// Copyright 2019 Tetrate Labs
//
// Licensed 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 go2sky_test

import (
	"context"
	"log"
	"time"

	"github.com/tetratelabs/go2sky"
	"github.com/tetratelabs/go2sky/reporter"
)

func ExampleNewTracer() {
	// Use gRPC reporter for production
	r, err := reporter.NewLogReporter()
	if err != nil {
		log.Fatalf("new reporter error %v \n", err)
	}
	defer r.Close()
	tracer, err := go2sky.NewTracer("example", go2sky.WithReporter(r))
	if err != nil {
		log.Fatalf("create tracer error %v \n", err)
	}
	// This for test
	tracer.WaitUntilRegister()
	span, ctx, err := tracer.CreateLocalSpan(context.Background())
	if err != nil {
		log.Fatalf("create new local span error %v \n", err)
	}
	span.SetOperationName("invoke data")
	span.Tag("kind", "outer")
	time.Sleep(time.Second)
	subSpan, _, err := tracer.CreateLocalSpan(ctx)
	if err != nil {
		log.Fatalf("create new sub local span error %v \n", err)
	}
	subSpan.SetOperationName("invoke inner")
	subSpan.Log(time.Now(), "inner", "this is right")
	time.Sleep(time.Second)
	subSpan.End()
	time.Sleep(500 * time.Millisecond)
	span.End()
	time.Sleep(time.Second)
	// Output:
}