import customers from "@86d-app/customers";

const module = customers({
  autoCreateOnSignup: true,
});

interface CustomerController {
  /** Look up a customer by their ID */
  getById(id: string): Promise<Customer | null>;

  /** Look up a customer by their email address */
  getByEmail(email: string): Promise<Customer | null>;

  /** Create a new customer record */
  create(params: {
    id?: string;
    email: string;
    firstName: string;
    lastName: string;
    phone?: string;
    dateOfBirth?: Date;
    metadata?: Record<string, unknown>;
  }): Promise<Customer>;

  /** Update an existing customer's profile fields */
  update(
    id: string,
    params: {
      firstName?: string;
      lastName?: string;
      phone?: string | null;
      dateOfBirth?: Date | null;
      metadata?: Record<string, unknown>;
    },
  ): Promise<Customer | null>;

  /** Hard-delete a customer */
  delete(id: string): Promise<void>;

  /** List customers with optional search and pagination */
  list(params: {
    limit?: number;
    offset?: number;
    search?: string;
  }): Promise<{ customers: Customer[]; total: number }>;

  /** Get all saved addresses for a customer */
  listAddresses(customerId: string): Promise<CustomerAddress[]>;

  /** Get a single address by ID */
  getAddress(id: string): Promise<CustomerAddress | null>;

  /** Add an address to a customer's account */
  createAddress(params: {
    customerId: string;
    type?: "billing" | "shipping";
    firstName: string;
    lastName: string;
    company?: string;
    line1: string;
    line2?: string;
    city: string;
    state: string;
    postalCode: string;
    country: string;           // ISO 3166-1 alpha-2 (e.g. "US")
    phone?: string;
    isDefault?: boolean;
  }): Promise<CustomerAddress>;

  /** Update fields on an existing address */
  updateAddress(
    id: string,
    params: {
      type?: "billing" | "shipping";
      firstName?: string;
      lastName?: string;
      company?: string | null;
      line1?: string;
      line2?: string | null;
      city?: string;
      state?: string;
      postalCode?: string;
      country?: string;
      phone?: string | null;
      isDefault?: boolean;
    },
  ): Promise<CustomerAddress | null>;

  /** Remove an address */
  deleteAddress(id: string): Promise<void>;

  /**
   * Mark an address as default for its type.
   * Automatically clears the previous default of the same type.
   */
  setDefaultAddress(
    customerId: string,
    addressId: string,
  ): Promise<CustomerAddress | null>;
}

interface Customer {
  id: string;
  email: string;
  firstName: string;
  lastName: string;
  phone?: string;
  dateOfBirth?: Date;
  metadata?: Record<string, unknown>;
  createdAt: Date;
  updatedAt: Date;
}

interface CustomerAddress {
  id: string;
  customerId: string;
  type: "billing" | "shipping";
  firstName: string;
  lastName: string;
  company?: string;
  line1: string;
  line2?: string;
  city: string;
  state: string;
  postalCode: string;
  country: string;             // ISO 3166-1 alpha-2
  phone?: string;
  isDefault: boolean;
  createdAt: Date;
  updatedAt: Date;
}