/**
 * Checkout Domain - Schemas
 *
 * Zod validation schemas for unified checkout flow.
 * Supports both authenticated and guest checkout.
 */

import { z } from "zod";
import {
  emailSchema,
  passwordSchema,
  nameSchema,
  phoneSchema,
  genderEnum,
} from "../common/schema.js";
import { addressFormSchema } from "../customer/schema.js";

// ============================================================================
// ISO Date Schema
// ============================================================================

const isoDateOnlySchema = z
  .string()
  .regex(/^\d{4}-\d{2}-\d{2}$/, "Enter a valid date (YYYY-MM-DD)")
  .refine(value => !Number.isNaN(Date.parse(value)), "Enter a valid date (YYYY-MM-DD)");

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

export const orderTypeSchema = z.enum(["INTERNET", "SIM", "VPN"]);

// ============================================================================
// 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([]),
  }),
});

// ============================================================================
// Guest Info Schema
// ============================================================================

export const guestInfoSchema = z.object({
  email: emailSchema,
  firstName: nameSchema,
  lastName: nameSchema,
  phone: phoneSchema,
  phoneCountryCode: z.string().min(1, "Phone country code is required"),
  password: passwordSchema,
  dateOfBirth: isoDateOnlySchema.optional(),
  gender: genderEnum.optional(),
});

// ============================================================================
// Checkout Register Request Schema
// ============================================================================

export const checkoutRegisterRequestSchema = z.object({
  email: emailSchema,
  firstName: nameSchema,
  lastName: nameSchema,
  phone: phoneSchema,
  phoneCountryCode: z.string().min(1, "Phone country code is required"),
  password: passwordSchema,
  address: addressFormSchema,
  dateOfBirth: isoDateOnlySchema.optional(),
  gender: genderEnum.optional(),
  acceptTerms: z.literal(true, { message: "You must accept the terms and conditions" }),
  marketingConsent: z.boolean().optional(),
});

// ============================================================================
// Checkout Register Response Schema
// ============================================================================

export const checkoutRegisterResponseSchema = z.object({
  success: z.boolean(),
  user: z.object({
    id: z.string(),
    email: z.string(),
    firstname: z.string(),
    lastname: z.string(),
  }),
  session: z.object({
    expiresAt: z.string(),
    refreshExpiresAt: z.string(),
  }),
  sfAccountNumber: z.string().optional(),
});

// ============================================================================
// Checkout Step Schema
// ============================================================================

export const checkoutStepSchema = z.enum([
  "account",
  "address",
  "availability",
  "payment",
  "review",
]);

// ============================================================================
// Checkout State Schema (for Zustand store)
// ============================================================================

export const checkoutStateSchema = z.object({
  // Cart data
  cartItem: cartItemSchema.nullable(),

  // Guest info (pre-registration)
  guestInfo: guestInfoSchema.partial().nullable(),

  // Address
  address: addressFormSchema.nullable(),

  // Registration state
  registrationComplete: z.boolean(),
  userId: z.string().nullable(),

  // Payment state
  paymentMethodVerified: z.boolean(),

  // Checkout step
  currentStep: checkoutStepSchema,
});

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

export type OrderType = z.infer<typeof orderTypeSchema>;
export type PriceBreakdownItem = z.infer<typeof priceBreakdownItemSchema>;
export type CartItem = z.infer<typeof cartItemSchema>;
export type GuestInfo = z.infer<typeof guestInfoSchema>;
export type CheckoutRegisterRequest = z.infer<typeof checkoutRegisterRequestSchema>;
export type CheckoutRegisterResponse = z.infer<typeof checkoutRegisterResponseSchema>;
export type CheckoutStep = z.infer<typeof checkoutStepSchema>;
export type CheckoutState = z.infer<typeof checkoutStateSchema>;