{-# LANGUAGE OverloadedStrings #-}

import Data.List (sortBy)
import Data.Monoid (mappend)
import Data.Ord (comparing)

import Hakyll
import Hakyll.Core.Item (Item(itemIdentifier))
import System.Process (readProcess)

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

  match "design/**" $ do
    route $ customRoute $ const "main.css"
    compile $ do
      filePath <- getResourceFilePath
      unsafeCompiler (readProcess "runghc" [ filePath ] "")
        >>= makeItem

  match "legumes/**" $ do
    route $ setExtension "html"
    compile $ pandocCompiler
      >>= loadAndApplyTemplate "templates/main.html" defaultContext
      >>= relativizeUrls

  match "index.html" $ do
    route idRoute
    let context =
          listField "vegetables" defaultContext (loadAll "legumes/*") `mappend`
          defaultContext
    compile $
      getResourceBody
          >>= applyAsTemplate context
          >>= loadAndApplyTemplate "templates/main.html" context
          >>= relativizeUrls

  match "templates/*" $ compile templateBodyCompiler

configuration :: Configuration
configuration = defaultConfiguration
  { destinationDirectory = "public"
  , inMemoryCache = True
  }