package app

import (
	"io"

	"go.balki.me/tss/log"
	"go.balki.me/tss/proxy"
)

func Run(configPath string) {
	cfg, err := ParseConfig(configPath)

	if err != nil {
		log.Panic("failed to parse config", "path", configPath, "err", err)
	}

	scheduler, err := NewScheduler(cfg.LastSuccessPath)

	defer func() {
		if err := scheduler.Save(); err != nil {
			log.Panic("failed to save last success info", "path", cfg.LastSuccessPath, "err", err)
		}
	}()

	// tgram := NewTelegramSender(cfg.TelegramProxy)

	for _, feed := range cfg.Feeds {
		log.Info("processing feed", "feed", feed.Name)
		ProcessFeed(feed, scheduler, cfg.DbDir)
	}

	/*
		for _, feed := range cfg.Feeds {
			log.Println("Processing feed", feed.Name)
			data, err := Download(feed.Url, feed.Proxy)
			if err != nil {
				log.Fatal(err)
			}
		}

		for _, feed := range c.Feeds {
			log.Println("Processing feed", feed.Name)

			links, err := parseFeed(data)
			if err != nil {
				log.Fatal(err)
			}

			for _, link := range links {
				if alreadySent(link) {
					continue
				}
				err := sendTelegram(link, feed.Channel, feed.Rhash)
				if err != nil {
					log.Fatal(err)
				}
			}
		}
		fmt.Println(configPath)
	*/
}

func ProcessFeed(feed FeedCfg, scheduler *Scheduler, dbDir string) {
	sd, err := scheduler.ShouldDownload(feed.Name, feed.Cron)
	if err != nil {
		log.Error("shouldDownload failed", "feed", feed.Name, "err", err)
		return
	}

	if !sd {
		log.Info("skipping feed due to schedule", "feed", feed.Name)
		return
	}

	db, err := NewDB(dbDir, feed.Name)
	if err != nil {
		log.Error("failed to get db", "feed", feed.Name, "db_dir", dbDir, "error", err)
		return
	}

	data, err := Download(feed.Url, feed.Proxy)
	if err != nil {
		log.Error("download failed", "feed", feed.Name, "url", feed.Url, "proxy", feed.Proxy, "error", err)
		return
	}

	entries, err := ParseFeed(data)
	if err != nil {
		log.Error("feed parsing failed", "feed", feed.Name, "data", data, "error", err)
		return
	}

	_, err = db.Filter(entries)
	if err != nil {
		log.Error("failed to filter entries", "feed", feed.Name, "error", err)
	}
}

func Download(url string, proxyUrl string) ([]byte, error) {
	client, err := proxy.GetClient(proxyUrl)
	if err != nil {
		return nil, err
	}
	res, err := client.Get(url)
	if err != nil {
		return nil, err
	}
	defer res.Body.Close()
	return io.ReadAll(res.Body)
}