require "rails_helper"

RSpec.describe CaseLog do
  let(:owning_organisation) { FactoryBot.create(:organisation) }
  let(:managing_organisation) { owning_organisation }

  describe "#form" do
    let(:case_log) { FactoryBot.build(:case_log) }
    let(:case_log_2) { FactoryBot.build(:case_log, startdate: Time.zone.local(2022, 1, 1)) }
    let(:case_log_year_2) { FactoryBot.build(:case_log, startdate: Time.zone.local(2023, 5, 1)) }

    it "has returns the correct form based on the start date" do
      expect(case_log.form_name).to eq("2021_2022")
      expect(case_log_2.form_name).to eq("2021_2022")
      expect(case_log_year_2.form_name).to eq("2023_2024")
      expect(case_log.form).to be_a(Form)
    end
  end

  describe "#new" do
    context "when creating a record" do
      let(:case_log) do
        described_class.create(
          owning_organisation:,
          managing_organisation:,
        )
      end

      it "attaches the correct custom validator" do
        expect(case_log._validators.values.flatten.map(&:class))
          .to include(CaseLogValidator)
      end
    end

    # TODO: replace these with validator specs and checks for method call here
    context "with a reason for leaving last settled home validation" do
      it "checks the reason for leaving must be don’t know if reason for leaving settled home (Q9a) is don’t know." do
        expect {
          described_class.create!(reason: "Don’t know",
                                  underoccupation_benefitcap: "Yes - benefit cap",
                                  owning_organisation:,
                                  managing_organisation:)
        }.to raise_error(ActiveRecord::RecordInvalid)
      end
    end

    context "with reason for leaving last settled home validation set to other" do
      it "must be provided if main reason for leaving last settled home was given as other" do
        expect {
          described_class.create!(reason: "Other",
                                  other_reason_for_leaving_last_settled_home: nil,
                                  owning_organisation:,
                                  managing_organisation:)
        }.to raise_error(ActiveRecord::RecordInvalid)
      end

      it "must not be provided if the main reason for leaving settled home is not other" do
        expect {
          described_class.create!(reason: "Repossession",
                                  other_reason_for_leaving_last_settled_home: "the other reason provided",
                                  owning_organisation:,
                                  managing_organisation:)
        }.to raise_error(ActiveRecord::RecordInvalid)
      end
    end

    context "with armed forces injured validation" do
      it "must not be answered if tenant was not a regular or reserve in armed forces" do
        expect {
          described_class.create!(armedforces: "No",
                                  reservist: "Yes",
                                  owning_organisation:,
                                  managing_organisation:)
        }.to raise_error(ActiveRecord::RecordInvalid)
      end
    end

    context "when validating pregnancy questions" do
      it "Can answer yes if valid second tenant" do
        expect {
          described_class.create!(preg_occ: "Yes",
                                  sex1: "Male", age1: 99,
                                  sex2: "Female",
                                  age2: 20,
                                  owning_organisation:,
                                  managing_organisation:)
        }.not_to raise_error
      end
    end

    context "when validating property vacancy and let as" do
      it "cannot have a previously let as type, if it hasn't been let before" do
        expect {
          described_class.create!(
            first_time_property_let_as_social_housing: "No",
            unitletas: "Social rent basis",
            owning_organisation:,
            managing_organisation:,
          )
        }.not_to raise_error
        expect {
          described_class.create!(
            first_time_property_let_as_social_housing: "Yes",
            unitletas: "Social rent basis",
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)
        expect {
          described_class.create!(
            first_time_property_let_as_social_housing: "Yes",
            unitletas: "Affordable rent basis",
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)
        expect {
          described_class.create!(
            first_time_property_let_as_social_housing: "Yes",
            unitletas: "Intermediate rent basis",
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)
        expect {
          described_class.create!(
            first_time_property_let_as_social_housing: "Yes",
            unitletas: "Don’t know",
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)
      end

      it "must have a first let reason for vacancy if it's being let as social housing for the first time" do
        expect {
          described_class.create!(
            first_time_property_let_as_social_housing: "Yes",
            rsnvac: "First let of new-build property",
            owning_organisation:,
            managing_organisation:,
          )
        }.not_to raise_error
        expect {
          described_class.create!(
            first_time_property_let_as_social_housing: "Yes",
            rsnvac: "First let of conversion, rehabilitation or acquired property",
            owning_organisation:,
            managing_organisation:,
          )
        }.not_to raise_error
        expect {
          described_class.create!(
            first_time_property_let_as_social_housing: "Yes",
            rsnvac: "First let of leased property",
            owning_organisation:,
            managing_organisation:,
          )
        }.not_to raise_error
        expect {
          described_class.create!(
            first_time_property_let_as_social_housing: "Yes",
            rsnvac: "Tenant moved to care home",
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)
      end
    end

    context "when validating outstanding rent or charges" do
      it "must be not be anwered if answered no to outstanding rent or charges" do
        expect {
          described_class.create!(hbrentshortfall: "No",
                                  tshortfall: 99,
                                  owning_organisation:,
                                  managing_organisation:)
        }.to raise_error(ActiveRecord::RecordInvalid)
      end
    end

    context "with tenant’s income from Universal Credit, state pensions or benefits" do
      it "Cannot be All if person 1 works full time" do
        expect {
          described_class.create!(
            benefits: "All",
            ecstat1: "Full-time - 30 hours or more",
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)
      end

      it "Cannot be All if person 1 works part time" do
        expect {
          described_class.create!(
            benefits: "All",
            ecstat1: "Part-time - Less than 30 hours",
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)
      end

      it "Cannot be 1 All if any of persons 2-4 are person 1's partner and work part or full time" do
        expect {
          described_class.create!(
            benefits: "All",
            relat2: "Partner",
            ecstat2: "Part-time - Less than 30 hours",
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)
      end
    end

    context "when validating armed forces is active" do
      it "must not be answered if not ever served as a regular" do
        expect {
          described_class.create!(armedforces: "No",
                                  leftreg: "Yes",
                                  owning_organisation:,
                                  managing_organisation:)
        }.to raise_error(ActiveRecord::RecordInvalid)
      end

      # Crossover over tests here as injured must be answered as well for no error
      it "must be answered if ever served in the forces as a regular" do
        expect {
          described_class.create!(armedforces: "A current or former regular in the UK Armed Forces (excluding National Service)",
                                  leftreg: "Yes",
                                  reservist: "Yes",
                                  owning_organisation:,
                                  managing_organisation:)
        }.not_to raise_error
      end
    end

    context "when validating household members" do
      it "validate that persons aged under 16 must have relationship Child" do
        expect {
          described_class.create!(
            age2: 14,
            relat2: "Partner",
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)
      end

      it "validate that persons aged over 70 must be retired" do
        expect {
          described_class.create!(
            age2: 71,
            ecstat2: "Full-time - 30 hours or more",
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)
      end

      it "validate that a male, retired persons must be over 65" do
        expect {
          described_class.create!(
            age2: 64,
            sex2: "Male",
            ecstat2: "Retired",
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)
      end

      it "validate that a female, retired persons must be over 60" do
        expect {
          described_class.create!(
            age2: 59,
            sex2: "Female",
            ecstat2: "Retired",
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)
      end

      it "validate that persons aged under 16 must be a child (economically speaking)" do
        expect {
          described_class.create!(
            age2: 15,
            ecstat2: "Full-time - 30 hours or more",
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)
      end

      it "validate that persons aged between 16 and 19 that are a child must be a full time student or economic status refused" do
        expect {
          described_class.create!(
            age2: 17,
            relat2: "Child - includes young adult and grown-up",
            ecstat2: "Full-time - 30 hours or more",
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)
      end

      it "validate that persons aged under 16 must be a child relationship" do
        expect {
          described_class.create!(
            age2: 15,
            relat2: "Partner",
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)
      end

      it "validate that no more than 1 partner relationship exists" do
        expect {
          described_class.create!(
            relat2: "Partner",
            relat3: "Partner",
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)
      end
    end

    context "when validating other tenancy type" do
      it "must be provided if tenancy type was given as other" do
        expect {
          described_class.create!(tenancy: "Other",
                                  tenancyother: nil,
                                  owning_organisation:,
                                  managing_organisation:)
        }.to raise_error(ActiveRecord::RecordInvalid)

        expect {
          described_class.create!(tenancy: "Other",
                                  tenancyother: "type",
                                  owning_organisation:,
                                  managing_organisation:)
        }.not_to raise_error
      end

      it "must not be provided if tenancy type is not other" do
        expect {
          described_class.create!(tenancy: "Secure (including flexible)",
                                  tenancyother: "the other reason provided",
                                  owning_organisation:,
                                  managing_organisation:)
        }.to raise_error(ActiveRecord::RecordInvalid)

        expect {
          described_class.create!(tenancy: "Secure (including flexible)",
                                  tenancyother: nil,
                                  owning_organisation:,
                                  managing_organisation:)
        }.not_to raise_error
      end
    end

    context "when saving income ranges" do
      it "validates net income maximum" do
        expect {
          described_class.create!(
            ecstat1: "Full-time - 30 hours or more",
            earnings: 5000,
            incfreq: "Weekly",
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)
      end

      it "validates net income minimum" do
        expect {
          described_class.create!(
            ecstat1: "Full-time - 30 hours or more",
            earnings: 1,
            incfreq: "Weekly",
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)
      end

      context "with an income in upper soft range" do
        let(:case_log) do
          FactoryBot.create(:case_log,
                            ecstat1: "Full-time - 30 hours or more",
                            earnings: 750,
                            incfreq: "Weekly")
        end

        it "updates soft errors" do
          expect(case_log.has_no_unresolved_soft_errors?).to be false
          expect(case_log.soft_errors["override_net_income_validation"].message)
            .to match(I18n.t("soft_validations.net_income.in_soft_max_range.message"))
        end
      end

      context "with an income in lower soft validation range" do
        let(:case_log) do
          FactoryBot.create(:case_log,
                            ecstat1: "Full-time - 30 hours or more",
                            earnings: 120,
                            incfreq: "Weekly")
        end

        it "updates soft errors" do
          expect(case_log.has_no_unresolved_soft_errors?).to be false
          expect(case_log.soft_errors["override_net_income_validation"].message)
            .to match(I18n.t("soft_validations.net_income.in_soft_min_range.message"))
        end
      end
    end

    context "when validating major repairs date" do
      it "cannot be later than the tenancy start date" do
        expect {
          described_class.create!(
            mrcdate: Date.new(2021, 10, 10),
            startdate: Date.new(2021, 10, 9),
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)

        expect {
          described_class.create!(
            mrcdate: Date.new(2021, 10, 9),
            startdate: Date.new(2021, 10, 10),
            owning_organisation:,
            managing_organisation:,
          )
        }.not_to raise_error
      end

      it "must not be completed if reason for vacancy is first let" do
        expect {
          described_class.create!(
            mrcdate: Date.new(2020, 10, 10),
            rsnvac: "First let of new-build property",
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)

        expect {
          described_class.create!(
            mrcdate: Date.new(2020, 10, 10),
            rsnvac: "First let of conversion, rehabilitation or acquired property",
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)

        expect {
          described_class.create!(
            mrcdate: Date.new(2020, 10, 10),
            rsnvac: "First let of leased property",
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)
      end

      it "must have less than two years between the tenancy start date and major repairs date" do
        expect {
          described_class.create!(
            startdate: Date.new(2021, 10, 10),
            mrcdate: Date.new(2017, 10, 10),
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)
      end
    end

    context "when saving void date" do
      it "must have less than 10 years between the tenancy start date and void" do
        expect {
          described_class.create!(
            startdate: Date.new(2021, 10, 10),
            property_void_date: Date.new(2009, 10, 10),
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)

        expect {
          described_class.create!(
            startdate: Date.new(2021, 10, 10),
            property_void_date: Date.new(2015, 10, 10),
            owning_organisation:,
            managing_organisation:,
          )
        }.not_to raise_error
      end

      it "must be before the tenancy start date" do
        expect {
          described_class.create!(
            startdate: Date.new(2021, 10, 10),
            property_void_date: Date.new(2021, 10, 11),
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)

        expect {
          described_class.create!(
            startdate: Date.new(2021, 10, 10),
            property_void_date: Date.new(2019, 10, 10),
            owning_organisation:,
            managing_organisation:,
          )
        }.not_to raise_error
      end

      it "must be before major repairs date if major repairs date provided" do
        expect {
          described_class.create!(
            startdate: Date.new(2021, 10, 10),
            mrcdate: Date.new(2019, 10, 10),
            property_void_date: Date.new(2019, 11, 11),
            owning_organisation:,
            managing_organisation:,
          )
        }.to raise_error(ActiveRecord::RecordInvalid)
      end
    end

    context "when validating local authority" do
      it "Has to be london if rent type london affordable rent" do
        expect {
          described_class.create!(la: "Ashford",
                                  rent_type: "London Affordable rent",
                                  owning_organisation:,
                                  managing_organisation:)
        }.to raise_error(ActiveRecord::RecordInvalid)

        expect {
          described_class.create!(la: "Westminster",
                                  rent_type: "London Affordable rent",
                                  owning_organisation:,
                                  managing_organisation:)
        }.not_to raise_error
      end
    end

    context "with accessibility requirements" do
      it "validates that only one option can be selected" do
        expect {
          described_class.create!(housingneeds_a: "Yes",
                                  housingneeds_b: "Yes",
                                  rent_type: "London Affordable rent",
                                  owning_organisation:,
                                  managing_organisation:)
        }.to raise_error(ActiveRecord::RecordInvalid)
      end

      it "validates that only one option a, b, or c can be selected in conjunction with f" do
        expect {
          described_class.create!(housingneeds_a: "Yes",
                                  housingneeds_f: "Yes",
                                  rent_type: "London Affordable rent",
                                  owning_organisation:,
                                  managing_organisation:)
        }.not_to raise_error

        expect {
          described_class.create!(housingneeds_b: "Yes",
                                  housingneeds_f: "Yes",
                                  rent_type: "London Affordable rent",
                                  owning_organisation:,
                                  managing_organisation:)
        }.not_to raise_error

        expect {
          described_class.create!(housingneeds_c: "Yes",
                                  housingneeds_f: "Yes",
                                  rent_type: "London Affordable rent",
                                  owning_organisation:,
                                  managing_organisation:)
        }.not_to raise_error

        expect {
          described_class.create!(housingneeds_g: "Yes",
                                  housingneeds_f: "Yes",
                                  rent_type: "London Affordable rent",
                                  owning_organisation:,
                                  managing_organisation:)
        }.to raise_error(ActiveRecord::RecordInvalid)

        expect {
          described_class.create!(housingneeds_a: "Yes",
                                  housingneeds_b: "Yes",
                                  housingneeds_f: "Yes",
                                  rent_type: "London Affordable rent",
                                  owning_organisation:,
                                  managing_organisation:)
        }.to raise_error(ActiveRecord::RecordInvalid)
      end
    end

    context "when validating reason for vacancy" do
      def check_rsnvac_validation(prevten)
        expect {
          described_class.create!(rsnvac: "Relet to tenant who occupied same property as temporary accommodation",
                                  prevten:,
                                  owning_organisation:,
                                  managing_organisation:)
        }.to raise_error(ActiveRecord::RecordInvalid)
      end

      def check_rsnvac_referral_validation(referral)
        expect {
          described_class.create!(rsnvac: "Relet to tenant who occupied same property as temporary accommodation",
                                  referral:,
                                  owning_organisation:,
                                  managing_organisation:)
        }.to raise_error(ActiveRecord::RecordInvalid)
      end

      it "cannot be temp accommodation if previous tenancy was non temp" do
        check_rsnvac_validation("Tied housing or rented with job")
        check_rsnvac_validation("Supported housing")
        check_rsnvac_validation("Sheltered accommodation")
        check_rsnvac_validation("Home Office Asylum Support")
        check_rsnvac_validation("Any other accommodation")
      end

      it "cannot be temp accommodation if source of letting referral " do
        check_rsnvac_referral_validation("Re-located through official housing mobility scheme")
        check_rsnvac_referral_validation("Other social landlord")
        check_rsnvac_referral_validation("Police, probation or prison")
        check_rsnvac_referral_validation("Youth offending team")
        check_rsnvac_referral_validation("Community mental health team")
        check_rsnvac_referral_validation("Health service")
      end
    end
    # END TODO
  end

  describe "#update" do
    let(:case_log) { FactoryBot.create(:case_log) }
    let(:validator) { case_log._validators[nil].first }

    after do
      case_log.update(age1: 25)
    end

    it "validates ages" do
      expect(validator).to receive(:validate_person_1_age)
      expect(validator).to receive(:validate_household_number_of_other_members)
    end

    it "validates bedroom number" do
      expect(validator).to receive(:validate_shared_housing_rooms)
    end

    it "validates number of times the property has been relet" do
      expect(validator).to receive(:validate_property_number_of_times_relet)
    end

    it "validates tenancy length for tenancy type" do
      expect(validator).to receive(:validate_fixed_term_tenancy)
    end

    it "validates the previous postcode" do
      expect(validator).to receive(:validate_previous_accommodation_postcode)
    end

    it "validates the net income" do
      expect(validator).to receive(:validate_net_income)
    end

    it "validates reasonable preference" do
      expect(validator).to receive(:validate_reasonable_preference)
    end
  end

  describe "status" do
    let!(:empty_case_log) { FactoryBot.create(:case_log) }
    let!(:in_progress_case_log) { FactoryBot.create(:case_log, :in_progress) }
    let!(:completed_case_log) { FactoryBot.create(:case_log, :completed) }

    it "is set to not started for an empty case log" do
      expect(empty_case_log.not_started?).to be(true)
      expect(empty_case_log.in_progress?).to be(false)
      expect(empty_case_log.completed?).to be(false)
    end

    it "is set to in progress for a started case log" do
      expect(in_progress_case_log.in_progress?).to be(true)
      expect(in_progress_case_log.not_started?).to be(false)
      expect(in_progress_case_log.completed?).to be(false)
    end

    it "is set to completed for a completed case log" do
      expect(completed_case_log.in_progress?).to be(false)
      expect(completed_case_log.not_started?).to be(false)
      expect(completed_case_log.completed?).to be(true)
    end
  end

  describe "weekly_net_income" do
    let(:net_income) { 5000 }
    let(:case_log) { FactoryBot.build(:case_log, earnings: net_income) }

    it "returns input income if frequency is already weekly" do
      case_log.incfreq = "Weekly"
      expect(case_log.weekly_net_income).to eq(net_income)
    end

    it "calculates the correct weekly income from monthly income" do
      case_log.incfreq = "Monthly"
      expect(case_log.weekly_net_income).to eq(1154)
    end

    it "calculates the correct weekly income from yearly income" do
      case_log.incfreq = "Yearly"
      expect(case_log.weekly_net_income).to eq(417)
    end
  end

  describe "derived variables" do
    let(:organisation) { FactoryBot.create(:organisation, provider_type: "PRP") }
    let!(:case_log) do
      described_class.create({
        managing_organisation: organisation,
        owning_organisation: organisation,
        property_postcode: "M1 1AE",
        previous_postcode: "M2 2AE",
        startdate: Time.gm(2021, 10, 10),
        mrcdate: Time.gm(2021, 5, 4),
        net_income_known: "Tenant prefers not to say",
        other_hhmemb: 6,
        rent_type: "London living rent",
        needstype: "General needs",
        hb: "Housing benefit",
        hbrentshortfall: "No",
      })
    end

    it "correctly derives and saves partial and full postcodes" do
      record_from_db = ActiveRecord::Base.connection.execute("select postcode, postcod2 from case_logs where id=#{case_log.id}").to_a[0]
      expect(record_from_db["postcode"]).to eq("M1")
      expect(record_from_db["postcod2"]).to eq("1AE")
    end

    it "correctly derives and saves partial and full previous postcodes" do
      record_from_db = ActiveRecord::Base.connection.execute("select ppostc1, ppostc2 from case_logs where id=#{case_log.id}").to_a[0]
      expect(record_from_db["ppostc1"]).to eq("M2")
      expect(record_from_db["ppostc2"]).to eq("2AE")
    end

    it "correctly derives and saves partial and full major repairs date" do
      record_from_db = ActiveRecord::Base.connection.execute("select mrcday, mrcmonth, mrcyear, mrcdate from case_logs where id=#{case_log.id}").to_a[0]
      expect(record_from_db["mrcdate"].day).to eq(4)
      expect(record_from_db["mrcdate"].month).to eq(5)
      expect(record_from_db["mrcdate"].year).to eq(2021)
      expect(record_from_db["mrcday"]).to eq(4)
      expect(record_from_db["mrcmonth"]).to eq(5)
      expect(record_from_db["mrcyear"]).to eq(2021)
    end

    it "correctly derives and saves incref" do
      record_from_db = ActiveRecord::Base.connection.execute("select incref from case_logs where id=#{case_log.id}").to_a[0]
      expect(record_from_db["incref"]).to eq(1)
    end

    it "correctly derives and saves hhmemb" do
      record_from_db = ActiveRecord::Base.connection.execute("select hhmemb from case_logs where id=#{case_log.id}").to_a[0]
      expect(record_from_db["hhmemb"]).to eq(7)
    end

    it "correctly derives and saves renttype" do
      record_from_db = ActiveRecord::Base.connection.execute("select renttype from case_logs where id=#{case_log.id}").to_a[0]
      expect(case_log.renttype).to eq("Intermediate Rent")
      expect(record_from_db["renttype"]).to eq(3)
    end

    it "correctly derives and saves lettype" do
      record_from_db = ActiveRecord::Base.connection.execute("select lettype from case_logs where id=#{case_log.id}").to_a[0]
      expect(case_log.lettype).to eq("Intermediate Rent General needs PRP")
      expect(record_from_db["lettype"]).to eq(9)
    end

    it "correctly derives and saves day, month, year from start date" do
      record_from_db = ActiveRecord::Base.connection.execute("select day, month, year, startdate from case_logs where id=#{case_log.id}").to_a[0]
      expect(record_from_db["startdate"].day).to eq(10)
      expect(record_from_db["startdate"].month).to eq(10)
      expect(record_from_db["startdate"].year).to eq(2021)
      expect(record_from_db["day"]).to eq(10)
      expect(record_from_db["month"]).to eq(10)
      expect(record_from_db["year"]).to eq(2021)
    end

    context "when any charge field is set" do
      before do
        case_log.update!(pscharge: 10)
      end

      it "derives that any blank ones are 0" do
        record_from_db = ActiveRecord::Base.connection.execute("select supcharg, scharge from case_logs where id=#{case_log.id}").to_a[0]
        expect(record_from_db["supcharg"].to_f).to eq(0.0)
        expect(record_from_db["scharge"].to_f).to eq(0.0)
      end
    end

    context "when saving addresses" do
      before do
        stub_request(:get, /api.postcodes.io/)
          .to_return(status: 200, body: "{\"status\":200,\"result\":{\"admin_district\":\"Manchester\"}}", headers: {})
      end

      let!(:address_case_log) do
        described_class.create({
          managing_organisation: organisation,
          owning_organisation: organisation,
          postcode_known: "Yes",
          property_postcode: "M1 1AE",
        })
      end

      it "correctly infers la" do
        record_from_db = ActiveRecord::Base.connection.execute("select la from case_logs where id=#{address_case_log.id}").to_a[0]
        expect(address_case_log.la).to eq("Manchester")
        expect(record_from_db["la"]).to eq("E08000003")
      end

      it "errors if the property postcode is emptied" do
        expect { address_case_log.update!({ property_postcode: "" }) }
          .to raise_error(ActiveRecord::RecordInvalid, /#{I18n.t("validations.postcode")}/)
      end

      it "errors if the property postcode is not valid" do
        expect { address_case_log.update!({ property_postcode: "invalid_postcode" }) }
          .to raise_error(ActiveRecord::RecordInvalid, /#{I18n.t("validations.postcode")}/)
      end

      it "correctly resets all fields if property postcode not known" do
        address_case_log.update!({ postcode_known: "No" })

        record_from_db = ActiveRecord::Base.connection.execute("select la, property_postcode from case_logs where id=#{address_case_log.id}").to_a[0]
        expect(record_from_db["property_postcode"]).to eq(nil)
        expect(address_case_log.la).to eq(nil)
        expect(record_from_db["la"]).to eq(nil)
      end

      it "changes the LA if property postcode changes from not known to known and provided" do
        address_case_log.update!({ postcode_known: "No" })
        address_case_log.update!({ la: "Westminster" })

        record_from_db = ActiveRecord::Base.connection.execute("select la, property_postcode from case_logs where id=#{address_case_log.id}").to_a[0]
        expect(record_from_db["property_postcode"]).to eq(nil)
        expect(address_case_log.la).to eq("Westminster")
        expect(record_from_db["la"]).to eq("E09000033")

        address_case_log.update!({ postcode_known: "Yes", property_postcode: "M1 1AD" })

        record_from_db = ActiveRecord::Base.connection.execute("select la, property_postcode from case_logs where id=#{address_case_log.id}").to_a[0]
        expect(record_from_db["property_postcode"]).to eq("M1 1AD")
        expect(address_case_log.la).to eq("Manchester")
        expect(record_from_db["la"]).to eq("E08000003")
      end
    end

    context "when saving previous address" do
      before do
        stub_request(:get, /api.postcodes.io/)
          .to_return(status: 200, body: "{\"status\":200,\"result\":{\"admin_district\":\"Manchester\"}}", headers: {})
      end

      let!(:address_case_log) do
        described_class.create({
          managing_organisation: organisation,
          owning_organisation: organisation,
          previous_postcode_known: "Yes",
          previous_postcode: "M1 1AE",
        })
      end

      it "correctly infers prevloc" do
        record_from_db = ActiveRecord::Base.connection.execute("select prevloc from case_logs where id=#{address_case_log.id}").to_a[0]
        expect(address_case_log.prevloc).to eq("Manchester")
        expect(record_from_db["prevloc"]).to eq("E08000003")
      end

      it "errors if the previous postcode is emptied" do
        expect { address_case_log.update!({ previous_postcode: "" }) }
          .to raise_error(ActiveRecord::RecordInvalid, /#{I18n.t("validations.postcode")}/)
      end

      it "errors if the previous postcode is not valid" do
        expect { address_case_log.update!({ previous_postcode: "invalid_postcode" }) }
          .to raise_error(ActiveRecord::RecordInvalid, /#{I18n.t("validations.postcode")}/)
      end

      it "correctly resets all fields if previous postcode not known" do
        address_case_log.update!({ previous_postcode_known: "No" })

        record_from_db = ActiveRecord::Base.connection.execute("select prevloc, previous_postcode from case_logs where id=#{address_case_log.id}").to_a[0]
        expect(record_from_db["previous_postcode"]).to eq(nil)
        expect(address_case_log.prevloc).to eq(nil)
        expect(record_from_db["prevloc"]).to eq(nil)
      end

      it "changes the prevloc if previous postcode changes from not known to known and provided" do
        address_case_log.update!({ previous_postcode_known: "No" })
        address_case_log.update!({ prevloc: "Westminster" })

        record_from_db = ActiveRecord::Base.connection.execute("select prevloc, previous_postcode from case_logs where id=#{address_case_log.id}").to_a[0]
        expect(record_from_db["previous_postcode"]).to eq(nil)
        expect(address_case_log.prevloc).to eq("Westminster")
        expect(record_from_db["prevloc"]).to eq("E09000033")

        address_case_log.update!({ previous_postcode_known: "Yes", previous_postcode: "M1 1AD" })

        record_from_db = ActiveRecord::Base.connection.execute("select prevloc, previous_postcode from case_logs where id=#{address_case_log.id}").to_a[0]
        expect(record_from_db["previous_postcode"]).to eq("M1 1AD")
        expect(address_case_log.prevloc).to eq("Manchester")
        expect(record_from_db["prevloc"]).to eq("E08000003")
      end
    end

    context "when saving rent and charges" do
      let!(:case_log) do
        described_class.create({
          managing_organisation: organisation,
          owning_organisation: organisation,
          brent: 5.77,
          scharge: 10.01,
          pscharge: 3,
          supcharg: 12.2,
        })
      end

      it "correctly sums rental charges" do
        record_from_db = ActiveRecord::Base.connection.execute("select tcharge from case_logs where id=#{case_log.id}").to_a[0]
        expect(record_from_db["tcharge"]).to eq(30.98)
      end
    end

    context "when validating household members derived vars" do
      let!(:household_case_log) do
        described_class.create({
          managing_organisation: organisation,
          owning_organisation: organisation,
          other_hhmemb: 4,
          relat2: "Child - includes young adult and grown-up",
          relat3: "Child - includes young adult and grown-up",
          relat4: "Other",
          relat5: "Child - includes young adult and grown-up",
          relat7: "Other",
          relat8: "Other",
          age1: 22,
          age2: 14,
          age4: 60,
          age6: 88,
          age7: 16,
          age8: 42,
        })
      end

      it "correctly derives and saves totchild" do
        record_from_db = ActiveRecord::Base.connection.execute("select totchild from case_logs where id=#{household_case_log.id}").to_a[0]
        expect(record_from_db["totchild"]).to eq(3)
      end

      it "correctly derives and saves totelder" do
        record_from_db = ActiveRecord::Base.connection.execute("select totelder from case_logs where id=#{household_case_log.id}").to_a[0]
        expect(record_from_db["totelder"]).to eq(2)
      end

      it "correctly derives and saves totadult" do
        record_from_db = ActiveRecord::Base.connection.execute("select totadult from case_logs where id=#{household_case_log.id}").to_a[0]
        expect(record_from_db["totadult"]).to eq(3)
      end
    end

    it "correctly derives and saves has_benefits" do
      case_log.reload

      record_from_db = ActiveRecord::Base.connection.execute("select has_benefits from case_logs where id=#{case_log.id}").to_a[0]
      expect(record_from_db["has_benefits"]).to eq("Yes")
    end

    context "when it is a renewal" do
      let!(:case_log) do
        described_class.create({
          managing_organisation: organisation,
          owning_organisation: organisation,
          renewal: "Yes",
          year: 2021,
        })
      end

      it "correctly derives and saves layear" do
        record_from_db = ActiveRecord::Base.connection.execute("select layear from case_logs where id=#{case_log.id}").to_a[0]
        expect(record_from_db["layear"]).to eq(2)
        expect(case_log["layear"]).to eq("Less than 1 year")
      end

      it "correctly derives and saves underoccupation_benefitcap if year is 2021" do
        record_from_db = ActiveRecord::Base.connection.execute("select underoccupation_benefitcap from case_logs where id=#{case_log.id}").to_a[0]
        expect(record_from_db["underoccupation_benefitcap"]).to eq(2)
        expect(case_log["underoccupation_benefitcap"]).to eq("No")
      end

      it "correctly derives and saves homeless" do
        record_from_db = ActiveRecord::Base.connection.execute("select homeless from case_logs where id=#{case_log.id}").to_a[0]
        expect(record_from_db["homeless"]).to eq(1)
        expect(case_log["homeless"]).to eq("No")
      end
    end
  end

  describe "resetting invalidated fields" do
    context "when a question that has already been answered, no longer has met dependencies" do
      let(:case_log) { FactoryBot.create(:case_log, :in_progress, cbl: "Yes", preg_occ: "No") }

      it "clears the answer" do
        expect { case_log.update!(preg_occ: nil) }.to change(case_log, :cbl).from("Yes").to(nil)
      end
    end

    context "with two pages having the same question key, only one's dependency is met" do
      let(:case_log) { FactoryBot.create(:case_log, :in_progress, cbl: "Yes", preg_occ: "No") }

      it "does not clear the answer" do
        expect(case_log.cbl).to eq("Yes")
      end
    end
  end

  describe "paper trail" do
    let(:case_log) { FactoryBot.create(:case_log, :in_progress) }

    it "creates a record of changes to a log" do
      expect { case_log.update!(age1: 64) }.to change(case_log.versions, :count).by(1)
    end

    it "allows case logs to be restored to a previous version" do
      case_log.update!(age1: 63)
      expect(case_log.paper_trail.previous_version.age1).to eq(17)
    end
  end
end