{-# OPTIONS_GHC -fno-warn-orphans #-}
{-
	Copyright (C) 2018 Dr. Alistair Ward

	This file is part of BishBosh.

	BishBosh is free software: you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.

	BishBosh is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with BishBosh.  If not, see <http://www.gnu.org/licenses/>.
-}
{- |
 [@AUTHOR@]	Dr. Alistair Ward

 [@DESCRIPTION@]	Implements 'Test.QuickCheck.Arbitrary' & defines /QuickCheck/-properties.
-}

module BishBosh.Test.QuickCheck.Search.KillerMoves(
-- * Types
-- ** Type-synonyms
--	Key,
	KillerMoves,
-- * Constants
	results
-- * Functions
--	normalise,
--	populate
) where

import			BishBosh.Test.QuickCheck.Component.Turn()
import			Control.Arrow((&&&))
import qualified	BishBosh.Component.Move		as Component.Move
import qualified	BishBosh.Property.Empty		as Property.Empty
import qualified	BishBosh.Search.DynamicMoveData	as Search.DynamicMoveData
import qualified	BishBosh.Search.EphemeralData	as Search.EphemeralData
import qualified	BishBosh.Search.KillerMoves	as Search.KillerMoves
import qualified	BishBosh.Types			as T
import qualified	Test.QuickCheck

-- | Defines a concrete type for testing.
type KillerMoveKey	= Search.DynamicMoveData.KillerMoveKey T.X T.Y

instance (
	Enum				x,
	Enum				y,
	Ord				x,
	Ord				y,
	Test.QuickCheck.Arbitrary	x,
	Test.QuickCheck.Arbitrary	y
 ) => Test.QuickCheck.Arbitrary (Search.DynamicMoveData.KillerMoveKey x y) where
--	{-# SPECIALISE instance Test.QuickCheck.Arbitrary KillerMoveKey #-}
	arbitrary	= fmap Search.DynamicMoveData.mkKillerMoveKeyFromTurn Test.QuickCheck.arbitrary

normalise :: Int -> Component.Move.NPlies
normalise	= succ . (`mod` 4)

populate :: Ord key => [(Component.Move.NPlies, key)] -> Search.KillerMoves.KillerMoves key
populate	= foldr (\(nPlies, killerMoveKey) -> Search.KillerMoves.insert (normalise nPlies) killerMoveKey) Property.Empty.empty {-KillerMoves-}

-- | Defines a concrete type for testing.
type KillerMoves	= Search.KillerMoves.KillerMoves KillerMoveKey

instance (
	Enum				key,
	Ord				key,
	Test.QuickCheck.Arbitrary	key
 ) => Test.QuickCheck.Arbitrary (Search.KillerMoves.KillerMoves key) where
	arbitrary	= fmap populate Test.QuickCheck.arbitrary

-- | The constant test-results for this data-type.
results :: IO [Test.QuickCheck.Result]
results	= sequence [
	let
		f :: [(Component.Move.NPlies, KillerMoveKey)] -> Test.QuickCheck.Property
		f	= Test.QuickCheck.label "KillerMoves.prop_insert/getNMoves" . uncurry (==) . (Search.EphemeralData.getSize . populate &&& length)
	in Test.QuickCheck.quickCheckWithResult Test.QuickCheck.stdArgs { Test.QuickCheck.maxSuccess = 256 } f
 ]