{-# LANGUAGE ExplicitForAll             #-}
{-# LANGUAGE FlexibleContexts           #-}
{-# LANGUAGE FlexibleInstances          #-}
{-# LANGUAGE InstanceSigs               #-}
{-# LANGUAGE MultiParamTypeClasses      #-}
{-# LANGUAGE NoMonomorphismRestriction  #-}
{-# LANGUAGE OverloadedStrings          #-}
{-# LANGUAGE ScopedTypeVariables        #-}

{-# OPTIONS_GHC -fno-warn-missing-signatures #-}

module HaskellWorks.Data.Xml.ValueSpec (spec) where

import           Control.Monad
import           Data.Monoid
import qualified Data.ByteString                                  as BS
import           Data.String
import qualified Data.Vector.Storable                             as DVS
import           Data.Word
import           HaskellWorks.Data.Bits.BitShown
import           HaskellWorks.Data.Bits.BitWise
import           HaskellWorks.Data.FromForeignRegion
import           HaskellWorks.Data.Xml.Succinct.Cursor            as C
import           HaskellWorks.Data.Xml.Succinct.Index
import           HaskellWorks.Data.Xml.Value
import           HaskellWorks.Data.BalancedParens.BalancedParens
import           HaskellWorks.Data.BalancedParens.Simple
import           HaskellWorks.Data.RankSelect.Base.Rank0
import           HaskellWorks.Data.RankSelect.Base.Rank1
import           HaskellWorks.Data.RankSelect.Base.Select1
import           HaskellWorks.Data.RankSelect.Poppy512
import qualified HaskellWorks.Data.TreeCursor                     as TC
import           Test.Hspec

{-# ANN module ("HLint: ignore Redundant do"        :: String) #-}
{-# ANN module ("HLint: ignore Reduce duplication"  :: String) #-}
--{-# ANN module ("HLint: ignore Redundant bracket"   :: String) #-}

fc = TC.firstChild
ns = TC.nextSibling
-- cd = TC.depth

attrs :: [(String, String)] -> XmlValue
attrs as = XmlAttrList $ as >>= (\(k, v) -> [XmlAttrName k, XmlAttrValue v])

spec :: Spec
spec = describe "HaskellWorks.Data.Xml.ValueSpec" $ do
  genSpec "DVS.Vector Word8"  (undefined :: XmlCursor BS.ByteString (BitShown (DVS.Vector Word8)) (SimpleBalancedParens (DVS.Vector Word8)))
  genSpec "DVS.Vector Word16" (undefined :: XmlCursor BS.ByteString (BitShown (DVS.Vector Word16)) (SimpleBalancedParens (DVS.Vector Word16)))
  genSpec "DVS.Vector Word32" (undefined :: XmlCursor BS.ByteString (BitShown (DVS.Vector Word32)) (SimpleBalancedParens (DVS.Vector Word32)))
  genSpec "DVS.Vector Word64" (undefined :: XmlCursor BS.ByteString (BitShown (DVS.Vector Word64)) (SimpleBalancedParens (DVS.Vector Word64)))
  genSpec "Poppy512"          (undefined :: XmlCursor BS.ByteString Poppy512 (SimpleBalancedParens (DVS.Vector Word64)))

xmlValueVia  :: XmlIndexAt (XmlCursor BS.ByteString t u)
              => Maybe (XmlCursor BS.ByteString t u) -> XmlValue
xmlValueVia mk = case mk of
  Just k    -> xmlValueAt (xmlIndexAt k) --either (\(DecodeError e) -> XmlError e) id (xmlValueAt <$> xmlIndexAt k)
  Nothing   -> XmlError "No such element"

genSpec :: forall t u.
  ( Eq                t
  , Show              t
  , Select1           t
  , Eq                u
  , Show              u
  , Rank0             u
  , Rank1             u
  , BalancedParens    u
  , TestBit           u
  , FromForeignRegion (XmlCursor BS.ByteString t u)
  , IsString          (XmlCursor BS.ByteString t u)
  , XmlIndexAt        (XmlCursor BS.ByteString t u)
  )
  => String -> XmlCursor BS.ByteString t u -> SpecWith ()
genSpec t _ = do
  describe ("Json cursor of type " <> t) $ do
    let forXml (cursor :: XmlCursor BS.ByteString t u) f = describe ("of value " <> show cursor) (f cursor)

    forXml "<a/>" $ \cursor -> do
      it "should have correct value"      $ xmlValueVia (Just cursor) `shouldBe` XmlElement "a" []

    forXml "<a attr='value'/>" $ \cursor -> do
      it "should have correct value"    $ xmlValueVia (Just cursor) `shouldBe`
        XmlElement "a" [attrs [("attr", "value")]]

    forXml "<a attr='value'><b attr='value' /></a>" $ \cursor -> do
      it "should have correct value"    $ xmlValueVia (Just cursor) `shouldBe`
        XmlElement "a" [attrs [("attr", "value")],
          XmlElement "b" [attrs [("attr", "value")]]]

    forXml "<a>value text</a>" $ \cursor -> do
      it "should have correct value"      $ xmlValueVia (Just cursor) `shouldBe`
        XmlElement "a" [XmlText "value text"]

    forXml "<!-- some comment -->" $ \cursor -> do
      it "should parse space separared comment" $ xmlValueVia (Just cursor) `shouldBe`
        XmlComment " some comment "

    forXml "<!--some comment ->-->" $ \cursor -> do
      it "should parse space separared comment" $ xmlValueVia (Just cursor) `shouldBe`
        XmlComment "some comment ->"

    forXml "<![CDATA[a <br/> tag]]>" $ \cursor -> do
      it "should parse cdata data" $ xmlValueVia (Just cursor) `shouldBe`
        XmlCData "a <br/> tag"

    forXml "<!DOCTYPE greeting [<!ELEMENT greeting (#PCDATA)>]>" $ \cursor -> do
      it "should parse metas" $ xmlValueVia (Just cursor) `shouldBe`
        XmlMeta "DOCTYPE" [XmlMeta "ELEMENT" []]

    forXml "<?xml version=\"1.0\" encoding=\"UTF-8\"?><a text='value'>free</a>" $ \cursor -> do
      it "should parse xml header" $ xmlValueVia (Just cursor) `shouldBe`
        XmlDocument [
          attrs [("version", "1.0"), ("encoding", "UTF-8")],
          XmlElement "a" [attrs [("text", "value")],
          XmlText "free"]]

      it "navigate around" $ do
        xmlValueVia (ns cursor) `shouldBe` XmlElement "a" [attrs [("text", "value")], XmlText "free"]
        xmlValueVia ((ns >=> fc) cursor) `shouldBe` attrs [("text", "value")]
        xmlValueVia ((ns >=> fc >=> fc) cursor) `shouldBe` XmlAttrName "text"
        xmlValueVia ((ns >=> fc >=> fc >=> ns) cursor) `shouldBe` XmlAttrValue "value"
        xmlValueVia ((ns >=> fc >=> ns) cursor) `shouldBe` XmlText "free"

    -- forXml " {}" $ \cursor -> do
    --   it "should have correct value"      $ xmlValueVia (Just cursor) `shouldBe` Right (JsonObject [])
    -- forXml "1234" $ \cursor -> do
    --   it "should have correct value"      $ xmlValueVia (Just cursor) `shouldBe` Right (JsonNumber 1234)
    -- forXml "\"Hello\"" $ \cursor -> do
    --   it "should have correct value"      $ xmlValueVia (Just cursor) `shouldBe` Right (JsonString "Hello")
    -- forXml "[]" $ \cursor -> do
    --   it "should have correct value"      $ xmlValueVia (Just cursor) `shouldBe` Right (JsonArray [])
    -- forXml "true" $ \cursor -> do
    --   it "should have correct value"      $ xmlValueVia (Just cursor) `shouldBe` Right (JsonBool True)
    -- forXml "false" $ \cursor -> do
    --   it "should have correct value"      $ xmlValueVia (Just cursor) `shouldBe` Right (JsonBool False)
    -- forXml "null" $ \cursor -> do
    --   it "should have correct value"      $ xmlValueVia (Just cursor) `shouldBe` Right JsonNull
    -- forXml "[null]" $ \cursor -> do
    --   it "should have correct value"      $ xmlValueVia (Just cursor) `shouldBe` Right (JsonArray [JsonNull])
    --   it "should have correct value"      $ xmlValueVia (fc   cursor) `shouldBe` Right  JsonNull
    --   it "depth at top"                   $ cd          cursor `shouldBe` Just 1
    --   it "depth at first child of array"  $ (fc >=> cd) cursor `shouldBe` Just 2
    -- forXml "[null, {\"field\": 1}]" $ \cursor -> do
    --   it "cursor can navigate to second child of array" $ do
    --     xmlValueVia ((fc >=> ns)   cursor) `shouldBe` Right (                     JsonObject [("field", JsonNumber 1)] )
    --     xmlValueVia (Just          cursor) `shouldBe` Right (JsonArray [JsonNull, JsonObject [("field", JsonNumber 1)]])
    --   it "depth at second child of array" $ do
    --     (fc >=> ns >=> cd) cursor `shouldBe` Just 2
    --   it "depth at first child of object at second child of array" $ do
    --     (fc >=> ns >=> fc >=> cd) cursor `shouldBe` Just 3
    --   it "depth at first child of object at second child of array" $ do
    --     (fc >=> ns >=> fc >=> ns >=> cd) cursor `shouldBe` Just 3
    -- describe "For empty json array" $ do
    --   let cursor =  "[]" :: XmlCursor BS.ByteString t u
    --   it "can navigate down and forwards" $ do
    --     xmlValueVia (Just cursor) `shouldBe` Right (JsonArray [])
    -- describe "For empty json array" $ do
    --   let cursor =  "[null]" :: XmlCursor BS.ByteString t u
    --   it "can navigate down and forwards" $ do
    --     xmlValueVia (Just cursor) `shouldBe` Right (JsonArray [JsonNull])
    -- describe "For sample Json" $ do
    --   let cursor =  "{ \
    --                 \    \"widget\": { \
    --                 \        \"debug\": \"on\", \
    --                 \        \"window\": { \
    --                 \            \"name\": \"main_window\", \
    --                 \            \"dimensions\": [500, 600.01e-02, true, false, null] \
    --                 \        } \
    --                 \    } \
    --                 \}" :: XmlCursor BS.ByteString t u
    --   it "can navigate down and forwards" $ do
    --     let array   = JsonArray [JsonNumber 500, JsonNumber 600.01e-02, JsonBool True, JsonBool False, JsonNull] :: JsonValue
    --     let object1 = JsonObject ([("name", JsonString "main_window"), ("dimensions", array)]) :: JsonValue
    --     let object2 = JsonObject ([("debug", JsonString "on"), ("window", object1)]) :: JsonValue
    --     let object3 = JsonObject ([("widget", object2)]) :: JsonValue
    --     xmlValueVia (Just                                                                                                   cursor) `shouldBe` Right object3
    --     xmlValueVia ((fc                                                                                                  ) cursor) `shouldBe` Right (JsonString "widget"      )
    --     xmlValueVia ((fc >=> ns                                                                                           ) cursor) `shouldBe` Right (object2                  )
    --     xmlValueVia ((fc >=> ns >=> fc                                                                                    ) cursor) `shouldBe` Right (JsonString "debug"       )
    --     xmlValueVia ((fc >=> ns >=> fc >=> ns                                                                             ) cursor) `shouldBe` Right (JsonString "on"          )
    --     xmlValueVia ((fc >=> ns >=> fc >=> ns >=> ns                                                                      ) cursor) `shouldBe` Right (JsonString "window"      )
    --     xmlValueVia ((fc >=> ns >=> fc >=> ns >=> ns >=> ns                                                               ) cursor) `shouldBe` Right (object1                  )
    --     xmlValueVia ((fc >=> ns >=> fc >=> ns >=> ns >=> ns >=> fc                                                        ) cursor) `shouldBe` Right (JsonString "name"        )
    --     xmlValueVia ((fc >=> ns >=> fc >=> ns >=> ns >=> ns >=> fc >=> ns                                                 ) cursor) `shouldBe` Right (JsonString "main_window" )
    --     xmlValueVia ((fc >=> ns >=> fc >=> ns >=> ns >=> ns >=> fc >=> ns >=> ns                                          ) cursor) `shouldBe` Right (JsonString "dimensions"  )
    --     xmlValueVia ((fc >=> ns >=> fc >=> ns >=> ns >=> ns >=> fc >=> ns >=> ns >=> ns                                   ) cursor) `shouldBe` Right (array                    )
    --     xmlValueVia ((fc >=> ns >=> fc >=> ns >=> ns >=> ns >=> fc >=> ns >=> ns >=> ns >=> fc                            ) cursor) `shouldBe` Right (JsonNumber 500           )
    --     xmlValueVia ((fc >=> ns >=> fc >=> ns >=> ns >=> ns >=> fc >=> ns >=> ns >=> ns >=> fc >=> ns                     ) cursor) `shouldBe` Right (JsonNumber 600.01e-02    )
    --     xmlValueVia ((fc >=> ns >=> fc >=> ns >=> ns >=> ns >=> fc >=> ns >=> ns >=> ns >=> fc >=> ns >=> ns              ) cursor) `shouldBe` Right (JsonBool True            )
    --     xmlValueVia ((fc >=> ns >=> fc >=> ns >=> ns >=> ns >=> fc >=> ns >=> ns >=> ns >=> fc >=> ns >=> ns >=> ns       ) cursor) `shouldBe` Right (JsonBool False           )
    --     xmlValueVia ((fc >=> ns >=> fc >=> ns >=> ns >=> ns >=> fc >=> ns >=> ns >=> ns >=> fc >=> ns >=> ns >=> ns >=> ns) cursor) `shouldBe` Right JsonNull