// Licensed to 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. Apache Software Foundation (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 router

import (
	"testing"
	"time"

	"github.com/valyala/fasthttp"

	"github.com/apache/skywalking-go/plugins/core"
	"github.com/apache/skywalking-go/plugins/core/operator"

	"github.com/stretchr/testify/assert"
)

func TestServerInvoke(t *testing.T) {
	defer core.ResetTracingContext()
	interceptor := &ServerInterceptor{}

	req := fasthttp.AcquireRequest()
	req.Header.SetMethod("GET")
	req.SetRequestURI("http://localhost/test")
	defer func() {
		fasthttp.ReleaseRequest(req)
	}()

	ctx := &fasthttp.RequestCtx{}
	ctx.Init(req, nil, nil)
	ctx.Response.SetStatusCode(200)

	assert.NotNil(t, ctx, "RequestCtx should not be nil")
	invocation := operator.NewInvocation(nil, ctx)
	err := interceptor.BeforeInvoke(invocation)
	assert.Nil(t, err, "before invoke error should be nil")
	assert.NotNil(t, invocation.GetContext(), "context should not be nil")

	time.Sleep(100 * time.Millisecond)
	err = interceptor.AfterInvoke(invocation)
	assert.Nil(t, err, "after invoke error should be nil")

	time.Sleep(100 * time.Millisecond)
	spans := core.GetReportedSpans()
	assert.NotNil(t, spans, "spans should not be nil")
	assert.Equal(t, 1, len(spans), "spans length should be 1")
	assert.Equal(t, "GET:http://localhost/test", spans[0].OperationName(), "operation name should be GET:http://localhost/test")
	assert.Equal(t, "Http", spans[0].SpanLayer().String(), "SpanLayer should be Http")
	assert.Equal(t, int32(5020), spans[0].ComponentID(), "ComponentID should be 5020")
	assert.Nil(t, spans[0].Refs(), "refs should be nil")
	assert.Greater(t, spans[0].EndTime(), spans[0].StartTime(), "end time should be greater than start time")
}