package services

import (
	"nearle/models"
	"nearle/repositories"
	"time"
)

type ProductService interface {
	GetProductSubCategory(categoryID, tenantID int) ([]models.ProductSubCategory, error)
	GetProductCount(tenantID, categoryID, subcategoryID int, approve string) ([]models.Productcount, error)
	GetProductCategory() ([]models.ProductCategory, error)
	GetProductVariants(tenantID, subcategoryID int) ([]models.Productvariant, error)
	GetCatalougeProducts(tenantID, locationID, subcategoryID, pageno, pagesize int, keyword string) ([]models.Products, error)
	GetProductStocks(tenantID, locationID string) ([]models.Productstocks, error)
	UpdateProductStatus(productIDs []int, status string) error
	CreateProductStock(stocks []models.Productstock) error
	CreateProduct(product models.Products) error
	UpdateProduct(product models.Products) error
	DeleteProduct(productID int) error
	GetStockStatement(tenantID, locationID, subcategoryID, pageno, pagesize int, keyword string) ([]models.Productstockstatement, error)
	GetLocationProducts(tenantID, locationID, subcategoryID, pageno, pagesize int, keyword string) ([]models.Locationproducts, error)
	GetLocationProductSummary(tenantID, locationID int) ([]models.ProductSummary, error)
	FetchFilteredProducts(categoryID, subcategoryID, productID, applocationID, tenantID, locationID int, keyword, productStatus, approve string, pageno, pagesize int) ([]models.Tenantproducts, error)
	GetProductByVariant(tenantid, variantid int) ([]models.Products, error)
	GetProductsBySubcategory(params models.ProductFilter) (map[string]interface{}, error)
	UpdateProductLocation(input models.Productlocations) error
	CreateProductLocation(input []models.Productlocations) error
	CreateProductVariant(input models.Productvariant) error
}
type productService struct {
	repo repositories.ProductRepository
}

func NewProductService(repo repositories.ProductRepository) ProductService {
	return &productService{repo: repo}
}

func (s *productService) GetProductSubCategory(categoryID, tenantID int) ([]models.ProductSubCategory, error) {
	return s.repo.GetProductSubCategory(categoryID, tenantID)
}

func (s *productService) GetProductCount(tenantID, categoryID, subcategoryID int, approve string) ([]models.Productcount, error) {
	return s.repo.GetProductCount(tenantID, categoryID, subcategoryID, approve)
}

func (s *productService) GetProductCategory() ([]models.ProductCategory, error) {
	return s.repo.GetProductCategory()
}

func (s *productService) GetProductVariants(tenantID, subcategoryID int) ([]models.Productvariant, error) {
	return s.repo.GetProductVariants(tenantID, subcategoryID)
}

func (s *productService) GetCatalougeProducts(tenantID, locationID, subcategoryID, pageno, pagesize int, keyword string) ([]models.Products, error) {
	return s.repo.GetCatalougeProducts(tenantID, locationID, subcategoryID, pageno, pagesize, keyword)
}

func (s *productService) GetProductStocks(tenantID, locationID string) ([]models.Productstocks, error) {
	return s.repo.GetProductStocks(tenantID, locationID)
}

func (s *productService) CreateProductStock(stocks []models.Productstock) error {

	for i := range stocks {
		stocks[i].Stockdate = time.Now()
	}

	if err := s.repo.CreateProductStock(stocks); err != nil {
		return err
	}

	idMap := make(map[int]struct{})
	var productIDs []int
	for _, s := range stocks {
		if s.Productid > 0 {
			if _, exists := idMap[s.Productid]; !exists {
				idMap[s.Productid] = struct{}{}
				productIDs = append(productIDs, s.Productid)
			}
		}
	}

	if len(productIDs) > 0 {
		if err := s.repo.UpdateProductStatus(productIDs, "available"); err != nil {
			return err
		}
	}

	return nil
}

func (s *productService) UpdateProductStatus(productIDs []int, status string) error {
	return s.repo.UpdateProductStatus(productIDs, status)
}

func (s *productService) CreateProduct(product models.Products) error {
	return s.repo.CreateProduct(product)
}

func (s *productService) UpdateProduct(product models.Products) error {
	return s.repo.UpdateProduct(product)
}

func (s *productService) DeleteProduct(productID int) error {
	return s.repo.DeleteProduct(productID)
}

func (s *productService) GetStockStatement(tenantID, locationID, subcategoryID, pageno, pagesize int, keyword string) ([]models.Productstockstatement, error) {
	return s.repo.GetStockStatement(tenantID, locationID, subcategoryID, pageno, pagesize, keyword)
}

func (s *productService) GetLocationProducts(tenantID, locationID, subcategoryID, pageno, pagesize int, keyword string) ([]models.Locationproducts, error) {
	return s.repo.GetLocationProducts(tenantID, locationID, subcategoryID, pageno, pagesize, keyword)
}

func (s *productService) GetLocationProductSummary(tenantID, locationID int) ([]models.ProductSummary, error) {
	return s.repo.GetLocationProductSummary(tenantID, locationID)
}

func (s *productService) FetchFilteredProducts(categoryID, subcategoryID, productID, applocationID, tenantID, locationID int, keyword, productStatus,
	approve string, pageno, pagesize int) ([]models.Tenantproducts, error) {
	return s.repo.FetchFilteredProducts(categoryID, subcategoryID, productID, applocationID, tenantID, locationID, keyword, productStatus, approve, pageno, pagesize)
}

func (s *productService) GetProductByVariant(tenantid, variantid int) ([]models.Products, error) {

	var data []models.Products

	result, err := s.repo.GetProductByVariant(tenantid, variantid)

	if err != nil {
		return nil, err
	}

	data = result

	return data, nil

}

func (s *productService) GetProductsBySubcategory(params models.ProductFilter) (map[string]interface{}, error) {

	subcategories, err := s.repo.GetSubcategories(params.CategoryID)
	if err != nil {
		return nil, err
	}

	products, err := s.repo.GetProducts(params)
	if err != nil {
		return nil, err
	}

	var details []models.SubcategoryProductResponse
	var uncategorized []models.Products

	for _, sub := range subcategories {
		var subProducts []models.Products
		for _, p := range products {
			if p.Subcategoryid == sub.Subcategoryid {
				subProducts = append(subProducts, p)
			}
		}
		if len(subProducts) > 0 {
			details = append(details, models.SubcategoryProductResponse{
				SubcategoryID:   sub.Subcategoryid,
				SubcategoryName: sub.Subcategoryname,
				Image:           sub.Image,
				Products:        subProducts,
			})
		}
	}

	for _, p := range products {
		if p.Subcategoryid == 0 {
			uncategorized = append(uncategorized, p)
		}
	}
	if len(uncategorized) > 0 {
		details = append(details, models.SubcategoryProductResponse{
			SubcategoryID:   0,
			SubcategoryName: "Uncategorized",
			Products:        uncategorized,
		})
	}

	if params.TenantID > 0 {
		tenantInfo, err := s.repo.GetTenantInfo(params.TenantID, params.AppLocationID)
		if err == nil && tenantInfo != nil {
			tenantInfo["details"] = details
			return tenantInfo, nil
		}
	}

	return map[string]interface{}{"details": details}, nil
}

func (s *productService) UpdateProductLocation(input models.Productlocations) error {
	return s.repo.UpdateProductLocation(input)
}

func (s *productService) CreateProductLocation(input []models.Productlocations) error {
	return s.repo.CreateProductLocation(input)
}

func (s *productService) CreateProductVariant(input models.Productvariant) error {
	return s.repo.CreateProductVariant(input)
}