class CrazyMoney

# File lib/crazy_money.rb, line 18
def initialize(amount)
  @amount = BigDecimal.new(amount.to_s)
end

# File lib/crazy_money.rb, line 14
def self.zero
  new 0
end

# File lib/crazy_money.rb, line 87
def *(other); self.class.new(@amount * BigDecimal.new(other.to_s)); end

# File lib/crazy_money.rb, line 81
def +(other); self.class.new(@amount + BigDecimal.new(other.to_s)); end

# File lib/crazy_money.rb, line 83
def -(other); self.class.new(@amount - BigDecimal.new(other.to_s)); end

# File lib/crazy_money.rb, line 85
def /(other); self.class.new(@amount / BigDecimal.new(other.to_s)); end

# File lib/crazy_money.rb, line 53
def <=>(other)
  @amount <=> BigDecimal.new(other.to_s)
end

# File lib/crazy_money.rb, line 48
def ==(other)
  @amount == BigDecimal.new(other.to_s)
end

# File lib/crazy_money.rb, line 77
def cents(ratio = 100)
  @amount * BigDecimal.new(ratio.to_s)
end

# File lib/crazy_money.rb, line 44
def inspect
  "#<CrazyMoney amount=#{self}>"
end

# File lib/crazy_money.rb, line 61
def negative?
  @amount < 0
end

# File lib/crazy_money.rb, line 69
def opposite
  self.class.new(self * -1)
end

# File lib/crazy_money.rb, line 57
def positive?
  @amount > 0
end

# File lib/crazy_money.rb, line 73
def round(*args)
  self.class.new(@amount.round(*args))
end

# File lib/crazy_money.rb, line 30
def to_i
  @amount.to_i
end

# File lib/crazy_money.rb, line 34
def to_k
  if @amount.abs < 1E3
    amount, suffix = @amount, ""
  else
    amount, suffix = (@amount / 1E3), "k"
  end

  "#{amount.round.to_i}#{suffix}".freeze
end

# File lib/crazy_money.rb, line 22
def to_s(decimal_places: 2)
  if current_currency = Configuration.current_currency
    decimal_places = currency(current_currency).decimal_places
  end

  sprintf("%.#{decimal_places}f", @amount)
end

# File lib/crazy_money.rb, line 90
def with_currency(iso_code)
  currency = currency(iso_code) || raise(ArgumentError, "Unknown currency: #{iso_code.inspect}")

  left, right = to_s(decimal_places: currency.decimal_places).split(".")
  decimal_mark = right.nil? ? "" : currency.decimal_mark
  sign = left.slice!("-")

  left = left.reverse.scan(/.{1,3}/).map(&:reverse).reverse # split every 3 digits right-to-left
         .join(thousands_separator)

  formatted = [sign, left, decimal_mark, right].join

  if currency.symbol_first
    [currency.prefered_symbol, formatted]
  else
    [formatted, " ", currency.prefered_symbol]
  end.join
end

# File lib/crazy_money.rb, line 65
def zero?
  @amount.zero?
end

# File lib/crazy_money.rb, line 118
def currency(iso_code)
  ::CurrencyData.find(iso_code)
end

# File lib/crazy_money.rb, line 111
def thousands_separator
  default = " ".freeze
  I18n.t("number.currency.format.thousands_separator", default: default)
rescue I18n::InvalidLocale
  default
end