from contextlib import contextmanager
from io import StringIO
from unittest.mock import Mock

import pytest
from vine.abstract import Thenable

from kombu.asynchronous import http
from kombu.asynchronous.aws.connection import (AsyncAWSQueryConnection,
                                               AsyncConnection,
                                               AsyncHTTPResponse,
                                               AsyncHTTPSConnection)
from kombu.asynchronous.aws.ext import boto3
from kombu.exceptions import HttpError
from t.mocks import PromiseMock

from .case import AWSCase

try:
    from urllib.parse import parse_qs, urlparse
except ImportError:
    from urlparse import parse_qs, urlparse

# Not currently working
VALIDATES_CERT = False


def passthrough(*args, **kwargs):
    m = Mock(*args, **kwargs)

    def side_effect(ret):
        return ret
    m.side_effect = side_effect
    return m


class test_AsyncHTTPSConnection(AWSCase):

    def test_http_client(self):
        x = AsyncHTTPSConnection()
        assert x.http_client is http.get_client()
        client = Mock(name='http_client')
        y = AsyncHTTPSConnection(http_client=client)
        assert y.http_client is client

    def test_args(self):
        x = AsyncHTTPSConnection(
            strict=True, timeout=33.3,
        )
        assert x.strict
        assert x.timeout == 33.3

    def test_request(self):
        x = AsyncHTTPSConnection('aws.vandelay.com')
        x.request('PUT', '/importer-exporter')
        assert x.path == '/importer-exporter'
        assert x.method == 'PUT'

    def test_request_with_body_buffer(self):
        x = AsyncHTTPSConnection('aws.vandelay.com')
        body = Mock(name='body')
        body.read.return_value = 'Vandelay Industries'
        x.request('PUT', '/importer-exporter', body)
        assert x.method == 'PUT'
        assert x.path == '/importer-exporter'
        assert x.body == 'Vandelay Industries'
        body.read.assert_called_with()

    def test_request_with_body_text(self):
        x = AsyncHTTPSConnection('aws.vandelay.com')
        x.request('PUT', '/importer-exporter', 'Vandelay Industries')
        assert x.method == 'PUT'
        assert x.path == '/importer-exporter'
        assert x.body == 'Vandelay Industries'

    def test_request_with_headers(self):
        x = AsyncHTTPSConnection()
        headers = {'Proxy': 'proxy.vandelay.com'}
        x.request('PUT', '/importer-exporter', None, headers)
        assert 'Proxy' in dict(x.headers)
        assert dict(x.headers)['Proxy'] == 'proxy.vandelay.com'

    def assert_request_created_with(self, url, conn):
        conn.Request.assert_called_with(
            url, method=conn.method,
            headers=http.Headers(conn.headers), body=conn.body,
            connect_timeout=conn.timeout, request_timeout=conn.timeout,
            validate_cert=VALIDATES_CERT,
        )

    def test_getresponse(self):
        client = Mock(name='client')
        client.add_request = passthrough(name='client.add_request')
        x = AsyncHTTPSConnection(http_client=client)
        x.Response = Mock(name='x.Response')
        request = x.getresponse()
        x.http_client.add_request.assert_called_with(request)
        assert isinstance(request, Thenable)
        assert isinstance(request.on_ready, Thenable)

        response = Mock(name='Response')
        request.on_ready(response)
        x.Response.assert_called_with(response)

    def test_getresponse__real_response(self):
        client = Mock(name='client')
        client.add_request = passthrough(name='client.add_request')
        callback = PromiseMock(name='callback')
        x = AsyncHTTPSConnection(http_client=client)
        request = x.getresponse(callback)
        x.http_client.add_request.assert_called_with(request)

        buf = StringIO()
        buf.write('The quick brown fox jumps')

        headers = http.Headers({'X-Foo': 'Hello', 'X-Bar': 'World'})

        response = http.Response(request, 200, headers, buf)
        request.on_ready(response)
        callback.assert_called()
        wresponse = callback.call_args[0][0]

        assert wresponse.read() == 'The quick brown fox jumps'
        assert wresponse.status == 200
        assert wresponse.getheader('X-Foo') == 'Hello'
        headers_dict = wresponse.getheaders()
        assert dict(headers_dict) == headers
        assert wresponse.msg
        assert repr(wresponse)

    def test_repr(self):
        assert repr(AsyncHTTPSConnection())

    def test_putrequest(self):
        x = AsyncHTTPSConnection()
        x.putrequest('UPLOAD', '/new')
        assert x.method == 'UPLOAD'
        assert x.path == '/new'

    def test_putheader(self):
        x = AsyncHTTPSConnection()
        x.putheader('X-Foo', 'bar')
        assert x.headers == [('X-Foo', 'bar')]
        x.putheader('X-Bar', 'baz')
        assert x.headers == [
            ('X-Foo', 'bar'),
            ('X-Bar', 'baz'),
        ]

    def test_send(self):
        x = AsyncHTTPSConnection()
        x.send('foo')
        assert x.body == 'foo'
        x.send('bar')
        assert x.body == 'foobar'

    def test_interface(self):
        x = AsyncHTTPSConnection()
        assert x.set_debuglevel(3) is None
        assert x.connect() is None
        assert x.close() is None
        assert x.endheaders() is None


class test_AsyncHTTPResponse(AWSCase):

    def test_with_error(self):
        r = Mock(name='response')
        r.error = HttpError(404, 'NotFound')
        x = AsyncHTTPResponse(r)
        assert x.reason == 'NotFound'

        r.error = None
        assert not x.reason


class test_AsyncConnection(AWSCase):

    def test_client(self):
        sqs = Mock(name='sqs')
        x = AsyncConnection(sqs)
        assert x._httpclient is http.get_client()
        client = Mock(name='client')
        y = AsyncConnection(sqs, http_client=client)
        assert y._httpclient is client

    def test_get_http_connection(self):
        sqs = Mock(name='sqs')
        x = AsyncConnection(sqs)
        assert isinstance(
            x.get_http_connection(),
            AsyncHTTPSConnection,
        )
        conn = x.get_http_connection()
        assert conn.http_client is x._httpclient


class test_AsyncAWSQueryConnection(AWSCase):

    def setup(self):
        session = boto3.session.Session(
            aws_access_key_id='AAA',
            aws_secret_access_key='AAAA',
            region_name='us-west-2',
        )
        sqs_client = session.client('sqs')
        self.x = AsyncAWSQueryConnection(sqs_client,
                                         http_client=Mock(name='client'))

    def test_make_request(self):
        _mexe, self.x._mexe = self.x._mexe, Mock(name='_mexe')
        Conn = self.x.get_http_connection = Mock(name='get_http_connection')
        callback = PromiseMock(name='callback')
        self.x.make_request(
            'action', {'foo': 1}, 'https://foo.com/', 'GET', callback=callback,
        )
        self.x._mexe.assert_called()
        request = self.x._mexe.call_args[0][0]
        parsed = urlparse(request.url)
        params = parse_qs(parsed.query)
        assert params['Action'][0] == 'action'

        ret = _mexe(request, callback=callback)
        assert ret is callback
        Conn.return_value.request.assert_called()
        Conn.return_value.getresponse.assert_called_with(
            callback=callback,
        )

    def test_make_request__no_action(self):
        self.x._mexe = Mock(name='_mexe')
        self.x.get_http_connection = Mock(name='get_http_connection')
        callback = PromiseMock(name='callback')
        self.x.make_request(
            None, {'foo': 1}, 'http://foo.com/', 'GET', callback=callback,
        )
        self.x._mexe.assert_called()
        request = self.x._mexe.call_args[0][0]
        parsed = urlparse(request.url)
        params = parse_qs(parsed.query)
        assert 'Action' not in params

    @pytest.mark.parametrize('error_status_code', [
        AsyncAWSQueryConnection.STATUS_CODE_REQUEST_TIMEOUT,
        AsyncAWSQueryConnection.STATUS_CODE_NETWORK_CONNECT_TIMEOUT_ERROR,
        AsyncAWSQueryConnection.STATUS_CODE_INTERNAL_ERROR,
        AsyncAWSQueryConnection.STATUS_CODE_BAD_GATEWAY,
        AsyncAWSQueryConnection.STATUS_CODE_SERVICE_UNAVAILABLE_ERROR,
        AsyncAWSQueryConnection.STATUS_CODE_GATEWAY_TIMEOUT
    ])
    def test_on_list_ready_error_response(self, error_status_code):
        mocked_response_error = self.Response(
            error_status_code,
            "error_status_code"
        )
        result = self.x._on_list_ready(
            "parent",
            "markers",
            "operation",
            mocked_response_error
        )
        assert result == []

    def Response(self, status, body):
        r = Mock(name='response')
        r.status = status
        r.read.return_value = body
        return r

    @contextmanager
    def mock_make_request(self):
        self.x.make_request = Mock(name='make_request')
        callback = PromiseMock(name='callback')
        yield callback

    def assert_make_request_called(self):
        self.x.make_request.assert_called()
        return self.x.make_request.call_args[1]['callback']
