content: -- 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 GADTs #-}
  {-# LANGUAGE OverloadedStrings #-}
  
  module Duckling.Ordinal.SV.Rules
    ( rules ) where
  
  import Control.Monad (join)
  import Data.HashMap.Strict ( HashMap)
  import Data.String
  import Data.Text (Text)
  import Prelude
  import qualified Data.HashMap.Strict as HashMap
  import qualified Data.Text as Text
  
  import Duckling.Dimensions.Types
  import Duckling.Numeral.Helpers (parseInt)
  import Duckling.Ordinal.Helpers
  import Duckling.Regex.Types
  import Duckling.Types
  
  ordinalsMap :: HashMap Text Int
  ordinalsMap = HashMap.fromList
    [ ( "första", 1 )
    , ( "förste", 1 )
    , ( "andra", 2 )
    , ( "andre", 2)
    , ( "tredje", 3 )
    , ( "fjärde", 4 )
    , ( "femte", 5 )
    , ( "sjätte", 6 )
    , ( "sjunde", 7 )
    , ( "åttonde", 8 )
    , ( "nionde", 9 )
    , ( "tionde", 10 )
    , ( "elfte", 11 )
    , ( "tolfte", 12 )
    , ( "trettonde", 13 )
    , ( "fjortonde", 14 )
    , ( "femtonde", 15 )
    , ( "sextonde", 16 )
    , ( "sjuttonde", 17 )
    , ( "artonde", 18 )
    , ( "nittonde", 19 )
    , ( "tjugonde", 20 )
    , ( "trettionde", 30 )
    , ( "fyrtionde", 40 )
    , ( "femtionde", 50 )
    , ( "sextionde", 60 )
    , ( "sjuttionde", 70 )
    , ( "åttionde", 80 )
    , ( "nittionde", 90 )
    ]
  
  cardinalsMap :: HashMap Text Int
  cardinalsMap = HashMap.fromList
    [ ( "tjugo", 20 )
    , ( "trettio", 30 )
    , ( "fyrtio", 40 )
    , ( "femtio", 50 )
    , ( "sextio", 60 )
    , ( "sjuttio", 70 )
    , ( "åttio", 80 )
    , ( "nittio", 90 )
    ]
  
  ruleOrdinals :: Rule
  ruleOrdinals = Rule
    { name = "ordinals (first..twentieth,thirtieth,...)"
    , pattern =
      [ regex "(första|förste|andra|andre|tredje|fjärde|femte|sjätte|sjunde|åttonde|nionde|tionde|elfte|tolfte|trettionde|fjortonde|femtonde|sextonde|sjuttonde|artonde|nittonde|tjugonde|trettionde|fyrtionde|femtonde|sextionde|sjuttionde|åttionde|nittionde)"
      ]
    , prod = \tokens -> case tokens of
        (Token RegexMatch (GroupMatch (match:_)):_) ->
          ordinal <$> HashMap.lookup (Text.toLower match) ordinalsMap
        _ -> Nothing
      }
  
  ruleCompositeOrdinals :: Rule
  ruleCompositeOrdinals = Rule
    { name = "ordinals (composite, e.g., eighty-seven)"
    , pattern =
      [ regex "(tjugo|trettio|fyrtio|femtio|sextio|sjuttio|åttio|nittio)(första|förste|andra|andre|tredje|fjärde|femte|sjätte|sjunde|åttonde|nionde)"
      ]
    , prod = \tokens -> case tokens of
        (Token RegexMatch (GroupMatch (tens:units:_)):_) -> do
          tt <- HashMap.lookup (Text.toLower tens) cardinalsMap
          uu <- HashMap.lookup (Text.toLower units) ordinalsMap
          Just . ordinal $ tt + uu
        _ -> Nothing
    }
  
  ruleOrdinalDigits :: Rule
  ruleOrdinalDigits = Rule
    { name = "ordinal (digits)"
    , pattern =
      [ regex "0*(\\d+):?(a|e)"
      ]
    , prod = \tokens -> case tokens of
        (Token RegexMatch (GroupMatch (match:_)):_) -> ordinal <$> parseInt match
        _ -> Nothing
    }
  
  rules :: [Rule]
  rules =
    [ ruleOrdinals
    , ruleCompositeOrdinals
    , ruleOrdinalDigits
    ]
  