package lib

import (
	"fmt"

	"github.com/mmcdole/gofeed"
)

type Video struct {
	ID    string
	Title string
	URL   string
}

type Youtube struct {
	channelID string
	parser    *gofeed.Parser
}

func NewYoutube(channelID string) *Youtube {
	return &Youtube{
		channelID: channelID,
		parser:    gofeed.NewParser(),
	}
}

func (y *Youtube) FetchLatest() ([]Video, error) {
	feedURL := fmt.Sprintf("https://www.youtube.com/feeds/videos.xml?channel_id=%s", y.channelID)
	feed, err := y.parser.ParseURL(feedURL)
	if err != nil {
		return nil, fmt.Errorf("parse feed: %w", err)
	}

	videos := make([]Video, 0, len(feed.Items))
	for _, item := range feed.Items {
		videos = append(videos, Video{
			ID:    item.GUID,
			Title: item.Title,
			URL:   item.Link,
		})
	}
	return videos, nil
}