package main

import (
	"log/slog"
	"net/http"
	"os"

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

	"worktimeBot/internal/bot"
)

// startWebhook registers the webhook with Telegram and starts the HTTPS/HTTP listener loop.
func startWebhook(botAPI *tgbotapi.BotAPI, handler *bot.Handler, webhookURL string) {
	if _, err := botAPI.Request(tgbotapi.DeleteWebhookConfig{}); err != nil {
		slog.Error("delete webhook", "error", err)
		os.Exit(1)
	}

	wh, err := tgbotapi.NewWebhook(webhookURL)
	if err != nil {
		slog.Error("new webhook", "error", err)
		os.Exit(1)
	}
	if _, err := botAPI.Request(wh); err != nil {
		slog.Error("set webhook", "error", err)
		os.Exit(1)
	}

	updates := botAPI.ListenForWebhook("/webhook")

	listenAddr := getEnvDefault("BOT_LISTEN", ":8080")
	tlsCert := os.Getenv("BOT_TLS_CERT")
	tlsKey := os.Getenv("BOT_TLS_KEY")

	if tlsCert != "" && tlsKey != "" {
		slog.Info("starting HTTPS webhook", "addr", listenAddr)
		go func() {
			if err := http.ListenAndServeTLS(listenAddr, tlsCert, tlsKey, nil); err != nil {
				slog.Error("HTTPS server", "error", err)
				os.Exit(1)
			}
		}()
	} else {
		slog.Info("starting HTTP webhook (TLS by reverse proxy)", "addr", listenAddr)
		go func() {
			if err := http.ListenAndServe(listenAddr, nil); err != nil {
				slog.Error("HTTP server", "error", err)
				os.Exit(1)
			}
		}()
	}

	slog.Info("webhook registered", "url", webhookURL)

	for update := range updates {
		if update.Message != nil {
			handler.HandleMessage(update)
		}
		if update.CallbackQuery != nil {
			handler.HandleCallback(update)
		}
	}
}