Editing Module:RedditUtil

local p = {}

local function trim(s)
  if type(s) ~= 'string' then return nil end
  return (s:gsub('^%s+', ''):gsub('%s+$', ''))
end

local function parse_from_url(url)
  if type(url) ~= 'string' then return {} end
  local u = url
  -- normalize common host variants
  -- supports old.reddit.com / www.reddit.com / reddit.com
  local sub, id = u:match('^https?://[^/]*reddit%.com/r/([A-Za-z0-9_]+)/comments/([A-Za-z0-9]+)/')
  if sub and id then
    return {subreddit = sub, id = id}
  end
  -- also handle .../comments/<id> (rare, without subreddit in path)
  id = u:match('^https?://[^/]*reddit%.com/comments/([A-Za-z0-9]+)/')
  if id then
    return {id = id}
  end
  -- shortlink: https://redd.it/<id>
  id = u:match('^https?://[^/]*redd%.it/([A-Za-z0-9]+)')
  if id then
    return {id = id}
  end
  return {}
end

function p.render(frame)
  local args = frame:getParent() and frame:getParent().args or frame.args
  local url       = trim(args.url)
  local author    = trim(args.author)
  local authorURL = trim(args.author_url)
  local title     = trim(args.title)
  local text      = trim(args.text)
  local dateHuman = trim(args.date)
  local dateISO   = trim(args.datetime) or dateHuman
  local score     = trim(args.score)
  local comments  = trim(args.comments)

  local parsed = parse_from_url(url or '')
  local subreddit = trim(args.subreddit) or parsed.subreddit
  local id = parsed.id

  local h = mw.html.create('div')
    :addClass('mw-reddit')
    :cssText('border:1px solid #e2e8f0;border-radius:8px;padding:12px 14px;margin:8px 0;background:#fff;')

  -- Header line: “Reddit • r/subreddit”
  local header = h:tag('div'):addClass('mw-reddit-header')
    :cssText('font-size:0.9em;color:#475569;margin-bottom:6px;display:flex;gap:8px;align-items:center;')

  header:tag('span'):wikitext('Reddit')
  if subreddit then
    header:tag('span'):wikitext('•'):css('opacity','0.6')
    header:tag('span'):wikitext('r/' .. subreddit)
  end

  -- Title (if any)
  if title and title ~= '' then
    h:tag('div')
      :addClass('mw-reddit-title')
      :cssText('font-weight:600;margin:2px 0 6px 0;')
      :wikitext(title)
  end

  -- Body text (optional)
  if text and text ~= '' then
    h:tag('blockquote')
      :addClass('mw-reddit-text')
      :cssText('margin:6px 0 10px 0;padding:0 0 0 12px;border-left:3px solid #e2e8f0;color:#0f172a;')
      :wikitext(text)
  end

  -- Meta line: author • date • score • comments
  local meta = h:tag('div'):addClass('mw-reddit-meta')
    :cssText('font-size:0.85em;color:#475569;display:flex;flex-wrap:wrap;gap:8px;align-items:center;')

  local function addBullet()
    meta:tag('span'):wikitext('•'):css('opacity','0.6')
  end

  if author and author ~= '' then
    if authorURL and authorURL ~= '' then
      meta:wikitext(string.format('[[%s|%s]]', authorURL, author))
    else
      meta:wikitext(author)
    end
  end

  if dateHuman and dateHuman ~= '' then
    if author and author ~= '' then addBullet() end
    local t = meta:tag('time'):attr('datetime', dateISO or ''):wikitext(dateHuman)
  end

  if score and score ~= '' then
    if (author and author ~= '') or (dateHuman and dateHuman ~= '') then addBullet() end
    meta:wikitext(tostring(score) .. ' points')
  end

  if comments and comments ~= '' then
    if (author and author ~= '') or (dateHuman and dateHuman ~= '') or (score and score ~= '') then addBullet() end
    meta:wikitext(tostring(comments) .. ' comments')
  end

  -- Permalink
  if url and url ~= '' then
    local linkLine = h:tag('div'):addClass('mw-reddit-link')
      :cssText('margin-top:6px;')
    local anchorText
    if subreddit and id then
      anchorText = string.format('Permalink: r/%s • %s', subreddit, id)
    elseif id then
      anchorText = 'Permalink: ' .. id
    else
      anchorText = 'Permalink'
    end
    linkLine:wikitext(string.format('[%s %s]', url, anchorText))
  end

  return tostring(h)
end

return p