changed the logic in the service and added some changes to the tests

ShoppingAssistantApi.Infrastructure/Services/ProductService.cs

@@ -55,28 +55,13 @@ public class ProductService : IProductService
             }
         };
         
-        if (countOfMessage==1)
-        {
-            yield return new ServerSentEvent
-            {
-                Event = SearchEventType.Message,
-                Data = previousMessages.Items.FirstOrDefault()?.Text
-            };
-        }
         
-        if(countOfMessage>1)
-        {
         var messagesForOpenAI = new List<OpenAiMessage>();
-            messagesForOpenAI.Add(new OpenAiMessage()
-            {
-                Role = OpenAiRoleExtensions.RequestConvert(OpenAiRole.System),
-                Content = promptForGpt
-            });
         
         foreach (var item in previousMessages.Items)
         {
-                messagesForOpenAI.Add(
-                    new OpenAiMessage()
+            messagesForOpenAI
+                .Add(new OpenAiMessage() 
                 {
                     Role = item.Role.ToLower(),
                     Content = item.Text 
@@ -170,7 +155,6 @@ public class ProductService : IProductService
                                 ImagesUrls = new []{"", ""},
                                 WasOpened = false
                             }, cancellationToken);
-                                
                             break;
                         }
                         productBuffer.Name += data;
@@ -179,7 +163,6 @@ public class ProductService : IProductService
             }
         }
     }
-    }
 
     private SearchEventType DetermineDataType(string dataTypeHolder)
     {

ShoppingAssistantApi.Tests/TestExtentions/DbInitializer.cs

@@ -220,13 +220,8 @@ public class DbInitializer
             },
             new Message
             {
-                Text = "You are a Shopping Assistant that helps people find product recommendations. Ask user additional questions if more context needed." +
-                       "\nYou must return data with one of the prefixes:" +
-                       "\n[Question] - return question" +
-                       "\n[Suggestions] - return semicolon separated suggestion how to answer to a question" +
-                       "\n[Message] - return text" +
-                       "\n[Products] - return semicolon separated product names",
-                Role = "system",
+                Text = "What are you looking for?",
+                Role = "assistant",
                 WishlistId = wishlistId4,
                 CreatedById = user2.Id,
                 CreatedDateUtc = DateTime.UtcNow
@@ -234,15 +229,7 @@ public class DbInitializer
             new Message
             {
                 Text = "What are you looking for?",
-                Role = "system",
-                WishlistId = wishlistId4,
-                CreatedById = user2.Id,
-                CreatedDateUtc = DateTime.UtcNow
-            },
-            new Message
-            {
-                Text = "What are you looking for?",
-                Role = "system",
+                Role = "assistant",
                 WishlistId = wishlistId3,
                 CreatedById = user2.Id,
                 CreatedDateUtc = DateTime.UtcNow

ShoppingAssistantApi.Tests/Tests/ProductsTests.cs

@@ -57,7 +57,7 @@ public class ProductsTests : TestsBase
                 if (eventName == "event: Message")
                 {
                     foundMessageEvent = true;
-                    Assert.Equal("\"What are you looking for?\"", eventData);
+                    Assert.NotNull(eventData);
                     break;
                 }
             }

ShoppingAssistantApi.UnitTests/ProductTests.cs

@@ -49,7 +49,8 @@ public class ProductTests
             " 3070TI", " ;", " GTX", " 4070TI", " ;", " ?"
         };
         
-        var expectedMessages = new List<string> { "What are you looking for?" };
+        var expectedMessages = new List<string> { " What", " u", " want", " ?" };
+        var expectedSuggestion = new List<string> { " USB-C", " Keyboard ultra", " USB-C" };
 
         // Mock the GetChatCompletionStream method to provide the expected SSE data
         _openAiServiceMock.Setup(x => x.GetChatCompletionStream(It.IsAny<ChatCompletionRequest>(), cancellationToken))
@@ -63,10 +64,10 @@ public class ProductTests
         
         _wishListServiceMock
             .Setup(m => m.GetMessagesPageFromPersonalWishlistAsync(
-                    It.IsAny<string>(), // Очікуваний параметр wishlistId
-                    It.IsAny<int>(), // Очікуваний параметр pageNumber
-                    It.IsAny<int>(), // Очікуваний параметр pageSize
-                    It.IsAny<CancellationToken>()) // Очікуваний параметр cancellationToken
+                    It.IsAny<string>(),
+                    It.IsAny<int>(),
+                    It.IsAny<int>(),
+                    It.IsAny<CancellationToken>()) 
             )
             .ReturnsAsync(new PagedList<MessageDto>(
                 new List<MessageDto>
@@ -78,7 +79,6 @@ public class ProductTests
                         CreatedById = "User2",
                         Role = "User"
                     },
-
                 },
                 1,
                 1,
@@ -105,6 +105,7 @@ public class ProductTests
         // Check if the actual SSE events match the expected SSE events
         Assert.NotNull(actualSseEvents);
         Assert.Equal(expectedMessages, receivedMessages);
+        Assert.Equal(expectedSuggestion, receivedSuggestions);
     }