-- Copyright (c) 2016-present, Facebook, Inc.
-- All rights reserved.
--
-- This source code is licensed under the BSD-style license found in the
-- LICENSE file in the root directory of this source tree.


{-# LANGUAGE NoRebindableSyntax #-}
{-# LANGUAGE OverloadedStrings #-}

module Duckling.Api.Tests
  ( tests
  ) where

import Data.List (sortOn)
import Data.Text (Text)
import Prelude
import Test.Tasty
import Test.Tasty.HUnit
import qualified Data.HashMap.Strict as HashMap
import qualified Data.HashSet as HashSet

import Duckling.Api
import Duckling.Dimensions.Types
import Duckling.Locale
import Duckling.Testing.Asserts
import Duckling.Testing.Types
import Duckling.Types
import qualified Duckling.Numeral.Types as TNumeral

tests :: TestTree
tests = testGroup "API Tests"
  [ parseTest
  , rankTest
  , rangeTest
  , supportedDimensionsTest
  ]

parseTest :: TestTree
parseTest = testCase "Parse Test" $
  case parse sentence testContext testOptions [Seal Numeral] of
    [] -> assertFailure "empty result"
    (Entity dim body (RVal _ v) start end _ _:_) -> do
      assertEqual "dim" "number" dim
      assertEqual "body" "42" body
      assertEqual "value" val (toJText v)
      assertEqual "start" 4 start
      assertEqual "end" 6 end
  where
    sentence = "hey 42 there"
    val = toJText TNumeral.NumeralValue {TNumeral.vValue = 42.0}

rankTest :: TestTree
rankTest = testGroup "Rank Tests"
  [ rankFilterTest
  , rankOrderTest
  ]

rankFilterTest :: TestTree
rankFilterTest = testCase "Rank Filter Tests" $ do
  mapM_ check
    [ ( "in 2 minutes"
      , [Seal Numeral, Seal Duration, Seal Time]
      , [Seal Time]
      )
    , ( "in 2 minutes, about 42 degrees"
      , [Seal Numeral, Seal Temperature, Seal Time]
      , [Seal Time, Seal Temperature]
      )
    , ( "today works... and tomorrow at 9pm too"
      , [Seal Numeral, Seal Time]
      , [Seal Time, Seal Time]
      )
    , ( "between 9:30 and 11:00 on thursday or Saturday and Thanksgiving Day"
      , [Seal Numeral, Seal Time]
      , [Seal Time, Seal Time, Seal Time]
      )
    , ("the day after tomorrow 5pm", [Seal Time], [Seal Time])
    , ("the day after tomorrow 5pm", [Seal Time, Seal Numeral], [Seal Time])
    , ("the day after tomorrow 5pm", [], [Seal Time])
    ]
  where
    check :: (Text, [Seal Dimension], [Seal Dimension]) -> IO ()
    check (sentence, targets, expected) =
      let go = analyze sentence testContext testOptions $ HashSet.fromList targets
          actual = flip map go $
                     \(Resolved{node=Node{token=Token d _}}) -> Seal d
      in assertEqual ("wrong winners for " ++ show sentence) expected actual

rankOrderTest :: TestTree
rankOrderTest = testCase "Rank Order Tests" $ do
  mapM_ check
    [ ("tomorrow at 5PM or 8PM", [Seal Time])
    , ("321 12 3456 ... 7", [Seal Numeral])
    , ("42 today 23 tomorrow", [Seal Numeral, Seal Time])
    ]
  where
    check (s, targets) =
      let tokens = analyze s testContext testOptions $ HashSet.fromList targets
        in assertEqual "wrong ordering" (sortOn range tokens) tokens

rangeTest :: TestTree
rangeTest = testCase "Range Tests" $ do
  mapM_ (analyzedFirstTest testContext testOptions) xs
  where
    xs = map (\(input, targets, range) -> (input, targets, f range))
             [ ( "order status 3233763377", [Seal PhoneNumber], Range 13 23 )
             , ( "  3233763377  "         , [Seal PhoneNumber], Range  2 12 )
             , ( " -3233763377"           , [Seal PhoneNumber], Range  2 12 )
             , ( "  now"                  , [Seal Time]       , Range  2  5 )
             , ( "   Monday  "            , [Seal Time]       , Range  3  9 )
             , ( "  next   week "         , [Seal Time]       , Range  2 13 )
             , ( "   42\n\n"              , [Seal Numeral]    , Range  3  5 )
             ]
    f :: Range -> TestPredicate
    f expected _ (Resolved {range = actual}) = expected == actual

supportedDimensionsTest :: TestTree
supportedDimensionsTest = testCase "Supported Dimensions Test" $ do
  mapM_ check
    [ ( AR
      , [ Seal Email, Seal AmountOfMoney, Seal PhoneNumber, Seal Url
        , Seal Duration, Seal Numeral, Seal Ordinal, Seal Time, Seal Volume
        , Seal Temperature, Seal Quantity, Seal CreditCardNumber
        ]
      )
    , ( PL
      , [ Seal Email, Seal AmountOfMoney, Seal PhoneNumber, Seal Url
        , Seal Duration, Seal Numeral, Seal Ordinal, Seal Time
        , Seal CreditCardNumber
        ]
      )
    ]
  where
    check :: (Lang, [Seal Dimension]) -> IO ()
    check (l, expected) = case HashMap.lookup l supportedDimensions of
      Nothing -> assertFailure $ "no dimensions for " ++ show l
      Just actual ->
        assertEqual ("wrong dimensions for " ++ show l)
        (HashSet.fromList expected) (HashSet.fromList actual)