package control

import (
	"fmt"
	"time"

	"git.streifling.com/jason/rss"
	"streifling.com/jason/cpolis/cmd/data"
)

func GetChannel(db *data.DB, title, link, desc string) (*rss.Channel, error) {
	channel := &rss.Channel{
		Title:       title,
		Link:        link,
		Description: desc,
		Items:       make([]*rss.Item, 0),
	}

	articles, err := db.GetCertainArticles(true)
	if err != nil {
		return nil, fmt.Errorf("error fetching published articles: %v", err)
	}

	for _, article := range articles {
		tags, err := db.GetArticleTags(article.ID)
		if err != nil {
			return nil, fmt.Errorf("error fetching tags for article %v: %v", article.Title, err)
		}
		tagNames := make([]string, 0)
		for _, tag := range tags {
			tagNames = append(tagNames, tag.Name)
		}

		user, err := db.GetUser(article.AuthorID)
		if err != nil {
			return nil, fmt.Errorf("error finding user %v: %v", article.AuthorID, err)
		}

		channel.Items = append(channel.Items, &rss.Item{
			Title:       article.Title,
			Author:      user.FirstName + user.LastName,
			PubDate:     article.Created.Format(time.RFC1123Z),
			Description: article.Desc,
			Content:     &rss.Content{Value: article.Content},
			Categories:  tagNames,
		})
	}

	return channel, nil
}