class Admin::Covid::EmployeeScreeningsController < Admin::Covid::Controller
  include DateRangeHelper

  def index
    items = screenings
      .preload(:employee, answers: :options)
      .by_date_range(datetime_range(params[:date_range]))
      .map { |s| screening_props(s) }

    render_success :ok, json: { headers: form_headers, items: items }
  end

  def new
    render_success :ok, json: Covid::ScreeningForm.call(current_school, true)
  end

  def create
    form = employee.covid_screenings.build(date: params[:date])
    form_questions.each do |question|
      answer = params[:answers].find { |a| a[:field_id] == question.id }[:value]
      if question.has_options?
        form_answer = form.answers.build(question: question)
        form_answer.options = options_by_question[question.id]
      else
        form.answers.build(question: question, value: answer)
      end
    end

    if form.save
      render_success :ok
    else
      render_error :unprocessable_entity, errors: form
    end
  end

  def destroy
    if screening.destroy
      render_success :ok
    else
      render_error :unprocessable_entity, errors: screening
    end
  end

  def employee_count
    count = screenings.by_date(params[:date]).count

    render_success :ok, json: { count: count, total: employees.count }
  end

  def employee_search
    data = employees
      .by_covid_screening_submissions(params[:submitted]&.to_bool, params[:date])
      .ordered

    render_success :ok, json: data.map { |e| employee_props(e) }
  end

  def export
    Reporting::Covid::EmployeeScreeningJob.perform_async(
      current_school.id,
      current_user.id,
      date_range: params[:date_range]
    )
  end

  def google_export
    Google::Covid::EmployeeScreeningJob.perform_async(
      current_school.id,
      current_user.id,
      date_range: params[:date_range]
    )
  end

  private
    def screenings
      current_school.covid_employee_screenings
    end

    def screening
      @screening ||= screenings.find_by(id: params[:id])
    end

    def employees
      current_school.employees.by_status(true)
    end

    def employee
      @employee ||= employees.find_by(id: params[:employee_id])
    end

    def submitted_screenings_by_employee_id
      @submitted_screenings_by_employee_id ||= screenings.by_date(params[:date]).pluck(:employee_id)
    end

    def form_headers
      attributes = [
        { text: 'Date/Time', value: 'datetime' },
        { text: 'Last Name', value: 'last_name' },
        { text: 'First Name', value: 'first_name' }
      ]
      attributes + questions.map { |i| { text: i.title, value: i.id.to_s } }
    end

    def form_questions
      questions.where(id: params[:answers].pluck(:field_id))
    end

    def questions
      @questions ||= current_school.covid_form_questions
        .by_employee_field(true)
        .order('covid_form_sections.sequence ASC', :sequence)
    end

    def options_by_question
      @options_by_question ||= current_school.covid_form_options
        .where(id: params[:answers].pluck(:value).flatten)
        .group_by(&:field_id)
    end

    def screening_props(screening)
      {}.tap do |prop|
        prop[:id] = screening.id
        prop[:datetime] = screening.created_at
        prop[:first_name] = screening.employee.first_name
        prop[:last_name] = screening.employee.last_name
        questions.map do |question|
          answers = screening.answers.find { |a| a.question_id == question.id }
          prop[question.id] = if question.has_options?
            answers&.options&.map(&:value)&.join(' ')
          else
            answers&.value
          end
        end
      end
    end

    def employee_props(employee)
      {}.tap do |props|
        props[:id] = employee.id
        props[:full_name] = employee.full_name(:reverse)
        return props if params[:date].nil?

        props[:date] = params[:date]
        props[:submitted] = submitted_screenings_by_employee_id.include?(employee.id)
      end
    end

    def permissions
      ['write', 'manage']
    end
end