{-# LANGUAGE OverloadedStrings #-}
module Main
    ( main
    , spec
    ) where

import qualified Data.Vector                       as V
import qualified Network.Greskell.WebSocket.Client as WS
import           System.IO                         (hPutStrLn, stderr)
import           Test.Hspec

import           Control.Category                  ((<<<))
import           Control.Monad                     (void)
import           Data.Greskell.Binder              (newBind, runBinder)
import           Data.Greskell.Graph               (AEdge, AVertex (..), AVertexProperty (..), Key,
                                                    Property (propertyKey, propertyValue))
import           Data.Greskell.GraphSON            (parseEither)
import           Data.Greskell.GTraversal          (GTraversal, SideEffect, Walk, gAddE', gHas2,
                                                    gHasId, gHasLabel, gId, gProperties, gProperty,
                                                    gTo, gV', gValues, liftWalk, sAddV', sE', sV',
                                                    source, ($.))
import           Data.Text                         (Text)

import           ServerTest.Common                 (withClient, withEnv)

main :: IO ()
main = hspec spec

spec :: Spec
spec = withEnv $ do
  spec_values_type
  spec_generic_element_ID
  spec_vertex_with_props

clearGraph :: WS.Client -> IO ()
clearGraph client = WS.drainResults =<< WS.submitRaw client "g.V().drop()" Nothing

spec_values_type :: SpecWith (String,Int)
spec_values_type = describe "return type of .values step" $ do
  specify "input Int, get Int" $ withClient $ \client -> do
    let prop_key :: Key AVertex Int
        prop_key = "foobar"
        searchProp = WS.drainResults =<< WS.submit client script (Just binding)
          where
            (script, binding) = runBinder $ do
              input <- newBind (100 :: Int)
              return $ gHas2 prop_key input $. sV' [] $ source "g"
        putProp = WS.slurpResults =<< WS.submit client script (Just binding)
          where
            (script, binding) = runBinder $ do
              input <- newBind (100 :: Int)
              return $ liftWalk gId $. gProperty prop_key input $. sAddV' "hoge" $ source "g"
        getProp vid = WS.slurpResults =<< WS.submit client script (Just binding)
          where
            (script, binding) = runBinder $ do
              vid_var <- newBind vid
              return $ gValues [prop_key] $. gHasId vid_var $. gHasLabel "hoge" $. sV' [] $ source "g"
    clearGraph client
    searchProp
    got_ids <- putProp
    got <- getProp (got_ids V.! 0)
    V.toList got `shouldBe` [100]

spec_generic_element_ID :: SpecWith (String, Int)
spec_generic_element_ID = do
  specify "get Vertex ID as GValue, query Vertex by GValue" $ withClient $ \client -> do
    let prop_key :: Key AVertex Int
        prop_key = "sample"
        prop_val = 125
        make_v = liftWalk gId $. gProperty prop_key prop_val $. (sAddV' "test" $ source "g")
    clearGraph client
    got_ids <- fmap V.toList $ WS.slurpResults =<< WS.submit client make_v Nothing
    hPutStrLn stderr ("Got Vertex IDs: " <> show got_ids)
    length got_ids `shouldBe` 1
    let (q, qbind) = runBinder $ do
          vid <- newBind (got_ids !! 0)
          return $ gValues [prop_key] $. (sV' [vid] $ source "g")
    got_vals <- fmap V.toList $ WS.slurpResults =<< WS.submit client q (Just qbind)
    got_vals `shouldBe` [125]
  specify "get Edge ID as GValue, query Edge by GValue" $ withClient $ \client -> do
    let vname_key :: Key AVertex Text
        vname_key = "name"
        ename_key :: Key AEdge Text
        ename_key = "name"
        makeV n = (liftWalk $ gProperty vname_key n) $. (sAddV' "test_v" $ source "g")
        makeE fn tn = liftWalk gId
                      $. gProperty ename_key "e_test"
                      $. gAddE' "test_e" (gTo $ gHas2 vname_key tn <<< gV' [])
                      $. gHas2 vname_key fn
                      $. (liftWalk $ sV' [] $ source "g")
    clearGraph client
    void $ WS.slurpResults =<< WS.submit client (makeV "v_from") Nothing
    void $ WS.slurpResults =<< WS.submit client (makeV "v_to") Nothing
    got_ids <- fmap V.toList $ WS.slurpResults =<< WS.submit client (makeE "v_from" "v_to") Nothing
    hPutStrLn stderr ("Got Edge IDs: " <> show got_ids)
    length got_ids `shouldBe` 1
    let (q, qbind) = runBinder $ do
          eid <- newBind (got_ids !! 0)
          return $ gValues [ename_key] $. (sE' [eid] $ source "g")
    got_vals <- fmap V.toList $ WS.slurpResults =<< WS.submit client q (Just qbind)
    got_vals `shouldBe` ["e_test"]

spec_vertex_with_props :: SpecWith (String, Int)
spec_vertex_with_props = do
  let prop_key :: Key AVertex Int
      prop_key = "sample"
      makeV = gProperty prop_key 1132 $. (sAddV' "test" $ source "g")
      getProps vid = gProperties [prop_key] $. (sV' [vid] $ source "g")
  specify "get Vertex element as AVertex, VertexProperty element as AVertexProperty" $ withClient $ \client -> do
    clearGraph client
    got_vs <- fmap V.toList $ WS.slurpResults =<< WS.submit client makeV Nothing
    (fmap avLabel $ got_vs) `shouldBe` ["test"]
    let (query, bindings) = runBinder $ do
          vid <- newBind $ avId (got_vs !! 0)
          return $ getProps vid
    got_vps <- fmap V.toList $ WS.slurpResults =<< WS.submit client query (Just bindings)
    map (\vp -> (avpLabel vp, avpValue vp)) got_vps `shouldBe` [("sample", 1132)]