package main

import (
	"errors"
	"fmt"
	"local/youtuber/config"
	"local/youtuber/feed"
	"local/youtuber/youtubedl"
	"log"
	"os"
	"path"
	"strings"
	"time"
)

func main() {
	client, err := youtubedl.New()
	if err != nil {
		panic(err)
	}
	interval := config.Interval
	for true {
		err := do(client)
		if err != nil {
			log.Println(err)
			if err := config.Emailer.Send(
				config.To,
				config.Subject,
				fmt.Sprintf("error getting youtuber: %v", err),
			); err != nil {
				panic(err)
			}
		}
		log.Printf("sleeping until %v", time.Now().Add(interval))
		time.Sleep(interval)
	}
}

func do(client *youtubedl.Client) error {
	errs := ""

	results, err := feed.Fetch(config.Feed)
	if err != nil {
		return err
	}

	for _, result := range results {
		seasonNumber := fmt.Sprintf("%02d%02d", result.Date.Year()-2000, result.Date.Month())
		episodeNumber := fmt.Sprintf("%02d", result.Date.Day())
		season := fmt.Sprintf("Season_%s", seasonNumber)
		episode := fmt.Sprintf("Episode_%s_-_%s", episodeNumber, strings.Join(strings.Split(result.Title, " ")[2:], "_"))
		target := fmt.Sprintf("%s/%s.%%(ext)s", season, episode)
		target = path.Join(config.Root, target)
		if _, err := os.Stat(strings.ReplaceAll(target, "%(ext)s", "mp4")); !os.IsNotExist(err) {
			log.Printf("already exists: %s", target)
			continue
		}
		os.MkdirAll(path.Dir(target), os.ModePerm)
		if err := client.Download(result.Link, target); err != nil {
			errs += ", " + err.Error()
		}
	}
	if errs != "" {
		return errors.New(errs)
	}
	return nil
}