/**
 * Notifications Schema
 *
 * Zod schemas and types for in-app notifications.
 */

import { z } from "zod";

// =============================================================================
// Enums
// =============================================================================

export const NOTIFICATION_TYPE = {
  ELIGIBILITY_ELIGIBLE: "ELIGIBILITY_ELIGIBLE",
  ELIGIBILITY_INELIGIBLE: "ELIGIBILITY_INELIGIBLE",
  VERIFICATION_VERIFIED: "VERIFICATION_VERIFIED",
  VERIFICATION_REJECTED: "VERIFICATION_REJECTED",
  ORDER_APPROVED: "ORDER_APPROVED",
  ORDER_ACTIVATED: "ORDER_ACTIVATED",
  ORDER_FAILED: "ORDER_FAILED",
  CANCELLATION_SCHEDULED: "CANCELLATION_SCHEDULED",
  CANCELLATION_COMPLETE: "CANCELLATION_COMPLETE",
  PAYMENT_METHOD_EXPIRING: "PAYMENT_METHOD_EXPIRING",
  INVOICE_DUE: "INVOICE_DUE",
  SYSTEM_ANNOUNCEMENT: "SYSTEM_ANNOUNCEMENT",
} as const;

export type NotificationTypeValue = (typeof NOTIFICATION_TYPE)[keyof typeof NOTIFICATION_TYPE];

export const NOTIFICATION_SOURCE = {
  SALESFORCE: "SALESFORCE",
  WHMCS: "WHMCS",
  PORTAL: "PORTAL",
  SYSTEM: "SYSTEM",
} as const;

export type NotificationSourceValue =
  (typeof NOTIFICATION_SOURCE)[keyof typeof NOTIFICATION_SOURCE];

// =============================================================================
// Notification Templates
// =============================================================================

export interface NotificationTemplate {
  type: NotificationTypeValue;
  title: string;
  message: string;
  actionUrl?: string;
  actionLabel?: string;
  priority: "low" | "medium" | "high";
}

export const NOTIFICATION_TEMPLATES: Record<NotificationTypeValue, NotificationTemplate> = {
  [NOTIFICATION_TYPE.ELIGIBILITY_ELIGIBLE]: {
    type: NOTIFICATION_TYPE.ELIGIBILITY_ELIGIBLE,
    title: "Good news! Internet service is available",
    message:
      "We've confirmed internet service is available at your address. You can now select a plan and complete your order.",
    actionUrl: "/account/services/internet",
    actionLabel: "View Plans",
    priority: "high",
  },
  [NOTIFICATION_TYPE.ELIGIBILITY_INELIGIBLE]: {
    type: NOTIFICATION_TYPE.ELIGIBILITY_INELIGIBLE,
    title: "Internet service not available",
    message:
      "Unfortunately, internet service is not currently available at your address. We'll notify you if this changes.",
    actionUrl: "/account/support",
    actionLabel: "Contact Support",
    priority: "high",
  },
  [NOTIFICATION_TYPE.VERIFICATION_VERIFIED]: {
    type: NOTIFICATION_TYPE.VERIFICATION_VERIFIED,
    title: "ID verification complete",
    message: "Your identity has been verified. You can now complete your order.",
    actionUrl: "/account/order",
    actionLabel: "Continue Checkout",
    priority: "high",
  },
  [NOTIFICATION_TYPE.VERIFICATION_REJECTED]: {
    type: NOTIFICATION_TYPE.VERIFICATION_REJECTED,
    title: "ID verification requires attention",
    message: "We couldn't verify your ID. Please review the feedback and resubmit.",
    actionUrl: "/account/settings/verification",
    actionLabel: "Resubmit",
    priority: "high",
  },
  [NOTIFICATION_TYPE.ORDER_APPROVED]: {
    type: NOTIFICATION_TYPE.ORDER_APPROVED,
    title: "Order approved",
    message: "Your order has been approved and is being processed.",
    actionUrl: "/account/orders",
    actionLabel: "View Order",
    priority: "medium",
  },
  [NOTIFICATION_TYPE.ORDER_ACTIVATED]: {
    type: NOTIFICATION_TYPE.ORDER_ACTIVATED,
    title: "Service activated",
    message: "Your service is now active and ready to use.",
    actionUrl: "/account/services",
    actionLabel: "View Service",
    priority: "high",
  },
  [NOTIFICATION_TYPE.ORDER_FAILED]: {
    type: NOTIFICATION_TYPE.ORDER_FAILED,
    title: "Order requires attention",
    message: "There was an issue processing your order. Please contact support.",
    actionUrl: "/account/support",
    actionLabel: "Contact Support",
    priority: "high",
  },
  [NOTIFICATION_TYPE.CANCELLATION_SCHEDULED]: {
    type: NOTIFICATION_TYPE.CANCELLATION_SCHEDULED,
    title: "Cancellation scheduled",
    message: "Your cancellation request has been received and scheduled.",
    actionUrl: "/account/services",
    actionLabel: "View Details",
    priority: "medium",
  },
  [NOTIFICATION_TYPE.CANCELLATION_COMPLETE]: {
    type: NOTIFICATION_TYPE.CANCELLATION_COMPLETE,
    title: "Service cancelled",
    message: "Your service has been successfully cancelled.",
    actionUrl: "/account/services",
    actionLabel: "View Details",
    priority: "medium",
  },
  [NOTIFICATION_TYPE.PAYMENT_METHOD_EXPIRING]: {
    type: NOTIFICATION_TYPE.PAYMENT_METHOD_EXPIRING,
    title: "Payment method expiring soon",
    message:
      "Your payment method is expiring soon. Please update it to avoid service interruption.",
    actionUrl: "/account/billing/payments",
    actionLabel: "Update Payment",
    priority: "high",
  },
  [NOTIFICATION_TYPE.INVOICE_DUE]: {
    type: NOTIFICATION_TYPE.INVOICE_DUE,
    title: "Invoice due",
    message: "You have an invoice due. Please make a payment to keep your service active.",
    actionUrl: "/account/billing/invoices",
    actionLabel: "Pay Now",
    priority: "high",
  },
  [NOTIFICATION_TYPE.SYSTEM_ANNOUNCEMENT]: {
    type: NOTIFICATION_TYPE.SYSTEM_ANNOUNCEMENT,
    title: "System announcement",
    message: "Important information about your service.",
    priority: "low",
  },
};

/**
 * Get notification template by type with optional overrides
 */
export function getNotificationTemplate(
  type: NotificationTypeValue,
  overrides?: Partial<NotificationTemplate>
): NotificationTemplate {
  const template = NOTIFICATION_TEMPLATES[type];
  if (!template) {
    throw new Error(`Unknown notification type: ${type}`);
  }
  return { ...template, ...overrides };
}

// =============================================================================
// Schemas
// =============================================================================

export const notificationSchema = z.object({
  id: z.string().uuid(),
  userId: z.string().uuid(),
  type: z.nativeEnum(NOTIFICATION_TYPE),
  title: z.string(),
  message: z.string().nullable(),
  actionUrl: z.string().nullable(),
  actionLabel: z.string().nullable(),
  source: z.nativeEnum(NOTIFICATION_SOURCE),
  sourceId: z.string().nullable(),
  read: z.boolean(),
  readAt: z.string().datetime().nullable(),
  dismissed: z.boolean(),
  createdAt: z.string().datetime(),
  expiresAt: z.string().datetime(),
});

export type Notification = z.infer<typeof notificationSchema>;

export const createNotificationRequestSchema = z.object({
  userId: z.string().uuid(),
  type: z.nativeEnum(NOTIFICATION_TYPE),
  title: z.string().optional(),
  message: z.string().optional(),
  actionUrl: z.string().optional(),
  actionLabel: z.string().optional(),
  source: z.nativeEnum(NOTIFICATION_SOURCE).optional(),
  sourceId: z.string().optional(),
});

export type CreateNotificationRequest = z.infer<typeof createNotificationRequestSchema>;

export const notificationListResponseSchema = z.object({
  notifications: z.array(notificationSchema),
  unreadCount: z.number(),
  total: z.number(),
});

export type NotificationListResponse = z.infer<typeof notificationListResponseSchema>;

export const notificationUnreadCountResponseSchema = z.object({
  count: z.number(),
});

export type NotificationUnreadCountResponse = z.infer<typeof notificationUnreadCountResponseSchema>;

/**
 * Schema for notification query parameters
 */
export const notificationQuerySchema = z.object({
  limit: z.coerce.number().int().min(1).max(100).optional().default(20),
  offset: z.coerce.number().int().nonnegative().optional().default(0),
  includeRead: z.coerce.boolean().optional().default(true),
});

export type NotificationQuery = z.infer<typeof notificationQuerySchema>;

// =============================================================================
// Route Param Schemas (BFF)
// =============================================================================

export const notificationIdParamSchema = z.object({
  id: z.string().uuid(),
});
export type NotificationIdParam = z.infer<typeof notificationIdParamSchema>;