package widget

import (
	"context"
	"html/template"
	"time"

	"github.com/glanceapp/glance/internal/assets"
	"github.com/glanceapp/glance/internal/feed"
)

type Lobsters struct {
	widgetBase     `yaml:",inline"`
	Feed           string          `yaml:"feed"`
	Posts          feed.ForumPosts `yaml:"-"`
	Limit          int             `yaml:"limit"`
	CollapseAfter  int             `yaml:"collapse-after"`
	ShowThumbnails bool            `yaml:"-"`
}

func (widget *Lobsters) Initialize() error {
	widget.withTitle("Lobsters").withCacheDuration(30 * time.Minute)

	if widget.Feed == "" {
		widget.Feed = "https://lobste.rs/rss"
	}

	if widget.Limit <= 0 {
		widget.Limit = 15
	}

	if widget.CollapseAfter == 0 || widget.CollapseAfter < -1 {
		widget.CollapseAfter = 5
	}

	return nil
}

func (widget *Lobsters) Update(ctx context.Context) {
	posts, err := feed.FetchLobstersTopPosts(widget.Feed, widget.Limit)

	if !widget.canContinueUpdateAfterHandlingErr(err) {
		return
	}

	if widget.Limit < len(posts) {
		posts = posts[:widget.Limit]
	}

	widget.Posts = posts
}

func (widget *Lobsters) Render() template.HTML {
	return widget.render(widget, assets.ForumPostsTemplate)
}