class Projects::NotesController < Projects::ApplicationController
  include NotesActions
  include ToggleAwardEmoji

  before_action :authorize_read_note!
  before_action :authorize_create_note!, only: [:create]
  before_action :authorize_resolve_note!, only: [:resolve, :unresolve]

  #
  # This is a fix to make spinach feature tests passing:
  # Controller actions are returned from AbstractController::Base and methods of parent classes are
  #   excluded in order to return only specific controller related methods.
  # That is ok for the app (no :create method in ancestors)
  #   but fails for tests because there is a :create method on FactoryGirl (one of the ancestors)
  #
  # see https://github.com/rails/rails/blob/v4.2.7/actionpack/lib/abstract_controller/base.rb#L78
  #
  def create
    super
  end

  def delete_attachment
    note.remove_attachment!
    note.update_attribute(:attachment, nil)

    respond_to do |format|
      format.js { head :ok }
    end
  end

  def resolve
    return render_404 unless note.resolvable?

    note.resolve!(current_user)

    MergeRequests::ResolvedDiscussionNotificationService.new(project, current_user).execute(note.noteable)

    discussion = note.discussion

    render json: {
      resolved_by: note.resolved_by.try(:name),
      discussion_headline_html: (view_to_html_string('discussions/_headline', discussion: discussion) if discussion)
    }
  end

  def unresolve
    return render_404 unless note.resolvable?

    note.unresolve!

    discussion = note.discussion

    render json: {
      discussion_headline_html: (view_to_html_string('discussions/_headline', discussion: discussion) if discussion)
    }
  end

  private

  def note
    @note ||= @project.notes.find(params[:id])
  end
  alias_method :awardable, :note

  def note_html(note)
    render_to_string(
      "shared/notes/_note",
      layout: false,
      formats: [:html],
      locals: { note: note }
    )
  end

  def discussion_html(discussion)
    return if discussion.individual_note?

    render_to_string(
      "discussions/_discussion",
      layout: false,
      formats: [:html],
      locals: { discussion: discussion }
    )
  end

  def diff_discussion_html(discussion)
    return unless discussion.diff_discussion?

    if params[:view] == 'parallel'
      template = "discussions/_parallel_diff_discussion"
      locals =
        if params[:line_type] == 'old'
          { discussions_left: [discussion], discussions_right: nil }
        else
          { discussions_left: nil, discussions_right: [discussion] }
        end
    else
      template = "discussions/_diff_discussion"
      locals = { discussions: [discussion] }
    end

    render_to_string(
      template,
      layout: false,
      formats: [:html],
      locals: locals
    )
  end

  def finder_params
    params.merge(last_fetched_at: last_fetched_at)
  end

  def authorize_resolve_note!
    return access_denied! unless can?(current_user, :resolve_note, note)
  end
end
