fix: update uri to omit deployment ids for assistant and thread paths

lib/openai/http.rb

@@ -86,13 +86,24 @@ def conn(multipart: false)
 
     def uri(path:)
       if azure?
-        base = File.join(@uri_base, path)
-        "#{base}?api-version=#{@api_version}"
+        azure_uri(path)
       else
         File.join(@uri_base, @api_version, path)
       end
     end
 
+    def azure_uri(path)
+      base = File.join(@uri_base, path)
+
+      # Remove the deployment to support assistants for azure
+      if path.include?("/assistants") || path.include?("/threads")
+        base = base.gsub(%r{/deployments/.+/},
+                         "/")
+      end
+
+      "#{base}?api-version=#{@api_version}"
+    end
+
     def multipart_parameters(parameters)
       parameters&.transform_values do |value|
         next value unless value.respond_to?(:close) # File or IO object.

spec/openai/client/http_spec.rb

@@ -239,6 +239,12 @@
         let(:uri_base) { "https://custom-domain.openai.azure.com/openai/deployments/gpt-35-turbo" }
         it { expect(uri).to eq("https://custom-domain.openai.azure.com/openai/deployments/gpt-35-turbo/chat?api-version=v1") }
       end
+
+      context "with assistants" do
+        let(:path) { "/assistants" }
+        let(:uri_base) { "https://custom-domain.openai.azure.com/openai/deployments/gpt-35-turbo" }
+        it { expect(uri).to eq("https://custom-domain.openai.azure.com/openai/assistants?api-version=v1") }
+      end
     end
   end