package main

import (
	"os"
	"fmt"
	"net"
	"flag"
	"strings"
	"strconv"

	"github.com/probakowski/go-satel"
	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
)

func main() {
	satel_api_addr := flag.String("satel_addr", "", "Address that should be used to connect to the SATEL device")
	satel_api_port := flag.String("satel_port", "7094", "Port that should be used to connect to the SATEL device")
	chat_id_raw := flag.String("tg_chat_id", "", "Telegram Chat ID where to send updates. Use \",\" to specify multiple IDs.")
	flag.Parse()

	if len(*satel_api_addr) == 0 || len(*satel_api_port) == 0 || len(*chat_id_raw) == 0 {
		fmt.Println("Use --satel_addr=ADDR, --satel_port=PORT and --tg_chat_id=CHAT_ID command line flags to continue.")
		os.Exit(1)
	}
	chat_ids_strings := strings.Split(*chat_id_raw, ",")
	var chat_ids []int64
	for _, chat_id_str := range chat_ids_strings {
		chat_id, err := strconv.ParseInt(chat_id_str, 10, 64)
		if err != nil {
			fmt.Printf("Tried to use a non-int value for one of tg_chat_ids: %s. That's bad.", chat_id_str)
			os.Exit(1)
		}
		chat_ids = append(chat_ids, chat_id)
	}

	satel_addr := fmt.Sprintf("%s:%s", *satel_api_addr, *satel_api_port)
	satel_conn, err := net.Dial("tcp", satel_addr)
	if err != nil {
		panic(err)
	}
	s := satel.NewConfig(satel_conn, satel.Config{EventsQueueSize: 1000})
	bot, err := tgbotapi.NewBotAPI(os.Getenv("TELEGRAM_APITOKEN"))
    if err != nil {
        panic(err)
    }

	for e, ok := <-s.Events; ok; e, ok = <-s.Events {
	    fmt.Println("Change from SATEL: ", "type", e.Type, "index", e.Index, "value", e.Value)
	    for _, chat_id := range chat_ids {
		    msg := tgbotapi.NewMessage(chat_id, fmt.Sprintf("Change from SATEL: Zone: %d Type: %s Value: %t",
		    	e.Index, e.Type, e.Value))

		    if _, err := bot.Send(msg); err != nil {
		    	// TODO: retry sending later in case of problems
	            panic(err)
	        }
	    }
	}
}