package main

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

func main() {
	os.Setenv("LC_ALL", "C.UTF-8")
	client, err := youtubedl.New()
	if err != nil {
		panic(err)
	}
	interval := time.Hour * 4
	for true {
		err := do(client)
		if err != nil {
			log.Println(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 {
		target := fmt.Sprintf(
			"s%02d%02de%02d_%s.%%(ext)s",
			result.Date.Year()-2000,
			result.Date.Month(),
			result.Date.Day(),
			strings.Join(strings.Split(result.Title, " ")[2:], "_"),
		)
		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
		}
		if err := client.Download(result.Link, path.Join(config.Root, target)); err != nil {
			errs += ", " + err.Error()
		}
	}
	if errs != "" {
		return errors.New(errs)
	}
	return nil
}