package main

import (
	"fmt"
	"os"
	"time"

	"git.milar.in/milarin/adverr"
	"git.milar.in/milarin/envvars/v2"
	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
)

var (
	MdstatFile   = envvars.String("MDSTAT_FILE", "/proc/mdstat")
	PollInterval = envvars.Duration("POLL_INTERVAL", time.Minute)
	BotToken     = envvars.String("TELEGRAM_API_TOKEN", "")
	ChatID       = envvars.Int64("TELEGRAM_CHAT_ID", 0)
)

func main() {
	if BotToken == "" {
		fmt.Fprintln(os.Stderr, "$TELEGRAM_API_TOKEN not set")
		os.Exit(1)
	}

	if ChatID == 0 {
		fmt.Fprintln(os.Stderr, "$TELEGRAM_CHAT_ID not set")
		os.Exit(1)
	}

	bot, err := tgbotapi.NewBotAPI(BotToken)
	if err != nil {
		adverr.Fatalln(err, 1)
	}

	for state := range filterChanges(mdstat(MdstatFile, PollInterval)) {
		str := state.String()
		fmt.Println(str)
		message := tgbotapi.NewMessage(ChatID, fmt.Sprintf("Der Zustand des RAID Systems %s hat sich verändert:\n\n%s", state.Name, str))
		message.Entities = append(message.Entities, tgbotapi.MessageEntity{
			Type:   "code",
			Offset: len("Der Zustand des RAID Systems %s hat sich verändert:\n\n"),
			Length: len(str),
		})
		if _, err := bot.Send(message); err != nil {
			adverr.Println(err)
		}
	}
}