fga-gpp-mds/2017.1-Escola-X

# File name: subjects_controller.rb
# Class name: SubjectsController
# Description: Controller used to communicate with the proprietary view of subjects
class SubjectsController < ApplicationController
    include SessionsHelper

  def index
      if ( is_principal? or is_teacher? )
          @subjects = Subject.all
    else
      redirect_to "/errors/error_500"
      end
  end

    def classroom_subjects
        @classroom = Classroom.find(params[:id])
        @subjects = @classroom.subjects
    end

  def new
      if ( is_principal? )
            @classroom_grades = ClassroomGrade.all
          @subject = Subject.new
    else
      redirect_to "/errors/error_500"
      end
  end

  def edit
      if ( is_principal? )
            @classroom_grades = ClassroomGrade.all
        @subject = Subject.find(params[:id])
    else
      redirect_to "/errors/error_500"
    end
  end

  def show
      if( is_principal? )
          @subject = Subject.find(params[:id])
    else
      redirect_to "/errors/error_500"
      end
  end

  def create
      if ( is_principal? )
            @classroom_grades = ClassroomGrade.all
            @subject = Subject.new(subject_params)
            @teacher = Teacher.find_by_registry(params[:teacher_registry])
            if ( @teacher.nil? )
                @subject.save
                render 'new'
            else
                @subject.teacher_id = @teacher.id
              if ( @subject.save )
                    flash[:success] = "Matéria criada com sucesso"
                redirect_to @subject
            else
                render 'new'
            end
        end
    else
      redirect_to "/errors/error_500"
        end
  end

  def destroy
      if ( is_principal? )
          @subject = Subject.find(params[:id])
          @subject.destroy
            flash[:alert] = "Matéria excluída com sucesso"
          redirect_to subjects_path
    else
      redirect_to "/errors/error_500"
      end
  end

  def update
      if ( is_principal? )
            @classroom_grades = ClassroomGrade.all
            @subject = Subject.find(params[:id])
            @teacher = Teacher.find_by_registry(params[:teacher_registry])
            if ( @teacher.nil? )
                @subject.update(subject_params)
                render 'edit'
            else
                @subject.teacher_id = @teacher.id
              if ( @subject.update(subject_params) )
                    flash[:notice] = "Matéria alterada com sucesso"
                redirect_to @subject
            else
                render 'edit'
            end
        end
    else
      redirect_to "/errors/error_500"
        end
  end

  def add_classrooms
    if ( is_principal? )
      @classroom = Classroom.find(params[:id])
      @subjects = Subject.all
    end
  end

  def add_classroom
    if ( is_principal? )
      @classroom = Classroom.find(params[:id])
      @subject = Subject.find(params[:subject_id])
            if !((ClassroomSubject.where(classroom_id: @classroom.id).where(subject_id: @subject.id)).exists?)
                @classroom_subject = ClassroomSubject.new
                @classroom_subject.subject_id = @subject.id
                @classroom_subject.classroom_id = @classroom.id
                if @classroom_subject.save
                    flash[:success] = "Matéria adicionada com sucesso"
                    redirect_to add_classrooms_path(@classroom)
                end
            else
                flash[:alert] = "Matéria não pode ser adicionada ou já existe na turma"
                redirect_to add_classrooms_path(@classroom)
            end
    end
  end

  def show_subjects
    @classroom = Classroom.find(params[:id])
    @subjects = @classroom.subject
  end

  private
  def subject_params
      params.require(:subject).permit(:name_subject,
        :class_level,:teacher_id,:classroom_id,:subject_id, :classroom_grade_id)
  end
end