{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE DuplicateRecordFields #-}
{-# LANGUAGE OverloadedRecordDot #-}
{-# HLINT ignore "Use const" #-}
{-# HLINT ignore "Unused LANGUAGE pragma" #-}
{-# HLINT ignore "Avoid lambda" #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE NoFieldSelectors #-}
{-# OPTIONS_GHC -Wno-unrecognised-pragmas #-}
{-# LANGUAGE TypeApplications #-}

module Test.Datalog.NaiveDatabaseSpec where

import Test.Hspec
import Datalog.NaiveDatabase
import qualified Datalog.NaiveDatabase as NaiveDatabase

-- checkParse :: String -> Expr -> Expectation
-- checkParse text expectedExpr = 
--   parse parseExpr "" text `shouldBe` Right expectedExpr

-- checkEval :: String -> Int -> Expectation
-- checkEval text expectedVal = 
--   fmap eval (parse parseExpr "" text) `shouldBe` Right expectedVal

-- getConfig :: IO Config
-- getConfig = do
--   env <- lookupEnv "APP_ENV"
--   let fallbackHosts =
--         [ "localhost:8080"
--         , "127.0.0.1:9000"
--         , "backup.example.com"
--         ]
--   pure Config
--     { port     = 3000
--     , hosts    = fromMaybe fallbackHosts env
--     , logLevel = Info
--     }

spec :: Spec
spec = do
  describe "dummy test" $ do
    it "..." $ do
      1 `shouldBe` (1 :: Int)
    it "can accept facts and do basic queries" $ do
      -- let fallbackHosts =
      --       [ "localhost:8080"
      --       , "127.0.0.1:9000"
      --       , "backup.example.com"
      --       ]
      -- let names =
      --       [ "Alice"
      --       , "Bob"
      --       , "Charlie"
      --       , "Daphne"
      --       , "Eve"
      --       ]
      -- let twig = 
      --       [ "xx"
      --       , "yy "  ]
      -- let pig = 
      --       [ "parent(\"alice\", \"bob\")."
      --       , "parent(\"bob\", \"carol\")." 
      --       ]
      let db = NaiveDatabase.withFacts 
            [ "parent(\"alice\", \"bob\")."
            , "parent(\"bob\", \"carol\")." ]
      query  db"?- parent(alice,X)." `shouldBe` "#NYI" -- ideally, 'bob'