feat: implement parameter cleaning for Gemini functions

relay/channel/gemini/relay-gemini.go

@@ -56,6 +56,7 @@ func CovertGemini2OpenAI(textRequest dto.GeneralOpenAIRequest) (*GeminiChatReque
 				continue
 			}
 			if tool.Function.Parameters != nil {
+
 				params, ok := tool.Function.Parameters.(map[string]interface{})
 				if ok {
 					if props, hasProps := params["properties"].(map[string]interface{}); hasProps {
@@ -65,6 +66,9 @@ func CovertGemini2OpenAI(textRequest dto.GeneralOpenAIRequest) (*GeminiChatReque
 					}
 				}
 			}
+			// Clean the parameters before appending
+			cleanedParams := cleanFunctionParameters(tool.Function.Parameters)
+			tool.Function.Parameters = cleanedParams
 			functions = append(functions, tool.Function)
 		}
 		if codeExecution {
@@ -86,11 +90,11 @@ func CovertGemini2OpenAI(textRequest dto.GeneralOpenAIRequest) (*GeminiChatReque
 		// json_data, _ := json.Marshal(geminiRequest.Tools)
 		// common.SysLog("tools_json: " + string(json_data))
 	} else if textRequest.Functions != nil {
-		geminiRequest.Tools = []GeminiChatTool{
+		//geminiRequest.Tools = []GeminiChatTool{
-			{
+		//	{
-				FunctionDeclarations: textRequest.Functions,
+		//		FunctionDeclarations: textRequest.Functions,
-			},
+		//	},
-		}
+		//}
 	}
 
 	if textRequest.ResponseFormat != nil && (textRequest.ResponseFormat.Type == "json_schema" || textRequest.ResponseFormat.Type == "json_object") {
@@ -229,6 +233,96 @@ func CovertGemini2OpenAI(textRequest dto.GeneralOpenAIRequest) (*GeminiChatReque
 	return &geminiRequest, nil
 }
 
+
+// cleanFunctionParameters recursively removes unsupported fields from Gemini function parameters.
+func cleanFunctionParameters(params interface{}) interface{} {
+	if params == nil {
+		return nil
+	}
+
+	paramMap, ok := params.(map[string]interface{})
+	if !ok {
+		// Not a map, return as is (e.g., could be an array or primitive)
+		return params
+	}
+
+	// Create a copy to avoid modifying the original
+	cleanedMap := make(map[string]interface{})
+	for k, v := range paramMap {
+		cleanedMap[k] = v
+	}
+
+	// Clean properties
+	if props, ok := cleanedMap["properties"].(map[string]interface{}); ok && props != nil {
+		cleanedProps := make(map[string]interface{})
+		for propName, propValue := range props {
+			propMap, ok := propValue.(map[string]interface{})
+			if !ok {
+				cleanedProps[propName] = propValue // Keep non-map properties
+				continue
+			}
+
+			// Create a copy of the property map
+			cleanedPropMap := make(map[string]interface{})
+			for k, v := range propMap {
+				cleanedPropMap[k] = v
+			}
+
+			// Remove unsupported fields
+			delete(cleanedPropMap, "default")
+			delete(cleanedPropMap, "exclusiveMaximum")
+			delete(cleanedPropMap, "exclusiveMinimum")
+
+			// Check and clean 'format' for string types
+			if propType, typeExists := cleanedPropMap["type"].(string); typeExists && propType == "string" {
+				if formatValue, formatExists := cleanedPropMap["format"].(string); formatExists {
+					if formatValue != "enum" && formatValue != "date-time" {
+						delete(cleanedPropMap, "format")
+					}
+				}
+			}
+
+			// Recursively clean nested properties within this property if it's an object/array
+			// Check the type before recursing
+			if propType, typeExists := cleanedPropMap["type"].(string); typeExists && (propType == "object" || propType == "array") {
+				cleanedProps[propName] = cleanFunctionParameters(cleanedPropMap)
+			} else {
+				cleanedProps[propName] = cleanedPropMap // Assign the cleaned map back if not recursing
+			}
+
+		}
+		cleanedMap["properties"] = cleanedProps
+	}
+
+	// Recursively clean items in arrays if needed (e.g., type: array, items: { ... })
+	if items, ok := cleanedMap["items"].(map[string]interface{}); ok && items != nil {
+		cleanedMap["items"] = cleanFunctionParameters(items)
+	}
+	// Also handle items if it's an array of schemas
+	if itemsArray, ok := cleanedMap["items"].([]interface{}); ok {
+		cleanedItemsArray := make([]interface{}, len(itemsArray))
+		for i, item := range itemsArray {
+			cleanedItemsArray[i] = cleanFunctionParameters(item)
+		}
+		cleanedMap["items"] = cleanedItemsArray
+	}
+
+
+	// Recursively clean other schema composition keywords if necessary
+	for _, field := range []string{"allOf", "anyOf", "oneOf"} {
+		if nested, ok := cleanedMap[field].([]interface{}); ok {
+			cleanedNested := make([]interface{}, len(nested))
+			for i, item := range nested {
+				cleanedNested[i] = cleanFunctionParameters(item)
+			}
+			cleanedMap[field] = cleanedNested
+		}
+	}
+
+	return cleanedMap
+}
+
+
 func removeAdditionalPropertiesWithDepth(schema interface{}, depth int) interface{} {
 	if depth >= 5 {
 		return schema