class MyModuleCommentsController < ApplicationController
  include ActionView::Helpers::TextHelper
  include InputSanitizeHelper
  include ApplicationHelper
  include Rails.application.routes.url_helpers

  before_action :load_vars
  before_action :check_view_permissions, only: :index
  before_action :check_add_permissions, only: [:create]
  before_action :check_manage_permissions, only: %i(edit update destroy)

  def index
    @comments = @my_module.last_comments(@last_comment_id, @per_page)

    respond_to do |format|
      format.json do
        # 'index' partial includes header and form for adding new
        # messages. 'list' partial is used for showing more
        # comments.
        partial = 'index.html.erb'
        partial = 'list.html.erb' if @last_comment_id > 0
        more_url = ''
        if @comments.count > 0
          more_url = url_for(my_module_my_module_comments_url(@my_module,
                                                              format: :json,
                                                              from: @comments
                                                                    .first.id))
        end
        render json: {
          perPage: @per_page,
          resultsNumber: @comments.length,
          moreUrl: more_url,
          html: render_to_string(
            partial: partial,
            locals: {
              comments: @comments,
              more_comments_url: more_url
            }
          )
        }
      end
    end
  end

  def create
    @comment = TaskComment.new(
      message: comment_params[:message],
      user: current_user,
      my_module: @my_module
    )

    respond_to do |format|
      if @comment.save

        my_module_comment_annotation_notification
        # Generate activity
        Activity.create(
          type_of: :add_comment_to_module,
          user: current_user,
          project: @my_module.experiment.project,
          experiment: @my_module.experiment,
          my_module: @my_module,
          message: t(
            'activities.add_comment_to_module',
            user: current_user.full_name,
            module: @my_module.name
          )
        )

        format.json do
          render json: {
            html: render_to_string(
              partial: 'comment.html.erb',
              locals: {
                comment: @comment
              }
            ),
            date: @comment.created_at.strftime('%d.%m.%Y'),
            linked_id: @my_module.id, # Used for counter badge
            counter: @my_module.task_comments.count # Used for counter badge
          },
          status: :created
        end
      else
        response.status = 400
        format.json do
          render json: {
            errors: @comment.errors.to_hash(true)
          }
        end
      end
    end
  end

  def edit
    @update_url =
      my_module_my_module_comment_path(@my_module, @comment, format: :json)
    respond_to do |format|
      format.json do
        render json: {
          html: render_to_string(
            partial: '/comments/edit.html.erb'
          )
        }
      end
    end
  end

  def update
    old_text = @comment.message
    @comment.message = comment_params[:message]
    respond_to do |format|
      format.json do
        if @comment.save

          my_module_comment_annotation_notification(old_text)
          # Generate activity
          Activity.create(
            type_of: :edit_module_comment,
            user: current_user,
            project: @my_module.experiment.project,
            experiment: @my_module.experiment,
            my_module: @my_module,
            message: t(
              'activities.edit_module_comment',
              user: current_user.full_name,
              module: @my_module.name
            )
          )
          message = custom_auto_link(@comment.message)
          render json: { comment: message }, status: :ok
        else
          render json: { errors: @comment.errors.to_hash(true) },
                 status: :unprocessable_entity
        end
      end
    end
  end

  def destroy
    respond_to do |format|
      format.json do
        if @comment.destroy
          # Generate activity
          Activity.create(
            type_of: :delete_module_comment,
            user: current_user,
            project: @my_module.experiment.project,
            experiment: @my_module.experiment,
            my_module: @my_module,
            message: t(
              'activities.delete_module_comment',
              user: current_user.full_name,
              module: @my_module.name
            )
          )
          # 'counter' and 'linked_id' are used for counter badge
          render json: { linked_id: @my_module.id,
                         counter: @my_module.task_comments.count },
                 status: :ok
        else
          render json: { message: I18n.t('comments.delete_error') },
                 status: :unprocessable_entity
        end
      end
    end
  end

  private

  def load_vars
    @last_comment_id = params[:from].to_i
    @per_page = Constants::COMMENTS_SEARCH_LIMIT
    @my_module = MyModule.find_by_id(params[:my_module_id])

    unless @my_module
      render_404
    end
  end

  def check_view_permissions
    render_403 unless can_read_experiment?(@my_module.experiment)
  end

  def check_add_permissions
    render_403 unless can_create_comments_in_module?(@my_module)
  end

  def check_manage_permissions
    @comment = TaskComment.find_by_id(params[:id])
    render_403 unless @comment.present? &&
                      can_manage_comment_in_module?(@comment.becomes(Comment))
  end

  def comment_params
    params.require(:comment).permit(:message)
  end

  def my_module_comment_annotation_notification(old_text = nil)
    smart_annotation_notification(
      old_text: old_text,
      new_text: @comment.message,
      title: t('notifications.my_module_comment_annotation_title',
               my_module: @my_module.name,
               user: current_user.full_name),
      message: t('notifications.my_module_annotation_message_html',
                 project: link_to(@my_module.experiment.project.name,
                                  project_url(@my_module
                                              .experiment
                                              .project)),
                 experiment: link_to(@my_module.experiment.name,
                                     canvas_experiment_url(@my_module
                                                           .experiment)),
                 my_module: link_to(@my_module.name,
                                    protocols_my_module_url(
                                      @my_module
                                    )))
    )
  end
end