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 LambdaCase #-}
  {-# LANGUAGE OverloadedStrings #-}
  
  module Duckling.AmountOfMoney.CA.Rules
    ( rules
    ) where
  
  import Data.Maybe
  import Data.String
  import Prelude
  
  import Duckling.AmountOfMoney.Helpers
  import Duckling.AmountOfMoney.Types (Currency(..), AmountOfMoneyData (..))
  import Duckling.Dimensions.Types
  import Duckling.Numeral.Helpers (isNatural, isPositive)
  import Duckling.Numeral.Types (NumeralData (..))
  import Duckling.Types
  import qualified Duckling.AmountOfMoney.Types as TAmountOfMoney
  import qualified Duckling.Numeral.Types as TNumeral
  
  ruleUnitAmount :: Rule
  ruleUnitAmount = Rule
    { name = "<unit> <amount>"
    , pattern =
      [ Predicate isCurrencyOnly
      , Predicate isPositive
      ]
    , prod = \case
        (Token AmountOfMoney AmountOfMoneyData{TAmountOfMoney.currency = c}:
         Token Numeral NumeralData{TNumeral.value = v}:
         _) -> Just $ Token AmountOfMoney $ withValue v $ currencyOnly c
        _ -> Nothing
    }
  
  ruleDollar :: Rule
  ruleDollar = Rule
    { name = "dollar"
    , pattern =
      [ regex "d(ò|o|ó)lar(s)?"
      ]
    , prod = \_ -> Just $ Token AmountOfMoney $ currencyOnly Dollar
    }
  
  ruleCent :: Rule
  ruleCent = Rule
    { name = "cent"
    , pattern =
      [ regex "c(e|è)ntims?"
      ]
    , prod = \_ -> Just $ Token AmountOfMoney $ currencyOnly Cent
    }
  
  rulePounds :: Rule
  rulePounds = Rule
    { name = "£"
    , pattern =
      [ regex "(lliure|lliura)s?"
      ]
    , prod = \_ -> Just $ Token AmountOfMoney $ currencyOnly Pound
    }
  
  ruleIntersectAndNumeral :: Rule
  ruleIntersectAndNumeral = Rule
    { name = "intersect (and number)"
    , pattern =
      [ Predicate isWithoutCents
      , regex "i"
      , Predicate isNatural
      ]
    , prod = \case
        (Token AmountOfMoney fd:
         _:
         Token Numeral NumeralData{TNumeral.value = c}:
         _) -> Just $ Token AmountOfMoney $ withCents c fd
        _ -> Nothing
    }
  
  ruleIntersectXCents :: Rule
  ruleIntersectXCents = Rule
    { name = "intersect (X cents)"
    , pattern =
      [ Predicate isWithoutCents
      , Predicate isCents
      ]
    , prod = \case
        (Token AmountOfMoney fd:
         Token AmountOfMoney AmountOfMoneyData{TAmountOfMoney.value = Just c}:
         _) -> Just $ Token AmountOfMoney $ withCents c fd
        _ -> Nothing
    }
  
  ruleIntersectAndXCents :: Rule
  ruleIntersectAndXCents = Rule
    { name = "intersect (and X cents)"
    , pattern =
      [ Predicate isWithoutCents
      , regex "i"
      , Predicate isCents
      ]
    , prod = \case
        (Token AmountOfMoney fd:
         _:
         Token AmountOfMoney AmountOfMoneyData{TAmountOfMoney.value = Just c}:
         _) -> Just $ Token AmountOfMoney $ withCents c fd
        _ -> Nothing
    }
  
  ruleIntersect :: Rule
  ruleIntersect = Rule
    { name = "intersect"
    , pattern =
      [ Predicate isWithoutCents
      , Predicate isNatural
      ]
    , prod = \case
        (Token AmountOfMoney fd:
         Token Numeral NumeralData{TNumeral.value = c}:
         _) -> Just $ Token AmountOfMoney $ withCents c fd
        _ -> Nothing
    }
  
  ruleIntervalBetweenNumeral :: Rule
  ruleIntervalBetweenNumeral = Rule
    { name = "between|from <numeral> to|and <amount-of-money>"
    , pattern =
      [ regex "des de|des d'|entre"
      , Predicate isPositive
      , regex "fins a|i"
      , Predicate isSimpleAmountOfMoney
      ]
    , prod = \case
        (_:
         Token Numeral NumeralData{TNumeral.value = from}:
         _:
         Token AmountOfMoney AmountOfMoneyData{TAmountOfMoney.value = Just to,
                                               TAmountOfMoney.currency = c}:
         _) | from < to ->
          Just $ Token AmountOfMoney $ withInterval (from, to) $ currencyOnly c
        _ -> Nothing
    }
  
  ruleIntervalBetween :: Rule
  ruleIntervalBetween = Rule
    { name = "between|from <amount-of-money> to|and <amount-of-money>"
    , pattern =
      [ regex "des de|des d'|entre"
      , Predicate isSimpleAmountOfMoney
      , regex "fins a|i"
      , Predicate isSimpleAmountOfMoney
      ]
    , prod = \case
        (_:
         Token AmountOfMoney AmountOfMoneyData{TAmountOfMoney.value = Just from,
                                               TAmountOfMoney.currency = c1}:
         _:
         Token AmountOfMoney AmountOfMoneyData{TAmountOfMoney.value = Just to,
                                               TAmountOfMoney.currency = c2}:
         _) | from < to && c1 == c2 ->
          Just $ Token AmountOfMoney $ withInterval (from, to) $ currencyOnly c1
        _ -> Nothing
    }
  
  ruleIntervalNumeralDash :: Rule
  ruleIntervalNumeralDash = Rule
    { name = "<numeral> - <amount-of-money>"
    , pattern =
      [ Predicate isNatural
      , regex "-"
      , Predicate isSimpleAmountOfMoney
      ]
    , prod = \case
        (Token Numeral NumeralData{TNumeral.value = from}:
         _:
         Token AmountOfMoney AmountOfMoneyData{TAmountOfMoney.value = Just to,
                                               TAmountOfMoney.currency = c}:
         _) | from < to->
           Just $ Token AmountOfMoney $ withInterval (from, to) $ currencyOnly c
        _ -> Nothing
    }
  
  ruleIntervalDash :: Rule
  ruleIntervalDash = Rule
    { name = "<amount-of-money> - <amount-of-money>"
    , pattern =
      [ Predicate isSimpleAmountOfMoney
      , regex "-"
      , Predicate isSimpleAmountOfMoney
      ]
    , prod = \case
        (Token AmountOfMoney AmountOfMoneyData{TAmountOfMoney.value = Just from,
                                               TAmountOfMoney.currency = c1}:
         _:
         Token AmountOfMoney AmountOfMoneyData{TAmountOfMoney.value = Just to,
                                               TAmountOfMoney.currency = c2}:
         _) | from < to && c1 == c2 ->
          Just $ Token AmountOfMoney $ withInterval (from, to) $ currencyOnly c1
        _ -> Nothing
    }
  
  ruleIntervalMax :: Rule
  ruleIntervalMax = Rule
    { name = "less/no more than <amount-of-money>"
    , pattern =
      [ regex "menys de|no m(e|é)s de|no m(e|é)s d'|menys d'"
      , Predicate isSimpleAmountOfMoney
      ]
    , prod = \case
        (_:
         Token AmountOfMoney AmountOfMoneyData{TAmountOfMoney.value = Just to,
                                               TAmountOfMoney.currency = c}:
         _) -> Just $ Token AmountOfMoney $ withMax to $ currencyOnly c
        _ -> Nothing
    }
  
  ruleIntervalMin :: Rule
  ruleIntervalMin = Rule
    { name = "no less/more than <amount-of-money>"
    , pattern =
      [ regex "m(e|é)s de|no menys de|m(e|é)s d'|no menys d'"
      , Predicate isSimpleAmountOfMoney
      ]
    , prod = \case
        (_:
         Token AmountOfMoney AmountOfMoneyData{TAmountOfMoney.value = Just to,
                                               TAmountOfMoney.currency = c}:
         _) -> Just $ Token AmountOfMoney $ withMin to $ currencyOnly c
        _ -> Nothing
    }
  
  rules :: [Rule]
  rules =
    [ ruleUnitAmount
    , ruleCent
    , ruleDollar
    , ruleIntersect
    , ruleIntersectAndNumeral
    , ruleIntersectAndXCents
    , ruleIntersectXCents
    , rulePounds
    , ruleIntervalBetweenNumeral
    , ruleIntervalBetween
    , ruleIntervalNumeralDash
    , ruleIntervalDash
    , ruleIntervalMax
    , ruleIntervalMin
    ]
  