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{-# LANGUAGE OverloadedStrings #-}
import           Data.Monoid ((<>))
import           Hakyll


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main :: IO ()
main = hakyll $ do
    match "images/*" $ do
        route   idRoute
        compile copyFileCompiler

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

    match "log/*.org" $ do
        route $ setExtension "html"
        compile $ pandocCompiler
            >>= loadAndApplyTemplate "templates/post.html" postCtx
            >>= relativizeUrls

    create ["log/index.html"] $ do
        route idRoute
        compile $ do
            makeItem ""
                >>= loadAndApplyTemplate "templates/archive.html" postForArchiveCtx
                >>= loadAndApplyTemplate "templates/post.html" archiveCtx
                >>= relativizeUrls

    match "article/**" $ do
        route   idRoute
        compile getResourceBody

    match "index.html" $ do
        route idRoute
        compile $ do
          getResourceBody
            >>= applyAsTemplate indexCtx
            >>= relativizeUrls

    match "templates/*" $ compile templateBodyCompiler


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posts :: Compiler [Item String]
posts = recentFirst =<< loadAll "log/*.org"

articles :: Compiler [Item String]
articles = loadAll "article/**"

recentPosts :: Compiler [Item String]
recentPosts = (take 4) <$> posts

recentArticles :: Compiler [Item String]
recentArticles = (take 4) <$> articles

indexCtx :: Context String
indexCtx =
     listField "articles" defaultContext recentArticles
  <> listField "rposts" defaultContext recentPosts
  <> constField "essays" "Soon"
  <> constField "title" "Home"
  <> defaultContext

archiveCtx :: Context String
archiveCtx =
       constField "title" "archive of log posts"
    <> defaultContext

postCtx :: Context String
postCtx =
    dateField "date" "%B %e, %Y" <> defaultContext

postForArchiveCtx :: Context String
postForArchiveCtx =
       listField "posts" dateForArchiveCtx posts
    <> defaultContext

dateForArchiveCtx :: Context String
dateForArchiveCtx =
    dateField "date" "%d %b %Y" <> defaultContext