# encoding: utf-8
#
# This file is part of the lazier gem. Copyright (C) 2011 and above Shogun <shogun_panda@me.com>.
# Licensed under the MIT license, which can be found at http://www.opensource.org/licenses/mit-license.php.
#

module Lazier
  # Settings for the extensions.
  class Settings
    # Settings for numbers formatting.
    attr_reader :format_number

    # String representations of booleans.
    attr_reader :boolean_names

    # String representations of days and months.
    attr_reader :date_names

    # Custom date and time formats.
    attr_reader :date_formats

    # Returns the singleton instance of the settings.
    #
    # @return [Settings] The singleton instance of the settings.
    def self.instance
      @instance ||= self.new
    end

    # Initializes a new settings object.
    def initialize
      self.setup_format_number
      self.setup_boolean_names
      self.setup_date_formats
      self.setup_date_names
    end

    # Setups formatters for a number.
    # @see Object#format_number
    #
    # @param prec [Fixnum] The precision to show.
    # @param decimal_separator [String] The string to use as decimal separator.
    # @param add_string [String] The string to append to the number.
    # @param k_separator [String] The string to use as thousands separator.
    # @return [Hash] The new formatters.
    def setup_format_number(prec = 2, decimal_separator = ".", add_string = "", k_separator = ",")
      @format_number = {
        :prec => prec,
        :decimal_separator => decimal_separator,
        :add_string => add_string,
        :k_separator => k_separator
      }
    end

    # Setups strings representation of booleans.
    # @see Object#format_boolean
    #
    # @param true_name [String] The string representation of `true`. Defaults to `Yes`.
    # @param false_name [String] The string representation of `false`. Defaults to `No`.
    # @return [Hash] The new representations.
    def setup_boolean_names(true_name = nil, false_name = nil)
      true_name ||= "Yes"
      false_name ||= "No"
      @boolean_names = {true => true_name, false => false_name}
    end

    # Setups custom formats for dates and times.
    # @see DateTime#lstrftime
    #
    # @param formats [Hash] The format to add or replace.
    # @param replace [Boolean] If to discard current formats.
    # @return [Hash] The new formats.
    def setup_date_formats(formats = nil, replace = false)
      formats = {
          :ct_date => "%Y-%m-%d",
          :ct_time => "%H:%M:%S",
          :ct_date_time => "%F %T",
          :ct_iso_8601 => "%FT%T%z"
      } if formats.blank?

      if formats.is_a?(::Hash) then
        if !replace then
          @date_formats ||= {}
          @date_formats.merge!(formats)
        else
          @date_formats = formats
        end

        @date_formats.each_pair do |k, v| ::Time::DATE_FORMATS[k] = v end
      end

      @date_formats
    end

    # Setups strings representation of days and months.
    # @see DateTime::ClassMethods#days
    # @see DateTime::ClassMethods#months
    # @see DateTime#lstrftime
    #
    # @param long_months [Array] The string representation of months.
    # @param short_months [Array] The abbreviated string representation of months.
    # @param long_days [Array] The string representation of days.
    # @param short_days [Array] The abbreviated string representation of days.
    # @return [Hash] The new representations.
    def setup_date_names(long_months = nil, short_months = nil, long_days = nil, short_days = nil)
      long_months = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"] if long_months.blank?
      short_months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"] if short_months.blank?
      long_days = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"]  if long_days.blank?
      short_days = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"]  if short_days.blank?

      @date_names = {
        :long_months => long_months,
        :short_months => short_months,
        :long_days => long_days,
        :short_days => short_days
      }
    end
  end
end