class V1::ReviewsController < ApplicationController
  include ::DeletedObjectsController

  before_action :set_review, only: [:show, :destroy, :rate]
  before_action :authenticate_user!, only: [:create, :rate, :destroy]

  # GET /v1/collections/1/reviews
  def index
    render json: ActiveModel::ArraySerializer.new(
      reviewable.reviews,
      each_serializer: ReviewSerializer)
  end

  # GET /v1/collections/1/reviews/1
  def show
    render json: @review
  end

  # POST /v1/learning_objects/1/reviews
  # POST /v1/learning_objects/1/reviews.json
  def create
    review = reviewable.reviews.new(review_params.merge(user: current_user))
    errors = process_creation review

    # If review has any errors, status 422
    if errors.any?
      render json: errors, status: :unprocessable_entity
    else
      render json: review, status: :created
    end
  end

  def process_creation(review)
    # Store errors
    errors = []

    # If review saved, without errors ...
    if review.save
      # ... build ratings objects from parameters
      review.review_ratings.each do |r|
        r.review = review
        # ... and store if
        r.save
        errors << r.errors
      end
    else
      errors << review.errors
    end

    errors = errors.map { |e| e.messages }.inject(:merge)
  end

  # DELETE /v1/learning_objects/1/reviews/2
  # DELETE /v1/learning_objects/1/reviews/2.json
  def destroy
    authorize @review
    @review.destroy
    render nothing: true, status: :ok
  end

  # User can rate the review to approve or not
  # POST /v1/learning_objects/1/reviews/2/rate
  # POST /v1/learning_objects/1/reviews/2/rate.json
  def rate
    approves = params[:approves].to_bool
    rate = Rate.where(user: current_user, review: @review).first_or_initialize

    if rate.update(approves: approves)
      render json: rate, status: :created
    else
      render json: rate.errors, status: :unprocessable_entity
    end
  end

  private

  def deleted_resource
    Review
  end

  def reviewable
    resource, id = request.path.split('/')[2, 3]
    reviewable_model = resource.singularize.classify.constantize
    @reviewable = reviewable_model.find(id)
  end

  # Never trust parameters from the scary internet, only allow the white list through.
  def review_params
    params.require(:review).permit(:name, :description, :pros, :cons, review_ratings_attributes: [:rating_id, :value])
  end

  def set_review
    @review ||= Review.find(params[:id])
  end
end