///|
pub(all) struct NavItem {
  title : String
  route : String
  depth : Int
}

///|
pub fn navigation_from_pages(pages : Array[PagePlan]) -> Array[NavItem] {
  let items : Array[NavItem] = []
  for page in pages {
    items.push({
      title: page.title,
      route: page.route,
      depth: route_depth(page.route),
    })
  }
  items
}

///|
pub fn route_depth(route : String) -> Int {
  if route == "/" {
    0
  } else {
    let parts = route.split("/")
    let mut depth = 0
    for part in parts {
      if part.trim() != "" {
        depth = depth + 1
      }
    }
    depth - 1
  }
}

///|
pub fn render_sidebar(items : Array[NavItem]) -> String {
  render_sidebar_for_lang(items, "en")
}

///|
pub fn render_sidebar_for_lang(items : Array[NavItem], lang : String) -> String {
  let mut html = "\n"
}

///|
pub fn render_language_switcher(
  current_lang : String,
  route : String,
) -> String {
  let en_href = if route == "/" { "/" } else { route }
  let zh_href = if route == "/" { "/zh/" } else { "/zh" + route }
  let en_class = if current_lang == "en" { " active" } else { "" }
  let zh_class = if current_lang == "zh" { " active" } else { "" }
  "
" +
  "English" +
  "中文" +
  "
\n"
}

///|
pub fn localized_href(lang : String, route : String) -> String {
  if lang == "en" {
    route
  } else if route == "/" {
    "/" + lang + "/"
  } else {
    "/" + lang + route
  }
}