package main

import (
	"fmt"
	"github.com/nats-io/nats.go"
	"runtime"
	"strings"
)

func newConn(svr string) (*nats.Conn, error) {
	options := nats.GetDefaultOptions()
	//options.Url = nats.DefaultURL

	_, file, _, _ := runtime.Caller(0)
	fileDirs := strings.Split(file, "/")
	name := strings.Split(fileDirs[len(fileDirs) - 1], ".")[0]
	options.Name = name


	servers := strings.Split(svr, ",")
	options.Servers = servers
	options.MaxReconnect = nats.DefaultMaxReconnect
	options.ReconnectWait = nats.DefaultReconnectWait
	options.Timeout = nats.DefaultTimeout

	if conn, err := options.Connect(); err != nil {
		return nil, err
	} else {
		return conn, nil
	}
}

func newStream(streamName string, conn *nats.Conn) (js nats.JetStreamContext, err error) {
	js, err = conn.JetStream()
	if err != nil {
		return nil, fmt.Errorf("new jetstream error: %v", err)
	}
	stream, _ := js.StreamInfo(streamName)
	if stream == nil {
		_, err := js.AddStream(&nats.StreamConfig{
			Name:     streamName,
			Subjects: []string{streamName + ".>"},
		})
		if err != nil {
			return nil, fmt.Errorf("new stream '%s' error: %v", streamName, err)
		}
	}

	return js, nil
}