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{-# LANGUAGE OverloadedStrings #-}
import Hakyll

import Data.List
       (isPrefixOf, isSuffixOf)

import System.FilePath
       (takeFileName)


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main :: IO ()
main = hakyllWith defaultConfiguration{ignoreFile = ignore} $ do
  match "well-known/*" $ do
    route (customRoute (prepend '.'. toFilePath))
    compile copyFileCompiler

  match "images/*" $ do
    route   idRoute
    compile copyFileCompiler

  match "resources/*" $ do
    route   idRoute
    compile copyFileCompiler

  match "css/*" $ do
    route   idRoute
    compile compressCssCompiler

  match "js/*" $ do
    route   idRoute
    compile compressCssCompiler

  match "posts/*" $ do
    route $ setExtension "html"
    compile $ pandocCompiler
      >>= loadAndApplyTemplate "templates/post.html" postContext
      >>= loadAndApplyTemplate "templates/default.html" defaultContext
      >>= relativizeUrls


  match (fromList ["index.markdown", "contact.markdown"]) $ do
    route   $ setExtension "html"
    compile $ pandocCompiler
      >>= loadAndApplyTemplate "templates/default.html" defaultContext
      >>= relativizeUrls

  create ["posts.html"] $ do
    route idRoute
    compile $ do
      let postsContext =
               listField "posts" postContext posts
            <> constField "title" "Posts"
            <> defaultContext
          posts = recentFirst =<< loadAll "posts/*"
      makeItem ""
        >>= loadAndApplyTemplate "templates/post-list.html" postsContext
        >>= loadAndApplyTemplate "templates/default.html" postsContext
        >>= relativizeUrls



  match "templates/*" $ compile templateBodyCompiler
  where
    postContext :: Context String
    postContext = dateField "date" "%B %e, %Y" <> defaultContext
    ignore :: FilePath -> Bool
    ignore path = any ($ takeFileName path)
      [ ("." `isPrefixOf`)
      , ("#" `isPrefixOf`)
      , ("~" `isSuffixOf`)
      , (".swp" `isSuffixOf`)
      ]


prepend :: a -> [a] -> [a]
prepend = (:)