ministryofjustice/Claim-for-Crown-Court-Defence

module Claim
  class InterimClaimValidator < Claim::BaseClaimValidator
    include Claim::LitigatorCommonValidations

    def self.fields_for_steps
      {
        case_details: %i[
          case_type_id
          court_id
          case_number
          case_transferred_from_another_court
          transfer_court_id
          transfer_case_number
          case_concluded_at
          main_hearing_date
        ],
        defendants: [],
        offence_details: %i[offence],
        interim_fees: %i[
          trial_dates
          estimated_trial_length
          retrial_started_at
          retrial_estimated_length
          effective_pcmh_date
          legal_aid_transfer_date
          total
        ],
        travel_expenses: %i[travel_expense_additional_information],
        supporting_evidence: []
      }
    end

    private

    def validate_case_type_id
      super
      validate_inclusion(:case_type_id, @record.eligible_case_types.pluck(:id), :inclusion)
    end

    def interim_fee_absent?
      @record.interim_fee.nil?
    end

    def validate_case_concluded_at
      validate_absence(:case_concluded_at, :present)
    end

    def validate_trial_dates
      validate_first_day_of_trial
      validate_trial_concluded_at
    end

    def validate_first_day_of_trial
      return if interim_fee_absent?

      if @record.interim_fee.is_trial_start?
        validate_presence(:first_day_of_trial, :blank)
      elsif @record.errors[:first_day_of_trial].empty?
        validate_absence(:first_day_of_trial, :present)
      end
    end

    def validate_estimated_trial_length
      return if interim_fee_absent?

      if @record.interim_fee.is_trial_start?
        validate_presence_and_length(:estimated_trial_length)
      else
        validate_absence_or_zero(:estimated_trial_length, :present)
      end
    end

    def validate_trial_concluded_at
      return if interim_fee_absent?

      if @record.interim_fee.is_retrial_new_solicitor?
        validate_presence_and_not_in_future(:trial_concluded_at)
      else
        validate_absence(:trial_concluded_at, :present)
      end

      validate_on_or_after(120.years.ago, :trial_concluded_at, :check_not_too_far_in_past)
    end

    def validate_retrial_started_at
      return if interim_fee_absent?

      if @record.interim_fee.is_retrial_start?
        validate_presence_and_not_in_future(:retrial_started_at)
      else
        validate_absence(:retrial_started_at, :present)
      end

      validate_on_or_after(120.years.ago, :retrial_started_at, :check_not_too_far_in_past)
    end

    def validate_retrial_estimated_length
      return if interim_fee_absent?

      if @record.interim_fee.is_retrial_start?
        validate_presence_and_length(:retrial_estimated_length)
      else
        validate_absence_or_zero(:retrial_estimated_length, :present)
      end
    end

    def validate_effective_pcmh_date
      return if interim_fee_absent?

      if @record.interim_fee.is_effective_pcmh?
        validate_presence_and_not_in_future(:effective_pcmh_date)
      else
        validate_absence(:effective_pcmh_date, :present)
      end
    end

    def validate_legal_aid_transfer_date
      return if interim_fee_absent?

      if @record.interim_fee.is_retrial_new_solicitor?
        validate_presence_and_not_in_future(:legal_aid_transfer_date)
      else
        validate_absence(:legal_aid_transfer_date, :present)
      end

      validate_on_or_after(120.years.ago, :legal_aid_transfer_date, :check_not_too_far_in_past)
    end

    # helpers for common validation combos
    #
    def validate_presence_and_not_in_future(attribute)
      validate_presence(attribute, :blank)
      validate_not_in_future(attribute)
    end

    def validate_presence_and_length(attribute)
      validate_presence(attribute, :blank)
      # an interim fee cannot be claimed unless the trial will last 10 days or more
      validate_numericality(attribute, :interim_invalid, 10, nil)
    end
  end
end