from datetime import datetime
from unittest.mock import MagicMock, Mock, patch

import requests

from PyQt5.QtGui import QDesktopServices
from PyQt5.QtNetwork import QNetworkReply

from UM.Preferences import Preferences
from cura.OAuth2.AuthorizationHelpers import AuthorizationHelpers, TOKEN_TIMESTAMP_FORMAT
from cura.OAuth2.AuthorizationService import AuthorizationService, MYCLOUD_LOGOFF_URL
from cura.OAuth2.LocalAuthorizationServer import LocalAuthorizationServer
from cura.OAuth2.Models import OAuth2Settings, AuthenticationResponse, UserProfile

CALLBACK_PORT = 32118
OAUTH_ROOT = "https://account.ultimaker.com"
CLOUD_API_ROOT = "https://api.ultimaker.com"

OAUTH_SETTINGS = OAuth2Settings(
    OAUTH_SERVER_URL= OAUTH_ROOT,
    CALLBACK_PORT=CALLBACK_PORT,
    CALLBACK_URL="http://localhost:{}/callback".format(CALLBACK_PORT),
    CLIENT_ID="",
    CLIENT_SCOPES="",
    AUTH_DATA_PREFERENCE_KEY="test/auth_data",
    AUTH_SUCCESS_REDIRECT="{}/app/auth-success".format(OAUTH_ROOT),
    AUTH_FAILED_REDIRECT="{}/app/auth-error".format(OAUTH_ROOT)
)

FAILED_AUTH_RESPONSE = AuthenticationResponse(
    success = False,
    err_message = "FAILURE!"
)

SUCCESSFUL_AUTH_RESPONSE = AuthenticationResponse(
    access_token = "beep",
    refresh_token = "beep?",
    received_at = datetime.now().strftime(TOKEN_TIMESTAMP_FORMAT),
    expires_in = 300,  # 5 minutes should be more than enough for testing
    success = True
)

EXPIRED_AUTH_RESPONSE = AuthenticationResponse(
    access_token = "expired",
    refresh_token = "beep?",
    received_at = datetime.now().strftime(TOKEN_TIMESTAMP_FORMAT),
    expires_in = 300,  # 5 minutes should be more than enough for testing
    success = True
)

NO_REFRESH_AUTH_RESPONSE = AuthenticationResponse(
    access_token = "beep",
    received_at = datetime.now().strftime(TOKEN_TIMESTAMP_FORMAT),
    expires_in = 300,  # 5 minutes should be more than enough for testing
    success = True
)

MALFORMED_AUTH_RESPONSE = AuthenticationResponse(success=False)


def test_cleanAuthService() -> None:
    """
    Ensure that when setting up an AuthorizationService, no data is set.
    """
    authorization_service = AuthorizationService(OAUTH_SETTINGS, Preferences())
    authorization_service.initialize()

    mock_callback = Mock()
    authorization_service.getUserProfile(mock_callback)
    mock_callback.assert_called_once_with(None)

    assert authorization_service.getAccessToken() is None

def test_refreshAccessTokenSuccess():
    authorization_service = AuthorizationService(OAUTH_SETTINGS, Preferences())
    authorization_service.initialize()
    with patch.object(AuthorizationService, "getUserProfile", return_value=UserProfile()):
        authorization_service._storeAuthData(SUCCESSFUL_AUTH_RESPONSE)
    authorization_service.onAuthStateChanged.emit = MagicMock()

    with patch.object(AuthorizationHelpers, "getAccessTokenUsingRefreshToken", return_value=SUCCESSFUL_AUTH_RESPONSE):
        authorization_service.refreshAccessToken()
        assert authorization_service.onAuthStateChanged.emit.called_with(True)

def test__parseJWTNoRefreshToken():
    """
    Tests parsing the user profile if there is no refresh token stored, but there is a normal authentication token.

    The request for the user profile using the authentication token should still work normally.
    """
    authorization_service = AuthorizationService(OAUTH_SETTINGS, Preferences())
    with patch.object(AuthorizationService, "getUserProfile", return_value = UserProfile()):
        authorization_service._storeAuthData(NO_REFRESH_AUTH_RESPONSE)

    mock_callback = Mock()  # To log the final profile response.
    mock_reply = Mock()  # The user profile that the service should respond with.
    mock_reply.error = Mock(return_value = QNetworkReply.NetworkError.NoError)

    http_mock = Mock()
    http_mock.get = lambda url, headers_dict, callback, error_callback: callback(mock_reply)
    http_mock.readJSON = Mock(return_value = {"data": {"user_id": "id_ego_or_superego", "username": "Ghostkeeper"}})

    with patch("UM.TaskManagement.HttpRequestManager.HttpRequestManager.getInstance", MagicMock(return_value = http_mock)):
        authorization_service._parseJWT(mock_callback)
    mock_callback.assert_called_once()
    profile_reply = mock_callback.call_args_list[0][0][0]
    assert profile_reply.user_id == "id_ego_or_superego"
    assert profile_reply.username == "Ghostkeeper"

def test__parseJWTFailOnRefresh():
    """
    Tries to refresh the authentication token using an invalid refresh token. The request should fail.
    """
    authorization_service = AuthorizationService(OAUTH_SETTINGS, Preferences())
    with patch.object(AuthorizationService, "getUserProfile", return_value = UserProfile()):
        authorization_service._storeAuthData(SUCCESSFUL_AUTH_RESPONSE)

    mock_callback = Mock()  # To log the final profile response.
    mock_reply = Mock()  # The response that the request should give, containing an error about it failing to authenticate.
    mock_reply.error = Mock(return_value = QNetworkReply.NetworkError.AuthenticationRequiredError)  # The reply is 403: Authentication required, meaning the server responded with a "Can't do that, Dave".
    http_mock = Mock()
    http_mock.get = lambda url, headers_dict, callback, error_callback: callback(mock_reply)
    http_mock.post = lambda url, data, headers_dict, callback, error_callback: callback(mock_reply)

    with patch("UM.TaskManagement.HttpRequestManager.HttpRequestManager.readJSON", Mock(return_value = {"error_description": "Mock a failed request!"})):
        with patch("UM.TaskManagement.HttpRequestManager.HttpRequestManager.getInstance", MagicMock(return_value = http_mock)):
            authorization_service._parseJWT(mock_callback)
    mock_callback.assert_called_once_with(None)

def test__parseJWTSucceedOnRefresh():
    """
    Tries to refresh the authentication token using a valid refresh token. The request should succeed.
    """
    authorization_service = AuthorizationService(OAUTH_SETTINGS, Preferences())
    authorization_service.initialize()
    with patch.object(AuthorizationService, "getUserProfile", return_value = UserProfile()):
        authorization_service._storeAuthData(EXPIRED_AUTH_RESPONSE)

    mock_callback = Mock()  # To log the final profile response.
    mock_reply_success = Mock()  # The reply should be a failure when using the expired access token, but succeed when using the refresh token.
    mock_reply_success.error = Mock(return_value = QNetworkReply.NetworkError.NoError)
    mock_reply_failure = Mock()
    mock_reply_failure.error = Mock(return_value = QNetworkReply.NetworkError.AuthenticationRequiredError)
    http_mock = Mock()
    def mock_get(url, headers_dict, callback, error_callback):
        if(headers_dict == {"Authorization": "Bearer beep"}):
            callback(mock_reply_success)
        else:
            callback(mock_reply_failure)
    http_mock.get = mock_get
    http_mock.readJSON = Mock(return_value = {"data": {"user_id": "user_idea", "username": "Ghostkeeper"}})
    def mock_refresh(self, refresh_token, callback):  # Refreshing gives a valid token.
        callback(SUCCESSFUL_AUTH_RESPONSE)

    with patch("cura.OAuth2.AuthorizationHelpers.AuthorizationHelpers.getAccessTokenUsingRefreshToken", mock_refresh):
        with patch("UM.TaskManagement.HttpRequestManager.HttpRequestManager.getInstance", MagicMock(return_value = http_mock)):
            authorization_service._parseJWT(mock_callback)

    mock_callback.assert_called_once()
    profile_reply = mock_callback.call_args_list[0][0][0]
    assert profile_reply.user_id == "user_idea"
    assert profile_reply.username == "Ghostkeeper"

def test_initialize():
    original_preference = MagicMock()
    initialize_preferences = MagicMock()
    authorization_service = AuthorizationService(OAUTH_SETTINGS, original_preference)
    authorization_service.initialize(initialize_preferences)
    initialize_preferences.addPreference.assert_called_once_with("test/auth_data", "{}")
    original_preference.addPreference.assert_not_called()

def test_refreshAccessTokenFailed():
    """
    Test if the authentication is reset once the refresh token fails to refresh access.
    """
    authorization_service = AuthorizationService(OAUTH_SETTINGS, Preferences())
    authorization_service.initialize()

    def mock_refresh(self, refresh_token, callback):  # Refreshing gives a valid token.
        callback(FAILED_AUTH_RESPONSE)
    mock_reply = Mock()  # The response that the request should give, containing an error about it failing to authenticate.
    mock_reply.error = Mock(return_value = QNetworkReply.NetworkError.AuthenticationRequiredError)  # The reply is 403: Authentication required, meaning the server responded with a "Can't do that, Dave".
    http_mock = Mock()
    http_mock.get = lambda url, headers_dict, callback, error_callback: callback(mock_reply)
    http_mock.post = lambda url, data, headers_dict, callback, error_callback: callback(mock_reply)

    with patch("UM.TaskManagement.HttpRequestManager.HttpRequestManager.readJSON", Mock(return_value = {"error_description": "Mock a failed request!"})):
        with patch("UM.TaskManagement.HttpRequestManager.HttpRequestManager.getInstance", MagicMock(return_value = http_mock)):
            authorization_service._storeAuthData(SUCCESSFUL_AUTH_RESPONSE)
            authorization_service.onAuthStateChanged.emit = MagicMock()
            with patch("cura.OAuth2.AuthorizationHelpers.AuthorizationHelpers.getAccessTokenUsingRefreshToken", mock_refresh):
                authorization_service.refreshAccessToken()
                assert authorization_service.onAuthStateChanged.emit.called_with(False)

def test_refreshAccesTokenWithoutData():
    authorization_service = AuthorizationService(OAUTH_SETTINGS, Preferences())
    authorization_service.initialize()
    authorization_service.onAuthStateChanged.emit = MagicMock()
    authorization_service.refreshAccessToken()
    authorization_service.onAuthStateChanged.emit.assert_not_called()

def test_userProfileException():
    authorization_service = AuthorizationService(OAUTH_SETTINGS, Preferences())
    authorization_service.initialize()
    authorization_service._parseJWT = MagicMock(side_effect=requests.exceptions.ConnectionError)
    assert authorization_service.getUserProfile() is None

def test_failedLogin() -> None:
    authorization_service = AuthorizationService(OAUTH_SETTINGS, Preferences())
    authorization_service.onAuthenticationError.emit = MagicMock()
    authorization_service.onAuthStateChanged.emit = MagicMock()
    authorization_service.initialize()

    # Let the service think there was a failed response
    authorization_service._onAuthStateChanged(FAILED_AUTH_RESPONSE)

    # Check that the error signal was triggered
    assert authorization_service.onAuthenticationError.emit.call_count == 1

    # Since nothing changed, this should still be 0.
    assert authorization_service.onAuthStateChanged.emit.call_count == 0

    # Validate that there is no user profile or token
    assert authorization_service.getUserProfile() is None
    assert authorization_service.getAccessToken() is None

@patch.object(AuthorizationService, "getUserProfile", return_value=UserProfile())
def test_storeAuthData(get_user_profile) -> None:
    preferences = Preferences()
    authorization_service = AuthorizationService(OAUTH_SETTINGS, preferences)
    authorization_service.initialize()

    # Write stuff to the preferences.
    authorization_service._storeAuthData(SUCCESSFUL_AUTH_RESPONSE)
    preference_value = preferences.getValue(OAUTH_SETTINGS.AUTH_DATA_PREFERENCE_KEY)
    # Check that something was actually put in the preferences
    assert preference_value is not None and preference_value != {}

    # Create a second auth service, so we can load the data.
    second_auth_service = AuthorizationService(OAUTH_SETTINGS, preferences)
    second_auth_service.initialize()
    second_auth_service.loadAuthDataFromPreferences()
    assert second_auth_service.getAccessToken() == SUCCESSFUL_AUTH_RESPONSE.access_token

@patch.object(LocalAuthorizationServer, "stop")
@patch.object(LocalAuthorizationServer, "start")
@patch.object(QDesktopServices, "openUrl")
def test_localAuthServer(QDesktopServices_openUrl, start_auth_server, stop_auth_server) -> None:
    preferences = Preferences()
    authorization_service = AuthorizationService(OAUTH_SETTINGS, preferences)
    authorization_service.startAuthorizationFlow()
    assert QDesktopServices_openUrl.call_count == 1

    # Ensure that the Authorization service tried to start the server.
    assert start_auth_server.call_count == 1
    assert stop_auth_server.call_count == 0
    authorization_service._onAuthStateChanged(FAILED_AUTH_RESPONSE)

    # Ensure that it stopped the server.
    assert stop_auth_server.call_count == 1

def test_loginAndLogout() -> None:
    preferences = Preferences()
    authorization_service = AuthorizationService(OAUTH_SETTINGS, preferences)
    authorization_service.onAuthenticationError.emit = MagicMock()
    authorization_service.onAuthStateChanged.emit = MagicMock()
    authorization_service.initialize()

    # Let the service think there was a successful response
    with patch.object(AuthorizationHelpers, "parseJWT", return_value=UserProfile()):
        authorization_service._onAuthStateChanged(SUCCESSFUL_AUTH_RESPONSE)

    # Ensure that the error signal was not triggered
    assert authorization_service.onAuthenticationError.emit.call_count == 0

    # Since we said that it went right this time, validate that we got a signal.
    assert authorization_service.onAuthStateChanged.emit.call_count == 1
    assert authorization_service.getUserProfile() is not None
    assert authorization_service.getAccessToken() == "beep"

    # Check that we stored the authentication data, so next time the user won't have to log in again.
    assert preferences.getValue("test/auth_data") is not None

    # We're logged in now, also check if logging out works
    authorization_service.deleteAuthData()
    assert authorization_service.onAuthStateChanged.emit.call_count == 2
    assert authorization_service.getUserProfile() is None

    # Ensure the data is gone after we logged out.
    assert preferences.getValue("test/auth_data") == "{}"

def test_wrongServerResponses() -> None:
    authorization_service = AuthorizationService(OAUTH_SETTINGS, Preferences())
    authorization_service.initialize()
    with patch.object(AuthorizationHelpers, "parseJWT", return_value=UserProfile()):
        authorization_service._onAuthStateChanged(MALFORMED_AUTH_RESPONSE)
    assert authorization_service.getUserProfile() is None

def test__generate_auth_url() -> None:
    preferences = Preferences()
    authorization_service = AuthorizationService(OAUTH_SETTINGS, preferences)
    query_parameters_dict = {
        "client_id": "",
        "redirect_uri": OAUTH_SETTINGS.CALLBACK_URL,
        "scope": OAUTH_SETTINGS.CLIENT_SCOPES,
        "response_type": "code"
    }
    auth_url = authorization_service._generate_auth_url(query_parameters_dict, force_browser_logout = False)
    assert MYCLOUD_LOGOFF_URL + "&next=" not in auth_url

    auth_url = authorization_service._generate_auth_url(query_parameters_dict, force_browser_logout = True)
    assert MYCLOUD_LOGOFF_URL + "&next=" in auth_url