// frontend/src/api/hooks/useNotification.ts
/**
 * Notification Operations Hooks
 */

import { useState, useCallback } from 'react';
import { notificationService } from '../services';
import type {
  NotificationCreate,
  NotificationResponse,
  NotificationTemplate,
  NotificationStats,
  BulkNotificationRequest,
} from '../types';

export const useNotification = () => {
  const [notifications, setNotifications] = useState<NotificationResponse[]>([]);
  const [templates, setTemplates] = useState<NotificationTemplate[]>([]);
  const [stats, setStats] = useState<NotificationStats | null>(null);
  const [isLoading, setIsLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);

  const sendNotification = useCallback(async (
    tenantId: string,
    notification: NotificationCreate
  ): Promise<NotificationResponse> => {
    try {
      setIsLoading(true);
      setError(null);

      const sentNotification = await notificationService.sendNotification(tenantId, notification);
      setNotifications(prev => [sentNotification, ...prev]);
      
      return sentNotification;
    } catch (error) {
      const message = error instanceof Error ? error.message : 'Failed to send notification';
      setError(message);
      throw error;
    } finally {
      setIsLoading(false);
    }
  }, []);

  const sendBulkNotifications = useCallback(async (
    tenantId: string,
    request: BulkNotificationRequest
  ): Promise<void> => {
    try {
      setIsLoading(true);
      setError(null);

      await notificationService.sendBulkNotifications(tenantId, request);
    } catch (error) {
      const message = error instanceof Error ? error.message : 'Failed to send bulk notifications';
      setError(message);
      throw error;
    } finally {
      setIsLoading(false);
    }
  }, []);

  const getNotifications = useCallback(async (tenantId: string): Promise<NotificationResponse[]> => {
    try {
      setIsLoading(true);
      setError(null);

      const response = await notificationService.getNotifications(tenantId);
      setNotifications(response.data);
      
      return response.data;
    } catch (error) {
      const message = error instanceof Error ? error.message : 'Failed to get notifications';
      setError(message);
      throw error;
    } finally {
      setIsLoading(false);
    }
  }, []);

  const getTemplates = useCallback(async (tenantId: string): Promise<NotificationTemplate[]> => {
    try {
      setIsLoading(true);
      setError(null);

      const response = await notificationService.getTemplates(tenantId);
      setTemplates(response.data);
      
      return response.data;
    } catch (error) {
      const message = error instanceof Error ? error.message : 'Failed to get templates';
      setError(message);
      throw error;
    } finally {
      setIsLoading(false);
    }
  }, []);

  const createTemplate = useCallback(async (
    tenantId: string,
    template: Omit<NotificationTemplate, 'id' | 'tenant_id' | 'created_at' | 'updated_at'>
  ): Promise<NotificationTemplate> => {
    try {
      setIsLoading(true);
      setError(null);

      const newTemplate = await notificationService.createTemplate(tenantId, template);
      setTemplates(prev => [newTemplate, ...prev]);
      
      return newTemplate;
    } catch (error) {
      const message = error instanceof Error ? error.message : 'Failed to create template';
      setError(message);
      throw error;
    } finally {
      setIsLoading(false);
    }
  }, []);

  const getNotificationStats = useCallback(async (tenantId: string): Promise<NotificationStats> => {
    try {
      setIsLoading(true);
      setError(null);

      const notificationStats = await notificationService.getNotificationStats(tenantId);
      setStats(notificationStats);
      
      return notificationStats;
    } catch (error) {
      const message = error instanceof Error ? error.message : 'Failed to get notification stats';
      setError(message);
      throw error;
    } finally {
      setIsLoading(false);
    }
  }, []);

  return {
    notifications,
    templates,
    stats,
    isLoading,
    error,
    sendNotification,
    sendBulkNotifications,
    getNotifications,
    getTemplates,
    createTemplate,
    getNotificationStats,
    clearError: () => setError(null),
  };
};