class RequestForCommentsController < ApplicationController
  include SubmissionScoring
  before_action :set_request_for_comment, only: [:show, :edit, :update, :destroy, :mark_as_solved, :set_thank_you_note]

  skip_after_action :verify_authorized

  def authorize!
    authorize(@request_for_comments || @request_for_comment)
  end
  private :authorize!

  # GET /request_for_comments
  # GET /request_for_comments.json
  def index
    @search = RequestForComment
                  .last_per_user(2)
                  .joins('join "submissions" s on s.id = request_for_comments.submission_id
                          left outer join "files" f on f.context_id = s.id
                          left outer join "comments" on comments.file_id = f.id')
                  .group('request_for_comments.id, request_for_comments.user_id, request_for_comments.exercise_id,
                          request_for_comments.file_id, request_for_comments.question, request_for_comments.created_at,
                          request_for_comments.updated_at, request_for_comments.user_type, request_for_comments.solved,
                          request_for_comments.full_score_reached, request_for_comments.submission_id, request_for_comments.row_number') # ugly, but rails wants it this way
                  .select('request_for_comments.*, max(comments.updated_at) as last_comment')
                  .search(params[:q])
    @request_for_comments = @search.result.order('created_at DESC').paginate(page: params[:page], total_entries: @search.result.length)
    authorize!
  end

  def get_my_comment_requests
    @search = RequestForComment
                  .where(user_id: current_user.id)
                  .joins('join "submissions" s on s.id = request_for_comments.submission_id
                          left outer join "files" f on f.context_id = s.id
                          left outer join "comments" on comments.file_id = f.id')
                  .group('request_for_comments.id')
                  .select('request_for_comments.*, max(comments.updated_at) as last_comment')
                  .search(params[:q])
    @request_for_comments = @search.result.order('created_at DESC').paginate(page: params[:page])
    render 'index'
  end

  def get_rfcs_with_my_comments
    @search = RequestForComment
                  .joins(:comments) # we don't need to outer join here, because we know the user has commented on these
                  .where(comments: {user_id: current_user.id})
                  .joins('join "submissions" s on s.id = request_for_comments.submission_id
                          left outer join "files" f on f.context_id = s.id
                          left outer join "comments" as c on c.file_id = f.id')
                  .group('request_for_comments.id')
                  .select('request_for_comments.*, max(c.updated_at) as last_comment')
                  .search(params[:q])
    @request_for_comments = @search.result.order('last_comment DESC').paginate(page: params[:page])
    render 'index'
  end

  def mark_as_solved
    authorize!
    @request_for_comment.solved = true
    respond_to do |format|
      if @request_for_comment.save
        format.json { render :show, status: :ok, location: @request_for_comment }
      else
        format.json { render json: @request_for_comment.errors, status: :unprocessable_entity }
      end
    end
  end

  def set_thank_you_note
    authorize!
    @request_for_comment.thank_you_note = params[:note]

    commenters = @request_for_comment.commenters
    commenters.each {|commenter| UserMailer.send_thank_you_note(@request_for_comment, commenter).deliver_now}

    respond_to do |format|
      if @request_for_comment.save
        format.json { render :show, status: :ok, location: @request_for_comment }
      else
        format.json { render json: @request_for_comment.errors, status: :unprocessable_entity }
      end
    end
  end

  def submit

  end

  # GET /request_for_comments/1
  # GET /request_for_comments/1.json
  def show
    authorize!
  end

  # GET /request_for_comments/new
  def new
    @request_for_comment = RequestForComment.new
    authorize!
  end

  # GET /request_for_comments/1/edit
  def edit
  end

  # POST /request_for_comments
  # POST /request_for_comments.json
  def create
    @request_for_comment = RequestForComment.new(request_for_comment_params)
    respond_to do |format|
      if @request_for_comment.save
        # create thread here and execute tests. A run is triggered from the frontend and does not need to be handled here.
        Thread.new do
          score_submission(@request_for_comment.submission)
        end
        format.json { render :show, status: :created, location: @request_for_comment }
      else
        format.html { render :new }
        format.json { render json: @request_for_comment.errors, status: :unprocessable_entity }
      end
    end
    authorize!
  end

  def create_comment_exercise
    old = UserExerciseFeedback.find_by(exercise_id: params[:exercise_id], user_id: current_user.id, user_type: current_user.class.name)
    if old
      old.delete
    end
    uef = UserExerciseFeedback.new(comment_params)

    if uef.save
      render(json: {success: "true"})
    else
      render(json: {success: "false"})
    end
  end

  # DELETE /request_for_comments/1
  # DELETE /request_for_comments/1.json
  def destroy
    @request_for_comment.destroy
    respond_to do |format|
      format.html { redirect_to request_for_comments_url, notice: 'Request for comment was successfully destroyed.' }
      format.json { head :no_content }
    end
    authorize!
  end

  def comment_params
    params.permit(:exercise_id, :feedback_text).merge(user_id: current_user.id, user_type: current_user.class.name)
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_request_for_comment
      @request_for_comment = RequestForComment.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def request_for_comment_params
      # we are using the current_user.id here, since internal users are not able to create comments. The external_user.id is a primary key and does not require the consumer_id to be unique.
      params.require(:request_for_comment).permit(:exercise_id, :file_id, :question, :requested_at, :solved, :submission_id).merge(user_id: current_user.id, user_type: current_user.class.name)
    end

end