# frozen_string_literal: true

module Ariadne
  # Use `CounterComponent` to add a count to navigational elements and buttons.
  #
  # @accessibility
  #   Always use `CounterComponent` with adjacent text that provides supplementary information regarding what the count is for. For instance, `Counter`
  #   should be accompanied with text such as `issues` or `pull requests`.
  #
  class CounterComponent < Ariadne::Component
    DEFAULT_CLASSES = "ariadne-inline-flex ariadne-items-center ariadne-p-1 ariadne-border ariadne-border-transparent ariadne-rounded-full ariadne-shadow-sm focus:ariadne-outline-none focus:ariadne-ring-2 focus:ariadne-ring-offset-2"

    # @example Default
    #   <%= render(Ariadne::CounterComponent.new(count: 25)) %>
    #
    # @example Schemes
    #   <%= render(Ariadne::CounterComponent.new(count: 25)) %>
    #   <%= render(Ariadne::CounterComponent.new(count: 25)) %>
    #
    # @param tag [Symbol, String] The rendered tag name
    # @param classes [String] <%= link_to_classes_docs %>
    # @param count [Integer, Float::INFINITY, nil] The number to be displayed (e.x. # of issues, pull requests)
    # @param limit [Integer, nil] Maximum value to display. Pass `nil` for no limit. (e.x. if `count` == 6,000 and `limit` == 5000, counter will display "5,000+")
    # @param hide_if_zero [Boolean] If true, a `hidden` attribute is added to the counter if `count` is zero.
    # @param text [String] Text to display instead of count.
    # @param round [Boolean] Whether to apply rounding logic to value.
    # @param attributes [Hash] <%= link_to_attributes_docs %>
    def initialize(
      tag: :span,
      count: 0,
      limit: 9_000,
      hide_if_zero: false,
      text: "",
      round: false,
      classes: "",
      attributes: {}
    )
      @count = count
      @limit = limit
      @hide_if_zero = hide_if_zero
      @text = text
      @round = round
      @attributes = attributes

      @has_limit = !@limit.nil?

      @tag = check_incoming_tag(:span, tag)

      @attributes[:title] = title

      @classes = class_names(
        DEFAULT_CLASSES,
        classes
      )
      @attributes[:hidden] = true if count == 0 && hide_if_zero
    end

    def call
      render(Ariadne::BaseComponent.new(tag: @tag, classes: @classes, attributes: @attributes)) { value }
    end

    private def title
      if @text.present?
        @text
      elsif @count.nil?
        "Not available"
      elsif @count == Float::INFINITY
        "Infinity"
      else
        count = @count.to_i
        str = number_with_delimiter(@has_limit ? [count, @limit].min : count)
        str += "+" if @has_limit && count > @limit
        str
      end
    end

    private def value
      if @text.present?
        @text
      elsif @count.nil?
        "" # CSS will hide it
      elsif @count == Float::INFINITY
        "∞"
      else
        if @round
          count = @has_limit ? [@count.to_i, @limit].min : @count.to_i
          precision = count.between?(100_000, 999_999) ? 0 : 1
          units = { thousand: "k", million: "m", billion: "b" }
          str = number_to_human(count, precision: precision, significant: false, units: units, format: "%n%u")
        else
          @count = @count.to_i
          str = number_with_delimiter(@has_limit ? [@count, @limit].min : @count)
        end

        str += "+" if @has_limit && @count.to_i > @limit
        str
      end
    end
  end
end