package main

import (
	"context"
	"fmt"
	"os"
	"time"

	nixmsg "git.asio.asia/nixevol/NixMsg/sdk/go"
)

func main() {
	url := env("NIXMSG_URL", "ws://127.0.0.1:7443/mqtt")
	id := env("NIXMSG_ID", "device-1")
	pass := env("NIXMSG_PASSWORD", "secret")
	peer := env("NIXMSG_PEER", "device-2")

	c := nixmsg.New()
	c.OnSession(func(tok string) {
		fmt.Println("session", tok)
	})
	c.OnMessage(func(msg nixmsg.Message) error {
		fmt.Println("msg", msg.From, msg.Body.Data)
		return nil
	})
	c.OnConnection(func(ev nixmsg.ConnectionEvent) {
		fmt.Println("conn", ev.State, ev.Reason)
	})

	ctx := context.Background()
	if err := c.Connect(ctx, url, id, nixmsg.Credential{Password: pass}, nixmsg.Options{}); err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
	defer c.Close()

	delay := time.Duration(0)
	res, err := c.Send(ctx, nixmsg.Target{Kind: "endpoint", ID: peer},
		nixmsg.Body{Enc: "utf8", Data: "hello from go sdk"}, nixmsg.SendOptions{Delay: &delay})
	if err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
	fmt.Println("sent", res.ID, res.State)
	time.Sleep(2 * time.Second)
}

func env(k, def string) string {
	if v := os.Getenv(k); v != "" {
		return v
	}
	return def
}