require 'action_view'
require 'active_support/core_ext'

module TrixEditorHelper
  mattr_accessor(:id, instance_accessor: false)
  class_variable_set('@@id', 0)

  def trix_editor_tag(name, value = nil, options = {})
    options.symbolize_keys!

    attributes = { class: "formatted_content #{options[:class]}".squish }

    attributes[:autofocus] = true if options[:autofocus]
    attributes[:placeholder] = options[:placeholder] if options[:placeholder]
    attributes[:spellcheck] = options[:spellcheck] if options[:spellcheck]
    attributes[:input] = options[:input] || "trix_input_#{TrixEditorHelper.id += 1}"
    attributes[:toolbar] = options[:toolbar] if options[:toolbar]

    editor_tag = content_tag('trix-editor', '', attributes)
    input_tag = hidden_field_tag(name, value, id: attributes[:input])

    editor_tag + input_tag
  end
end

module ActionView
  module Helpers
    include TrixEditorHelper

    module Tags
      class TrixEditor < Base
        include TrixEditorHelper
        delegate :dom_id, to: :'@template_object'

        def render
          options = @options.stringify_keys
          add_default_name_and_id(options)
          options['input'] ||= dom_id(object, [options['id'], :trix_input].compact.join('_'))
          trix_editor_tag(options.delete('name'), value_before_type_cast(object), options)
        end
      end
    end

    module FormHelper
      def trix_editor(object_name, method, options = {})
        Tags::TrixEditor.new(object_name, method, self, options).render
      end
    end

    class FormBuilder
      def trix_editor(method, options = {})
        @template.trix_editor(@object_name, method, objectify_options(options))
      end
    end
  end
end