# frozen_string_literal: true

module Discorb
  #
  # Represents a button component.
  #
  class Button < Component
    # @return [String] The label of the button.
    attr_accessor :label
    # @return [:primary, :secondary, :success, :danger, :link] The style of the button.
    attr_accessor :style
    # @return [Discorb::Emoji] The emoji of the button.
    attr_accessor :emoji
    # @return [String] The custom ID of the button.
    #   Won't be used if the style is `:link`.
    attr_accessor :custom_id
    # @return [String] The URL of the button.
    #   Only used when the style is `:link`.
    attr_accessor :url
    # @return [Boolean] Whether the button is disabled.
    attr_accessor :disabled
    alias disabled? disabled

    # @private
    # @return [{Symbol => Integer}] The mapping of button styles.
    STYLES = { primary: 1, secondary: 2, success: 3, danger: 4, link: 5 }.freeze

    #
    # Initialize a new button.
    #
    # @param [String] label The label of the button.
    # @param [:primary, :secondary, :success, :danger, :link] style The style of the button.
    # @param [Discorb::Emoji] emoji The emoji of the button.
    # @param [String] custom_id The custom ID of the button.
    # @param [String] url The URL of the button.
    # @param [Boolean] disabled Whether the button is disabled.
    #
    def initialize(
      label,
      style = :primary,
      emoji: nil,
      custom_id: nil,
      url: nil,
      disabled: false
    )
      @label = label
      @style = style
      @emoji = emoji
      @custom_id = custom_id
      @url = url
      @disabled = disabled
    end

    #
    # Converts the button to a hash.
    #
    # @see https://discord.com/developers/docs/interactions/message-components#button-object-button-structure
    #  Official Discord API docs
    # @return [Hash] A hash representation of the button.
    #
    def to_hash
      if @style == :link
        {
          type: 2,
          label: @label,
          style: STYLES[@style],
          url: @url,
          emoji: @emoji&.to_hash,
          disabled: @disabled
        }
      else
        {
          type: 2,
          label: @label,
          style: STYLES[@style],
          custom_id: @custom_id,
          emoji: @emoji&.to_hash,
          disabled: @disabled
        }
      end
    end

    def inspect
      "#<#{self.class}: #{@custom_id || @url}>"
    end

    class << self
      #
      # Creates a new button from a hash.
      #
      # @param [Hash] data The hash to create the button from.
      #
      # @return [Discorb::Button] The created button.
      #
      def from_hash(data)
        new(
          data[:label],
          data[:style],
          emoji: data[:emoji],
          custom_id: data[:custom_id],
          url: data[:url],
          disabled: data[:disabled]
        )
      end
    end
  end
end