andrewhao/bookplanner

class PlansController < ApplicationController
  before_action :set_plan, only: [:show, :edit, :update, :destroy]
  before_action :set_classroom, only: [:new, :index]

  rescue_from PlanGenerator::NoPlanFound, with: :no_plan_found

  def no_plan_found(e)
    Rails.logger.info(<<-MSG
                      #{e.message}
                      No plan found.
                      #{e.backtrace.join("\n")}
                      MSG
                     )
    redirect_to classroom_path(@classroom),
                alert: "Unable to generate a new plan for this classroom. Please try adding another bag."
  end

  # GET /plans
  # GET /plans.json
  def index
    @plans = @classroom.plans
  end

  # GET /plans/1
  # GET /plans/1.json
  def show
  end

  # GET /classrooms/:classroom_id/plans/new
  def new
    @plan = Plan.new classroom: @classroom
    pg = PlanGenerator.new(@classroom.eligible_students, @classroom.available_book_bags)
    assignments = pg.generate
    @plan.assignments += assignments
  end

  # GET /plans/1/edit
  def edit
    @classroom = @plan.classroom
    @out_on_loan_assignments = @classroom.loaned_assignments - @plan.assignments
  end

  # POST /plans
  # POST /plans.json
  def create
    @plan = Plan.new(plan_params)

    respond_to do |format|
      if @plan.save
        format.html { redirect_to classroom_url(@plan.classroom), notice: "Plan was successfully created." }
        format.json { render action: "show", status: :created, location: @plan }
      else
        format.html { render action: "new" }
        format.json { render json: @plan.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /plans/1
  # PATCH/PUT /plans/1.json
  def update
    respond_to do |format|
      if PlanUpdater.new(@plan, plan_params).update
        format.html { redirect_to @plan.classroom, notice: "Plan was successfully updated." }
        format.json { head :no_content }
      else
        format.html { render action: "edit" }
        format.json { render json: @plan.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /plans/1
  # DELETE /plans/1.json
  def destroy
    classroom = @plan.classroom
    @plan.destroy
    respond_to do |format|
      Rails.logger.info "Classroom: #{classroom.inspect}"
      format.html { redirect_to classroom_url(classroom), notice: "Plan was successfully deleted" }
      format.json { head :no_content }
    end
  end

  private

  # Use callbacks to share common setup or constraints between actions.
  def set_plan
    @plan = Plan.find(params[:id])
  end

  def set_classroom
    @classroom = Classroom.find(params[:classroom_id])
  end

  # Never trust parameters from the scary internet, only allow the white list through.
  def plan_params
    params.require(:plan).permit(
      period_attributes: [:id, :name, :classroom_id],
      assignments_attributes: [:id, :book_bag_id, :student_id]
    )
  end
end