"""systemd's shell context sequences stay out of every command's output (#41).

systemd 258 (Ubuntu 26.04) ships ``/etc/profile.d/80-systemd-osc-context.sh``.
An interactive bash then wraps every command in OSC 3008 sequences, from ``PS0``
before it runs and from ``PROMPT_COMMAND`` before the next prompt, each with a
fresh UUID. netmiko's interactive shell is such a bash: the sequences ended up in
every parsed value, and since the prompt never looked the same twice, netmiko
left the prompt line in the output as well. ``os_version`` grew past 255
characters and netOrk could not store the poll.
"""

from unittest.mock import MagicMock, patch

from napalm_linux._shell import HISTORY_OFF, PROMPT_HOOKS_OFF
from napalm_linux.linux import LinuxDriver

#: What ``cat /etc/os-release | grep PRETTY_NAME ...`` returned through netmiko on
#: an Ubuntu 26.04.1 host (2026-10-23), the prompt line already gone.
_UBUNTU_2604_OS_RELEASE = (
    "\x1b]3008;end=87c2e1c5-f850-4429-9f06-749e9be783e6;exit=success\x1b\\"
    "\x1b]3008;start=bc3bc23b-2652-4826-8192-be447f97dd6f;type=command;"
    "machineid=35cf42f3beb446bbb9aa95b937a0cf48;user=netork;hostname=ubuntu;"
    "bootid=d32bd88c-dfce-40fe-9869-257bf50ef0e0;pid=20059;cwd=/home/netork\x1b\\"
    "Ubuntu 26.04.1 LTS\n"
)


def _opened(device: MagicMock) -> LinuxDriver:
    driver = LinuxDriver("h", "admin", "p")
    with patch("napalm_linux.linux.ConnectHandler", return_value=device):
        driver.open()
    return driver


class TestPromptHooksOff:
    def test_the_session_drops_the_hooks_right_after_the_history(self):
        device = MagicMock()
        device.send_command.return_value = "/usr/bin/apt"

        _opened(device)

        sent = [c.args[0] for c in device.send_command.call_args_list]
        assert sent[:2] == [HISTORY_OFF, PROMPT_HOOKS_OFF]

    def test_it_unsets_both_hooks_including_an_array_prompt_command(self):
        # The script appends to PROMPT_COMMAND as an array; assigning the empty
        # string would only clear element 0 and leave systemd's hook running.
        assert PROMPT_HOOKS_OFF.startswith(" ")
        assert "unset PS0 PROMPT_COMMAND" in PROMPT_HOOKS_OFF

    def test_the_prompt_is_read_again_once_the_hooks_are_gone(self):
        # netmiko learned the prompt with the sequences in front of it; a prompt
        # carrying a UUID never matches again, so strip_prompt would keep failing.
        device = MagicMock()
        device.send_command.return_value = "/usr/bin/apt"

        _opened(device)

        calls = [(c[0], c.args[0] if c.args else None) for c in device.mock_calls]
        hooks_off = calls.index(("send_command", PROMPT_HOOKS_OFF))
        assert "set_base_prompt" in [name for name, _ in calls[hooks_off + 1 :]]

    def test_a_shell_that_refuses_it_does_not_stop_the_connection(self):
        device = MagicMock()
        device.send_command.side_effect = ["", Exception("no prompt"), "", "/usr/bin/apt"]

        driver = _opened(device)

        assert driver._device is device


class TestSendStripsTerminalCodes:
    def test_os_version_comes_back_without_the_context_sequences(self):
        device = MagicMock()
        device.send_command.return_value = _UBUNTU_2604_OS_RELEASE
        driver = LinuxDriver("h", "admin", "p")
        driver._device = device

        assert driver._send("cat /etc/os-release") == "Ubuntu 26.04.1 LTS"