# frozen_string_literal: true

# Various helpers methods
module ApplicationHelper
  require 'message_format'

  ##
  # Verify if the provided attribute is in the provided attributes array, whatever it exists or not
  # @param attributes {Array|nil}
  # @param attribute {String}
  ##
  def attribute_requested?(attributes, attribute)
    attributes.try(:include?, attribute)
  end

  def bootstrap_class_for(flash_type)
    { flash: 'alert-success', alert: 'alert-danger', notice: 'alert-info' }[flash_type.to_sym] || flash_type.to_s
  end

  def flash_messages(_opts = {})
    flash.each do |msg_type, message|
      concat(content_tag(:div, message, class: "flash-message alert #{bootstrap_class_for(msg_type)} fade in") do
               concat content_tag(:button, 'x', class: 'close', data: { dismiss: 'alert' })
               concat message
             end)
    end
    nil
  end

  def print_slot(starting, ending)
    "#{starting.strftime('%H:%M')} - #{ending.strftime('%H:%M')}"
  end

  def class_exists?(class_name)
    klass = Module.const_get(class_name)
    klass.is_a?(Class)
  rescue NameError
    false
  end

  ##
  # Allow to treat a rails i18n key as a MessageFormat interpolated pattern. Used in ruby views (API/mails)
  # @param key {String} Ruby-on-Rails I18n key (from config/locales/xx.yml)
  # @param interpolations {Hash} list of variables to interpolate, following ICU MessageFormat syntax
  ##
  def _t(key, interpolations)
    message = MessageFormat.new(I18n.t(scope_key_by_partial(key)), I18n.locale.to_s)
    text = message.format(interpolations)
    if html_safe_translation_key?(key)
      text.html_safe # rubocop:disable Rails/OutputSafety
    else
      text
    end
  end

  def bool_to_sym(bool)
    bool ? :true : :false # rubocop:disable Lint/BooleanSymbol
  end

  def str_to_bool(str, default = 'true')
    str.to_s.casecmp(default).zero?
  end

  def amount_to_f(amount)
    amount / 100.00
  end

  ##
  # Apply a correction for a future DateTime due to change in Daylight Saving Time (DST) period
  # @param reference {ActiveSupport::TimeWithZone}
  # @param datetime {DateTime}
  # Inspired by https://stackoverflow.com/a/12065605
  ##
  def dst_correction(reference, datetime)
    res = datetime.in_time_zone(reference.time_zone.tzinfo.name)
    res -= 1.hour if res.dst? && !reference.dst?
    res += 1.hour if reference.dst? && !res.dst?
    res
  end

  # Return the given amount in centimes, without floating-point imprecision errors
  def to_centimes(amount)
    (BigDecimal(amount.to_s) * 100.0).to_f
  end

  # Return the given parameter as it, or as an array if it can be parsed as an array
  def may_array(param)
    return param if param.is_a?(Array)

    return param unless param&.chars&.first == '[' && param&.chars&.last == ']'

    param.gsub(/[\[\]]/i, '').split(',')
  end

  private

  ## inspired by gems/actionview-4.2.5/lib/action_view/helpers/translation_helper.rb
  # rubocop:disable Rails/HelperInstanceVariable
  def scope_key_by_partial(key)
    if key.to_s.first == '.'
      raise "Cannot use t(#{key.inspect}) shortcut because path is not available" unless @virtual_path # rubocop:disable Rails/HelperInstanceVariable

      @virtual_path.gsub(%r{/_?}, '.') + key.to_s # rubocop:disable Rails/HelperInstanceVariable
    else
      key
    end
  end
  # rubocop:enable Rails/HelperInstanceVariable

  def html_safe_translation_key?(key)
    key.to_s =~ /(\b|_|\.)html$/
  end
end