import asyncio
from types import SimpleNamespace
from unittest.mock import Mock

import pytest

from aiohttp.tracing import (Trace, TraceConfig,
                             TraceConnectionCreateEndParams,
                             TraceConnectionCreateStartParams,
                             TraceConnectionQueuedEndParams,
                             TraceConnectionQueuedStartParams,
                             TraceConnectionReuseconnParams,
                             TraceDnsCacheHitParams, TraceDnsCacheMissParams,
                             TraceDnsResolveHostEndParams,
                             TraceDnsResolveHostStartParams,
                             TraceRequestEndParams,
                             TraceRequestExceptionParams,
                             TraceRequestRedirectParams,
                             TraceRequestStartParams)


class TestTraceConfig:

    def test_trace_config_ctx_default(self):
        trace_config = TraceConfig()
        assert isinstance(trace_config.trace_config_ctx(), SimpleNamespace)

    def test_trace_config_ctx_factory(self):
        trace_config = TraceConfig(trace_config_ctx_factory=dict)
        assert isinstance(trace_config.trace_config_ctx(), dict)

    def test_trace_config_ctx_request_ctx(self):
        trace_request_ctx = Mock()
        trace_config = TraceConfig()
        trace_config_ctx = trace_config.trace_config_ctx(
            trace_request_ctx=trace_request_ctx)
        assert trace_config_ctx.trace_request_ctx is trace_request_ctx

    def test_freeze(self):
        trace_config = TraceConfig()
        trace_config.freeze()

        assert trace_config.on_request_start.frozen
        assert trace_config.on_request_end.frozen
        assert trace_config.on_request_exception.frozen
        assert trace_config.on_request_redirect.frozen
        assert trace_config.on_connection_queued_start.frozen
        assert trace_config.on_connection_queued_end.frozen
        assert trace_config.on_connection_create_start.frozen
        assert trace_config.on_connection_create_end.frozen
        assert trace_config.on_connection_reuseconn.frozen
        assert trace_config.on_dns_resolvehost_start.frozen
        assert trace_config.on_dns_resolvehost_end.frozen
        assert trace_config.on_dns_cache_hit.frozen
        assert trace_config.on_dns_cache_miss.frozen


class TestTrace:

    @pytest.mark.parametrize('signal,params,param_obj', [
        (
            'request_start',
            (Mock(), Mock(), Mock()),
            TraceRequestStartParams
        ),
        (
            'request_end',
            (Mock(), Mock(), Mock(), Mock()),
            TraceRequestEndParams
        ),
        (
            'request_exception',
            (Mock(), Mock(), Mock(), Mock()),
            TraceRequestExceptionParams
        ),
        (
            'request_redirect',
            (Mock(), Mock(), Mock(), Mock()),
            TraceRequestRedirectParams
        ),
        (
            'connection_queued_start',
            (),
            TraceConnectionQueuedStartParams
        ),
        (
            'connection_queued_end',
            (),
            TraceConnectionQueuedEndParams
        ),
        (
            'connection_create_start',
            (),
            TraceConnectionCreateStartParams
        ),
        (
            'connection_create_end',
            (),
            TraceConnectionCreateEndParams
        ),
        (
            'connection_reuseconn',
            (),
            TraceConnectionReuseconnParams
        ),
        (
            'dns_resolvehost_start',
            (Mock(),),
            TraceDnsResolveHostStartParams
        ),
        (
            'dns_resolvehost_end',
            (Mock(),),
            TraceDnsResolveHostEndParams
        ),
        (
            'dns_cache_hit',
            (Mock(),),
            TraceDnsCacheHitParams
        ),
        (
            'dns_cache_miss',
            (Mock(),),
            TraceDnsCacheMissParams
        )
    ])
    async def test_send(self, loop, signal, params, param_obj):
        session = Mock()
        trace_request_ctx = Mock()
        callback = Mock(side_effect=asyncio.coroutine(Mock()))

        trace_config = TraceConfig()
        getattr(trace_config, "on_%s" % signal).append(callback)
        trace_config.freeze()
        trace = Trace(
            session,
            trace_config,
            trace_config.trace_config_ctx(trace_request_ctx=trace_request_ctx)
        )
        await getattr(trace, "send_%s" % signal)(*params)

        callback.assert_called_once_with(
            session,
            SimpleNamespace(trace_request_ctx=trace_request_ctx),
            param_obj(*params)
        )
