// src/api/services/NotificationService.ts
import { apiClient } from '../base/apiClient';
import {
  ApiResponse,
  NotificationSettings,
} from '../types/api';

export interface NotificationCreate {
  type: 'email' | 'whatsapp' | 'push';
  recipient_email?: string;
  recipient_phone?: string;
  recipient_push_token?: string;
  subject?: string;
  message: string;
  template_id?: string;
  template_data?: Record<string, any>;
  scheduled_for?: string;
  broadcast?: boolean;
  priority?: 'low' | 'normal' | 'high';
}

export interface NotificationResponse {
  id: string;
  type: string;
  recipient_email?: string;
  recipient_phone?: string;
  subject?: string;
  message: string;
  status: 'pending' | 'sent' | 'delivered' | 'failed';
  created_at: string;
  sent_at?: string;
  delivered_at?: string;
  error_message?: string;
}

export interface NotificationHistory {
  id: string;
  type: string;
  recipient: string;
  subject?: string;
  status: string;
  created_at: string;
  sent_at?: string;
  delivered_at?: string;
  opened_at?: string;
  clicked_at?: string;
  error_message?: string;
}

export interface NotificationTemplate {
  id: string;
  name: string;
  description: string;
  type: 'email' | 'whatsapp' | 'push';
  subject?: string;
  content: string;
  variables: string[];
  is_system: boolean;
  is_active: boolean;
  created_at: string;
}

export interface NotificationStats {
  total_sent: number;
  total_delivered: number;
  total_failed: number;
  delivery_rate: number;
  open_rate: number;
  click_rate: number;
  by_type: {
    email: { sent: number; delivered: number; opened: number; clicked: number };
    whatsapp: { sent: number; delivered: number; read: number };
    push: { sent: number; delivered: number; opened: number };
  };
}

export interface BulkNotificationRequest {
  type: 'email' | 'whatsapp' | 'push';
  recipients: {
    email?: string;
    phone?: string;
    push_token?: string;
    template_data?: Record<string, any>;
  }[];
  template_id?: string;
  subject?: string;
  message?: string;
  scheduled_for?: string;
  batch_name?: string;
}

export interface BulkNotificationStatus {
  id: string;
  batch_name?: string;
  total_recipients: number;
  sent: number;
  delivered: number;
  failed: number;
  status: 'queued' | 'processing' | 'completed' | 'failed';
  created_at: string;
  completed_at?: string;
}

export class NotificationService {
  /**
   * Send single notification
   */
  async sendNotification(notification: NotificationCreate): Promise<NotificationResponse> {
    const response = await apiClient.post<ApiResponse<NotificationResponse>>(
      '/notifications/send',
      notification
    );
    return response.data!;
  }

  /**
   * Send bulk notifications
   */
  async sendBulkNotifications(request: BulkNotificationRequest): Promise<BulkNotificationStatus> {
    const response = await apiClient.post<ApiResponse<BulkNotificationStatus>>(
      '/notifications/bulk',
      request
    );
    return response.data!;
  }

  /**
   * Get notification history
   */
  async getNotificationHistory(params?: {
    type?: string;
    status?: string;
    startDate?: string;
    endDate?: string;
    page?: number;
    limit?: number;
  }): Promise<{
    notifications: NotificationHistory[];
    total: number;
    page: number;
    pages: number;
  }> {
    const response = await apiClient.get<ApiResponse<any>>('/notifications/history', { params });
    return response.data!;
  }

  /**
   * Get notification by ID
   */
  async getNotification(notificationId: string): Promise<NotificationResponse> {
    const response = await apiClient.get<ApiResponse<NotificationResponse>>(
      `/notifications/${notificationId}`
    );
    return response.data!;
  }

  /**
   * Retry failed notification
   */
  async retryNotification(notificationId: string): Promise<NotificationResponse> {
    const response = await apiClient.post<ApiResponse<NotificationResponse>>(
      `/notifications/${notificationId}/retry`
    );
    return response.data!;
  }

  /**
   * Cancel scheduled notification
   */
  async cancelNotification(notificationId: string): Promise<void> {
    await apiClient.post(`/notifications/${notificationId}/cancel`);
  }

  /**
   * Get notification statistics
   */
  async getNotificationStats(params?: {
    startDate?: string;
    endDate?: string;
    type?: string;
  }): Promise<NotificationStats> {
    const response = await apiClient.get<ApiResponse<NotificationStats>>(
      '/notifications/stats',
      { params }
    );
    return response.data!;
  }

  /**
   * Get bulk notification status
   */
  async getBulkStatus(batchId: string): Promise<BulkNotificationStatus> {
    const response = await apiClient.get<ApiResponse<BulkNotificationStatus>>(
      `/notifications/bulk/${batchId}/status`
    );
    return response.data!;
  }

  /**
   * Get notification templates
   */
  async getTemplates(params?: {
    type?: string;
    active?: boolean;
    page?: number;
    limit?: number;
  }): Promise<{
    templates: NotificationTemplate[];
    total: number;
    page: number;
    pages: number;
  }> {
    const response = await apiClient.get<ApiResponse<any>>('/notifications/templates', { params });
    return response.data!;
  }

  /**
   * Get template by ID
   */
  async getTemplate(templateId: string): Promise<NotificationTemplate> {
    const response = await apiClient.get<ApiResponse<NotificationTemplate>>(
      `/notifications/templates/${templateId}`
    );
    return response.data!;
  }

  /**
   * Create notification template
   */
  async createTemplate(template: {
    name: string;
    description: string;
    type: 'email' | 'whatsapp' | 'push';
    subject?: string;
    content: string;
    variables?: string[];
  }): Promise<NotificationTemplate> {
    const response = await apiClient.post<ApiResponse<NotificationTemplate>>(
      '/notifications/templates',
      template
    );
    return response.data!;
  }

  /**
   * Update notification template
   */
  async updateTemplate(
    templateId: string,
    updates: Partial<NotificationTemplate>
  ): Promise<NotificationTemplate> {
    const response = await apiClient.put<ApiResponse<NotificationTemplate>>(
      `/notifications/templates/${templateId}`,
      updates
    );
    return response.data!;
  }

  /**
   * Delete notification template
   */
  async deleteTemplate(templateId: string): Promise<void> {
    await apiClient.delete(`/notifications/templates/${templateId}`);
  }

  /**
   * Get user notification preferences
   */
  async getPreferences(): Promise<NotificationSettings> {
    const response = await apiClient.get<ApiResponse<NotificationSettings>>(
      '/notifications/preferences'
    );
    return response.data!;
  }

  /**
   * Update user notification preferences
   */
  async updatePreferences(preferences: Partial<NotificationSettings>): Promise<NotificationSettings> {
    const response = await apiClient.put<ApiResponse<NotificationSettings>>(
      '/notifications/preferences',
      preferences
    );
    return response.data!;
  }

  /**
   * Test notification delivery
   */
  async testNotification(type: 'email' | 'whatsapp' | 'push', recipient: string): Promise<{
    success: boolean;
    message: string;
    delivery_time_ms?: number;
  }> {
    const response = await apiClient.post<ApiResponse<any>>(
      '/notifications/test',
      { type, recipient }
    );
    return response.data!;
  }

  /**
   * Get delivery webhooks
   */
  async getWebhooks(params?: {
    type?: string;
    status?: string;
    page?: number;
    limit?: number;
  }): Promise<{
    webhooks: {
      id: string;
      notification_id: string;
      event_type: string;
      status: string;
      payload: any;
      received_at: string;
    }[];
    total: number;
    page: number;
    pages: number;
  }> {
    const response = await apiClient.get<ApiResponse<any>>('/notifications/webhooks', { params });
    return response.data!;
  }

  /**
   * Subscribe to notification events
   */
  async subscribeToEvents(events: string[], webhookUrl: string): Promise<{
    subscription_id: string;
    events: string[];
    webhook_url: string;
    created_at: string;
  }> {
    const response = await apiClient.post<ApiResponse<any>>('/notifications/subscribe', {
      events,
      webhook_url: webhookUrl,
    });
    return response.data!;
  }

  /**
   * Unsubscribe from notification events
   */
  async unsubscribeFromEvents(subscriptionId: string): Promise<void> {
    await apiClient.delete(`/notifications/subscribe/${subscriptionId}`);
  }
}

export const notificationService = new NotificationService();