package opentelemetry

import (
	"context"

	"go.opentelemetry.io/otel/attribute"
	"go.opentelemetry.io/otel/sdk/resource"
	semconv "go.opentelemetry.io/otel/semconv/v1.24.0"

	extConfig "go-admin/config"
)

func Setup() {
	// Create resource.
	res, err := newResource()
	if err != nil {
		panic(err)
	}

	initMeter(res)
	initTracer(res)

	// Handle shutdown properly so nothing leaks.
	// defer func() {
	// 	if err := meterProvider.Shutdown(context.Background()); err != nil {
	// 		log.Println(err)
	// 	}
	// }()
}

func newResource() (res *resource.Resource, err error) {
	res = resource.Default()
	extres, _ := resource.New(
		context.TODO(),
		resource.WithHost(),
		resource.WithOS(),
		resource.WithProcess(),
		resource.WithContainer(),
	)
	res, err = resource.Merge(res, extres)
	com := extConfig.ExtConfig.Otel.Common
	serviceName := com.ServiceName
	serviceVersion := com.ServiceVersion
	if serviceName != "" && serviceVersion != "" {
		res, err = resource.Merge(res, resource.NewWithAttributes(
			semconv.SchemaURL,
			semconv.ServiceName(serviceName),
			semconv.ServiceVersion(serviceVersion),
			semconv.ProcessCommandLine("-DAPP_NAME=OBSERVE"), // 从这里固定commandline，用于applias解析；golang从不能从命令行直接写
			attribute.String("app.name", "OBSERVE"),
		))
	}
	return
}