module Csv
  class MissingAddressesCsvService
    def initialize(organisation)
      @organisation = organisation
    end

    def create_missing_lettings_addresses_csv
      logs_with_missing_addresses = @organisation.managed_lettings_logs.imported.filter_by_year(2023).where(needstype: 1, address_line1: nil, town_or_city: nil, uprn_known: [0, nil]).where.not(old_form_id: nil)
      return if logs_with_missing_addresses.empty?

      generate_missing_lettings_addresses_csv(logs_with_missing_addresses)
    end

    def create_missing_sales_addresses_csv
      logs_with_missing_addresses = @organisation.sales_logs.imported.filter_by_year(2023).where(address_line1: nil, town_or_city: nil, uprn_known: [0, nil]).where.not(old_form_id: nil)
      return if logs_with_missing_addresses.empty?

      generate_missing_sales_addresses_csv(logs_with_missing_addresses)
    end

    def create_missing_lettings_town_or_city_csv
      logs_with_missing_town_or_city = @organisation.managed_lettings_logs.imported.filter_by_year(2023).where(needstype: 1, town_or_city: nil, uprn_known: [0, nil]).where.not(old_form_id: nil).where.not(address_line1: nil)
      return if logs_with_missing_town_or_city.empty?

      generate_missing_lettings_addresses_csv(logs_with_missing_town_or_city)
    end

    def create_missing_sales_town_or_city_csv
      logs_with_missing_town_or_city = @organisation.sales_logs.imported.filter_by_year(2023).where(town_or_city: nil, uprn_known: [0, nil]).where.not(old_form_id: nil).where.not(address_line1: nil)
      return if logs_with_missing_town_or_city.empty?

      generate_missing_sales_addresses_csv(logs_with_missing_town_or_city)
    end

  private

    def generate_missing_lettings_addresses_csv(logs)
      CSV.generate(headers: true) do |csv|
        csv << ["Tenancy start date", "Tenant code", "Property code", "Log owner", "Owning organisation name", "Managing organisation name", "Address line 1", "Address line 2", "Town or City", "County", "Postcode", "Local authority"]

        logs.each do |log|
          csv << [log.startdate&.to_date,
                  log.tenancycode,
                  log.propcode,
                  log.created_by&.email,
                  log.owning_organisation&.name,
                  log.managing_organisation&.name,
                  log.address_line1,
                  log.address_line2,
                  log.town_or_city,
                  log.county,
                  log.postcode_full,
                  log.la]
        end
      end
    end

    def generate_missing_sales_addresses_csv(logs)
      CSV.generate(headers: true) do |csv|
        csv << ["Sale completion date", "Purchaser code", "Log owner", "Owning organisation name", "Address line 1", "Address line 2", "Town or City", "County", "Postcode", "Local authority"]

        logs.each do |log|
          csv << [log.saledate&.to_date,
                  log.purchid,
                  log.created_by&.email,
                  log.owning_organisation&.name,
                  log.address_line1,
                  log.address_line2,
                  log.town_or_city,
                  log.county,
                  log.postcode_full,
                  log.la]
        end
      end
    end
  end
end