Assist_Design/packages/domain/checkout/schema.ts

/**
 * Checkout Domain - Schemas
 *
 * Zod validation schemas for checkout flow.
 * Supports authenticated checkout.
 */

import { z } from "zod";

// ============================================================================
// Order Type Schema
// ============================================================================

/**
 * Checkout order types - uses PascalCase to match Salesforce/BFF contracts
 * @see packages/domain/orders/contract.ts ORDER_TYPE for canonical values
 */
export const checkoutOrderTypeSchema = z.enum(["Internet", "SIM", "VPN"]);

/**
 * @deprecated Use checkoutOrderTypeSchema instead. This alias exists for backwards compatibility.
 */
export const orderTypeSchema = checkoutOrderTypeSchema;

// ============================================================================
// Order Type Helpers
// ============================================================================

/**
 * Convert legacy uppercase order type to PascalCase
 * Used for migrating old localStorage data
 */
export function normalizeOrderType(value: unknown): z.infer<typeof checkoutOrderTypeSchema> | null {
  if (typeof value !== "string") return null;

  const upper = value.trim().toUpperCase();
  switch (upper) {
    case "INTERNET":
      return "Internet";
    case "SIM":
      return "SIM";
    case "VPN":
      return "VPN";
    default:
      return null;
  }
}

// ============================================================================
// Price Breakdown Schema
// ============================================================================

export const priceBreakdownItemSchema = z.object({
  label: z.string(),
  sku: z.string().optional(),
  monthlyPrice: z.number().optional(),
  oneTimePrice: z.number().optional(),
  quantity: z.number().optional().default(1),
});

// ============================================================================
// Cart Item Schema
// ============================================================================

export const cartItemSchema = z.object({
  orderType: orderTypeSchema,
  planSku: z.string().min(1, "Plan SKU is required"),
  planName: z.string().min(1, "Plan name is required"),
  addonSkus: z.array(z.string()).default([]),
  configuration: z.record(z.string(), z.unknown()).default({}),
  pricing: z.object({
    monthlyTotal: z.number().nonnegative(),
    oneTimeTotal: z.number().nonnegative(),
    breakdown: z.array(priceBreakdownItemSchema).default([]),
  }),
});

// ============================================================================
// Inferred Types
// ============================================================================

export type OrderType = z.infer<typeof orderTypeSchema>;
export type PriceBreakdownItem = z.infer<typeof priceBreakdownItemSchema>;
export type CartItem = z.infer<typeof cartItemSchema>;