package app

import (
	"fmt"
	"slices"
	"strings"

	"git.urbach.dev/go/markdown"
	"git.urbach.dev/go/web"
)

func RenderPost(ctx web.Context, id string) error {
	var (
		post    = Posts[id]
		title   string
		content string
		created string
		tags    []string
	)

	if post != nil {
		title = post.Title
		content = post.Content
		created = post.Created
		tags = post.Tags
	} else {
		title = "Not found"
		content = fmt.Sprintf("Post `%s` does not exist.", id)
		ctx.Status(404)
	}

	head := fmt.Sprintf(`<title>%s</title><meta name="keywords" content="%s">`, title, strings.Join(tags, ","))

	if slices.Contains(tags, "article") {
		content = fmt.Sprintf(
			`<article><header><h1>%s</h1><time datetime="%s">%s</time></header>%s</article>`,
			title,
			created,
			created[:len("YYYY-MM-DD")],
			markdown.Render(content),
		)
	} else {
		content = fmt.Sprintf(
			`<h2>%s</h2>%s`,
			title,
			markdown.Render(content),
		)
	}

	return Render(ctx, head, content)
}