sitegen = require "sitegen"
tools = require "sitegen.tools"
site = require "sitegen.site"
path = require "sitegen.path"
html = require "sitegen.html"
-- import slugify from "sitegen.common"

lfs = require "lfs"
date = require "date"

-- Monkey-patch sitegen to use pandoc for markdown conversion
os.execute "moonc -t \\
  /usr/local/openresty/luajit/share/lua/5.1/sitegen/renderers/ markdown.moon"

-- Change output dir to what Openresty prefers
site.config.out_dir = "html/"

-- Deactivate "pygments" plugin because it conflicts with pandoc highlighting
site.default_plugins = for v in *site.default_plugins
  if v\find "pygments" then continue else v

rootname = (str) ->
  result = string.gsub str, "%..+", ""
  result

split = (str, delimiter="/") ->
  [capture for capture in string.gmatch str, "[^#{delimiter}]+"]

last = (list) -> list[#list]
join = (first, last, delimiter="/") -> table.concat { first, last }, delimiter
target = (path, prefix) -> join prefix, rootname(last(split path))

posts = (path=".") ->
  files = [file for file in lfs.dir path when file != "." and file != ".."]
  {join(path, file), target(file, "/posts") for _, file in ipairs files}

extract_id = (source) -> string.match path.filename(source), "%a[%w%-]+"
extract_date = (source) -> string.match path.filename(source), "%d+%-%d%d%-%d%d"
format_date = (str) -> date(str)\fmt "%b %d, %Y"
publish_date = (path) -> format_date extract_date path

list_posts = (page, limit) ->
  posts = page.site\query_pages { is_a: "post" }
  table.sort posts, (a, b) -> a.source > b.source

  html.build ->
    [section {
      h3 { a { href: meta.target .. ".html", meta.title or meta.id }}
      time { publish_date source }
      { "—", if meta.blurb then text meta.blurb }
      a { class: "read-post-link", href: meta.target .. ".html",
        "Read post →"
      }
    } for { meta: meta, source: source } in *posts[1, limit or #posts]]

sitegen.create =>
  @site_title = "WebDevCat.me · Catalin Mititiuc"
  @app_name = "stasis"
  @version = "0.2.12"
  @list_posts = list_posts

  add "index.html"
  add "blog.html", target: "posts/index", template: "blog"

  add path, target: out, template: "post", is_a: "post", post: {
    publish_date: publish_date(path)
  }, id: extract_id(path) for path, out in pairs posts "docs"

  -- replace post markdown yaml headers with moonscript headers
  filter "docs", (body) =>
    body\gsub "^%-%-%-.-%.%.%.", (yaml_header) ->
      header = yaml_header\gsub "%-%-%-", "{"
      moonscript_header = header\gsub "%.%.%.", "}"
      moonscript_header

  copy "app.css"