/**
 * Converts the processed CAR_BODY policy returned by the ESG/Fanavaran lookup
 * into the same mapped contract used by the existing car-body inquiry flow.
 * The original response is deliberately kept separately as `raw` by the
 * caller, so newly exposed provider fields are never discarded.
 */
export function mapEsgCarBodyPolicyToInquiry(
  response: Record<string, any>,
): Record<string, unknown> {
  const policy = response.policy ?? {};
  const customer = response.customer ?? {};
  const vehicle = response.vehicle ?? {};
  const vehicleKind = vehicle.vehicleKind ?? {};
  const usage = vehicle.used ?? {};
  const plaque = vehicle.plaque ?? {};

  const ownerName =
    [customer.Name, customer.LastName]
      .filter((value) => typeof value === "string" && value.trim())
      .join(" ") || null;

  return {
    policyNumber: policy.CINumber ?? policy.PolicyNo ?? null,
    policyId: response.policyId ?? policy.PolicyId ?? null,
    contractId: policy.ContractId ?? null,
    insuranceLine: response.insuranceLine ?? "CAR_BODY",
    insuranceLineId: response.insuranceLineId ?? 4,

    // Provider responses do not currently include an insurer company identity.
    companyId: policy.CompanyId ?? null,
    CompanyCode: policy.CompanyId ?? "8",
    CompanyName: policy.CompanyName ?? "بیمه پارسیان",

    // The lookup's customer is the policyholder/owner, not the insurer.
    insurerName: null,
    InsuranceFullName: null,
    insurerNationalCode: null,
    ownerNationalCode: customer.NationalCode ?? null,
    ownerName,
    customerName: customer.Name ?? null,
    customerLastName: customer.LastName ?? null,
    customerFatherName: customer.FatherName ?? null,
    customerMobile: customer.Mobile ?? null,
    customerAddress: customer.Address ?? null,
    customerPostalCode: customer.PostalCode ?? null,

    motorNumber: vehicle.MotorNo ?? null,
    EngineNumberField: vehicle.MotorNo ?? null,
    chassisNumber: vehicle.ChassisNo ?? null,
    ChassisNumberField: vehicle.ChassisNo ?? null,
    vin: vehicle.VIN ?? vehicle.ChassisNo ?? null,
    VinNumberField: vehicle.VIN ?? vehicle.ChassisNo ?? null,
    vehicleGroupTitle: vehicleKind.VehicleCategoryCaption ?? null,
    vehicleSystemTitle: vehicleKind.VehicleSystemCaption ?? null,
    vehicleKind: vehicleKind.Caption ?? null,
    MapTypNam: vehicleKind.Caption ?? vehicleKind.VehicleSystemCaption ?? null,
    builtYear: vehicle.BuiltYear ?? null,
    cylinderCount: vehicleKind.CylinderCount ?? null,
    passengerCount: vehicleKind.PassengerCount ?? null,
    usage: usage.Caption ?? null,

    IssueDate: policy.PolicyIssuDate ?? policy.IssuDate ?? null,
    StartDate: policy.BeginDate ?? null,
    EndDate: policy.EndDate ?? null,
    vehicleValue: policy.VehicleValue ?? null,
    totalPremium: policy.TotalPremium ?? null,
    noLossYearsCount:
      policy.YearsCountWithoutLoss ??
      policy.AdditionalCovYearsCountWithoutLoss ??
      null,
    lossDocuments: [],
    hasEndorsement: Number(policy.EndoNo ?? 0) > 0,

    platePartOne: plaque.leftTwoDigits ?? vehicle.PlaqueLeftNo ?? null,
    plateLetterTitle: plaque.serialLetter ?? null,
    platePartThree: plaque.threeDigits ?? vehicle.PlaqueRightNo ?? null,
    plateSerialNumber: plaque.rightTwoDigits ?? vehicle.PlaqueSerial ?? null,
  };
}