# frozen_string_literal: true

require 'bigdecimal'
require 'bigdecimal/util'
require 'pathname'
require 'nkf'

module FeCoreExt::CoreExt
end

module FeCoreExt::CoreExt::String
  def to_integer
    return unless valid_number?
    delete(',').to_i
  end

  def integer?
    self.to_integer.to_s == self.delete(',')
  end

  def to_decimal
    return unless valid_number?
    delete(',').to_d
  end

  def to_decimal_new
    return unless valid_number?
    delete(',').to_d
  end

  def to_float
    return unless valid_number?
    delete(',').to_f
  end

  def to_pathname
    Pathname(self)
  end

  def not_number?
    to_i == 0 && match('0').nil?
  end

  def valid_number?
    match?(/^-?([0-9][\d,.]*)$/)
  end

  ## deprecated
  def zen_to_han
    tr('０-９Ａ-Ｚａ-ｚ　＆・－（）', '0-9A-Za-z &･\-()')
  end

  def alphanumeric_zen_to_han
    tr('０-９Ａ-Ｚａ-ｚ　＆・．－（）', '0-9A-Za-z &･.\-()')
  end

  def to_katakana
    tr('ぁ-ん', 'ァ-ン')
  end

  def match?(str)
    /#{str}/ === self
  end

  def kana_upcase
    tr('ァィゥェォヵヶッャュョヮ', 'アイウエオカケツヤユヨワ')
  end

  def to_han_kana
    return if self.nil?
    NKF.nkf('-wxZ4', self)
  end

  def to_zen_kana
    return if self.nil?
    NKF.nkf('-wX', self)
  end

  def to_date_in_ja
    to_date_in_ja_seireki || to_date_in_ja_heisei
  end

  def to_date_in_ja_seireki
    match(/(\d{4})年(\d{1,2})月(\d{1,2})日/) {Date.new($1.to_i, $2.to_i, $3.to_i)}
  end

  def to_date_in_ja_heisei
    match(/平成(\d{2})年(\d{1,2})月(\d{1,2})日/) {Date.new($1.to_i + 1988, $2.to_i, $3.to_i)}
  end

  # remove also no break space and other space like characters.
  def strong_strip
    reverse.gsub(/^\p{Zs}+|^\p{Cf}+/, '').reverse.gsub(/^\p{Zs}+|^\p{Cf}+/, '')
  end

  def sjis_encodable
    tr("\u301C\u2212\u00A2\u00A3\u00AC\u2014\u2016",
       "\uFF5E\uFF0D\uFFE0\uFFE1\uFFE2\u2015\u2225")
  end

  def eucjp_encodable
    tr("\uFF5E\uFF0D\uFFE0\uFFE1\uFFE2\u2015\u2225",
       "\u301C\u2212\u00A2\u00A3\u00AC\u2014\u2016")
  end
end

class String
  include FeCoreExt::CoreExt::String
end