/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package filter_impl

import (
	"context"
	"sync"
	"testing"
	"time"
)

import (
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/mock"
)

import (
	"github.com/apache/dubbo-go/common"
	"github.com/apache/dubbo-go/common/extension"
	"github.com/apache/dubbo-go/config"
	"github.com/apache/dubbo-go/metrics"
	"github.com/apache/dubbo-go/protocol"
	"github.com/apache/dubbo-go/protocol/invocation"
)

func TestMetricsFilter_Invoke(t *testing.T) {

	// prepare the mock reporter
	config.GetMetricConfig().Reporters = []string{"mock"}
	mk := &mockReporter{}
	extension.SetMetricReporter("mock", func() metrics.Reporter {
		return mk
	})

	instance := extension.GetFilter(metricFilterName)

	url, _ := common.NewURL(
		"dubbo://:20000/UserProvider?app.version=0.0.1&application=BDTService&bean.name=UserProvider" +
			"&cluster=failover&environment=dev&group=&interface=com.ikurento.user.UserProvider&loadbalance=random&methods.GetUser." +
			"loadbalance=random&methods.GetUser.retries=1&methods.GetUser.weight=0&module=dubbogo+user-info+server&name=" +
			"BDTService&organization=ikurento.com&owner=ZX&registry.role=3&retries=&" +
			"service.filter=echo%2Ctoken%2Caccesslog&timestamp=1569153406&token=934804bf-b007-4174-94eb-96e3e1d60cc7&version=&warmup=100")
	invoker := protocol.NewBaseInvoker(url)

	attach := make(map[string]string, 10)
	inv := invocation.NewRPCInvocation("MethodName", []interface{}{"OK", "Hello"}, attach)

	ctx := context.Background()

	mk.On("Report", ctx, invoker, inv).Return(true, nil)

	mk.wg.Add(1)
	result := instance.Invoke(ctx, invoker, inv)
	assert.NotNil(t, result)
	mk.AssertNotCalled(t, "Report", 1)
	// it will do nothing
	result = instance.OnResponse(ctx, nil, invoker, inv)
	assert.Nil(t, result)
}

type mockReporter struct {
	mock.Mock
	wg sync.WaitGroup
}

func (m *mockReporter) Report(ctx context.Context, invoker protocol.Invoker, invocation protocol.Invocation, cost time.Duration, res protocol.Result) {
	m.Called(ctx, invoker, invocation)
	m.wg.Done()
}