package tracing

import (
	"context"

	"github.com/spf13/viper"
	"go.opentelemetry.io/contrib/bridges/otelzap"
	"go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc"
	"go.opentelemetry.io/otel/sdk/log"
	"go.opentelemetry.io/otel/trace"
	"go.uber.org/zap"
)

var (
	Provider *log.LoggerProvider
	Tracer   trace.Tracer
	Logger   *zap.Logger

	version string = "0.0.1-alpha"
)

func InitTracer(appname string) {
	ctx := context.Background()
	exp, err := otlploggrpc.New(ctx,
		otlploggrpc.WithInsecure(),
		otlploggrpc.WithEndpoint(viper.GetString("otel-endpoint")))
	if err != nil {
		panic(err)
	}

	Provider = log.NewLoggerProvider(
		log.WithProcessor(log.NewBatchProcessor(exp)))
	otelCore := otelzap.NewCore(appname,
		otelzap.WithLoggerProvider(Provider))

	Logger = zap.New(otelCore, zap.AddCaller())
}

func DeferTracer() {
	Logger.Sync()
	Provider.Shutdown(context.Background())
}