class FormController < ApplicationController
  before_action :authenticate_user!
  before_action :find_resource, only: [:submit_form]
  before_action :find_resource_by_named_id, except: [:submit_form]

  def submit_form
    if @case_log
      page = @case_log.form.get_page(params[:case_log][:page])
      responses_for_page = responses_for_page(page)
      if @case_log.update(responses_for_page) && @case_log.has_no_unresolved_soft_errors?
        redirect_path = @case_log.form.next_page_redirect_path(page, @case_log)
        redirect_to(send(redirect_path, @case_log))
      else
        subsection = @case_log.form.subsection_for_page(page)
        render "form/page", locals: { page: page, subsection: subsection.label }, status: :unprocessable_entity
      end
    else
      render_not_found
    end
  end

  def check_answers
    if @case_log
      current_url = request.env["PATH_INFO"]
      subsection = @case_log.form.get_subsection(current_url.split("/")[-2])
      render "form/check_answers", locals: { subsection: subsection }
    else
      render_not_found
    end
  end

  FormHandler.instance.forms.each do |_key, form|
    form.pages.map do |page|
      define_method(page.id) do |_errors = {}|
        if @case_log
          subsection = @case_log.form.subsection_for_page(page)
          case_log_form_page = @case_log.form.get_page(page.id)
          render "form/page", locals: { page: case_log_form_page, subsection: subsection.label }
        else
          render_not_found
        end
      end
    end
  end

private

  def responses_for_page(page)
    page.expected_responses.each_with_object({}) do |question, result|
      question_params = params["case_log"][question.id]
      if question.type == "date"
        day = params["case_log"]["#{question.id}(3i)"]
        month = params["case_log"]["#{question.id}(2i)"]
        year = params["case_log"]["#{question.id}(1i)"]
        next unless [day, month, year].any?(&:present?)

        result[question.id] = if day.to_i.between?(1, 31) && month.to_i.between?(1, 12) && year.to_i.between?(2000, 2200)
                                Date.new(year.to_i, month.to_i, day.to_i)
                              else
                                Date.new(0, 1, 1)
                              end
      end
      next unless question_params

      if %w[checkbox validation_override].include?(question.type)
        question.answer_options.keys.reject { |x| x.match(/divider/) }.each do |option|
          result[option] = question_params.include?(option) ? 1 : 0
        end
      else
        result[question.id] = question_params
      end
      result
    end
  end

  def find_resource
    @case_log = current_user.case_logs.find_by(id: params[:id])
  end

  def find_resource_by_named_id
    @case_log = current_user.case_logs.find_by(id: params[:case_log_id])
  end
end