/**
 * Inventory setup hook for creating inventory from suggestions
 */

import { useState, useCallback } from 'react';
import { 
  useCreateIngredient, 
  useCreateSalesRecord,
} from '../../../api';
import { useCurrentTenant } from '../../../stores';
import type { ProductSuggestionResponse } from './types';

interface InventorySetupState {
  isLoading: boolean;
  error: string | null;
  createdItems: any[];
  inventoryMapping: { [productName: string]: string };
  salesImportResult: {
    success: boolean;
    imported: boolean;
    records_created: number;
    message: string;
  } | null;
  isInventoryConfigured: boolean;
}

interface InventorySetupActions {
  createInventoryFromSuggestions: (
    suggestions: ProductSuggestionResponse[]
  ) => Promise<{
    success: boolean;
    createdItems?: any[];
    inventoryMapping?: { [productName: string]: string };
  }>;
  importSalesData: (
    salesData: any,
    inventoryMapping: { [productName: string]: string }
  ) => Promise<{
    success: boolean;
    recordsCreated: number;
    message: string;
  }>;
  clearError: () => void;
  reset: () => void;
}

export const useInventorySetup = () => {
  const [state, setState] = useState<InventorySetupState>({
    isLoading: false,
    error: null,
    createdItems: [],
    inventoryMapping: {},
    salesImportResult: null,
    isInventoryConfigured: false,
  });

  const createIngredientMutation = useCreateIngredient();
  const createSalesRecordMutation = useCreateSalesRecord();
  const currentTenant = useCurrentTenant();

  const createInventoryFromSuggestions = useCallback(async (
    suggestions: ProductSuggestionResponse[]
  ): Promise<{
    success: boolean;
    createdItems?: any[];
    inventoryMapping?: { [productName: string]: string };
  }> => {
    if (!suggestions || suggestions.length === 0) {
      setState(prev => ({
        ...prev,
        error: 'No hay sugerencias para crear el inventario',
      }));
      return { success: false };
    }

    if (!currentTenant?.id) {
      setState(prev => ({
        ...prev,
        error: 'No se pudo obtener información del tenant',
      }));
      return { success: false };
    }

    setState(prev => ({ 
      ...prev, 
      isLoading: true, 
      error: null 
    }));

    try {
      const createdItems = [];
      const inventoryMapping: { [key: string]: string } = {};
      
      // Create ingredients from approved suggestions
      for (const suggestion of suggestions) {
        try {
          const ingredientData = {
            name: suggestion.name,
            category: suggestion.category || 'Sin categoría',
            description: suggestion.description || '',
            unit_of_measure: suggestion.unit_of_measure || 'unidad',
            cost_per_unit: suggestion.cost_per_unit || 0,
            supplier_info: suggestion.supplier_info || {},
            nutritional_info: suggestion.nutritional_info || {},
            storage_requirements: suggestion.storage_requirements || {},
            allergen_info: suggestion.allergen_info || {},
            is_active: true,
          };

          const createdItem = await createIngredientMutation.mutateAsync({
            tenantId: currentTenant.id,
            ingredientData,
          });
          
          createdItems.push(createdItem);
          inventoryMapping[suggestion.name] = createdItem.id;
        } catch (error) {
          console.error(`Error creating ingredient ${suggestion.name}:`, error);
          // Continue with other ingredients even if one fails
        }
      }

      if (createdItems.length === 0) {
        throw new Error('No se pudo crear ningún elemento del inventario');
      }
      
      setState(prev => ({ 
        ...prev, 
        isLoading: false,
        createdItems,
        inventoryMapping,
        isInventoryConfigured: true,
      }));

      return {
        success: true,
        createdItems,
        inventoryMapping,
      };
    } catch (error) {
      const errorMessage = error instanceof Error ? error.message : 'Error creando el inventario';
      setState(prev => ({ 
        ...prev, 
        isLoading: false, 
        error: errorMessage 
      }));
      return { success: false };
    }
  }, [createIngredientMutation, currentTenant]);

  const importSalesData = useCallback(async (
    salesData: any,
    inventoryMapping: { [productName: string]: string }
  ): Promise<{
    success: boolean;
    recordsCreated: number;
    message: string;
  }> => {
    if (!currentTenant?.id) {
      setState(prev => ({
        ...prev,
        error: 'No se pudo obtener información del tenant',
      }));
      return {
        success: false,
        recordsCreated: 0,
        message: 'Error: No se pudo obtener información del tenant',
      };
    }

    if (!salesData || !salesData.product_list) {
      setState(prev => ({
        ...prev,
        error: 'No hay datos de ventas para importar',
      }));
      return {
        success: false,
        recordsCreated: 0,
        message: 'Error: No hay datos de ventas para importar',
      };
    }

    setState(prev => ({ 
      ...prev, 
      isLoading: true, 
      error: null 
    }));

    try {
      let recordsCreated = 0;

      // Process actual sales data and create sales records
      if (salesData.raw_data && Array.isArray(salesData.raw_data)) {
        for (const salesRecord of salesData.raw_data) {
          try {
            // Map product name to inventory product ID
            const inventoryProductId = inventoryMapping[salesRecord.product_name];
            
            if (inventoryProductId) {
              const salesRecordData = {
                date: salesRecord.date,
                product_name: salesRecord.product_name,
                inventory_product_id: inventoryProductId,
                quantity_sold: salesRecord.quantity,
                unit_price: salesRecord.unit_price,
                total_revenue: salesRecord.total_amount || (salesRecord.quantity * salesRecord.unit_price),
                channel: salesRecord.channel || 'tienda',
                customer_info: salesRecord.customer_info || {},
                notes: salesRecord.notes || '',
              };

              await createSalesRecordMutation.mutateAsync({
                tenantId: currentTenant.id,
                salesData: salesRecordData,
              });

              recordsCreated++;
            }
          } catch (error) {
            console.error('Error creating sales record:', error);
            // Continue with next record
          }
        }
      }

      const result = {
        success: recordsCreated > 0,
        imported: recordsCreated > 0,
        records_created: recordsCreated,
        message: recordsCreated > 0 
          ? `Se importaron ${recordsCreated} registros de ventas exitosamente`
          : 'No se pudieron importar registros de ventas',
      };

      setState(prev => ({ 
        ...prev, 
        isLoading: false,
        salesImportResult: result,
      }));

      return {
        success: result.success,
        recordsCreated,
        message: result.message,
      };
    } catch (error) {
      const errorMessage = error instanceof Error ? error.message : 'Error importando datos de ventas';
      const result = {
        success: false,
        imported: false,
        records_created: 0,
        message: errorMessage,
      };

      setState(prev => ({ 
        ...prev, 
        isLoading: false, 
        error: errorMessage,
        salesImportResult: result,
      }));

      return {
        success: false,
        recordsCreated: 0,
        message: errorMessage,
      };
    }
  }, [createSalesRecordMutation, currentTenant]);

  const clearError = useCallback(() => {
    setState(prev => ({ ...prev, error: null }));
  }, []);

  const reset = useCallback(() => {
    setState({
      isLoading: false,
      error: null,
      createdItems: [],
      inventoryMapping: {},
      salesImportResult: null,
      isInventoryConfigured: false,
    });
  }, []);

  return {
    // State
    isLoading: state.isLoading,
    error: state.error,
    createdItems: state.createdItems,
    inventoryMapping: state.inventoryMapping,
    salesImportResult: state.salesImportResult,
    isInventoryConfigured: state.isInventoryConfigured,
    
    // Actions
    createInventoryFromSuggestions,
    importSalesData,
    clearError,
    reset,
  } satisfies InventorySetupState & InventorySetupActions;
};