# frozen_string_literal: true

module Primer
  # Use `Button` for actions (e.g. in forms). Use links for destinations, or moving from one page to another.
  class ButtonComponent < Primer::Component
    status :deprecated

    DEFAULT_SCHEME = :default
    LINK_SCHEME = :link
    SCHEME_MAPPINGS = {
      DEFAULT_SCHEME => "",
      :primary => "btn-primary",
      :danger => "btn-danger",
      :outline => "btn-outline",
      :invisible => "btn-invisible",
      LINK_SCHEME => "btn-link"
    }.freeze
    SCHEME_OPTIONS = SCHEME_MAPPINGS.keys

    DEFAULT_SIZE = :medium
    SIZE_MAPPINGS = {
      :small => "btn-sm",
      DEFAULT_SIZE => ""
    }.freeze
    SIZE_OPTIONS = SIZE_MAPPINGS.keys

    # Leading visuals appear to the left of the button text.
    #
    # Use:
    #
    # - `leading_visual_icon` for a <%= link_to_component(Primer::Beta::Octicon) %>.
    #
    # @param system_arguments [Hash] Same arguments as <%= link_to_component(Primer::Beta::Octicon) %>.
    renders_one :leading_visual, types: {
      icon: lambda { |**system_arguments|
        system_arguments[:mr] = 2

        Primer::Beta::Octicon.new(**system_arguments)
      }
    }
    alias icon with_leading_visual_icon # remove alias when all buttons are migrated to new slot names

    # Trailing visuals appear to the right of the button text.
    #
    # Use:
    #
    # - `trailing_visual_counter` for a <%= link_to_component(Primer::Beta::Counter) %>.
    #
    # @param system_arguments [Hash] Same arguments as <%= link_to_component(Primer::Beta::Counter) %>.
    renders_one :trailing_visual, types: {
      counter: lambda { |**system_arguments|
        system_arguments[:ml] = 2

        Primer::Beta::Counter.new(**system_arguments)
      }
    }
    alias counter with_trailing_visual_counter # remove alias when all buttons are migrated to new slot names

    # `Tooltip` that appears on mouse hover or keyboard focus over the button. Use tooltips sparingly and as a last resort.
    # **Important:** This tooltip defaults to `type: :description`. In a few scenarios, `type: :label` may be more appropriate.
    # Consult the <%= link_to_component(Primer::Alpha::Tooltip) %> documentation for more information.
    #
    # @param type [Symbol] (:description) <%= one_of(Primer::Alpha::Tooltip::TYPE_OPTIONS) %>
    # @param system_arguments [Hash] Same arguments as <%= link_to_component(Primer::Alpha::Tooltip) %>.
    renders_one :tooltip, lambda { |**system_arguments|
      raise ArgumentError, "Buttons with a tooltip must have a unique `id` set on the `Button`." if @id.blank? && !Rails.env.production?

      system_arguments[:for_id] = @id
      system_arguments[:type] ||= :description

      Primer::Alpha::Tooltip.new(**system_arguments)
    }

    # @param scheme [Symbol] <%= one_of(Primer::ButtonComponent::SCHEME_OPTIONS) %>
    # @param variant [Symbol] DEPRECATED. <%= one_of(Primer::ButtonComponent::SIZE_OPTIONS) %>
    # @param size [Symbol] <%= one_of(Primer::ButtonComponent::SIZE_OPTIONS) %>
    # @param tag [Symbol] (Primer::Beta::BaseButton::DEFAULT_TAG) <%= one_of(Primer::Beta::BaseButton::TAG_OPTIONS) %>
    # @param type [Symbol] (Primer::Beta::BaseButton::DEFAULT_TYPE) <%= one_of(Primer::Beta::BaseButton::TYPE_OPTIONS) %>
    # @param group_item [Boolean] Whether button is part of a ButtonGroup.
    # @param block [Boolean] Whether button is full-width with `display: block`.
    # @param dropdown [Boolean] Whether or not to render a dropdown caret.
    # @param system_arguments [Hash] <%= link_to_system_arguments_docs %>
    def initialize(
      scheme: DEFAULT_SCHEME,
      variant: nil,
      size: DEFAULT_SIZE,
      group_item: false,
      block: false,
      dropdown: false,
      **system_arguments
    )
      @scheme = scheme
      @dropdown = dropdown

      @system_arguments = system_arguments

      @id = @system_arguments[:id]

      @system_arguments[:classes] = class_names(
        system_arguments[:classes],
        SCHEME_MAPPINGS[fetch_or_fallback(SCHEME_OPTIONS, scheme, DEFAULT_SCHEME)],
        SIZE_MAPPINGS[fetch_or_fallback(SIZE_OPTIONS, variant || size, DEFAULT_SIZE)],
        "btn" => !link?,
        "btn-block" => block,
        "BtnGroup-item" => group_item
      )
    end

    private

    def link?
      @scheme == LINK_SCHEME
    end

    def trimmed_content
      return if content.blank?

      trimmed_content = content.strip

      return trimmed_content unless content.html_safe?

      # strip unsets `html_safe`, so we have to set it back again to guarantee that HTML blocks won't break
      trimmed_content.html_safe # rubocop:disable Rails/OutputSafety
    end
  end
end