import json

import httpretty
import pytest

from lolafect.slack import send_message_to_slack_channel, SendSlackMessageTask


@httpretty.activate(allow_net_connect=False, verbose=True)
def test_send_message_to_slack_channel_works_properly():
    mock_webhook_url = "http://the-webhook-url.com"
    mock_message_to_channel = "Hi there!"
    httpretty.register_uri(method=httpretty.POST, uri=mock_webhook_url, status=200)

    send_message_to_slack_channel(
        webhook_url=mock_webhook_url, text_to_send=mock_message_to_channel
    )

    request_observed_by_server = httpretty.last_request()

    assert (request_observed_by_server.method == "POST") and (
        json.loads(request_observed_by_server.body.decode("UTF-8"))
        == {"text": mock_message_to_channel}
    )


@httpretty.activate(allow_net_connect=False, verbose=True)
def test_send_message_to_slack_channel_response_400_raises_exception():
    mock_webhook_url = "http://the-webhook-url.com"
    mock_message_to_channel = "Hi there!"
    httpretty.register_uri(method=httpretty.POST, uri=mock_webhook_url, status=400)

    with pytest.raises(ValueError):
        send_message_to_slack_channel(
            webhook_url=mock_webhook_url, text_to_send=mock_message_to_channel
        )


@httpretty.activate(allow_net_connect=False, verbose=True)
def test_slack_task_reaches_server_successfully():
    mock_webhook_url = "http://the-webhook-url.com"
    mock_message_to_channel = "Hi there!"
    httpretty.register_uri(method=httpretty.POST, uri=mock_webhook_url, status=200)

    slack_task = SendSlackMessageTask()
    slack_task.run(webhook_url=mock_webhook_url, text_to_send=mock_message_to_channel)

    request_observed_by_server = httpretty.last_request()
    assert (request_observed_by_server.method == "POST") and (
        json.loads(request_observed_by_server.body.decode("UTF-8"))
        == {"text": mock_message_to_channel}
    )


@httpretty.activate(allow_net_connect=False, verbose=True)
def test_slack_task_raises_value_error():
    mock_webhook_url = "http://the-webhook-url.com"
    mock_message_to_channel = "Hi there!"
    httpretty.register_uri(method=httpretty.POST, uri=mock_webhook_url, status=400)

    with pytest.raises(ValueError):
        slack_task = SendSlackMessageTask()
        slack_task.run(
            webhook_url=mock_webhook_url, text_to_send=mock_message_to_channel
        )