# frozen_string_literal: true

module ActiveObject
  module Numeric
    MILLI ||= 0.001
    CENTI ||= MILLI * 10.0
    DECI ||= CENTI * 10.0
    DECA ||= 10.0
    HECTO ||= DECA * 10.0
    KILO ||= HECTO * 10.0
    KILOBYTE ||= 1024.0
    MEGABYTE ||= KILOBYTE * 1024.0
    GIGABYTE ||= MEGABYTE * 1024.0
    TERABYTE ||= GIGABYTE * 1024.0
    PETABYTE ||= TERABYTE * 1024.0
    EXABYTE ||= PETABYTE * 1024.0
    FEET ||= 12.0
    YARD ||= FEET * 3.0
    MILE ||= YARD * 1760.0
    NAUTICAL_MILE ||= MILE * 1.15078
    METRIC_TON ||= KILO * 1000.0
    POUND ||= 16.0
    STONE ||= POUND * 14.0
    TON ||= POUND * 2000.0
    MINUTE ||= 60.0
    HOUR ||= MINUTE * 60.0
    DAY ||= HOUR * 24.0
    WEEK ||= DAY * 7.0
    YEAR ||= DAY * 365.25
    DECADE ||= YEAR * 10.0
    CENTURY ||= DECADE * 10.0
    MILLENNIUM ||= CENTURY * 10.0

    BYTE_KEYS ||= %i[
      byte bytes kilobyte kilobytes megabyte megabytes gigabyte gigabytes terabyte terabytes
      petabyte petabytes exabyte exabytes
    ].freeze
    LENGTH_KEYS ||= {
      metric: %i[
        meter meters millimeter millimeters centimeter centimeters decimeter decimeters decameter
        decameters hectometer hectometers kilometer kilometers
      ],
      imperical: %i[
        inch inches foot feet yard yards mile miles nautical_mile nautical_miles
      ]
    }.freeze
    MASS_KEYS ||= {
      metric: %i[
        gram grams milligram milligrams centigram centigrams decigram decigrams decagram decagrams
        hectogram hectograms kilogram kilograms metric_ton metric_tons
      ],
      imperical: %i[
        ounce ounces pound pounds stone stones ton tons
      ]
    }.freeze
    TEMPERATURE_KEYS ||= %i[
      celsius fahrenheit kelvin
    ].freeze
    TIME_KEYS ||= %i[
      second seconds minute minutes hour hours day days week weeks year years decade decades century
      centuries millennium millenniums
    ].freeze

    def add(num)
      self + num
    end

    def bytes_in_bytes
      self
    end

    alias_method :byte_in_bytes, :bytes_in_bytes

    def centigrams_in_grams
      self * CENTI
    end

    alias_method :centigram_in_grams, :centigrams_in_grams

    def centimeters_in_meters
      self * CENTI
    end

    alias_method :centimeter_in_meters, :centimeters_in_meters

    def centuries_in_seconds
      self * CENTURY
    end

    alias_method :century_in_seconds, :centuries_in_seconds

    # rubocop:disable Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity
    def clamp(minimum, maximum = nil)
      if maximum.nil? && minimum.is_a?(Range)
        min_min = minimum.min
        min_max = minimum.max

        return min_min if min_min > self

        min_max < self ? min_max : self
      else
        return minimum if minimum > self

        maximum < self ? maximum : self
      end
    end
    # rubocop:enable Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity

    def days_in_seconds
      self * DAY
    end

    alias_method :day_in_seconds, :days_in_seconds

    def decades_in_seconds
      self * DECADE
    end

    alias_method :decade_in_seconds, :decades_in_seconds

    def decagrams_in_grams
      self * DECA
    end

    alias_method :decagram_in_grams, :decagrams_in_grams

    def decameters_in_meters
      self * DECA
    end

    alias_method :decameter_in_meters, :decameters_in_meters

    def decigrams_in_grams
      self * DECI
    end

    alias_method :decigram_in_grams, :decigrams_in_grams

    def decimeters_in_meters
      self * DECI
    end

    alias_method :decimeter_in_meters, :decimeters_in_meters

    def decrement(amount = 1.0)
      self + amount
    end

    def degrees_to_radians
      self * ::Math::PI / 180.0
    end

    alias_method :degree_to_radians, :degrees_to_radians

    def distance(num)
      (self - num).abs
    end

    def divide(num)
      return 0 if num.zero?

      self / num
    end

    def exabytes_in_bytes
      self * EXABYTE
    end

    alias_method :exabyte_in_bytes, :exabytes_in_bytes

    def feet_in_inches
      self * FEET
    end

    alias_method :foot_in_inches, :feet_in_inches

    def fraction
      (self - truncate).abs
    end

    def fraction?
      fraction != 0.0
    end

    def gigabytes_in_bytes
      self * GIGABYTE
    end

    alias_method :gigabyte_in_bytes, :gigabytes_in_bytes

    def grams_in_grams
      self
    end

    alias_method :gram_in_grams, :grams_in_grams

    def greater_than?(num)
      num < self
    end

    def greater_than_or_equal_to?(num)
      num <= self
    end

    def hectograms_in_grams
      self * HECTO
    end

    alias_method :hectogram_in_grams, :hectograms_in_grams

    def hectometers_in_meters
      self * HECTO
    end

    alias_method :hectometer_in_meters, :hectometers_in_meters

    def hours_in_seconds
      self * HOUR
    end

    alias_method :hour_in_seconds, :hours_in_seconds

    def inches_in_inches
      self
    end

    alias_method :inch_in_inches, :inches_in_inches

    def increment(amount = 1.0)
      self + amount
    end

    def inside?(start, finish)
      (start < self) && (finish > self)
    end

    def kilobytes_in_bytes
      self * KILOBYTE
    end

    alias_method :kilobyte_in_bytes, :kilobytes_in_bytes

    def kilometers_in_meters
      self * KILO
    end

    alias_method :kilometer_in_meters, :kilometers_in_meters

    def kilograms_in_grams
      self * KILO
    end

    alias_method :kilogram_in_grams, :kilograms_in_grams

    def less_than?(num)
      num > self
    end

    def less_than_or_equal_to?(num)
      num >= self
    end

    def metric_tons_in_grams
      self * METRIC_TON
    end

    alias_method :metric_ton_in_grams, :metric_tons_in_grams

    def megabytes_in_bytes
      self * MEGABYTE
    end

    alias_method :megabyte_in_bytes, :megabytes_in_bytes

    def meters_in_meters
      self
    end

    alias_method :meter_in_meters, :meters_in_meters

    def miles_in_inches
      self * MILE
    end

    alias_method :mile_in_inches, :miles_in_inches

    def millenniums_in_seconds
      self * MILLENNIUM
    end

    alias_method :millennium_in_seconds, :millenniums_in_seconds

    def milligrams_in_grams
      self * MILLI
    end

    alias_method :milligram_in_grams, :milligrams_in_grams

    def millimeters_in_meters
      self * MILLI
    end

    alias_method :millimeter_in_meters, :millimeters_in_meters

    def minutes_in_seconds
      self * MINUTE
    end

    alias_method :minute_in_seconds, :minutes_in_seconds

    def multiply(num)
      self * num
    end

    def multiple_of?(number)
      number.zero? ? zero? : modulo(number).zero?
    end

    def nautical_miles_in_inches
      self * NAUTICAL_MILE
    end

    alias_method :nautical_mile_in_inches, :nautical_miles_in_inches

    # rubocop:disable Style/NumericPredicate, Style/YodaCondition
    def negative?
      0 > self
    end
    # rubocop:enable Style/NumericPredicate, Style/YodaCondition

    def ordinal
      return 'th' if (11..13).cover?(abs % 100)

      case abs % 10
      when 1 then 'st'
      when 2 then 'nd'
      when 3 then 'rd'
      else 'th'
      end
    end

    def ordinalize
      "#{self}#{ordinal}"
    end

    def ounces_in_ounces
      self
    end

    alias_method :ounce_in_ounces, :ounces_in_ounces

    def outside?(start, finish)
      (start > self) || (finish < self)
    end

    def pad(options = {})
      pad_number = options[:pad_number] || 0
      precision = options[:precision] || 3

      to_s.rjust(precision, pad_number.to_s)
    end

    # rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/LineLength, Metrics/MethodLength, Metrics/PerceivedComplexity
    def pad_precision(options = {})
      pad_number = options[:pad_number] || 0
      precision = options[:precision] || 2
      separator = options[:separator] || '.'
      string = to_s

      string << separator unless string.include?(separator)
      ljust_count = string.split(separator).first.length
      ljust_count += (string.count(separator) + precision) if precision.positive?

      if ljust_count >= string.length
        string.ljust(ljust_count, pad_number.to_s)
      else
        string[0..(ljust_count - 1)]
      end
    end
    # rubocop:enable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/LineLength, Metrics/MethodLength, Metrics/PerceivedComplexity

    def percentage_of(number)
      return 0 if zero? || number.zero?

      (to_f / number.to_f) * 100.0
    end

    def petabytes_in_bytes
      self * PETABYTE
    end

    alias_method :petabyte_in_bytes, :petabytes_in_bytes

    # rubocop:disable Style/NumericPredicate, Style/YodaCondition
    def positive?
      0 < self
    end
    # rubocop:enable Style/NumericPredicate, Style/YodaCondition

    def pounds_in_ounces
      self * POUND
    end

    alias_method :pound_in_ounces, :pounds_in_ounces

    def power(num)
      self**num
    end

    def root(num)
      self**(1.0 / num)
    end

    def seconds_in_seconds
      self
    end

    alias_method :second_in_seconds, :seconds_in_seconds

    def stones_in_ounces
      self * STONE
    end

    alias_method :stone_in_ounces, :stones_in_ounces

    def subtract(num)
      self - num
    end

    def terabytes_in_bytes
      self * TERABYTE
    end

    alias_method :terabyte_in_bytes, :terabytes_in_bytes

    def to_byte(from, to)
      assert_inclusion_of_valid_keys!(BYTE_KEYS, from, to)

      to_f * 1.send("#{from}_in_bytes").to_f / 1.send("#{to}_in_bytes").to_f
    end

    def to_currency(options = {})
      unit = options[:unit] || '$'

      "#{unit}#{pad_precision(options.only(:precision))}"
    end

    # rubocop:disable Metrics/AbcSize, Metrics/MethodLength
    def to_length(from, to)
      assert_inclusion_of_valid_keys!(LENGTH_KEYS.values.flatten, from, to)

      metric_keys = LENGTH_KEYS.fetch(:metric)
      return self if from == to

      metrics_included_from = metric_keys.include?(from)

      case to
      when :meter, :meters, :millimeter, :millimeters, :centimeter, :centimeters, :decimeter,
           :decimeters, :decameter, :decameters, :hectometer, :hectometers, :kilometer, :kilometers
        if metrics_included_from
          to_f * 1.send("#{from}_in_meters").to_f / 1.send("#{to}_in_meters").to_f
        else
          to_f * ((1.send("#{from}_in_inches").to_f * 0.0254) / 1.send("#{to}_in_meters").to_f)
        end
      when :inch, :inches, :foot, :feet, :yard, :yards, :mile, :miles, :nautical_mile,
           :nautical_miles
        if metrics_included_from
          to_f * ((1.send("#{from}_in_meters").to_f * 39.3701) / 1.send("#{to}_in_inches").to_f)
        else
          to_f * 1.send("#{from}_in_inches").to_f / 1.send("#{to}_in_inches").to_f
        end
      end
    end

    def to_mass(from, to)
      assert_inclusion_of_valid_keys!(MASS_KEYS.values.flatten, from, to)

      metric_keys = MASS_KEYS.fetch(:metric)
      return self if from == to

      metrics_included_from = metric_keys.include?(from)

      case to
      when :gram, :grams, :milligram, :milligrams, :centigram, :centigrams, :decigram, :decigrams,
           :decagram, :decagrams, :hectogram, :hectograms, :kilogram, :kilograms, :metric_ton,
           :metric_tons
        if metrics_included_from
          to_f * 1.send("#{from}_in_grams").to_f / 1.send("#{to}_in_grams").to_f
        else
          to_f * ((1.send("#{from}_in_ounces") * 28.3495).to_f / 1.send("#{to}_in_grams").to_f)
        end
      when :ounce, :ounces, :pound, :pounds, :stone, :stones, :ton, :tons
        if metrics_included_from
          to_f * ((1.send("#{from}_in_grams") * 0.035274).to_f / 1.send("#{to}_in_ounces").to_f)
        else
          to_f * 1.send("#{from}_in_ounces").to_f / 1.send("#{to}_in_ounces").to_f
        end
      end
    end
    # rubocop:enable Metrics/AbcSize, Metrics/MethodLength

    def to_nearest_value(values = [])
      return self if values.length.zero?

      value = values.first
      difference = (self - value).abs

      values.each do |val|
        next unless (self - val).abs < difference

        difference = (self - val).abs
        value = val
      end

      value
    end

    def to_percentage(options = {})
      unit = options[:unit] || '%'

      "#{pad_precision(options.only(:precision))}#{unit}"
    end

    # rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/MethodLength
    def to_temperature(from, to)
      assert_inclusion_of_valid_keys!(TEMPERATURE_KEYS, from, to)

      case to
      when from
        self
      when :celsius
        from == :kelvin ? (self - 273.15) : ((self - 32.0) * 5.0 / 9.0)
      when :fahrenheit
        from == :kelvin ? (1.8 * (self - 273.15) + 32.0) : ((self * 9.0 / 5.0) + 32.0)
      when :kelvin
        from == :celsius ? (self + 273.15) : (((self - 32.0) * 5.0 / 9.0) + 273.15)
      end
    end
    # rubocop:enable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/MethodLength

    def to_time(from, to)
      assert_inclusion_of_valid_keys!(TIME_KEYS, from, to)

      (to_f * 1.send("#{from}_in_seconds").to_f) / 1.send("#{to}_in_seconds").to_f
    end

    def tons_in_ounces
      self * TON
    end

    alias_method :ton_in_ounces, :tons_in_ounces

    def weeks_in_seconds
      self * WEEK
    end

    alias_method :week_in_seconds, :weeks_in_seconds

    def within?(number, epsilon = 0.01)
      return number == self if epsilon.zero?

      alpha = to_f
      beta = number.to_f

      alpha.zero? || beta.zero? ? (alpha - beta).abs < epsilon : (alpha / beta - 1).abs < epsilon
    end

    def yards_in_inches
      self * YARD
    end

    alias_method :yard_in_inches, :yards_in_inches

    def years_in_seconds
      self * YEAR
    end

    alias_method :year_in_seconds, :years_in_seconds

    private

    def assert_inclusion_of_valid_keys!(cns, from, to)
      return if cns.include?(from) && cns.include?(to)

      raise ArgumentError,
            [
              "Unknown key(s): from: #{from.inspect} and to: #{to.inspect}.",
              "Valid keys are: #{cns.map(&:inspect).join(', ')}"
            ].join(' ')
    end

  end
end

Numeric.include(ActiveObject::Numeric) if ActiveObject.configuration.autoload_numeric