/**
 * Customer Management Hooks
 */

import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
import apiClient from '../api/client';
import { Customer } from '../types';

interface CustomerFilters {
  status?: 'Active' | 'Inactive' | 'Blocked';
  search?: string;
}

/**
 * Hook to fetch customers with optional filters
 */
export const useCustomers = (filters?: CustomerFilters) => {
  return useQuery<Customer[]>({
    queryKey: ['customers', filters],
    queryFn: async () => {
      const params = new URLSearchParams();
      if (filters?.status) params.append('status', filters.status);
      if (filters?.search) params.append('search', filters.search);

      const { data } = await apiClient.get(`/api/customers/?${params}`);

      // Transform backend format to frontend format
      return data.map((c: any) => ({
        id: String(c.id),
        name: c.name || c.user?.name || '',
        email: c.email || c.user?.email || '',
        phone: c.phone || '',
        city: c.city,
        state: c.state,
        zip: c.zip,
        totalSpend: parseFloat(c.total_spend || 0),
        lastVisit: c.last_visit ? new Date(c.last_visit) : null,
        status: c.status,
        avatarUrl: c.avatar_url,
        tags: c.tags || [],
        userId: String(c.user_id || c.user),
        paymentMethods: [], // Will be populated when payment feature is implemented
        user_data: c.user_data, // Include user_data for masquerading
      }));
    },
  });
};

/**
 * Hook to create a customer
 */
export const useCreateCustomer = () => {
  const queryClient = useQueryClient();

  return useMutation({
    mutationFn: async (customerData: Partial<Customer>) => {
      const backendData = {
        user: customerData.userId ? parseInt(customerData.userId) : undefined,
        phone: customerData.phone,
        city: customerData.city,
        state: customerData.state,
        zip: customerData.zip,
        status: customerData.status,
        avatar_url: customerData.avatarUrl,
        tags: customerData.tags,
      };

      const { data } = await apiClient.post('/api/customers/', backendData);
      return data;
    },
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ['customers'] });
    },
  });
};

/**
 * Hook to update a customer
 */
export const useUpdateCustomer = () => {
  const queryClient = useQueryClient();

  return useMutation({
    mutationFn: async ({ id, updates }: { id: string; updates: Partial<Customer> }) => {
      const backendData = {
        phone: updates.phone,
        city: updates.city,
        state: updates.state,
        zip: updates.zip,
        status: updates.status,
        avatar_url: updates.avatarUrl,
        tags: updates.tags,
      };

      const { data } = await apiClient.patch(`/api/customers/${id}/`, backendData);
      return data;
    },
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ['customers'] });
    },
  });
};

/**
 * Hook to delete a customer
 */
export const useDeleteCustomer = () => {
  const queryClient = useQueryClient();

  return useMutation({
    mutationFn: async (id: string) => {
      await apiClient.delete(`/api/customers/${id}/`);
    },
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ['customers'] });
    },
  });
};