package main

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

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

	"worktimeBot/internal/bot"
	"worktimeBot/internal/db"
	"worktimeBot/pkg/i18n"
)

func main() {
	// Load .env file if it exists (ignored when running inside Docker with env vars)
	_ = godotenv.Load()

	token := os.Getenv("BOT_TOKEN")
	proxyURL := os.Getenv("HTTP_PROXY")
	dbPath := getEnvDefault("DB_PATH", "db.sqlite3")

	// Build HTTP client with optional proxy
	var httpClient *http.Client
	if proxyURL != "" {
		parsed, err := url.Parse(proxyURL)
		if err != nil {
			log.Fatal(err)
		}
		tr := &http.Transport{Proxy: http.ProxyURL(parsed)}
		httpClient = &http.Client{Transport: tr}
	} else {
		httpClient = http.DefaultClient
	}

	botAPI, err := tgbotapi.NewBotAPIWithClient(token, "", httpClient)
	if err != nil {
		log.Fatal(err)
	}

	dbStore, err := db.NewStore(dbPath)
	if err != nil {
		log.Fatal(err)
	}

	translator, _ := i18n.NewTranslator("en")

	handler := bot.NewHandler(botAPI, dbStore, translator)

	webhookURL := os.Getenv("BOT_WEBHOOK_URL")
	if webhookURL != "" {
		startWebhook(botAPI, handler, webhookURL)
	} else {
		// Fallback to long‑polling
		u := tgbotapi.NewUpdate(0)
		u.Timeout = 30
		updates := botAPI.GetUpdatesChan(u)
		for update := range updates {
			if update.Message != nil {
				handler.HandleMessage(update)
			}
		}
	}
}

func getEnvDefault(key, defaultValue string) string {
	if val := os.Getenv(key); val != "" {
		return val
	}
	return defaultValue
}