/**
 * WHMCS Provider - Mapper
 * 
 * Maps WHMCS API responses to domain types.
 * Minimal transformation - validates and normalizes only address structure.
 */

import { z } from "zod";

import type { WhmcsClient, Address } from "../../schema";
import { whmcsClientSchema, addressSchema } from "../../schema";
import {
  whmcsClientSchema as whmcsRawClientSchema,
  whmcsClientResponseSchema,
  type WhmcsClient as WhmcsRawClient,
  type WhmcsClientResponse,
} from "./raw.types";

/**
 * Parse and validate WHMCS client response
 */
export const parseWhmcsClientResponse = (raw: unknown): WhmcsClientResponse =>
  whmcsClientResponseSchema.parse(raw);

/**
 * Transform WHMCS client response to domain WhmcsClient
 */
export function transformWhmcsClientResponse(response: unknown): WhmcsClient {
  const parsed = parseWhmcsClientResponse(response);
  return transformWhmcsClient(parsed.client);
}

/**
 * Transform raw WHMCS client to domain WhmcsClient
 * 
 * Keeps raw WHMCS field names, only normalizes:
 * - Address structure to domain Address type
 * - Type coercions (strings to numbers/booleans)
 */
export function transformWhmcsClient(raw: WhmcsRawClient): WhmcsClient {
  return whmcsClientSchema.parse({
    ...raw,
    // Only normalize address to our domain structure
    address: normalizeAddress(raw),
  });
}

/**
 * Normalize WHMCS address fields to domain Address structure
 */
function normalizeAddress(client: WhmcsRawClient): Address | undefined {
  const address = addressSchema.parse({
    address1: client.address1 ?? null,
    address2: client.address2 ?? null,
    city: client.city ?? null,
    state: client.fullstate ?? client.state ?? null,
    postcode: client.postcode ?? null,
    country: client.country ?? null,
    countryCode: client.countrycode ?? null,
    phoneNumber: client.phonenumberformatted ?? client.phonenumber ?? null,
    phoneCountryCode: client.phonecc ?? null,
  });

  const hasValues = Object.values(address).some(v => v !== undefined && v !== null && v !== "");
  return hasValues ? address : undefined;
}

/**
 * Transform WHMCS client address to domain Address
 */
export const transformWhmcsClientAddress = (raw: unknown): Address | undefined => {
  const client = whmcsRawClientSchema.parse(raw);
  return normalizeAddress(client);
};

/**
 * Prepare address update for WHMCS API
 * Converts domain Address to WHMCS field names
 */
export const prepareWhmcsClientAddressUpdate = (
  address: Partial<Address>
): Record<string, unknown> => {
  const update: Record<string, unknown> = {};
  if (address.address1 !== undefined) update.address1 = address.address1 ?? "";
  if (address.address2 !== undefined) update.address2 = address.address2 ?? "";
  if (address.city !== undefined) update.city = address.city ?? "";
  if (address.state !== undefined) update.state = address.state ?? "";
  if (address.postcode !== undefined) update.postcode = address.postcode ?? "";
  if (address.country !== undefined) update.country = address.country ?? "";
  if (address.countryCode !== undefined) update.countrycode = address.countryCode ?? "";
  if (address.phoneNumber !== undefined) update.phonenumber = address.phoneNumber ?? "";
  if (address.phoneCountryCode !== undefined) update.phonecc = address.phoneCountryCode ?? "";
  return update;
};