// Customers domain — contract schema re-exports + customer form schema.
import { z } from 'zod';
import { createCustomerRequestSchema } from '@proposal-system/api-contracts/schemas';
import type { CreateCustomerRequest, UpdateCustomerRequest } from './types';

export {
  customerSchema,
  createCustomerRequestSchema,
  updateCustomerRequestSchema,
} from '@proposal-system/api-contracts/schemas';

/** Simple email format check (client-side only) — mirrors CustomerManagementPage. */
const EMAIL_RE = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;

/**
 * Customer create/edit form. Derived from createCustomerRequestSchema — the
 * form edits a single primary address string (the wire type takes
 * addresses: string[]); toCustomerRequest() maps to the request shape.
 */
export const customerFormSchema = createCustomerRequestSchema
  .pick({ name: true })
  .extend({
    name: z.string().trim().min(1, 'Name is required'),
    address: z.string().trim().min(1, 'Address is required'),
    contactEmail: z
      .string()
      .refine((v) => v.trim() === '' || EMAIL_RE.test(v.trim()), {
        message: 'Enter a valid email address',
      }),
  });

export type CustomerFormValues = z.infer<typeof customerFormSchema>;

/**
 * Map validated form values to the create/update request. The form edits the
 * primary address; any additional existing addresses are preserved.
 * contactEmail is always sent: the API clears the stored email on empty
 * string (CustomerService normalizes '' → null), so omitting the key when the
 * admin blanks the field would make the email impossible to clear.
 */
export function toCustomerRequest(
  values: CustomerFormValues,
  existingAddresses: string[] = []
): CreateCustomerRequest & UpdateCustomerRequest {
  return {
    name: values.name.trim(),
    addresses: [values.address.trim(), ...existingAddresses.slice(1)],
    contactEmail: values.contactEmail.trim(),
  };
}