;; Extension — table-of-contents rendering.

(st-bootstrap-classes!)
(content/bootstrap!)
(content-bootstrap-section!)

(define nl (str "\n"))

(define
  d
  (doc-append
    (doc-append
      (doc-append
        (doc-append (doc-empty "d") (mk-heading "intro" 1 "Intro"))
        (mk-text "p" "x"))
      (mk-heading "bg" 2 "Background"))
    (mk-section "s" (list (mk-heading "deep" 2 "Details")))))

;; ── markdown TOC (indented by level) ──
(content-test
  "toc markdown"
  (content/toc-markdown d)
  (str
    "- [Intro](#intro)"
    nl
    "  - [Background](#bg)"
    nl
    "  - [Details](#deep)"))

;; ── html TOC (anchor links) ──
(content-test
  "toc html"
  (content/toc-html d)
  "<ul><li><a href=\"#intro\">Intro</a></li><li><a href=\"#bg\">Background</a></li><li><a href=\"#deep\">Details</a></li></ul>")

;; ── html escapes heading text ──
(content-test
  "toc html escapes"
  (content/toc-html
    (doc-append (doc-empty "d") (mk-heading "h" 1 "A < B")))
  "<ul><li><a href=\"#h\">A &lt; B</a></li></ul>")

;; ── empty / no headings ──
(content-test "toc html empty" (content/toc-html (doc-empty "e")) "")
(content-test "toc markdown empty" (content/toc-markdown (doc-empty "e")) "")
(content-test
  "toc no headings"
  (content/toc-html (doc-append (doc-empty "d") (mk-text "p" "just text")))
  "")

;; ── single heading ──
(content-test
  "toc single md"
  (content/toc-markdown
    (doc-append (doc-empty "d") (mk-heading "h" 1 "Only")))
  "- [Only](#h)")

;; ── deep level indentation ──
(content-test
  "toc deep indent"
  (content/toc-markdown
    (doc-append (doc-empty "d") (mk-heading "h" 3 "Deep")))
  "    - [Deep](#h)")