module MessageTrain
  # Unsubscribes controller
  class UnsubscribesController < MessageTrain::ApplicationController
    # GET /unsubscribes
    def index
      @subscriptions = @box_user.subscriptions
    end

    # POST /unsubscribes
    def create
      if params[:all]
        @from = nil
        @unsubscribe = @box_user.unsubscribe_from(@from)
        if @unsubscribe.errors.empty?
          flash[:notice] = :unsubscribe_from_all_message.l
        else
          flash[:error] = @unsubscribe.errors.full_messages.to_sentence
        end
        redirect_to message_train.unsubscribes_url
        return
      end
      unsub = unsubscribe_params
      model = unsub[:from_type].constantize
      @from = model.find(unsub[:from_id])
      if @from == @box_user || @from.allows_receiving_by?(@box_user)
        @unsubscribe = @box_user.unsubscribe_from(@from)
        if @unsubscribe.errors.empty?
          if @from == @box_user
            flash[:notice] = :unsubscribe_message.l
          else
            name_column = MessageTrain.configuration.name_columns[
              @from.class.table_name.to_sym
            ]
            collective_name = @from.send(name_column)
            collective_type = @from.class.name
            flash[:notice] = :collective_unsubscribe_message.l(
              collective_name: collective_name,
              collective_type: collective_type
            )
          end
        else
          flash[:error] = @unsubscribe.errors.full_messages.to_sentence
        end
      else
        flash[:error] = :you_are_not_in_that_collective_type.l(
          collective_type: model.name
        )
        raise ActiveRecord::RecordNotFound
      end
      redirect_to message_train.unsubscribes_url
    end

    # DELETE /unsubscribes/:id
    def destroy
      if params[:all]
        @unsubscribe = @box_user.unsubscribes.where(from: nil).destroy_all
        flash[:notice] = :unsubscribe_all_removed_message.l
      else
        @unsubscribe = @box_user.unsubscribes.find(params[:id])
        @from = @unsubscribe.from
        if @from == @box_user
          message = :unsubscribe_removed_message.l
        else
          name_column = MessageTrain.configuration.name_columns[
            @unsubscribe.from.class.table_name.to_sym
          ]
          collective_name = @unsubscribe.from.send(name_column)
          collective_type = @unsubscribe.from_type
          message = :collective_unsubscribe_removed_message.l(
            collective_name: collective_name,
            collective_type: collective_type
          )
        end
        @unsubscribe.destroy
        flash[:notice] = message
      end
      redirect_to message_train.unsubscribes_url
    end

    private

    # Never trust parameters from the scary internet, only allow the white list
    # through.
    def unsubscribe_params
      params.require(:unsubscribe).permit(:from_type, :from_id)
    end
  end
end