# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License.

import os
import base64
import asyncio
import pytest

import msrest
from botbuilder.schema import AttachmentData, ErrorResponseException
from botframework.connector.aio import ConnectorClient
from botframework.connector.auth import MicrosoftAppCredentials

from authentication_stub import MicrosoftTokenAuthenticationStub

SERVICE_URL = "https://slack.botframework.com"
CHANNEL_ID = "slack"
BOT_NAME = "botbuilder-pc-bot"
BOT_ID = "B21UTEF8S:T03CWQ0QB"
RECIPIENT_ID = "U19KH8EHJ:T03CWQ0QB"
CONVERSATION_ID = "B21UTEF8S:T03CWQ0QB:D2369CT7C"


async def get_auth_token():
    try:
        # pylint: disable=import-outside-toplevel
        from .app_creds_real import MICROSOFT_APP_ID, MICROSOFT_APP_PASSWORD

        # Define a "app_creds_real.py" file with your bot credentials as follows:
        # MICROSOFT_APP_ID = '...'
        # MICROSOFT_APP_PASSWORD = '...'
        return MicrosoftAppCredentials(
            MICROSOFT_APP_ID, MICROSOFT_APP_PASSWORD
        ).get_access_token()
    except ImportError:
        return "STUB_ACCESS_TOKEN"


def read_base64(path_to_file):
    path_to_current_file = os.path.realpath(__file__)
    current_directory = os.path.dirname(path_to_current_file)
    path_to_file = os.path.join(current_directory, "resources", path_to_file)

    with open(path_to_file, "rb") as image_file:
        encoded_string = base64.b64encode(image_file.read())
        return encoded_string


async def return_sum(attachment_stream):
    counter = 0
    async for _ in attachment_stream:
        counter += len(_)
    return counter


LOOP = asyncio.get_event_loop()
AUTH_TOKEN = LOOP.run_until_complete(get_auth_token())


class AttachmentsTest:
    def __init__(self):
        super(AttachmentsTest, self).__init__()
        self.loop = asyncio.get_event_loop()

    @property
    def credentials(self):
        return MicrosoftTokenAuthenticationStub(AUTH_TOKEN)

    def test_attachments_upload_and_get_attachment(self):
        attachment = AttachmentData(
            type="image/png",
            name="Bot.png",
            original_base64=read_base64("bot.png"),
            thumbnail_base64=read_base64("bot_icon.png"),
        )

        connector = ConnectorClient(self.credentials, base_url=SERVICE_URL)
        response = self.loop.run_until_complete(
            connector.conversations.upload_attachment(CONVERSATION_ID, attachment)
        )
        attachment_id = response.id
        attachment_info = self.loop.run_until_complete(
            connector.attachments.get_attachment_info(attachment_id)
        )

        assert attachment_info is not None
        assert attachment_info.name == "Bot.png"
        assert attachment_info.type == "image/png"
        assert len(attachment_info.views) == 2

    def test_attachments_get_info_invalid_attachment_id_fails(self):
        with pytest.raises(ErrorResponseException) as excinfo:
            connector = ConnectorClient(self.credentials, base_url=SERVICE_URL)
            self.loop.run_until_complete(
                connector.attachments.get_attachment_info("bt13796-GJS4yaxDLI")
            )

        assert "Not Found" in str(excinfo.value)

    def test_attachments_get_attachment_view(self):
        original = read_base64("bot.png")
        attachment = AttachmentData(
            type="image/png",
            name="Bot.png",
            original_base64=original,
            thumbnail_base64=read_base64("bot_icon.png"),
        )

        connector = ConnectorClient(self.credentials, base_url=SERVICE_URL)
        response = self.loop.run_until_complete(
            connector.conversations.upload_attachment(CONVERSATION_ID, attachment)
        )
        attachment_id = response.id
        attachment_stream = self.loop.run_until_complete(
            connector.attachments.get_attachment(attachment_id, "original")
        )

        assert len(original) == self.loop.run_until_complete(
            return_sum(attachment_stream)
        )

    def test_attachments_get_attachment_view_with_invalid_attachment_id_fails(self):
        with pytest.raises(msrest.exceptions.HttpOperationError) as excinfo:
            connector = ConnectorClient(self.credentials, base_url=SERVICE_URL)
            self.loop.run_until_complete(
                connector.attachments.get_attachment("bt13796-GJS4yaxDLI", "original")
            )

        assert "Not Found" in str(excinfo.value)

    def test_attachments_get_attachment_view_with_invalid_view_id_fails(self):
        original = read_base64("bot.png")
        attachment = AttachmentData(
            type="image/png",
            name="Bot.png",
            original_base64=original,
            thumbnail_base64=read_base64("bot_icon.png"),
        )

        with pytest.raises(msrest.exceptions.HttpOperationError) as excinfo:
            connector = ConnectorClient(self.credentials, base_url=SERVICE_URL)
            response = self.loop.run_until_complete(
                connector.conversations.upload_attachment(CONVERSATION_ID, attachment)
            )
            attachment_id = response.id
            self.loop.run_until_complete(
                connector.attachments.get_attachment(attachment_id, "invalid")
            )

        assert "not found" in str(excinfo.value)