-- 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. An additional grant
-- of patent rights can be found in the PATENTS file in the same directory.

{-# LANGUAGE GADTs #-}
{-# LANGUAGE OverloadedStrings #-}

module Duckling.Numeral.HE.Rules
  ( rules ) where

import Data.Maybe
import Data.String
import Data.Text (Text)
import Prelude
import qualified Data.Text as Text

import Duckling.Dimensions.Types
import Duckling.Numeral.Helpers
import Duckling.Numeral.Types (NumeralData (..))
import Duckling.Regex.Types
import Duckling.Types
import qualified Duckling.Numeral.Types as TNumeral

ruleInteger5 :: Rule
ruleInteger5 = Rule
  { name = "integer 4"
  , pattern =
    [ regex "(\x05d0\x05e8\x05d1\x05e2(\x05d4)?)"
    ]
  , prod = \_ -> integer 4
  }

ruleIntersectNumerals :: Rule
ruleIntersectNumerals = Rule
  { name = "intersect numbers"
  , pattern =
    [ numberWith (fromMaybe 0 . TNumeral.grain) (>1)
    , numberWith TNumeral.multipliable not
    ]
  , prod = \tokens -> case tokens of
      (Token Numeral (NumeralData {TNumeral.value = val1, TNumeral.grain = Just g}):
       Token Numeral (NumeralData {TNumeral.value = val2}):
       _) | (10 ** fromIntegral g) > val2 -> double $ val1 + val2
      _ -> Nothing
  }

ruleIntersectWithAnd :: Rule
ruleIntersectWithAnd = Rule
  { name = "intersect (with and)"
  , pattern =
    [ numberWith (fromMaybe 0 . TNumeral.grain) (>1)
    , regex "\x05d5"
    , numberWith TNumeral.multipliable not
    ]
  , prod = \tokens -> case tokens of
      (Token Numeral (NumeralData {TNumeral.value = val1, TNumeral.grain = Just g}):
       _:
       Token Numeral (NumeralData {TNumeral.value = val2}):
       _) | (10 ** fromIntegral g) > val2 -> double $ val1 + val2
      _ -> Nothing
  }

ruleCompositeTens :: Rule
ruleCompositeTens = Rule
  { name = "integer 21..99"
  , pattern =
    [ oneOf [ 20, 30..90 ]
    , numberBetween 1 10
    ]
  , prod = \tokens -> case tokens of
      (Token Numeral (NumeralData {TNumeral.value = tens}):
       Token Numeral (NumeralData {TNumeral.value = units}):
       _) -> double $ tens + units
      _ -> Nothing
  }

ruleCompositeTensWithAnd :: Rule
ruleCompositeTensWithAnd = Rule
  { name = "integer 21..99 (with and)"
  , pattern =
    [ oneOf [ 20, 30..90 ]
    , regex "\x05d5"
    , numberBetween 1 10
    ]
  , prod = \tokens -> case tokens of
      (Token Numeral (NumeralData {TNumeral.value = tens}):
       _:
       Token Numeral (NumeralData {TNumeral.value = units}):
       _) -> double $ tens + units
      _ -> Nothing
  }

ruleNumeralsPrefixWithNegativeOrMinus :: Rule
ruleNumeralsPrefixWithNegativeOrMinus = Rule
  { name = "numbers prefix with -, negative or minus"
  , pattern =
    [ regex "-|\x05de\x05d9\x05e0\x05d5\x05e1"
    , dimension Numeral
    ]
  , prod = \tokens -> case tokens of
      (_:Token Numeral nd:_) -> double (TNumeral.value nd * (-1))
      _ -> Nothing
  }

ruleIntegerNumeric :: Rule
ruleIntegerNumeric = Rule
  { name = "integer (numeric)"
  , pattern =
    [ regex "(\\d{1,18})"
    ]
  , prod = \tokens -> case tokens of
      (Token RegexMatch (GroupMatch (match:_)):_) -> do
        v <- toInteger <$> parseInt match
        integer v
      _ -> Nothing
  }

ruleInteger10 :: Rule
ruleInteger10 = Rule
  { name = "integer 9"
  , pattern =
    [ regex "(\x05ea\x05e9\x05e2(\x05d4)?)"
    ]
  , prod = \_ -> integer 9
  }

ruleInteger15 :: Rule
ruleInteger15 = Rule
  { name = "integer (20..90)"
  , pattern =
    [ regex "(\x05e2\x05e9\x05e8\x05d9\x05dd|\x05e9\x05dc\x05d5\x05e9\x05d9\x05dd|\x05d0\x05e8\x05d1\x05e2\x05d9\x05dd|\x05d7\x05de\x05d9\x05e9\x05d9\x05dd|\x05e9\x05d9\x05e9\x05d9\x05dd|\x05e9\x05d1\x05e2\x05d9\x05dd|\x05e9\x05de\x05d5\x05e0\x05d9\x05dd|\x05ea\x05e9\x05e2\x05d9\x05dd)"
    ]
  , prod = \tokens -> case tokens of
      (Token RegexMatch (GroupMatch (match:_)):_) -> case match of
        "\x05e2\x05e9\x05e8\x05d9\x05dd" -> integer 20
        "\x05e9\x05dc\x05d5\x05e9\x05d9\x05dd" -> integer 30
        "\x05d0\x05e8\x05d1\x05e2\x05d9\x05dd" -> integer 40
        "\x05d7\x05de\x05d9\x05e9\x05d9\x05dd" -> integer 50
        "\x05e9\x05d9\x05e9\x05d9\x05dd" -> integer 60
        "\x05e9\x05d1\x05e2\x05d9\x05dd" -> integer 70
        "\x05e9\x05de\x05d5\x05e0\x05d9\x05dd" -> integer 80
        "\x05ea\x05e9\x05e2\x05d9\x05dd" -> integer 90
        _ -> Nothing
      _ -> Nothing
  }

ruleDecimalNumeral :: Rule
ruleDecimalNumeral = Rule
  { name = "decimal number"
  , pattern =
    [ regex "(\\d*\\.\\d+)"
    ]
  , prod = \tokens -> case tokens of
      (Token RegexMatch (GroupMatch (match:_)):_) -> parseDecimal True match
      _ -> Nothing
  }

ruleInteger3 :: Rule
ruleInteger3 = Rule
  { name = "integer 2"
  , pattern =
    [ regex "(\x05e9\x05ea\x05d9\x05d9\x05dd|\x05e9\x05e0\x05d9\x05d9\x05dd)"
    ]
  , prod = \_ -> integer 2
  }

ruleSingle :: Rule
ruleSingle = Rule
  { name = "single"
  , pattern =
    [ regex "\x05d9\x05d7\x05d9\x05d3"
    ]
  , prod = \_ -> integer 1
  }

ruleInteger13 :: Rule
ruleInteger13 = Rule
  { name = "integer 12"
  , pattern =
    [ regex "(\x05e9\x05e0\x05d9\x05d9\x05dd \x05e2\x05e9\x05e8|\x05ea\x05e8\x05d9 \x05e2\x05e9\x05e8)"
    ]
  , prod = \_ -> integer 12
  }

ruleMultiply :: Rule
ruleMultiply = Rule
  { name = "compose by multiplication"
  , pattern =
    [ dimension Numeral
    , numberWith TNumeral.multipliable id
    ]
  , prod = \tokens -> case tokens of
      (token1:token2:_) -> multiply token1 token2
      _ -> Nothing
  }

ruleInteger6 :: Rule
ruleInteger6 = Rule
  { name = "integer 5"
  , pattern =
    [ regex "(\x05d7\x05de(\x05e9|\x05d9\x05e9\x05d4))"
    ]
  , prod = \_ -> integer 5
  }

rulePowersOfTen :: Rule
rulePowersOfTen = Rule
  { name = "powers of tens"
  , pattern =
    [ regex "(\x05de\x05d0(\x05d4|\x05d5\x05ea)|\x05d0\x05dc(\x05e3|\x05e4\x05d9\x05dd)|\x05de\x05d9\x05dc\x05d9\x05d5(\x05df|\x05e0\x05d9\x05dd))"
    ]
  , prod = \tokens -> case tokens of
      (Token RegexMatch (GroupMatch (match:_)):_) -> case Text.toLower match of
        "\x05de\x05d0\x05d4"                               ->
          double 1e2 >>= withGrain 2 >>= withMultipliable
        "\x05de\x05d0\x05d5\x05ea"                         ->
          double 1e2 >>= withGrain 2 >>= withMultipliable
        "\x05d0\x05dc\x05e3"                               ->
          double 1e3 >>= withGrain 3 >>= withMultipliable
        "\x05d0\x05dc\x05e4\x05d9\x05dd"                   ->
          double 1e3 >>= withGrain 3 >>= withMultipliable
        "\x05de\x05d9\x05dc\x05d9\x05d5\x05df"             ->
          double 1e6 >>= withGrain 6 >>= withMultipliable
        "\x05de\x05d9\x05dc\x05d9\x05d5\x05e0\x05d9\x05dd" ->
          double 1e6 >>= withGrain 6 >>= withMultipliable
        _          -> Nothing
      _ -> Nothing
  }

ruleInteger7 :: Rule
ruleInteger7 = Rule
  { name = "integer 6"
  , pattern =
    [ regex "(\x05e9\x05e9(\x05d4)?)"
    ]
  , prod = \_ -> integer 6
  }

ruleInteger14 :: Rule
ruleInteger14 = Rule
  { name = "integer 11..19"
  , pattern =
    [ numberBetween 1 10
    , numberWith TNumeral.value (== 10)
    ]
  , prod = \tokens -> case tokens of
      (Token Numeral (NumeralData {TNumeral.value = v1}):
       Token Numeral (NumeralData {TNumeral.value = v2}):
       _) -> double $ v1 + v2
      _ -> Nothing
  }

ruleInteger8 :: Rule
ruleInteger8 = Rule
  { name = "integer 7"
  , pattern =
    [ regex "(\x05e9\x05d1\x05e2(\x05d4)?)"
    ]
  , prod = \_ -> integer 7
  }

ruleCouple :: Rule
ruleCouple = Rule
  { name = "couple"
  , pattern =
    [ regex "\x05d6\x05d5\x05d2( \x05e9\x05dc)?"
    ]
  , prod = \_ -> integer 2
  }

ruleInteger16 :: Rule
ruleInteger16 = Rule
  { name = "integer 101..999"
  , pattern =
    [ oneOf [300, 600, 500, 100, 800, 200, 900, 700, 400]
    , numberBetween 1 100
    ]
  , prod = \tokens -> case tokens of
      (Token Numeral (NumeralData {TNumeral.value = v1}):
       Token Numeral (NumeralData {TNumeral.value = v2}):
       _) -> double $ v1 + v2
      _ -> Nothing
  }

ruleInteger9 :: Rule
ruleInteger9 = Rule
  { name = "integer 8"
  , pattern =
    [ regex "(\x05e9\x05de\x05d5\x05e0\x05d4)"
    ]
  , prod = \_ -> integer 8
  }

ruleInteger :: Rule
ruleInteger = Rule
  { name = "integer 0"
  , pattern =
    [ regex "(\x05d0\x05e4\x05e1|\x05db\x05dc\x05d5\x05dd)"
    ]
  , prod = \_ -> integer 0
  }

ruleInteger4 :: Rule
ruleInteger4 = Rule
  { name = "integer 3"
  , pattern =
    [ regex "(\x05e9\x05dc\x05d5\x05e9(\x05d4)?)"
    ]
  , prod = \_ -> integer 3
  }

ruleInteger2 :: Rule
ruleInteger2 = Rule
  { name = "integer 1"
  , pattern =
    [ regex "(\x05d0\x05d7\x05d3|\x05d0\x05d7\x05ea)"
    ]
  , prod = \_ -> integer 1
  }

ruleInteger11 :: Rule
ruleInteger11 = Rule
  { name = "integer 10"
  , pattern =
    [ regex "(\x05e2\x05e9\x05e8(\x05d4)?)"
    ]
  , prod = \_ -> integer 10
  }

ruleNumeralDotNumeral :: Rule
ruleNumeralDotNumeral = Rule
  { name = "number dot number"
  , pattern =
    [ dimension Numeral
    , regex "\x05e0\x05e7\x05d5\x05d3\x05d4"
    , numberWith TNumeral.grain isNothing
    ]
  , prod = \tokens -> case tokens of
      (Token Numeral nd1:_:Token Numeral nd2:_) ->
        double $ TNumeral.value nd1 + decimalsToDouble (TNumeral.value nd2)
      _ -> Nothing
  }

ruleCommas :: Rule
ruleCommas = Rule
  { name = "comma-separated numbers"
  , pattern =
    [ regex "(\\d+(,\\d\\d\\d)+(\\.\\d+)?)"
    ]
  , prod = \tokens -> case tokens of
      (Token RegexMatch (GroupMatch (match:_)):_) ->
        parseDouble (Text.replace (Text.singleton ',') Text.empty match) >>= double
      _ -> Nothing
  }

rules :: [Rule]
rules =
  [ ruleCommas
  , ruleCompositeTens
  , ruleCompositeTensWithAnd
  , ruleCouple
  , ruleDecimalNumeral
  , ruleInteger
  , ruleInteger10
  , ruleInteger11
  , ruleInteger13
  , ruleInteger14
  , ruleInteger15
  , ruleInteger16
  , ruleInteger2
  , ruleInteger3
  , ruleInteger4
  , ruleInteger5
  , ruleInteger6
  , ruleInteger7
  , ruleInteger8
  , ruleInteger9
  , ruleIntegerNumeric
  , ruleIntersectNumerals
  , ruleIntersectWithAnd
  , ruleMultiply
  , ruleNumeralDotNumeral
  , ruleNumeralsPrefixWithNegativeOrMinus
  , rulePowersOfTen
  , ruleSingle
  ]