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 be_nil
      expect(case_log.form).to be_a(Form)
      expect(case_log_2.form_name).to eq("2021_2022")
      expect(case_log_2.form).to be_a(Form)
      expect(case_log_year_2.form_name).to eq("2023_2024")
      expect(case_log_year_2.form).to be_a(Form)
    end

    context "when a date outside the collection window is passed" do
      let(:case_log) { FactoryBot.build(:case_log, startdate: Time.zone.local(2015, 1, 1)) }

      it "returns the first form" do
        expect(case_log.form).to be_a(Form)
        expect(case_log.form.start_date.year).to eq(2021)
      end
    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 "when saving income ranges" do
      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 "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 start date" do
      expect(validator).to receive(:validate_startdate)
    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 type" do
      expect(validator).to receive(:validate_fixed_term_tenancy)
      expect(validator).to receive(:validate_other_tenancy_type)
    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

    it "validates reason for leaving last settled home" do
      expect(validator).to receive(:validate_reason_for_leaving_last_settled_home)
    end

    it "validates armed forces" do
      expect(validator).to receive(:validate_armed_forces)
    end

    it "validates property major repairs date" do
      expect(validator).to receive(:validate_property_major_repairs)
    end

    it "validates property void date" do
      expect(validator).to receive(:validate_property_void_date)
    end

    it "validates local authority" do
      expect(validator).to receive(:validate_la)
    end

    it "validates benefits as proportion of income" do
      expect(validator).to receive(:validate_net_income_uc_proportion)
    end

    it "validates outstanding rent amount" do
      expect(validator).to receive(:validate_outstanding_rent_amount)
    end

    it "validates housing benefit rent shortfall" do
      expect(validator).to receive(:validate_tshortfall)
    end

    it "validates let type" do
      expect(validator).to receive(:validate_unitletas)
    end

    it "validates reason for vacancy" do
      expect(validator).to receive(:validate_rsnvac)
    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

    context "when the case log does not have a valid form set yet" do
      let(:case_log) { FactoryBot.create(:case_log) }

      it "does not throw an error" do
        expect { case_log.update(startdate: Time.zone.local(2015, 1, 1)) }.not_to raise_error
      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