package main

import (
	"flag"
	"fmt"
	"os"
	"sort"

	htmltomarkdown "github.com/JohannesKaufmann/html-to-markdown/v2"
	glamour "github.com/charmbracelet/glamour"
	goFeed "github.com/mmcdole/gofeed"
)

type Options struct {
	sortAsc  bool
	showDesc bool
}

func main() {
	url := os.Getenv("ATOM_URL")
	sortAsc := flag.Bool("s", false, "Sort from oldest to newest")
	showDesc := flag.Bool("d", false, "Show description for each event")
	flag.Parse()

	if url == "" {
		url = "https://5ika.ch/posts/index.xml"
	}

	feedString := getFeedString(url, Options{
		sortAsc:  *sortAsc,
		showDesc: *showDesc,
	})

	fmt.Print(feedString)
}

func getFeedString(url string, options Options) string {
	fmt.Printf("Get feed from %s\n\n", url)
	fp := goFeed.NewParser()
	feed, _ := fp.ParseURL(url)

	if options.sortAsc {
		sort.Sort(feed)
	}

	feedString := ""
	for _, item := range feed.Items {
		feedString = fmt.Sprintf("%s%s", feedString, renderFeedItem(item, options.showDesc))
	}

	return feedString
}

func renderFeedItem(item *goFeed.Item, showDesc bool) string {
	contentMd, _ := htmltomarkdown.ConvertString(item.Description)
	glamourRender, _ := glamour.NewTermRenderer(
		glamour.WithAutoStyle(),
		glamour.WithStylePath("./catppuccin.glamour.json"),
	)
	content, _ := glamourRender.Render(contentMd)

	itemString := fmt.Sprintf("%s%s %s\n",
		style.date.Render(item.PublishedParsed.Format("02.01.2006 15:04")),
		style.author.Render(item.Author.Name),
		style.title.Render(item.Title),
	)
	if showDesc {
		itemString = fmt.Sprintf("%s%s\n", itemString, content)
	}

	return itemString
}