# 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