-- This file is part of Goatee.
--
-- Copyright 2014 Bryan Gardiner
--
-- Goatee is free software: you can redistribute it and/or modify
-- it under the terms of the GNU Affero General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- (at your option) any later version.
--
-- Goatee 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 Affero General Public License for more details.
--
-- You should have received a copy of the GNU Affero General Public License
-- along with Goatee.  If not, see <http://www.gnu.org/licenses/>.

module Game.Goatee.Sgf.TreeTest (tests) where

import Data.Version (showVersion)
import Game.Goatee.App (applicationName)
import Game.Goatee.Sgf.Property
import Game.Goatee.Sgf.TestInstances ()
import Game.Goatee.Sgf.Tree
import Game.Goatee.Sgf.Types
import Game.Goatee.Test.Common
import Paths_goatee (version)
import Test.Framework (testGroup)
import Test.Framework.Providers.HUnit (testCase)
import Test.HUnit ((@=?), (@?=))

tests = testGroup "Game.Goatee.Sgf.Tree" [
  emptyNodeTests,
  rootNodeTests,
  findPropertyTests,
  addPropertyTests,
  addChildTests
  ]

emptyNodeTests = testGroup "emptyNode" [
  testCase "has no properties" $ [] @=? nodeProperties emptyNode,
  testCase "has no children" $ [] @=? nodeChildren emptyNode
  ]

rootNodeTests = testGroup "rootNode" [
  testCase "sets SZ correctly" $ do
    assertElem (SZ 9 9) $ nodeProperties $ rootNode $ Just (9, 9)
    assertElem (SZ 19 19) $ nodeProperties $ rootNode $ Just (19, 19)
    assertElem (SZ 9 5) $ nodeProperties $ rootNode $ Just (9, 5),

  testCase "sets AP correctly" $ do
    let ap = AP (toSimpleText applicationName)
                (toSimpleText $ showVersion version)
    assertElem ap $ nodeProperties $ rootNode Nothing
    assertElem ap $ nodeProperties $ rootNode $ Just (9, 9)
  ]

findPropertyTests = testGroup "findProperty" [
  testCase "returns Nothing for an empty node" $
    Nothing @=? findProperty propertyB (mk []),

  testCase "returns Nothing if no properties match" $
    Nothing @=? findProperty propertyB (mk [FF 4, GM 1, ST defaultVariationMode, SZ 9 9]),

  testCase "finds present properties" $ do
     Just (B (Just (2,3))) @=?
       findProperty propertyB (mk [B (Just (2,3))])
     Just (W Nothing) @=?
       findProperty propertyW (mk [B Nothing, W Nothing])
     Just IT @=?
       findProperty propertyIT (mk [IT, GW Double2])
     Just (GW Double2) @=?
       findProperty propertyGW (mk [IT, GW Double2]),

  testCase "doesn't find absent properties" $ do
    Nothing @=? findProperty propertyW (mk [B Nothing])
    Nothing @=? findProperty propertyW (mk [FF 4, GM 1, ST defaultVariationMode, SZ 9 9])
  ]
  where mk properties = emptyNode { nodeProperties = properties }

addPropertyTests = testGroup "addProperty" [
  testCase "adds properties in order" $ do
    let prop1 = B (Just (6,6))
        prop2 = RE GameResultVoid
        prop3 = C (toText "Game over.")
        node1 = addProperty prop1 emptyNode
        node2 = addProperty prop2 node1
        node3 = addProperty prop3 node2
    node1 @?= emptyNode { nodeProperties = [prop1] }
    node2 @?= emptyNode { nodeProperties = [prop1, prop2] }
    node3 @?= emptyNode { nodeProperties = [prop1, prop2, prop3] }
  ]

addChildTests = testGroup "addChild" [
  testCase "adds children in order" $ do
    let node1 = emptyNode { nodeProperties = [B (Just (0,0))] }
        node2 = emptyNode { nodeProperties = [W (Just (1,1))] }
        node3 = emptyNode { nodeProperties = [B (Just (2,2))] }
        node4 = emptyNode { nodeProperties = [W Nothing] }
        node2' = addChild node3 node2
        node1' = addChild node2' node1
        node1'' = addChild node4 node1'
    node1'' @?= mk [B (Just (0,0))]
                   [mk [W (Just (1,1))]
                       [mk [B (Just (2,2))]
                           []],
                    mk [W Nothing]
                       []]
  ]
  where mk properties children = emptyNode { nodeProperties = properties
                                           , nodeChildren = children
                                           }

-- TODO Test validateNode.