AI document parsing small fixes (ismeasurable fix)

ShippingItem.UnitCostOnDocument added
other developments

Nop.Plugin.Misc.AIPlugin/Areas/Admin/Controllers/FileManagerController.cs

@@ -207,7 +207,7 @@ namespace Nop.Plugin.Misc.FruitBank.Controllers
                 Console.WriteLine($"Product analysis Result: {deserializedContent.extractedData.products}");
 
                 //identify products from database
-                var allProducts = await _dbContext.ProductDtos.GetAll().ToListAsync();
+                var allProducts = await _dbContext.ProductDtos.GetAll(true).ToListAsync();
                 var historicalProducts = await _dbContext.ShippingItems.GetAll().ToListAsync();
 
                 //create json from product analyzis jsonstring
@@ -300,7 +300,7 @@ namespace Nop.Plugin.Misc.FruitBank.Controllers
         private async Task<List<ShippingItem>> DetermineProducts(List<ProductDto> allProducts, List<ShippingItem> historicalProducts, ProductReferenceResponse deserializedProducts)
         {
             List<ShippingItem> finalMatchedProducts = new List<ShippingItem>();
-
+            //List<ProductDto> allProductDtos = await _dbContext.ProductDtos.GetAll(true).ToListAsync();
             // Load all shipping items once
             var allShippingItems = await _dbContext.ShippingItems.GetAll(true).ToListAsync();
 
@@ -316,7 +316,7 @@ namespace Nop.Plugin.Misc.FruitBank.Controllers
                 if (historicalProduct != null)
                 {
                     Console.WriteLine($"Historical product found: {historicalProduct.Name}");
-                    var productDto = await _dbContext.ProductDtos.GetByIdAsync(historicalProduct.ProductId);
+                    var productDto = allProducts.FirstOrDefault(p => p.Id == historicalProduct.ProductId);
 
                     if (productDto != null)
                     {
@@ -542,7 +542,9 @@ namespace Nop.Plugin.Misc.FruitBank.Controllers
                 NetWeightOnDocument = deserializedProduct.netWeight ?? 0,
                 GrossWeightOnDocument = deserializedProduct.grossWeight ?? 0,
                 ProductId = productDto.Id,
-                NameOnDocument = deserializedProduct.name
+                NameOnDocument = deserializedProduct.name,
+                IsMeasurable = productDto.IsMeasurable,
+                UnitPriceOnDocument = deserializedProduct.unitCost
             };
         }
 
@@ -894,6 +896,7 @@ namespace Nop.Plugin.Misc.FruitBank.Controllers
         public double? netWeight { get; set; }
         public double? grossWeight { get; set; }
         public int? productId { get; set; }
+        public double unitCost { get; set; }
     }
 
     public class ProductReferenceResponse

Nop.Plugin.Misc.AIPlugin/Areas/Admin/Controllers/VoiceOrderController.cs

@@ -70,15 +70,69 @@ namespace Nop.Plugin.Misc.FruitBankPlugin.Areas.Admin.Controllers
 
             try
             {
-                // Transcribe audio
+                // Build partner names prompt for Whisper vocabulary hints
-                var transcribedText = await TranscribeAudioFile(audioFile, "hu");
+                // Whisper has a 224 character limit, so extract unique KEYWORDS instead of full names
+                var allCustomers = await _customerService.GetAllCustomersAsync(pageIndex: 0, pageSize: 300);
+
+                var companyNames = allCustomers
+                    .Where(c => !string.IsNullOrEmpty(c.Company))
+                    .Select(c => c.Company.Trim())
+                    .Distinct()
+                    .ToList();
+
+                // Extract unique keywords from company names
+                var keywords = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+                foreach (var company in companyNames)
+                {
+                    // Split by common separators and extract meaningful words
+                    var words = company.Split(new[] { ' ', ',', '.', '-', '/', '(', ')' }, StringSplitOptions.RemoveEmptyEntries);
+
+                    foreach (var word in words)
+                    {
+                        var cleaned = word.Trim();
+
+                        // Skip very short words, common abbreviations, and legal terms
+                        if (cleaned.Length < 3) continue;
+                        if (cleaned.Equals("BV", StringComparison.OrdinalIgnoreCase)) continue;
+                        if (cleaned.Equals("Ltd", StringComparison.OrdinalIgnoreCase)) continue;
+                        if (cleaned.Equals("Kft", StringComparison.OrdinalIgnoreCase)) continue;
+                        if (cleaned.Equals("Inc", StringComparison.OrdinalIgnoreCase)) continue;
+                        if (cleaned.Equals("GmbH", StringComparison.OrdinalIgnoreCase)) continue;
+                        if (cleaned.Equals("SRL", StringComparison.OrdinalIgnoreCase)) continue;
+
+                        keywords.Add(cleaned);
+                    }
+                }
+
+                // Build prompt from keywords, fitting as many as possible in 224 chars
+                var keywordList = keywords.OrderBy(k => k.Length).ToList();
+                var promptParts = new List<string>();
+                int currentLength = 0;
+                const int maxLength = 220;
+
+                foreach (var keyword in keywordList)
+                {
+                    var toAdd = promptParts.Count == 0 ? keyword : ", " + keyword;
+
+                    if (currentLength + toAdd.Length > maxLength)
+                        break;
+
+                    promptParts.Add(keyword);
+                    currentLength += toAdd.Length;
+                }
+
+                var partnerPrompt = string.Join(", ", promptParts);
+                Console.WriteLine($"[VoiceOrder] Whisper prompt with {promptParts.Count} keywords from {companyNames.Count} partners ({partnerPrompt.Length} chars)");
+
+                // Transcribe audio in HUNGARIAN with partner keywords as vocabulary hints
+                var transcribedText = await TranscribeAudioFile(audioFile, "hu", partnerPrompt);
 
                 if (string.IsNullOrEmpty(transcribedText))
                 {
                     return Json(new { success = false, message = "Failed to transcribe audio" });
                 }
 
-                Console.WriteLine($"[VoiceOrder] Partner transcription: {transcribedText}");
+                Console.WriteLine($"[VoiceOrder] Partner transcription (HU): {transcribedText}");
 
                 // Search for matching partners
                 var partners = await SearchPartners(transcribedText);
@@ -113,7 +167,7 @@ namespace Nop.Plugin.Misc.FruitBankPlugin.Areas.Admin.Controllers
 
             try
             {
-                // Transcribe audio
+                // Transcribe audio in HUNGARIAN
                 var transcribedText = await TranscribeAudioFile(audioFile, "hu");
 
                 if (string.IsNullOrEmpty(transcribedText))
@@ -121,7 +175,7 @@ namespace Nop.Plugin.Misc.FruitBankPlugin.Areas.Admin.Controllers
                     return Json(new { success = false, message = "Failed to transcribe audio" });
                 }
 
-                Console.WriteLine($"[VoiceOrder] Product transcription: {transcribedText}");
+                Console.WriteLine($"[VoiceOrder] Product transcription (HU): {transcribedText}");
 
                 // Parse products and quantities using AI
                 var parsedProducts = await ParseProductsFromText(transcribedText);
@@ -153,12 +207,95 @@ namespace Nop.Plugin.Misc.FruitBankPlugin.Areas.Admin.Controllers
             }
         }
 
+        /// <summary>
+        /// Search for partners by manually typed text (no audio transcription needed)
+        /// </summary>
+        [HttpPost]
+        public async Task<IActionResult> SearchPartnerByText(string text)
+        {
+            if (!await _permissionService.AuthorizeAsync(StandardPermission.Security.ACCESS_ADMIN_PANEL))
+                return Json(new { success = false, message = "Access denied" });
+
+            if (string.IsNullOrWhiteSpace(text))
+            {
+                return Json(new { success = false, message = "No text provided" });
+            }
+
+            try
+            {
+                Console.WriteLine($"[VoiceOrder] Manual partner search: {text}");
+
+                // Search for matching partners (same logic as voice)
+                var partners = await SearchPartners(text);
+
+                return Json(new
+                {
+                    success = true,
+                    transcription = text,
+                    partners = partners
+                });
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine($"[VoiceOrder] Error in SearchPartnerByText: {ex.Message}");
+                return Json(new { success = false, message = $"Error: {ex.Message}" });
+            }
+        }
+
+        /// <summary>
+        /// Parse manually typed product text (no audio transcription needed)
+        /// </summary>
+        [HttpPost]
+        public async Task<IActionResult> ParseManualProductText(string text)
+        {
+            if (!await _permissionService.AuthorizeAsync(StandardPermission.Security.ACCESS_ADMIN_PANEL))
+                return Json(new { success = false, message = "Access denied" });
+
+            if (string.IsNullOrWhiteSpace(text))
+            {
+                return Json(new { success = false, message = "No text provided" });
+            }
+
+            try
+            {
+                Console.WriteLine($"[VoiceOrder] Manual product input: {text}");
+
+                // Parse products and quantities using AI (same as voice)
+                var parsedProducts = await ParseProductsFromText(text);
+
+                if (parsedProducts == null || parsedProducts.Count == 0)
+                {
+                    return Json(new
+                    {
+                        success = false,
+                        message = "Could not parse products from text",
+                        transcription = text
+                    });
+                }
+
+                // Enrich with actual product data from database
+                var enrichedProducts = await EnrichProductData(parsedProducts);
+
+                return Json(new
+                {
+                    success = true,
+                    transcription = text,
+                    products = enrichedProducts
+                });
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine($"[VoiceOrder] Error in ParseManualProductText: {ex.Message}");
+                return Json(new { success = false, message = $"Error: {ex.Message}" });
+            }
+        }
+
         #region Helper Methods
 
         /// <summary>
         /// Transcribe audio file using OpenAI Whisper
         /// </summary>
-        private async Task<string> TranscribeAudioFile(IFormFile audioFile, string language)
+        private async Task<string> TranscribeAudioFile(IFormFile audioFile, string language, string customPrompt = null)
         {
             var fileName = $"voice_order_{DateTime.Now:yyyyMMdd_HHmmss}.webm";
             var uploadsFolder = Path.Combine(Directory.GetCurrentDirectory(), "wwwroot", "uploads", "voice");
@@ -180,7 +317,7 @@ namespace Nop.Plugin.Misc.FruitBankPlugin.Areas.Admin.Controllers
             string transcribedText;
             using (var audioStream = new FileStream(filePath, FileMode.Open, FileAccess.Read))
             {
-                transcribedText = await _aiApiService.TranscribeAudioAsync(audioStream, fileName, language);
+                transcribedText = await _aiApiService.TranscribeAudioAsync(audioStream, fileName, language, customPrompt);
             }
 
             // Clean up temporary file
@@ -195,16 +332,15 @@ namespace Nop.Plugin.Misc.FruitBankPlugin.Areas.Admin.Controllers
 
         /// <summary>
         /// Search for partners matching the transcribed text
-        /// Uses string-based search first, then semantic AI matching if needed
+        /// Uses both string-based and AI semantic search for best results
         /// </summary>
         private async Task<List<object>> SearchPartners(string searchTerm)
         {
             const int maxResults = 10;
-            const int minResultsForAI = 3; // If we get fewer than this, use AI semantic search
 
             Console.WriteLine($"[VoiceOrder] Searching partners for: {searchTerm}");
 
-            // Step 1: Try string-based search
+            // Step 1: String-based search (fast, catches exact matches)
             var customersByCompany = await _customerService.GetAllCustomersAsync(
                 company: searchTerm,
                 pageIndex: 0,
@@ -220,32 +356,29 @@ namespace Nop.Plugin.Misc.FruitBankPlugin.Areas.Admin.Controllers
                 pageIndex: 0,
                 pageSize: maxResults);
 
-            // Combine and deduplicate
+            // Combine string search results
-            var allCustomers = customersByCompany
+            var stringResults = customersByCompany
                 .Union(customersByName)
                 .Union(customersByLastName)
                 .DistinctBy(c => c.Id)
                 .Take(maxResults)
                 .ToList();
 
-            Console.WriteLine($"[VoiceOrder] String-based search found {allCustomers.Count} partners");
+            Console.WriteLine($"[VoiceOrder] String-based search found {stringResults.Count} partners");
 
-            // Step 2: If we don't have enough results, use AI semantic matching
+            // Step 2: ALWAYS use AI semantic search for better results
-            if (allCustomers.Count < minResultsForAI)
-            {
             Console.WriteLine("[VoiceOrder] Using AI semantic matching for partners");
-
             var aiMatches = await SemanticPartnerSearch(searchTerm);
+            Console.WriteLine($"[VoiceOrder] AI semantic search found {aiMatches.Count} partners");
 
-                // Merge AI matches with string matches, remove duplicates
+            // Step 3: Merge results - string matches first (exact), then AI matches
-                allCustomers = allCustomers
+            var allCustomers = stringResults
                 .Union(aiMatches)
                 .DistinctBy(c => c.Id)
                 .Take(maxResults)
                 .ToList();
 
-                Console.WriteLine($"[VoiceOrder] After AI matching: {allCustomers.Count} partners");
+            Console.WriteLine($"[VoiceOrder] Total unique partners: {allCustomers.Count}");
-            }
 
             // Format results
             var result = new List<object>();
@@ -278,10 +411,10 @@ namespace Nop.Plugin.Misc.FruitBankPlugin.Areas.Admin.Controllers
         {
             try
             {
-                // Get all customers with company names (limit to reasonable number)
+                // Get all customers with company names (increased limit)
                 var allCustomersWithCompany = await _customerService.GetAllCustomersAsync(
                     pageIndex: 0,
-                    pageSize: 500); // Reasonable limit for AI processing
+                    pageSize: 1000); // Increased from 500 to catch more companies
 
                 // Filter to only those with company names
                 var customersWithCompany = allCustomersWithCompany
@@ -294,28 +427,35 @@ namespace Nop.Plugin.Misc.FruitBankPlugin.Areas.Admin.Controllers
                     return new List<Nop.Core.Domain.Customers.Customer>();
                 }
 
+                Console.WriteLine($"[VoiceOrder] AI searching through {customersWithCompany.Count} companies");
+
                 // Build company list for AI
                 var companyList = string.Join("\n", customersWithCompany
                     .Select((c, index) => $"{index}|{c.Company}"));
 
                 var systemPrompt = @"You are a company name matcher for a B2B system.
-Given a spoken company name and a list of company names, find the 5 best semantic matches.
+Given a spoken company name and a list of company names, find the 5 best matches.
 
-RULES:
+CRITICAL MATCHING RULES (in priority order):
-1. Consider phonetic similarity (how it sounds)
+1. EXACT MATCH: If the search term appears exactly in a company name, prioritize it
-2. Consider abbreviations (e.g., 'SFI' matches 'SFI Rotterdam B.V.')
+2. SUBSTRING MATCH: If the search term is contained within a company name (e.g., 'Junket' in 'Junket Silver Kft.')
-3. Consider partial matches (e.g., 'Rotterdam' matches 'SFI Rotterdam B.V.')
+3. WORD MATCH: If all words from search term appear in company name (any order)
-4. Consider common misspellings or mishearings
+4. PARTIAL MATCH: If significant words overlap (e.g., 'Silver' matches 'Junket Silver')
-5. Return ONLY valid JSON array with indices, no explanations
+5. PHONETIC SIMILARITY: How it sounds when spoken
+6. ABBREVIATIONS: 'SFI' matches 'SFI Rotterdam B.V.'
 
-INPUT FORMAT:
+EXAMPLES:
-Search term: [spoken company name]
+Search: 'Junket Silver'
-Companies: [index]|[company name] (one per line)
+Should match: 'Junket Silver Kft.' (substring match - VERY HIGH PRIORITY)
+
+Search: 'Rotterdam'
+Should match: 'SFI Rotterdam B.V.' (substring match)
+
+Return ONLY a JSON array with the top 5 indices, ordered by best match first.
+If fewer than 5 matches exist, return fewer indices.
 
 OUTPUT FORMAT (JSON only):
-[0, 15, 42, 103, 256]
+[0, 15, 42, 103, 256]";
-
-Return the top 5 indices that best match the search term. If fewer than 5 good matches exist, return fewer indices.";
 
                 var userPrompt = $@"Search term: {searchTerm}
 Companies:
@@ -364,28 +504,51 @@ Companies:
         /// </summary>
         private async Task<List<ParsedProduct>> ParseProductsFromText(string text)
         {
-            var systemPrompt = @"You are a product parser for a Hungarian fruit wholesale company.
+            var systemPrompt = @"You are a product parser for a Hungarian fruit and vegetable wholesale company.
 Parse the product names and quantities from the user's speech.
 
-RULES:
+CRITICAL RULES:
-1. Extract product names and quantities
+1. Extract product names and quantities from ANY produce item (fruits, vegetables, herbs, etc.)
-2. Normalize product names to singular, lowercase (e.g., 'narancsok' → 'narancs')
+2. Normalize product names to singular, lowercase (e.g., 'narancsok' → 'narancs', 'áfonyák' → 'áfonya')
-3. Convert quantity units to standard format (kg, db, láda)
+3. Handle Hungarian number words ('száz' = 100, 'ötven' = 50, 'húsz' = 20, 'tíz' = 10, 'öt' = 5, 'egy' = 1, etc.)
-4. Handle Hungarian number words ('száz' = 100, 'ötven' = 50, etc.)
+4. FIX COMMON TRANSCRIPTION ERRORS:
-5. Return ONLY valid JSON array, no explanations
+   - 'datója' → 'datolya' (dates)
+   - 'szűlő' → 'szőlő' (grapes)
+   - 'mondarin' → 'mandarin' (mandarin)
+   - 'paprika' is correct (pepper/paprika)
+   - 'fokhagyma' is correct (garlic)
+   - Any obvious typo → correct it
+5. Return ONLY valid JSON array, no explanations or empty arrays
+6. DO NOT include units - only product name and quantity as a number
+7. ALWAYS return at least one product if you can parse anything from the input
 
 OUTPUT FORMAT (JSON only):
 [
-  {""product"": ""narancs"", ""quantity"": 100, ""unit"": ""kg""},
+  {""product"": ""narancs"", ""quantity"": 100},
-  {""product"": ""alma"", ""quantity"": 50, ""unit"": ""kg""}
+  {""product"": ""alma"", ""quantity"": 50}
 ]
 
 EXAMPLES:
 Input: 'narancs száz kilogram és alma ötven kiló'
-Output: [{""product"":""narancs"",""quantity"":100,""unit"":""kg""},{""product"":""alma"",""quantity"":50,""unit"":""kg""}]
+Output: [{""product"":""narancs"",""quantity"":100},{""product"":""alma"",""quantity"":50}]
 
-Input: 'Kérek 200 kg narancsot meg 150 kg almát'
+Input: 'fokhagyma, 1'
-Output: [{""product"":""narancs"",""quantity"":200,""unit"":""kg""},{""product"":""alma"",""quantity"":150,""unit"":""kg""}]";
+Output: [{""product"":""fokhagyma"",""quantity"":1}]
+
+Input: 'paprika, öt rekesz'
+Output: [{""product"":""paprika"",""quantity"":5}]
+
+Input: 'mondarin öt rekesz' (typo in 'mandarin')
+Output: [{""product"":""mandarin"",""quantity"":5}]
+
+Input: 'menta, 1'
+Output: [{""product"":""menta"",""quantity"":1}]
+
+Input: 'datója tíz láda' (WRONG transcription)
+Output: [{""product"":""datolya"",""quantity"":10}]
+
+Input: 'szűlő ötven kiló' (WRONG transcription)
+Output: [{""product"":""szőlő"",""quantity"":50}]";
 
             var userPrompt = $"Parse this: {text}";
 
@@ -417,18 +580,22 @@ Output: [{""product"":""narancs"",""quantity"":200,""unit"":""kg""},{""product""
 
         /// <summary>
         /// Enrich parsed products with actual product data from database
+        /// Returns ALL matching products so admin can select the exact one
         /// </summary>
         private async Task<List<object>> EnrichProductData(List<ParsedProduct> parsedProducts)
         {
             var enrichedProducts = new List<object>();
 
+            // OPTIMIZATION: Load all ProductDtos once instead of querying one by one
+            var helperProductDtos = await _dbContext.ProductDtos.GetAll(true).ToListAsync();
+
             foreach (var parsed in parsedProducts)
             {
-                // Search for matching product in database
+                // Search for ALL matching products in database
                 var products = await _productService.SearchProductsAsync(
                     keywords: parsed.Product,
                     pageIndex: 0,
-                    pageSize: 5);
+                    pageSize: 20); // Get up to 20 matches
 
                 if (!products.Any())
                 {
@@ -436,9 +603,12 @@ Output: [{""product"":""narancs"",""quantity"":200,""unit"":""kg""},{""product""
                     continue;
                 }
 
-                // Take the best match (first result)
+                Console.WriteLine($"[VoiceOrder] Found {products.Count()} products matching '{parsed.Product}'");
-                var product = products.First();
+
-                var productDto = await _dbContext.ProductDtos.GetByIdAsync(product.Id);
+                // Add ALL matching products for admin to choose from
+                foreach (var product in products)
+                {
+                    var productDto = helperProductDtos.FirstOrDefault(x => x.Id == product.Id);
 
                     if (productDto == null)
                     {
@@ -450,23 +620,39 @@ Output: [{""product"":""narancs"",""quantity"":200,""unit"":""kg""},{""product""
                     var availableQuantity = product.StockQuantity + productDto.IncomingQuantity;
                     if (availableQuantity <= 0)
                     {
-                    Console.WriteLine($"[VoiceOrder] Product {product.Name} has no stock");
+                        Console.WriteLine($"[VoiceOrder] Product {product.Name} has no stock - skipping");
                         continue;
                     }
 
-                // Add to enriched list
+                    // Validate requested quantity against available stock
+                    var requestedQuantity = parsed.Quantity;
+                    var finalQuantity = requestedQuantity;
+                    var isQuantityReduced = false;
+
+                    if (requestedQuantity > availableQuantity)
+                    {
+                        Console.WriteLine($"[VoiceOrder] WARNING: Product {product.Name} - Requested {requestedQuantity} but only {availableQuantity} available. Capping to available.");
+                        finalQuantity = availableQuantity;
+                        isQuantityReduced = true;
+                    }
+
+                    // Add to enriched list with validated quantity
                     enrichedProducts.Add(new
                     {
                         id = product.Id,
                         name = product.Name,
                         sku = product.Sku,
-                    quantity = parsed.Quantity,
+                        quantity = finalQuantity, // Use validated quantity (capped to available)
-                    unit = parsed.Unit,
+                        requestedQuantity = requestedQuantity, // Original requested amount
                         price = product.Price,
-                    stockQuantity = availableQuantity
+                        stockQuantity = availableQuantity,
+                        searchTerm = parsed.Product, // Track what was searched for
+                        isQuantityReduced = isQuantityReduced // Flag if we had to reduce
                     });
                 }
+            }
 
+            Console.WriteLine($"[VoiceOrder] Total enriched products to display: {enrichedProducts.Count}");
             return enrichedProducts;
         }
 
@@ -476,9 +662,11 @@ Output: [{""product"":""narancs"",""quantity"":200,""unit"":""kg""},{""product""
 
         private class ParsedProduct
         {
+            [System.Text.Json.Serialization.JsonPropertyName("product")]
             public string Product { get; set; }
+
+            [System.Text.Json.Serialization.JsonPropertyName("quantity")]
             public int Quantity { get; set; }
-            public string Unit { get; set; }
         }
 
         #endregion

Nop.Plugin.Misc.AIPlugin/Controllers/FruitBankDataController.cs

@@ -365,6 +365,13 @@ namespace Nop.Plugin.Misc.FruitBankPlugin.Controllers
             _logger.Detail($"AddShippingDocument invoked; id: {shippingDocument.Id}");
 
             await ctx.ShippingDocuments.InsertAsync(shippingDocument);
+
+            foreach (var item in shippingDocument.ShippingItems)
+            {
+                var product = await ctx.Products.GetByIdAsync(item.ProductId);
+                product.ProductCost = Convert.ToDecimal(item.UnitPriceOnDocument);
+            }
+
             return await ctx.ShippingDocuments.GetByIdAsync(shippingDocument.Id, shippingDocument.Shipping != null || shippingDocument.Partner != null);
         }
 

Nop.Plugin.Misc.AIPlugin/Services/OpenAIApiService.cs

@@ -53,8 +53,9 @@ namespace Nop.Plugin.Misc.FruitBankPlugin.Services
         /// <param name="audioStream">The audio file stream</param>
         /// <param name="fileName">The original filename (used to determine format)</param>
         /// <param name="language">Optional language code (e.g., "en", "hu"). If null, auto-detects.</param>
+        /// <param name="customPrompt">Optional vocabulary hints to help Whisper recognize specific words/names</param>
         /// <returns>The transcribed text</returns>
-        public async Task<string?> TranscribeAudioAsync(Stream audioStream, string fileName, string? language = null)
+        public async Task<string?> TranscribeAudioAsync(Stream audioStream, string fileName, string? language = null, string? customPrompt = null)
         {
             try
             {
@@ -88,6 +89,22 @@ namespace Nop.Plugin.Misc.FruitBankPlugin.Services
                     form.Add(new StringContent(language), "language");
                 }
 
+                // Add prompt with vocabulary hints for better transcription
+                // Use custom prompt if provided, otherwise use default produce vocabulary
+                var prompt = customPrompt ?? 
+                    "Gyümölcsök és zöldségek: narancs, mandarin, citrom, alma, körte, szőlő, datolya, áfonya, " +
+                    "paprika, fokhagyma, hagyma, paradicsom, uborka, saláta, menta, bazsalikom, " +
+                    "mennyiségek: rekesz, láda, kilogram, darab";
+                
+                // Truncate prompt if too long (Whisper has a limit)
+                if (prompt.Length > 224)
+                {
+                    prompt = prompt.Substring(0, 224);
+                    Console.WriteLine($"[Whisper] Prompt truncated to 224 characters");
+                }
+                
+                form.Add(new StringContent(prompt), "prompt");
+
                 // Optional: Add response format (json is default, can also be text, srt, verbose_json, or vtt)
                 form.Add(new StringContent("json"), "response_format");
 
@@ -806,7 +823,8 @@ namespace Nop.Plugin.Misc.FruitBankPlugin.Services
                     "'name' (string), " +
                     "'quantity' (int - the number of cartons, boxes or packages), " +
                     "'netWeight' (double - the net kilograms), " +
-                    "'grossWeight' (double - the gross kilograms).\r \n \n" +
+                    "'grossWeight' (double - the gross kilograms)," +
+                    "'unitCost (double - the unit price of the product on the document)'.\r \n \n" +
                     "";
 
                 string systemPrompt = "You are an AI assistant of FRUITBANK that extracts text and structured data from images. " +