"""The tests for the Shell command component."""

import os
import tempfile
from typing import Tuple
from unittest.mock import MagicMock, patch

from homeassistant.components import shell_command
from homeassistant.setup import async_setup_component


def mock_process_creator(error: bool = False):
    """Mock a coroutine that creates a process when yielded."""

    async def communicate() -> Tuple[bytes, bytes]:
        """Mock a coroutine that runs a process when yielded.

        Returns a tuple of (stdout, stderr).
        """
        return b"I am stdout", b"I am stderr"

    mock_process = MagicMock()
    mock_process.communicate = communicate
    mock_process.returncode = int(error)
    return mock_process


async def test_executing_service(hass):
    """Test if able to call a configured service."""
    with tempfile.TemporaryDirectory() as tempdirname:
        path = os.path.join(tempdirname, "called.txt")
        assert await async_setup_component(
            hass,
            shell_command.DOMAIN,
            {shell_command.DOMAIN: {"test_service": f"date > {path}"}},
        )
        await hass.async_block_till_done()

        await hass.services.async_call("shell_command", "test_service", blocking=True)
        await hass.async_block_till_done()
        assert os.path.isfile(path)


async def test_config_not_dict(hass):
    """Test that setup fails if config is not a dict."""
    assert not await async_setup_component(
        hass,
        shell_command.DOMAIN,
        {shell_command.DOMAIN: ["some", "weird", "list"]},
    )


async def test_config_not_valid_service_names(hass):
    """Test that setup fails if config contains invalid service names."""
    assert not await async_setup_component(
        hass,
        shell_command.DOMAIN,
        {shell_command.DOMAIN: {"this is invalid because space": "touch bla.txt"}},
    )


@patch(
    "homeassistant.components.shell_command.asyncio.subprocess"
    ".create_subprocess_shell"
)
async def test_template_render_no_template(mock_call, hass):
    """Ensure shell_commands without templates get rendered properly."""
    mock_call.return_value = mock_process_creator(error=False)

    assert await async_setup_component(
        hass,
        shell_command.DOMAIN,
        {shell_command.DOMAIN: {"test_service": "ls /bin"}},
    )
    await hass.async_block_till_done()

    await hass.services.async_call("shell_command", "test_service", blocking=True)
    await hass.async_block_till_done()
    cmd = mock_call.mock_calls[0][1][0]

    assert mock_call.call_count == 1
    assert "ls /bin" == cmd


@patch(
    "homeassistant.components.shell_command.asyncio.subprocess"
    ".create_subprocess_exec"
)
async def test_template_render(mock_call, hass):
    """Ensure shell_commands with templates get rendered properly."""
    hass.states.async_set("sensor.test_state", "Works")
    mock_call.return_value = mock_process_creator(error=False)
    assert await async_setup_component(
        hass,
        shell_command.DOMAIN,
        {
            shell_command.DOMAIN: {
                "test_service": ("ls /bin {{ states.sensor.test_state.state }}")
            }
        },
    )

    await hass.services.async_call("shell_command", "test_service", blocking=True)

    await hass.async_block_till_done()
    cmd = mock_call.mock_calls[0][1]

    assert mock_call.call_count == 1
    assert ("ls", "/bin", "Works") == cmd


@patch(
    "homeassistant.components.shell_command.asyncio.subprocess"
    ".create_subprocess_shell"
)
@patch("homeassistant.components.shell_command._LOGGER.error")
async def test_subprocess_error(mock_error, mock_call, hass):
    """Test subprocess that returns an error."""
    mock_call.return_value = mock_process_creator(error=True)
    with tempfile.TemporaryDirectory() as tempdirname:
        path = os.path.join(tempdirname, "called.txt")
        assert await async_setup_component(
            hass,
            shell_command.DOMAIN,
            {shell_command.DOMAIN: {"test_service": f"touch {path}"}},
        )

        await hass.services.async_call("shell_command", "test_service", blocking=True)
        await hass.async_block_till_done()
        assert mock_call.call_count == 1
        assert mock_error.call_count == 1
        assert not os.path.isfile(path)


@patch("homeassistant.components.shell_command._LOGGER.debug")
async def test_stdout_captured(mock_output, hass):
    """Test subprocess that has stdout."""
    test_phrase = "I have output"
    assert await async_setup_component(
        hass,
        shell_command.DOMAIN,
        {shell_command.DOMAIN: {"test_service": f"echo {test_phrase}"}},
    )

    await hass.services.async_call("shell_command", "test_service", blocking=True)

    await hass.async_block_till_done()
    assert mock_output.call_count == 1
    assert test_phrase.encode() + b"\n" == mock_output.call_args_list[0][0][-1]


@patch("homeassistant.components.shell_command._LOGGER.debug")
async def test_stderr_captured(mock_output, hass):
    """Test subprocess that has stderr."""
    test_phrase = "I have error"
    assert await async_setup_component(
        hass,
        shell_command.DOMAIN,
        {shell_command.DOMAIN: {"test_service": f">&2 echo {test_phrase}"}},
    )

    await hass.services.async_call("shell_command", "test_service", blocking=True)

    await hass.async_block_till_done()
    assert mock_output.call_count == 1
    assert test_phrase.encode() + b"\n" == mock_output.call_args_list[0][0][-1]


async def test_do_no_run_forever(hass, caplog):
    """Test subprocesses terminate after the timeout."""

    with patch.object(shell_command, "COMMAND_TIMEOUT", 0.001):
        assert await async_setup_component(
            hass,
            shell_command.DOMAIN,
            {shell_command.DOMAIN: {"test_service": "sleep 10000"}},
        )
        await hass.async_block_till_done()

        await hass.services.async_call(
            shell_command.DOMAIN, "test_service", blocking=True
        )
        await hass.async_block_till_done()

    assert "Timed out" in caplog.text
    assert "sleep 10000" in caplog.text