package telegram

import (
	"fmt"
	"log/slog"
	"strings"

	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
	"github.com/s32x/httpclient"
)

type TG struct {
	api         *tgbotapi.BotAPI
	video_links chan string
	logger      *slog.Logger
	chat_id     int64
}

func New(logger *slog.Logger, api_key string, chat_id int64, video_links chan string) (*TG, error) {
	const op = "telegram.New"
	bot, err := tgbotapi.NewBotAPI(api_key)
	if err != nil {
		return nil, fmt.Errorf("%s: %w", op, err)
	}

	bot.Debug = false

	u := tgbotapi.NewUpdate(0)
	u.Timeout = 60

	return &TG{
		api:         bot,
		video_links: video_links,
		logger:      logger,
		chat_id:     chat_id,
	}, nil
}

func (tg *TG) Run(count int) {
	for i := 0; i < count; i++ {
		go tg.new_tg_worker(i + 1)
	}
}

const PCUserAgent string = "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36"
const MobileUserAgent string = "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Mobile Safari/537.36"

func (tg *TG) new_tg_worker(id int) {
	for link := range tg.video_links {
		tg.logger.Info(fmt.Sprintf("[%d]", id), "Получена ссылка, загружаю:", link)
		// get video by link
		var client *httpclient.Client
		if strings.Contains(link, "VK_ANDROID") {
			// create mobile client
			client = httpclient.New().WithHeader("User-Agent", MobileUserAgent)
		} else {
			// create Desktop client
			client = httpclient.New().WithHeader("User-Agent", PCUserAgent)
		}

		resp, err := client.Get(link).Do()
		if err != nil {
			tg.logger.Error("Error with get media", "err", err)
			continue
		}
		body, err := resp.Bytes()
		if err != nil {
			tg.logger.Error("Error with get body", "err", err)
			continue
		}
		msg := tgbotapi.NewVideo(tg.chat_id, tgbotapi.FileBytes{Name: "story", Bytes: body})
		tg.logger.Info(fmt.Sprintf("[%d] Отправляю видео в телеграм...", id))
		_, err = tg.api.Send(msg)
		if err != nil {
			tg.logger.Error("Error with send message", "err", err)
			continue
		}
	}
}