af83/chouette-core

# frozen_string_literal: true

# Manage hour, minute and optionaly day offset
#
# Examples:
#
#  = f.input as: :time_of_day
#  = f.input as: :time_of_day, use_day_offset: true
#
class TimeOfDayInput < SimpleForm::Inputs::Base
  delegate :select_hour, :select_minute, to: :template

  def input(wrapper_options = nil)
    merged_input_options = merge_wrapper_options(input_html_options, wrapper_options)

    parts = [
      select_hour(time_of_day, hour_options, merged_input_options),
      separator(':'),
      select_minute(time_of_day, minute_options, merged_input_options)
    ]

    parts += [separator, select_day_offset(merged_input_options)] if use_day_offset?

    parts.join
  end

  def select_day_offset(html_options = {})
    name = "#{object_name}[#{attribute_name_with_position(4)}]"
    SelectDayOffset.new(name, time_of_day&.day_offset || 0, html_options).select
  end

  # Create select for day offset
  class SelectDayOffset
    include ActionView::Helpers::FormOptionsHelper
    include ActionView::Helpers::FormTagHelper

    def initialize(name, value = 0, html_options = {})
      @name = name
      @value = value
      @html_options = html_options.dup
    end

    attr_reader :name, :value

    def day_offsets
      (0..5).map { |value| DayOffset.new(value) }
    end

    def options
      options_from_collection_for_select(day_offsets, 'value', 'name', value)
    end

    # By default, rails creates an id with a final _ ?!
    #
    # When name is control_list[controls_attributes][0][after(4i)] ,
    # Rails gives control_list_controls_attributes_0_after_4i_.
    #
    # This method creates a fixed id: control_list_controls_attributes_0_after_4i
    def id
      name.gsub(/[\[\]()]+/, '_').gsub(/_$/, '')
    end

    def html_options
      @html_options.tap do |options|
        options[:id] ||= id
      end
    end

    def select
      select_tag name, options, html_options
    end
  end

  def use_day_offset?
    options[:use_day_offset]
  end

  def separator(content = '')
    content_tag(:span, content, class: 'mx-3')
  end

  # DayOffset with its value and its localized name
  class DayOffset
    attr_reader :value

    def initialize(value)
      @value = value
    end

    def name
      I18n.t('day_offset.name', value: value)
    end
  end

  def base_options
    { prefix: object_name }
  end

  def attribute_name_with_position(position)
    "#{attribute_name}(#{position}i)"
  end

  def hour_options
    base_options.merge(field_name: attribute_name_with_position(1))
  end

  def minute_options
    base_options.merge(field_name: attribute_name_with_position(2), minute_step: 5)
  end

  def time_of_day
    @time_of_day ||= @builder.object.send(attribute_name)
  end
end