DEV: Use a simple validator

- no need for seeding checks or module dependant checks

Author: keegangeorge

config/settings.yml

@@ -16,7 +16,7 @@ discourse_ai:
     type: enum
     allow_any: false
     enum: "DiscourseAi::Configuration::LlmEnumerator"
-    validator: "DiscourseAi::Configuration::LlmValidator"
+    validator: "DiscourseAi::Configuration::SimpleLlmValidator"
 
   ai_sentiment_enabled:
     default: false

lib/configuration/simple_llm_validator.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+module DiscourseAi
+  module Configuration
+    class SimpleLlmValidator
+      def initialize(opts = {})
+        @opts = opts
+      end
+
+      def valid_value?(val)
+        return true if val == ""
+
+        run_test(val).tap { |result| @unreachable = result }
+      rescue StandardError => e
+        raise e if Rails.env.test?
+        @unreachable = true
+        true
+      end
+
+      def run_test(val)
+        DiscourseAi::Completions::Llm
+          .proxy(val)
+          .generate("How much is 1 + 1?", user: nil, feature_name: "llm_validator")
+          .present?
+      end
+
+      def error_message
+        return unless @unreachable
+
+        I18n.t("discourse_ai.llm.configuration.model_unreachable")
+      end
+    end
+  end
+end