// frontend/src/api/hooks/useSuppliers.ts
/**
 * React hooks for suppliers, purchase orders, and deliveries management
 */

import { useState, useEffect, useCallback, useMemo } from 'react';
import { 
  SuppliersService, 
  Supplier, 
  SupplierSummary,
  CreateSupplierRequest,
  UpdateSupplierRequest,
  SupplierSearchParams,
  SupplierStatistics,
  PurchaseOrder,
  CreatePurchaseOrderRequest,
  PurchaseOrderSearchParams,
  PurchaseOrderStatistics,
  Delivery,
  DeliverySearchParams,
  DeliveryPerformanceStats
} from '../services/suppliers.service';
import { useAuth } from './useAuth';

// Re-export types for component use
export type {
  Supplier,
  SupplierSummary,
  CreateSupplierRequest,
  UpdateSupplierRequest,
  SupplierSearchParams,
  SupplierStatistics,
  PurchaseOrder,
  CreatePurchaseOrderRequest,
  PurchaseOrderSearchParams,
  PurchaseOrderStatistics,
  Delivery,
  DeliverySearchParams,
  DeliveryPerformanceStats
} from '../services/suppliers.service';

const suppliersService = new SuppliersService();

// ============================================================================
// SUPPLIERS HOOK
// ============================================================================

export interface UseSuppliers {
  // Data
  suppliers: SupplierSummary[];
  supplier: Supplier | null;
  statistics: SupplierStatistics | null;
  activeSuppliers: SupplierSummary[];
  topSuppliers: SupplierSummary[];
  suppliersNeedingReview: SupplierSummary[];
  
  // States
  isLoading: boolean;
  isCreating: boolean;
  isUpdating: boolean;
  error: string | null;
  
  // Pagination
  pagination: {
    page: number;
    limit: number;
    total: number;
    totalPages: number;
  };
  
  // Actions
  loadSuppliers: (params?: SupplierSearchParams) => Promise<void>;
  loadSupplier: (supplierId: string) => Promise<void>;
  loadStatistics: () => Promise<void>;
  loadActiveSuppliers: () => Promise<void>;
  loadTopSuppliers: (limit?: number) => Promise<void>;
  loadSuppliersNeedingReview: (days?: number) => Promise<void>;
  createSupplier: (data: CreateSupplierRequest) => Promise<Supplier | null>;
  updateSupplier: (supplierId: string, data: UpdateSupplierRequest) => Promise<Supplier | null>;
  deleteSupplier: (supplierId: string) => Promise<boolean>;
  approveSupplier: (supplierId: string, action: 'approve' | 'reject', notes?: string) => Promise<Supplier | null>;
  clearError: () => void;
  refresh: () => Promise<void>;
  setPage: (page: number) => void;
}

export function useSuppliers(): UseSuppliers {
  const { user } = useAuth();
  
  // State
  const [suppliers, setSuppliers] = useState<SupplierSummary[]>([]);
  const [supplier, setSupplier] = useState<Supplier | null>(null);
  const [statistics, setStatistics] = useState<SupplierStatistics | null>(null);
  const [activeSuppliers, setActiveSuppliers] = useState<SupplierSummary[]>([]);
  const [topSuppliers, setTopSuppliers] = useState<SupplierSummary[]>([]);
  const [suppliersNeedingReview, setSuppliersNeedingReview] = useState<SupplierSummary[]>([]);
  
  const [isLoading, setIsLoading] = useState(false);
  const [isCreating, setIsCreating] = useState(false);
  const [isUpdating, setIsUpdating] = useState(false);
  const [error, setError] = useState<string | null>(null);
  
  const [currentParams, setCurrentParams] = useState<SupplierSearchParams>({});
  const [pagination, setPagination] = useState({
    page: 1,
    limit: 50,
    total: 0,
    totalPages: 0
  });
  
  // Load suppliers
  const loadSuppliers = useCallback(async (params: SupplierSearchParams = {}) => {
    if (!user?.tenant_id) return;
    
    try {
      setIsLoading(true);
      setError(null);
      
      const searchParams = {
        ...params,
        limit: pagination.limit,
        offset: ((params.offset !== undefined ? Math.floor(params.offset / pagination.limit) : pagination.page) - 1) * pagination.limit
      };
      
      setCurrentParams(params);
      
      const data = await suppliersService.getSuppliers(user.tenant_id, searchParams);
      setSuppliers(data);
      
      // Update pagination (Note: API doesn't return total count, so we estimate)
      const hasMore = data.length === pagination.limit;
      const currentPage = Math.floor((searchParams.offset || 0) / pagination.limit) + 1;
      
      setPagination(prev => ({
        ...prev,
        page: currentPage,
        total: hasMore ? (currentPage * pagination.limit) + 1 : (currentPage - 1) * pagination.limit + data.length,
        totalPages: hasMore ? currentPage + 1 : currentPage
      }));
      
    } catch (err: any) {
      setError(err.response?.data?.detail || err.message || 'Failed to load suppliers');
    } finally {
      setIsLoading(false);
    }
  }, [user?.tenant_id, pagination.limit]);
  
  // Load single supplier
  const loadSupplier = useCallback(async (supplierId: string) => {
    if (!user?.tenant_id) return;
    
    try {
      setIsLoading(true);
      setError(null);
      
      const data = await suppliersService.getSupplier(user.tenant_id, supplierId);
      setSupplier(data);
      
    } catch (err: any) {
      setError(err.response?.data?.detail || err.message || 'Failed to load supplier');
    } finally {
      setIsLoading(false);
    }
  }, [user?.tenant_id]);
  
  // Load statistics
  const loadStatistics = useCallback(async () => {
    if (!user?.tenant_id) return;
    
    try {
      const data = await suppliersService.getSupplierStatistics(user.tenant_id);
      setStatistics(data);
    } catch (err: any) {
      console.error('Failed to load supplier statistics:', err);
    }
  }, [user?.tenant_id]);
  
  // Load active suppliers
  const loadActiveSuppliers = useCallback(async () => {
    if (!user?.tenant_id) return;
    
    try {
      const data = await suppliersService.getActiveSuppliers(user.tenant_id);
      setActiveSuppliers(data);
    } catch (err: any) {
      console.error('Failed to load active suppliers:', err);
    }
  }, [user?.tenant_id]);
  
  // Load top suppliers
  const loadTopSuppliers = useCallback(async (limit: number = 10) => {
    if (!user?.tenant_id) return;
    
    try {
      const data = await suppliersService.getTopSuppliers(user.tenant_id, limit);
      setTopSuppliers(data);
    } catch (err: any) {
      console.error('Failed to load top suppliers:', err);
    }
  }, [user?.tenant_id]);
  
  // Load suppliers needing review
  const loadSuppliersNeedingReview = useCallback(async (days: number = 30) => {
    if (!user?.tenant_id) return;
    
    try {
      const data = await suppliersService.getSuppliersNeedingReview(user.tenant_id, days);
      setSuppliersNeedingReview(data);
    } catch (err: any) {
      console.error('Failed to load suppliers needing review:', err);
    }
  }, [user?.tenant_id]);
  
  // Create supplier
  const createSupplier = useCallback(async (data: CreateSupplierRequest): Promise<Supplier | null> => {
    if (!user?.tenant_id || !user?.id) return null;
    
    try {
      setIsCreating(true);
      setError(null);
      
      const supplier = await suppliersService.createSupplier(user.tenant_id, user.id, data);
      
      // Refresh suppliers list
      await loadSuppliers(currentParams);
      await loadStatistics();
      
      return supplier;
      
    } catch (err: any) {
      const errorMessage = err.response?.data?.detail || err.message || 'Failed to create supplier';
      setError(errorMessage);
      return null;
    } finally {
      setIsCreating(false);
    }
  }, [user?.tenant_id, user?.id, loadSuppliers, loadStatistics, currentParams]);
  
  // Update supplier
  const updateSupplier = useCallback(async (supplierId: string, data: UpdateSupplierRequest): Promise<Supplier | null> => {
    if (!user?.tenant_id || !user?.id) return null;
    
    try {
      setIsUpdating(true);
      setError(null);
      
      const updatedSupplier = await suppliersService.updateSupplier(user.tenant_id, user.id, supplierId, data);
      
      // Update current supplier if it's the one being edited
      if (supplier?.id === supplierId) {
        setSupplier(updatedSupplier);
      }
      
      // Refresh suppliers list
      await loadSuppliers(currentParams);
      
      return updatedSupplier;
      
    } catch (err: any) {
      const errorMessage = err.response?.data?.detail || err.message || 'Failed to update supplier';
      setError(errorMessage);
      return null;
    } finally {
      setIsUpdating(false);
    }
  }, [user?.tenant_id, user?.id, supplier?.id, loadSuppliers, currentParams]);
  
  // Delete supplier
  const deleteSupplier = useCallback(async (supplierId: string): Promise<boolean> => {
    if (!user?.tenant_id) return false;
    
    try {
      setError(null);
      
      await suppliersService.deleteSupplier(user.tenant_id, supplierId);
      
      // Clear current supplier if it's the one being deleted
      if (supplier?.id === supplierId) {
        setSupplier(null);
      }
      
      // Refresh suppliers list
      await loadSuppliers(currentParams);
      await loadStatistics();
      
      return true;
      
    } catch (err: any) {
      const errorMessage = err.response?.data?.detail || err.message || 'Failed to delete supplier';
      setError(errorMessage);
      return false;
    }
  }, [user?.tenant_id, supplier?.id, loadSuppliers, loadStatistics, currentParams]);
  
  // Approve/reject supplier
  const approveSupplier = useCallback(async (supplierId: string, action: 'approve' | 'reject', notes?: string): Promise<Supplier | null> => {
    if (!user?.tenant_id || !user?.id) return null;
    
    try {
      setError(null);
      
      const updatedSupplier = await suppliersService.approveSupplier(user.tenant_id, user.id, supplierId, action, notes);
      
      // Update current supplier if it's the one being approved/rejected
      if (supplier?.id === supplierId) {
        setSupplier(updatedSupplier);
      }
      
      // Refresh suppliers list and statistics
      await loadSuppliers(currentParams);
      await loadStatistics();
      
      return updatedSupplier;
      
    } catch (err: any) {
      const errorMessage = err.response?.data?.detail || err.message || `Failed to ${action} supplier`;
      setError(errorMessage);
      return null;
    }
  }, [user?.tenant_id, user?.id, supplier?.id, loadSuppliers, loadStatistics, currentParams]);
  
  // Clear error
  const clearError = useCallback(() => {
    setError(null);
  }, []);
  
  // Refresh current data
  const refresh = useCallback(async () => {
    await loadSuppliers(currentParams);
    if (statistics) await loadStatistics();
    if (activeSuppliers.length > 0) await loadActiveSuppliers();
    if (topSuppliers.length > 0) await loadTopSuppliers();
    if (suppliersNeedingReview.length > 0) await loadSuppliersNeedingReview();
  }, [currentParams, statistics, activeSuppliers.length, topSuppliers.length, suppliersNeedingReview.length, loadSuppliers, loadStatistics, loadActiveSuppliers, loadTopSuppliers, loadSuppliersNeedingReview]);
  
  // Set page
  const setPage = useCallback((page: number) => {
    setPagination(prev => ({ ...prev, page }));
    const offset = (page - 1) * pagination.limit;
    loadSuppliers({ ...currentParams, offset });
  }, [pagination.limit, currentParams, loadSuppliers]);
  
  return {
    // Data
    suppliers,
    supplier,
    statistics,
    activeSuppliers,
    topSuppliers,
    suppliersNeedingReview,
    
    // States
    isLoading,
    isCreating,
    isUpdating,
    error,
    
    // Pagination
    pagination,
    
    // Actions
    loadSuppliers,
    loadSupplier,
    loadStatistics,
    loadActiveSuppliers,
    loadTopSuppliers,
    loadSuppliersNeedingReview,
    createSupplier,
    updateSupplier,
    deleteSupplier,
    approveSupplier,
    clearError,
    refresh,
    setPage
  };
}

// ============================================================================
// PURCHASE ORDERS HOOK
// ============================================================================

export interface UsePurchaseOrders {
  purchaseOrders: PurchaseOrder[];
  purchaseOrder: PurchaseOrder | null;
  statistics: PurchaseOrderStatistics | null;
  ordersRequiringApproval: PurchaseOrder[];
  overdueOrders: PurchaseOrder[];
  isLoading: boolean;
  isCreating: boolean;
  error: string | null;
  pagination: {
    page: number;
    limit: number;
    total: number;
    totalPages: number;
  };
  
  loadPurchaseOrders: (params?: PurchaseOrderSearchParams) => Promise<void>;
  loadPurchaseOrder: (poId: string) => Promise<void>;
  loadStatistics: () => Promise<void>;
  loadOrdersRequiringApproval: () => Promise<void>;
  loadOverdueOrders: () => Promise<void>;
  createPurchaseOrder: (data: CreatePurchaseOrderRequest) => Promise<PurchaseOrder | null>;
  updateOrderStatus: (poId: string, status: string, notes?: string) => Promise<PurchaseOrder | null>;
  approveOrder: (poId: string, action: 'approve' | 'reject', notes?: string) => Promise<PurchaseOrder | null>;
  sendToSupplier: (poId: string, sendEmail?: boolean) => Promise<PurchaseOrder | null>;
  cancelOrder: (poId: string, reason: string) => Promise<PurchaseOrder | null>;
  clearError: () => void;
  refresh: () => Promise<void>;
  setPage: (page: number) => void;
}

export function usePurchaseOrders(): UsePurchaseOrders {
  const { user } = useAuth();
  
  // State
  const [purchaseOrders, setPurchaseOrders] = useState<PurchaseOrder[]>([]);
  const [purchaseOrder, setPurchaseOrder] = useState<PurchaseOrder | null>(null);
  const [statistics, setStatistics] = useState<PurchaseOrderStatistics | null>(null);
  const [ordersRequiringApproval, setOrdersRequiringApproval] = useState<PurchaseOrder[]>([]);
  const [overdueOrders, setOverdueOrders] = useState<PurchaseOrder[]>([]);
  
  const [isLoading, setIsLoading] = useState(false);
  const [isCreating, setIsCreating] = useState(false);
  const [error, setError] = useState<string | null>(null);
  
  const [currentParams, setCurrentParams] = useState<PurchaseOrderSearchParams>({});
  const [pagination, setPagination] = useState({
    page: 1,
    limit: 50,
    total: 0,
    totalPages: 0
  });
  
  // Load purchase orders
  const loadPurchaseOrders = useCallback(async (params: PurchaseOrderSearchParams = {}) => {
    if (!user?.tenant_id) return;
    
    try {
      setIsLoading(true);
      setError(null);
      
      const searchParams = {
        ...params,
        limit: pagination.limit,
        offset: ((params.offset !== undefined ? Math.floor(params.offset / pagination.limit) : pagination.page) - 1) * pagination.limit
      };
      
      setCurrentParams(params);
      
      const data = await suppliersService.getPurchaseOrders(user.tenant_id, searchParams);
      setPurchaseOrders(data);
      
      // Update pagination
      const hasMore = data.length === pagination.limit;
      const currentPage = Math.floor((searchParams.offset || 0) / pagination.limit) + 1;
      
      setPagination(prev => ({
        ...prev,
        page: currentPage,
        total: hasMore ? (currentPage * pagination.limit) + 1 : (currentPage - 1) * pagination.limit + data.length,
        totalPages: hasMore ? currentPage + 1 : currentPage
      }));
      
    } catch (err: any) {
      setError(err.response?.data?.detail || err.message || 'Failed to load purchase orders');
    } finally {
      setIsLoading(false);
    }
  }, [user?.tenant_id, pagination.limit]);
  
  // Other purchase order methods...
  const loadPurchaseOrder = useCallback(async (poId: string) => {
    if (!user?.tenant_id) return;
    
    try {
      setIsLoading(true);
      setError(null);
      
      const data = await suppliersService.getPurchaseOrder(user.tenant_id, poId);
      setPurchaseOrder(data);
      
    } catch (err: any) {
      setError(err.response?.data?.detail || err.message || 'Failed to load purchase order');
    } finally {
      setIsLoading(false);
    }
  }, [user?.tenant_id]);
  
  const loadStatistics = useCallback(async () => {
    if (!user?.tenant_id) return;
    
    try {
      const data = await suppliersService.getPurchaseOrderStatistics(user.tenant_id);
      setStatistics(data);
    } catch (err: any) {
      console.error('Failed to load purchase order statistics:', err);
    }
  }, [user?.tenant_id]);
  
  const loadOrdersRequiringApproval = useCallback(async () => {
    if (!user?.tenant_id) return;
    
    try {
      const data = await suppliersService.getOrdersRequiringApproval(user.tenant_id);
      setOrdersRequiringApproval(data);
    } catch (err: any) {
      console.error('Failed to load orders requiring approval:', err);
    }
  }, [user?.tenant_id]);
  
  const loadOverdueOrders = useCallback(async () => {
    if (!user?.tenant_id) return;
    
    try {
      const data = await suppliersService.getOverdueOrders(user.tenant_id);
      setOverdueOrders(data);
    } catch (err: any) {
      console.error('Failed to load overdue orders:', err);
    }
  }, [user?.tenant_id]);
  
  const createPurchaseOrder = useCallback(async (data: CreatePurchaseOrderRequest): Promise<PurchaseOrder | null> => {
    if (!user?.tenant_id || !user?.id) return null;
    
    try {
      setIsCreating(true);
      setError(null);
      
      const order = await suppliersService.createPurchaseOrder(user.tenant_id, user.id, data);
      
      // Refresh orders list
      await loadPurchaseOrders(currentParams);
      await loadStatistics();
      
      return order;
      
    } catch (err: any) {
      const errorMessage = err.response?.data?.detail || err.message || 'Failed to create purchase order';
      setError(errorMessage);
      return null;
    } finally {
      setIsCreating(false);
    }
  }, [user?.tenant_id, user?.id, loadPurchaseOrders, loadStatistics, currentParams]);
  
  const updateOrderStatus = useCallback(async (poId: string, status: string, notes?: string): Promise<PurchaseOrder | null> => {
    if (!user?.tenant_id || !user?.id) return null;
    
    try {
      setError(null);
      
      const updatedOrder = await suppliersService.updatePurchaseOrderStatus(user.tenant_id, user.id, poId, status, notes);
      
      if (purchaseOrder?.id === poId) {
        setPurchaseOrder(updatedOrder);
      }
      
      await loadPurchaseOrders(currentParams);
      
      return updatedOrder;
      
    } catch (err: any) {
      const errorMessage = err.response?.data?.detail || err.message || 'Failed to update order status';
      setError(errorMessage);
      return null;
    }
  }, [user?.tenant_id, user?.id, purchaseOrder?.id, loadPurchaseOrders, currentParams]);
  
  const approveOrder = useCallback(async (poId: string, action: 'approve' | 'reject', notes?: string): Promise<PurchaseOrder | null> => {
    if (!user?.tenant_id || !user?.id) return null;
    
    try {
      setError(null);
      
      const updatedOrder = await suppliersService.approvePurchaseOrder(user.tenant_id, user.id, poId, action, notes);
      
      if (purchaseOrder?.id === poId) {
        setPurchaseOrder(updatedOrder);
      }
      
      await loadPurchaseOrders(currentParams);
      await loadOrdersRequiringApproval();
      
      return updatedOrder;
      
    } catch (err: any) {
      const errorMessage = err.response?.data?.detail || err.message || `Failed to ${action} order`;
      setError(errorMessage);
      return null;
    }
  }, [user?.tenant_id, user?.id, purchaseOrder?.id, loadPurchaseOrders, loadOrdersRequiringApproval, currentParams]);
  
  const sendToSupplier = useCallback(async (poId: string, sendEmail: boolean = true): Promise<PurchaseOrder | null> => {
    if (!user?.tenant_id || !user?.id) return null;
    
    try {
      setError(null);
      
      const updatedOrder = await suppliersService.sendToSupplier(user.tenant_id, user.id, poId, sendEmail);
      
      if (purchaseOrder?.id === poId) {
        setPurchaseOrder(updatedOrder);
      }
      
      await loadPurchaseOrders(currentParams);
      
      return updatedOrder;
      
    } catch (err: any) {
      const errorMessage = err.response?.data?.detail || err.message || 'Failed to send order to supplier';
      setError(errorMessage);
      return null;
    }
  }, [user?.tenant_id, user?.id, purchaseOrder?.id, loadPurchaseOrders, currentParams]);
  
  const cancelOrder = useCallback(async (poId: string, reason: string): Promise<PurchaseOrder | null> => {
    if (!user?.tenant_id || !user?.id) return null;
    
    try {
      setError(null);
      
      const updatedOrder = await suppliersService.cancelPurchaseOrder(user.tenant_id, user.id, poId, reason);
      
      if (purchaseOrder?.id === poId) {
        setPurchaseOrder(updatedOrder);
      }
      
      await loadPurchaseOrders(currentParams);
      
      return updatedOrder;
      
    } catch (err: any) {
      const errorMessage = err.response?.data?.detail || err.message || 'Failed to cancel order';
      setError(errorMessage);
      return null;
    }
  }, [user?.tenant_id, user?.id, purchaseOrder?.id, loadPurchaseOrders, currentParams]);
  
  const clearError = useCallback(() => {
    setError(null);
  }, []);
  
  const refresh = useCallback(async () => {
    await loadPurchaseOrders(currentParams);
    if (statistics) await loadStatistics();
    if (ordersRequiringApproval.length > 0) await loadOrdersRequiringApproval();
    if (overdueOrders.length > 0) await loadOverdueOrders();
  }, [currentParams, statistics, ordersRequiringApproval.length, overdueOrders.length, loadPurchaseOrders, loadStatistics, loadOrdersRequiringApproval, loadOverdueOrders]);
  
  const setPage = useCallback((page: number) => {
    setPagination(prev => ({ ...prev, page }));
    const offset = (page - 1) * pagination.limit;
    loadPurchaseOrders({ ...currentParams, offset });
  }, [pagination.limit, currentParams, loadPurchaseOrders]);
  
  return {
    purchaseOrders,
    purchaseOrder,
    statistics,
    ordersRequiringApproval,
    overdueOrders,
    isLoading,
    isCreating,
    error,
    pagination,
    
    loadPurchaseOrders,
    loadPurchaseOrder,
    loadStatistics,
    loadOrdersRequiringApproval,
    loadOverdueOrders,
    createPurchaseOrder,
    updateOrderStatus,
    approveOrder,
    sendToSupplier,
    cancelOrder,
    clearError,
    refresh,
    setPage
  };
}

// ============================================================================
// DELIVERIES HOOK
// ============================================================================

export interface UseDeliveries {
  deliveries: Delivery[];
  delivery: Delivery | null;
  todaysDeliveries: Delivery[];
  overdueDeliveries: Delivery[];
  performanceStats: DeliveryPerformanceStats | null;
  isLoading: boolean;
  error: string | null;
  pagination: {
    page: number;
    limit: number;
    total: number;
    totalPages: number;
  };
  
  loadDeliveries: (params?: DeliverySearchParams) => Promise<void>;
  loadDelivery: (deliveryId: string) => Promise<void>;
  loadTodaysDeliveries: () => Promise<void>;
  loadOverdueDeliveries: () => Promise<void>;
  loadPerformanceStats: (daysBack?: number, supplierId?: string) => Promise<void>;
  updateDeliveryStatus: (deliveryId: string, status: string, notes?: string) => Promise<Delivery | null>;
  receiveDelivery: (deliveryId: string, receiptData: any) => Promise<Delivery | null>;
  clearError: () => void;
  refresh: () => Promise<void>;
  setPage: (page: number) => void;
}

export function useDeliveries(): UseDeliveries {
  const { user } = useAuth();
  
  // State
  const [deliveries, setDeliveries] = useState<Delivery[]>([]);
  const [delivery, setDelivery] = useState<Delivery | null>(null);
  const [todaysDeliveries, setTodaysDeliveries] = useState<Delivery[]>([]);
  const [overdueDeliveries, setOverdueDeliveries] = useState<Delivery[]>([]);
  const [performanceStats, setPerformanceStats] = useState<DeliveryPerformanceStats | null>(null);
  
  const [isLoading, setIsLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);
  
  const [currentParams, setCurrentParams] = useState<DeliverySearchParams>({});
  const [pagination, setPagination] = useState({
    page: 1,
    limit: 50,
    total: 0,
    totalPages: 0
  });
  
  // Load deliveries
  const loadDeliveries = useCallback(async (params: DeliverySearchParams = {}) => {
    if (!user?.tenant_id) return;
    
    try {
      setIsLoading(true);
      setError(null);
      
      const searchParams = {
        ...params,
        limit: pagination.limit,
        offset: ((params.offset !== undefined ? Math.floor(params.offset / pagination.limit) : pagination.page) - 1) * pagination.limit
      };
      
      setCurrentParams(params);
      
      const data = await suppliersService.getDeliveries(user.tenant_id, searchParams);
      setDeliveries(data);
      
      // Update pagination
      const hasMore = data.length === pagination.limit;
      const currentPage = Math.floor((searchParams.offset || 0) / pagination.limit) + 1;
      
      setPagination(prev => ({
        ...prev,
        page: currentPage,
        total: hasMore ? (currentPage * pagination.limit) + 1 : (currentPage - 1) * pagination.limit + data.length,
        totalPages: hasMore ? currentPage + 1 : currentPage
      }));
      
    } catch (err: any) {
      setError(err.response?.data?.detail || err.message || 'Failed to load deliveries');
    } finally {
      setIsLoading(false);
    }
  }, [user?.tenant_id, pagination.limit]);
  
  const loadDelivery = useCallback(async (deliveryId: string) => {
    if (!user?.tenant_id) return;
    
    try {
      setIsLoading(true);
      setError(null);
      
      const data = await suppliersService.getDelivery(user.tenant_id, deliveryId);
      setDelivery(data);
      
    } catch (err: any) {
      setError(err.response?.data?.detail || err.message || 'Failed to load delivery');
    } finally {
      setIsLoading(false);
    }
  }, [user?.tenant_id]);
  
  const loadTodaysDeliveries = useCallback(async () => {
    if (!user?.tenant_id) return;
    
    try {
      const data = await suppliersService.getTodaysDeliveries(user.tenant_id);
      setTodaysDeliveries(data);
    } catch (err: any) {
      console.error('Failed to load today\'s deliveries:', err);
    }
  }, [user?.tenant_id]);
  
  const loadOverdueDeliveries = useCallback(async () => {
    if (!user?.tenant_id) return;
    
    try {
      const data = await suppliersService.getOverdueDeliveries(user.tenant_id);
      setOverdueDeliveries(data);
    } catch (err: any) {
      console.error('Failed to load overdue deliveries:', err);
    }
  }, [user?.tenant_id]);
  
  const loadPerformanceStats = useCallback(async (daysBack: number = 30, supplierId?: string) => {
    if (!user?.tenant_id) return;
    
    try {
      const data = await suppliersService.getDeliveryPerformanceStats(user.tenant_id, daysBack, supplierId);
      setPerformanceStats(data);
    } catch (err: any) {
      console.error('Failed to load delivery performance stats:', err);
    }
  }, [user?.tenant_id]);
  
  const updateDeliveryStatus = useCallback(async (deliveryId: string, status: string, notes?: string): Promise<Delivery | null> => {
    if (!user?.tenant_id || !user?.id) return null;
    
    try {
      setError(null);
      
      const updatedDelivery = await suppliersService.updateDeliveryStatus(user.tenant_id, user.id, deliveryId, status, notes);
      
      if (delivery?.id === deliveryId) {
        setDelivery(updatedDelivery);
      }
      
      await loadDeliveries(currentParams);
      
      return updatedDelivery;
      
    } catch (err: any) {
      const errorMessage = err.response?.data?.detail || err.message || 'Failed to update delivery status';
      setError(errorMessage);
      return null;
    }
  }, [user?.tenant_id, user?.id, delivery?.id, loadDeliveries, currentParams]);
  
  const receiveDelivery = useCallback(async (deliveryId: string, receiptData: any): Promise<Delivery | null> => {
    if (!user?.tenant_id || !user?.id) return null;
    
    try {
      setError(null);
      
      const updatedDelivery = await suppliersService.receiveDelivery(user.tenant_id, user.id, deliveryId, receiptData);
      
      if (delivery?.id === deliveryId) {
        setDelivery(updatedDelivery);
      }
      
      await loadDeliveries(currentParams);
      
      return updatedDelivery;
      
    } catch (err: any) {
      const errorMessage = err.response?.data?.detail || err.message || 'Failed to receive delivery';
      setError(errorMessage);
      return null;
    }
  }, [user?.tenant_id, user?.id, delivery?.id, loadDeliveries, currentParams]);
  
  const clearError = useCallback(() => {
    setError(null);
  }, []);
  
  const refresh = useCallback(async () => {
    await loadDeliveries(currentParams);
    if (todaysDeliveries.length > 0) await loadTodaysDeliveries();
    if (overdueDeliveries.length > 0) await loadOverdueDeliveries();
    if (performanceStats) await loadPerformanceStats();
  }, [currentParams, todaysDeliveries.length, overdueDeliveries.length, performanceStats, loadDeliveries, loadTodaysDeliveries, loadOverdueDeliveries, loadPerformanceStats]);
  
  const setPage = useCallback((page: number) => {
    setPagination(prev => ({ ...prev, page }));
    const offset = (page - 1) * pagination.limit;
    loadDeliveries({ ...currentParams, offset });
  }, [pagination.limit, currentParams, loadDeliveries]);
  
  return {
    deliveries,
    delivery,
    todaysDeliveries,
    overdueDeliveries,
    performanceStats,
    isLoading,
    error,
    pagination,
    
    loadDeliveries,
    loadDelivery,
    loadTodaysDeliveries,
    loadOverdueDeliveries,
    loadPerformanceStats,
    updateDeliveryStatus,
    receiveDelivery,
    clearError,
    refresh,
    setPage
  };
}