC[27;N;CP~ form may be installed."""
    for seq in ("\x1b[27;69;99~", "\x1b[27;133;99~", "\x1b[27;197;99~"):
        assert seq not in ANSI_SEQUENCES


# ---------------------------------------------------------------------------
# Follow-up widening: lock twins on the alias installers, legacy CSI-letter /
# CSI-tilde navigation, unmodified CSI-u keys, and PUA functional keys.
# ---------------------------------------------------------------------------


def test_lock_bits_on_legacy_cursor_keys_map_to_plain_keys():
    """kitty stamps lock bits onto legacy CSI-letter arrows too:
    plain Down + NumLock = ESC[1;129B, CapsLock = ESC[1;65B, both = 193."""
    for mod, key in ((129, Keys.Down), (65, Keys.Down), (193, Keys.Down)):
        assert _parse(f"\x1b[1;{mod}B") == [key]
    assert _parse("\x1b[1;130B") == [Keys.ShiftDown]   # Shift + NumLock
    assert _parse("\x1b[1;131D") == [Keys.Escape, Keys.Left]  # Alt + NumLock
    assert _parse("\x1b[1;133D") == [Keys.ControlLeft]        # Ctrl + NumLock


def test_lock_bits_on_tilde_navigation_keys():
    """Delete/PageUp/etc. carry the modifier in CSI-tilde form."""
    assert _parse("\x1b[3;129~") == [Keys.Delete]
    assert _parse("\x1b[3;69~") == [Keys.ControlDelete]   # Ctrl+Delete + Caps
    assert _parse("\x1b[5;193~") == [Keys.PageUp]         # both locks


def test_lock_bits_on_plain_f1_through_f4():
    """Plain F1-F4 base mappings are SS3 (ESC O P); their CSI lock twins
    must still resolve (ESC[1;129P etc.)."""
    base = _parse("\x1bOP")
    assert _parse("\x1b[1;129P") == base
    assert _parse("\x1b[1;65P") == base


def test_lock_bits_on_unmodified_csi_u_keys():
    """Tab/Enter/Space/Backspace with only a lock held (modifier 1+lock)."""
    assert _parse("\x1b[9;65u") == _parse("\t")
    assert _parse("\x1b[13;193u") == _parse("\r")
    assert _parse("\x1b[32;129u") == _parse(" ")
    assert _parse("\x1b[127;129u") == _parse("\x7f")


def test_lock_bits_on_pua_functional_keys():
    """Kitty PUA functional keys (keypad, F13+) keep working under locks —
    NumLock especially matters because it gates the keypad itself."""
    assert _parse("\x1b[57399;129u") == ["0"]        # KP_0 + NumLock
    assert _parse("\x1b[57376;129u") == [Keys.F13]   # F13 + NumLock
    assert _parse("\x1b[57427;129u") == [Keys.Ignore]  # KP_BEGIN + NumLock


def test_lock_bits_on_shift_enter_and_ctrl_enter_aliases():
    from hermes_cli.pt_input_extras import (
        install_ctrl_enter_alias,
        install_shift_enter_alias,
    )
    install_shift_enter_alias()
    install_ctrl_enter_alias()
    newline = _parse("\x1b\r")
    assert _parse("\x1b[13;130u") == newline   # Shift+Enter + NumLock
    assert _parse("\x1b[13;66u") == newline    # Shift+Enter + CapsLock
    assert _parse("\x1b[13;133u") == newline   # Ctrl+Enter + NumLock


def test_lock_bits_on_cmd_backspace_alias():
    from hermes_cli.pt_input_extras import install_cmd_backspace_alias
    install_cmd_backspace_alias()
    assert _parse("\x1b[127;137u") == [Keys.ControlU]  # Cmd+Backspace + NumLock
    assert _parse("\x1b[127;73u") == [Keys.ControlU]   # Cmd+Backspace + Caps
    assert _parse("\x1b[3;137~") == [Keys.ControlK]    # Cmd+FwdDel + NumLock