require "rails_helper"
require "rake"

RSpec.describe "clear_confidential_address_data" do
  describe ":clear_confidential_address_data", type: :task do
    subject(:task) { Rake::Task["clear_confidential_address_data"] }

    before do
      Rake.application.rake_require("tasks/clear_confidential_address_data")
      Rake::Task.define_task(:environment)
      task.reenable
    end

    let(:owning_organisation) { create(:organisation) }
    let(:scheme) { create(:scheme, sensitive: "Yes", owning_organisation:) }
    let(:non_confidential_scheme) { create(:scheme, sensitive: "No", owning_organisation:) }
    let(:location) { create(:location, scheme:) }

    let(:cleared_fields) do
      %w[
        uprn
        uprn_known
        uprn_confirmed
        uprn_selection
        address_line1
        address_line2
        town_or_city
        county
        postcode_full
        postcode_known
        address_line1_input
        postcode_full_input
        address_line1_as_entered
        address_line2_as_entered
        town_or_city_as_entered
        county_as_entered
        postcode_full_as_entered
        la_as_entered
        address_search_value_check
        la
      ]
    end

    def create_log_with_address_data(scheme:, location:, startdate:)
      log = create(
        :lettings_log,
        :completed,
        :sh,
        :ignore_validation_errors,
        owning_organisation:,
        managing_organisation: owning_organisation,
        scheme:,
        location:,
        startdate:,
      )
      # Bypass callbacks/validations to simulate a log that already holds property
      # address/UPRN data collected before the confidential address feature existed.
      log.update_columns(
        uprn: "123456789012",
        uprn_known: 1,
        uprn_confirmed: 1,
        uprn_selection: "123456789012",
        address_line1: "1 Secret Street",
        address_line2: "Flat 2",
        town_or_city: "Secretville",
        county: "Secretshire",
        postcode_full: "SW1A 1AA",
        postcode_known: 1,
        address_line1_input: "1 Secret Street",
        postcode_full_input: "SW1A1AA",
        address_line1_as_entered: "1 Secret Street",
        address_line2_as_entered: "Flat 2",
        town_or_city_as_entered: "Secretville",
        county_as_entered: "Secretshire",
        postcode_full_as_entered: "SW1A 1AA",
        la_as_entered: "E09000003",
        address_search_value_check: 1,
        la: "E09000003",
      )
      log
    end

    context "when a confidential-scheme log in 2026/27 has address data" do
      let!(:log) { create_log_with_address_data(scheme:, location:, startdate: Time.zone.local(2026, 5, 1)) }

      it "clears the address and UPRN fields" do
        task.invoke
        log.reload

        expect(log.address_line1).to be_nil
        expect(log.town_or_city).to be_nil
        expect(log.uprn).to be_nil
        expect(log.postcode_known).to be_nil
      end

      it "clears every field the task targets" do
        task.invoke
        log.reload

        cleared_fields.each do |field|
          expect(log[field]).to be_nil, "expected #{field} to be nil but was #{log[field].inspect}"
        end
      end

      it "keeps the log's status unchanged when the location's LA can be inferred" do
        task.invoke
        expect(log.reload.status).to eq("completed")
      end

      it "resolves the local authority from the scheme's location without persisting it" do
        task.invoke
        log.reload

        expect(log.la).to eq(location.location_code)
        expect(log[:la]).to be_nil
        expect(log.is_la_inferred).to be true
      end

      it "does not affect the scheme or location associations" do
        task.invoke
        log.reload

        expect(log.scheme_id).to eq(scheme.id)
        expect(log.location_id).to eq(location.id)
      end

      it "is idempotent" do
        task.invoke
        task.reenable
        expect { task.invoke }.not_to(change { log.reload.updated_at })
      end
    end

    context "when the scheme's location has no resolvable local authority" do
      let!(:log) { create_log_with_address_data(scheme:, location:, startdate: Time.zone.local(2026, 5, 1)) }

      before { location.update_columns(location_code: nil, location_admin_district: nil, is_la_inferred: false) }

      it "clears the address fields and forces the log to in_progress" do
        task.invoke
        log.reload

        expect(log.address_line1).to be_nil
        expect(log.la).to be_nil
        expect(log.status).to eq("in_progress")
      end
    end

    context "when the confidential-scheme log is outside the 2026/27 collection year" do
      let!(:log) { create_log_with_address_data(scheme:, location:, startdate: Time.zone.local(2025, 5, 1)) }

      it "does not clear the address fields" do
        task.invoke
        log.reload

        expect(log.address_line1).to eq("1 Secret Street")
        expect(log.town_or_city).to eq("Secretville")
        expect(log.uprn).to eq("123456789012")
        expect(log.postcode_known).to eq(1)
      end
    end

    context "when the log's scheme is not confidential" do
      let!(:log) { create_log_with_address_data(scheme: non_confidential_scheme, location:, startdate: Time.zone.local(2026, 5, 1)) }

      it "does not clear the address fields" do
        task.invoke
        log.reload

        expect(log.address_line1).to eq("1 Secret Street")
        expect(log.town_or_city).to eq("Secretville")
        expect(log.uprn).to eq("123456789012")
        expect(log.postcode_known).to eq(1)
      end
    end

    context "when a confidential-scheme 2026/27 log has no address data left" do
      let!(:log) do
        create(
          :lettings_log,
          :ignore_validation_errors,
          needstype: 2,
          owning_organisation:,
          managing_organisation: owning_organisation,
          scheme:,
          location:,
          startdate: Time.zone.local(2026, 5, 1),
        )
      end

      it "is not touched" do
        expect { task.invoke }.not_to(change { log.reload.updated_at })
      end
    end
  end
end