"""The tests for the emulated Hue component."""
from http import HTTPStatus
import json
import unittest
from unittest.mock import patch

from aiohttp import web
import defusedxml.ElementTree as ET
import pytest

from homeassistant import setup
from homeassistant.components import emulated_hue
from homeassistant.components.emulated_hue import upnp
from homeassistant.const import CONTENT_TYPE_JSON

from tests.common import get_test_instance_port

BRIDGE_SERVER_PORT = get_test_instance_port()


class MockTransport:
    """Mock asyncio transport."""

    def __init__(self):
        """Create a place to store the sends."""
        self.sends = []

    def sendto(self, response, addr):
        """Mock sendto."""
        self.sends.append((response, addr))


@pytest.fixture
def aiohttp_client(event_loop, aiohttp_client, socket_enabled):
    """Return aiohttp_client and allow opening sockets."""
    return aiohttp_client


@pytest.fixture
def hue_client(aiohttp_client):
    """Return a hue API client."""
    app = web.Application()
    with unittest.mock.patch(
        "homeassistant.components.emulated_hue.web.Application", return_value=app
    ):

        async def client():
            """Return an authenticated client."""
            return await aiohttp_client(app)

        yield client


async def setup_hue(hass):
    """Set up the emulated_hue integration."""
    with patch(
        "homeassistant.components.emulated_hue.async_create_upnp_datagram_endpoint"
    ):
        assert await setup.async_setup_component(
            hass,
            emulated_hue.DOMAIN,
            {emulated_hue.DOMAIN: {emulated_hue.CONF_LISTEN_PORT: BRIDGE_SERVER_PORT}},
        )
        await hass.async_block_till_done()


def test_upnp_discovery_basic() -> None:
    """Tests the UPnP basic discovery response."""
    upnp_responder_protocol = upnp.UPNPResponderProtocol(None, None, "192.0.2.42", 8080)
    mock_transport = MockTransport()
    upnp_responder_protocol.transport = mock_transport

    """Original request emitted by the Hue Bridge v1 app."""
    request = """M-SEARCH * HTTP/1.1
HOST:239.255.255.250:1900
ST:ssdp:all
Man:"ssdp:discover"
MX:3

"""
    encoded_request = request.replace("\n", "\r\n").encode("utf-8")

    upnp_responder_protocol.datagram_received(encoded_request, 1234)
    expected_response = """HTTP/1.1 200 OK
CACHE-CONTROL: max-age=60
EXT:
LOCATION: http://192.0.2.42:8080/description.xml
SERVER: FreeRTOS/6.0.5, UPnP/1.0, IpBridge/1.16.0
hue-bridgeid: 001788FFFE23BFC2
ST: urn:schemas-upnp-org:device:basic:1
USN: uuid:2f402f80-da50-11e1-9b23-001788255acc

"""
    expected_send = expected_response.replace("\n", "\r\n").encode("utf-8")

    assert mock_transport.sends == [(expected_send, 1234)]


def test_upnp_discovery_rootdevice() -> None:
    """Tests the UPnP rootdevice discovery response."""
    upnp_responder_protocol = upnp.UPNPResponderProtocol(None, None, "192.0.2.42", 8080)
    mock_transport = MockTransport()
    upnp_responder_protocol.transport = mock_transport

    """Original request emitted by Busch-Jaeger free@home SysAP."""
    request = """M-SEARCH * HTTP/1.1
HOST: 239.255.255.250:1900
MAN: "ssdp:discover"
MX: 40
ST: upnp:rootdevice

"""
    encoded_request = request.replace("\n", "\r\n").encode("utf-8")

    upnp_responder_protocol.datagram_received(encoded_request, 1234)
    expected_response = """HTTP/1.1 200 OK
CACHE-CONTROL: max-age=60
EXT:
LOCATION: http://192.0.2.42:8080/description.xml
SERVER: FreeRTOS/6.0.5, UPnP/1.0, IpBridge/1.16.0
hue-bridgeid: 001788FFFE23BFC2
ST: upnp:rootdevice
USN: uuid:2f402f80-da50-11e1-9b23-001788255acc::upnp:rootdevice

"""
    expected_send = expected_response.replace("\n", "\r\n").encode("utf-8")

    assert mock_transport.sends == [(expected_send, 1234)]


def test_upnp_no_response() -> None:
    """Tests the UPnP does not response on an invalid request."""
    upnp_responder_protocol = upnp.UPNPResponderProtocol(None, None, "192.0.2.42", 8080)
    mock_transport = MockTransport()
    upnp_responder_protocol.transport = mock_transport

    """Original request emitted by the Hue Bridge v1 app."""
    request = """INVALID * HTTP/1.1
HOST:239.255.255.250:1900
ST:ssdp:all
Man:"ssdp:discover"
MX:3

"""
    encoded_request = request.replace("\n", "\r\n").encode("utf-8")

    upnp_responder_protocol.datagram_received(encoded_request, 1234)

    assert mock_transport.sends == []


async def test_description_xml(hass, hue_client):
    """Test the description."""
    await setup_hue(hass)
    client = await hue_client()
    result = await client.get("/description.xml", timeout=5)

    assert result.status == HTTPStatus.OK
    assert "text/xml" in result.headers["content-type"]

    try:
        root = ET.fromstring(await result.text())
        ns = {"s": "urn:schemas-upnp-org:device-1-0"}
        assert root.find("./s:device/s:serialNumber", ns).text == "001788FFFE23BFC2"
    except Exception:  # pylint: disable=broad-except
        pytest.fail("description.xml is not valid XML!")


async def test_create_username(hass, hue_client):
    """Test the creation of an username."""
    await setup_hue(hass)
    client = await hue_client()
    request_json = {"devicetype": "my_device"}

    result = await client.post("/api", data=json.dumps(request_json), timeout=5)

    assert result.status == HTTPStatus.OK
    assert CONTENT_TYPE_JSON in result.headers["content-type"]

    resp_json = await result.json()
    success_json = resp_json[0]

    assert "success" in success_json
    assert "username" in success_json["success"]


async def test_unauthorized_view(hass, hue_client):
    """Test unauthorized view."""
    await setup_hue(hass)
    client = await hue_client()
    request_json = {"devicetype": "my_device"}

    result = await client.get(
        "/api/unauthorized", data=json.dumps(request_json), timeout=5
    )

    assert result.status == HTTPStatus.OK
    assert CONTENT_TYPE_JSON in result.headers["content-type"]

    resp_json = await result.json()
    assert len(resp_json) == 1
    success_json = resp_json[0]
    assert len(success_json) == 1

    assert "error" in success_json
    error_json = success_json["error"]
    assert len(error_json) == 3
    assert "/" in error_json["address"]
    assert "unauthorized user" in error_json["description"]
    assert "1" in error_json["type"]


async def test_valid_username_request(hass, hue_client):
    """Test request with a valid username."""
    await setup_hue(hass)
    client = await hue_client()
    request_json = {"invalid_key": "my_device"}

    result = await client.post("/api", data=json.dumps(request_json), timeout=5)

    assert result.status == HTTPStatus.BAD_REQUEST