-- 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.JA.Rules
  ( rules ) where

import qualified Data.HashMap.Strict as HashMap
import qualified Data.Text as Text
import Data.HashMap.Strict (HashMap)
import Data.Text (Text)
import Prelude
import Data.String

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

ruleInteger5 :: Rule
ruleInteger5 = Rule
  { name = "integer (100)"
  , pattern =
    [ regex "百"
    ]
  , prod = \_ -> integer 100
  }

ruleNumeralsPrefixWithNegativeOrMinus :: Rule
ruleNumeralsPrefixWithNegativeOrMinus = Rule
  { name = "numbers prefix with -, negative or minus"
  , pattern =
    [ regex "-|マイナス\\s?|負\\s?"
    , 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 (1000..1999)"
  , pattern =
    [ regex "千"
    , numberBetween 1 1000
    ]
  , prod = \tokens -> case tokens of
      (_:Token Numeral (NumeralData {TNumeral.value = v}):_) ->
        double $ v + 1000
      _ -> Nothing
  }

ruleDecimalWithThousandsSeparator :: Rule
ruleDecimalWithThousandsSeparator = Rule
  { name = "decimal with thousands separator"
  , 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
  }

ruleInteger15 :: Rule
ruleInteger15 = Rule
  { name = "integer (20000..90000)"
  , pattern =
    [ numberBetween 2 10
    , regex "万"
    ]
  , prod = \tokens -> case tokens of
      (Token Numeral (NumeralData {TNumeral.value = v}):_) -> double $ v * 10000
      _ -> 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
  }

ruleNumeral :: Rule
ruleNumeral = Rule
  { name = "<number>个"
  , pattern =
    [ dimension Numeral
    , regex "个"
    ]
  , prod = \tokens -> case tokens of
      (token:_) -> Just token
      _ -> Nothing
  }

ruleInteger3 :: Rule
ruleInteger3 = Rule
  { name = "integer (20..90)"
  , pattern =
    [ numberBetween 2 10
    , regex "十"
    ]
  , prod = \tokens -> case tokens of
      (Token Numeral (NumeralData {TNumeral.value = v}):_) -> double $ v * 10
      _ -> Nothing
  }

ruleInteger13 :: Rule
ruleInteger13 = Rule
  { name = "integer (10000)"
  , pattern =
    [ regex "万"
    ]
  , prod = \_ -> integer 10000
  }

ruleInteger6 :: Rule
ruleInteger6 = Rule
  { name = "integer (100..199)"
  , pattern =
    [ regex "百"
    , numberBetween 1 100
    ]
  , prod = \tokens -> case tokens of
      (_:Token Numeral (NumeralData {TNumeral.value = v}):_) -> double $ v + 100
      _ -> Nothing
  }

ruleInteger12 :: Rule
ruleInteger12 = Rule
  { name = "integer 2001..9999"
  , pattern =
    [ oneOf [3000, 9000, 7000, 8000, 2000, 4000, 6000, 5000]
    , numberBetween 1 1000
    ]
  , prod = \tokens -> case tokens of
      (Token Numeral (NumeralData {TNumeral.value = v1}):
       Token Numeral (NumeralData {TNumeral.value = v2}):
       _) -> double $ v1 + v2
      _ -> Nothing
  }

ruleNumeralsSuffixesKMG :: Rule
ruleNumeralsSuffixesKMG = Rule
  { name = "numbers suffixes (K, M, G, 千, 万)"
  , pattern =
    [ dimension Numeral
    , regex "(k|m|g|千|万)"
    ]
  , prod = \tokens -> case tokens of
      (Token Numeral (NumeralData {TNumeral.value = v}):
       Token RegexMatch (GroupMatch (match:_)):
       _) -> case Text.toLower match of
          "k"      -> double $ v * 1e3
          "千" -> double $ v * 1e3
          "万" -> double $ v * 1e4
          "m"      -> double $ v * 1e6
          "g"      -> double $ v * 1e9
          _ -> Nothing
      _ -> Nothing
  }

ruleInteger7 :: Rule
ruleInteger7 = Rule
  { name = "integer (200..900)"
  , pattern =
    [ numberBetween 2 10
    , regex "百"
    ]
  , prod = \tokens -> case tokens of
      (Token Numeral (NumeralData {TNumeral.value = v}):_) -> double $ v * 100
      _ -> Nothing
  }

ruleInteger14 :: Rule
ruleInteger14 = Rule
  { name = "integer (10000..19999)"
  , pattern =
    [ regex "万"
    , numberBetween 1 10000
    ]
  , prod = \tokens -> case tokens of
      (_:Token Numeral (NumeralData {TNumeral.value = v}):_) ->
        double $ v + 10000
      _ -> Nothing
  }

ruleInteger8 :: Rule
ruleInteger8 = Rule
  { name = "integer 201..999"
  , pattern =
    [ oneOf [300, 600, 500, 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
  }

ruleInteger16 :: Rule
ruleInteger16 = Rule
  { name = "integer 20001..99999"
  , pattern =
    [ oneOf [20000, 40000, 80000, 60000, 30000, 70000, 90000, 50000]
    , numberBetween 1 10000
    ]
  , 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 (1000)"
  , pattern =
    [ regex "千"
    ]
  , prod = \_ -> integer 1000
  }

integerMap :: HashMap Text Integer
integerMap = HashMap.fromList
  [ ("零", 0)
  , ("ゼロ", 0)
  , ("一", 1)
  , ("二", 2)
  , ("三", 3)
  , ("四", 4)
  , ("五", 5)
  , ("六", 6)
  , ("七", 7)
  , ("八", 8)
  , ("九", 9)
  , ("十", 10)
  ]

ruleInteger :: Rule
ruleInteger = Rule
  { name = "integer (0..10)"
  , pattern =
    [ regex "(ゼロ|零|一|二|三|四|五|六|七|八|九|十)"
    ]
  , prod = \tokens -> case tokens of
      (Token RegexMatch (GroupMatch (match:_)):_) ->
        HashMap.lookup (Text.toLower match) integerMap >>= integer
      _ -> Nothing
  }

ruleInteger4 :: Rule
ruleInteger4 = Rule
  { name = "integer 21..99"
  , pattern =
    [ oneOf [70, 20, 60, 50, 40, 90, 30, 80]
    , numberBetween 1 10
    ]
  , prod = \tokens -> case tokens of
      (Token Numeral (NumeralData {TNumeral.value = v1}):
       Token Numeral (NumeralData {TNumeral.value = v2}):
       _) -> double $ v1 + v2
      _ -> Nothing
  }

ruleInteger2 :: Rule
ruleInteger2 = Rule
  { name = "integer (11..19)"
  , pattern =
    [ regex "十"
    , numberBetween 1 10
    ]
  , prod = \tokens -> case tokens of
      (_:Token Numeral (NumeralData {TNumeral.value = v}):_) -> double $ v + 10
      _ -> Nothing
  }

ruleInteger11 :: Rule
ruleInteger11 = Rule
  { name = "integer (2000..9000)"
  , pattern =
    [ numberBetween 2 10
    , regex "千"
    ]
  , prod = \tokens -> case tokens of
      (Token Numeral (NumeralData {TNumeral.value = v}):_) -> double $ v * 1000
      _ -> Nothing
  }

ruleIntegerWithThousandsSeparator :: Rule
ruleIntegerWithThousandsSeparator = Rule
  { name = "integer with thousands separator ,"
  , pattern =
    [ regex "(\\d{1,3}(,\\d\\d\\d){1,5})"
    ]
  , prod = \tokens -> case tokens of
      (Token RegexMatch (GroupMatch (match:_)):_) ->
        parseDouble (Text.replace (Text.singleton ',') Text.empty match) >>= double
      _ -> Nothing
  }

rules :: [Rule]
rules =
  [ ruleDecimalNumeral
  , ruleDecimalWithThousandsSeparator
  , ruleInteger
  , ruleInteger10
  , ruleInteger11
  , ruleInteger12
  , ruleInteger13
  , ruleInteger14
  , ruleInteger15
  , ruleInteger16
  , ruleInteger2
  , ruleInteger3
  , ruleInteger4
  , ruleInteger5
  , ruleInteger6
  , ruleInteger7
  , ruleInteger8
  , ruleInteger9
  , ruleIntegerNumeric
  , ruleIntegerWithThousandsSeparator
  , ruleNumeral
  , ruleNumeralsPrefixWithNegativeOrMinus
  , ruleNumeralsSuffixesKMG
  ]