feat(backend): complete AI and business migration

server/ai/provider.ts

@@ -0,0 +1,80 @@
+import "server-only";
+
+import { createGoogleGenerativeAI } from "@ai-sdk/google";
+import { createGroq } from "@ai-sdk/groq";
+import { createOpenAI } from "@ai-sdk/openai";
+import type { LanguageModel } from "ai";
+import { getServerConfig } from "../config";
+import type { DomainActor } from "../domain/actor";
+import { DomainError } from "../domain/errors";
+import { getAiRuntimeSettings } from "../settings/ai";
+
+const defaultModels = {
+  gemini: "gemini-1.5-pro-latest",
+  groq: "llama-3.1-8b-instant",
+  openai: "gpt-4o",
+  ollama: "llama3.2",
+} as const;
+
+export type AiRuntime = {
+  model: LanguageModel;
+  provider: keyof typeof defaultModels;
+  modelName: string;
+  timeout: number;
+};
+
+export function getAiRuntime(actor: DomainActor): AiRuntime {
+  const settings = getAiRuntimeSettings(actor);
+  const modelName = settings.model ?? defaultModels[settings.provider];
+  const config = getServerConfig();
+
+  if (settings.provider !== "ollama" && !settings.apiKey) {
+    throw new DomainError(
+      "VALIDATION_ERROR",
+      "Ayarlardan bir AI sağlayıcısı ve API anahtarı seçmelisiniz.",
+    );
+  }
+
+  let model: LanguageModel;
+  switch (settings.provider) {
+    case "gemini":
+      model = createGoogleGenerativeAI({ apiKey: settings.apiKey ?? "" })(modelName);
+      break;
+    case "groq":
+      model = createGroq({ apiKey: settings.apiKey ?? "" })(modelName);
+      break;
+    case "ollama":
+      model = createOpenAI({
+        apiKey: "ollama",
+        baseURL: config.ollamaBaseUrl,
+      })(modelName);
+      break;
+    default:
+      model = createOpenAI({ apiKey: settings.apiKey ?? "" })(modelName);
+  }
+
+  return {
+    model,
+    provider: settings.provider,
+    modelName,
+    timeout: config.aiRequestTimeoutMs,
+  };
+}
+
+export function normalizeAiError(error: unknown): DomainError {
+  if (error instanceof DomainError) return error;
+
+  const name = error instanceof Error ? error.name : "";
+  if (name === "AbortError" || name === "TimeoutError") {
+    return new DomainError(
+      "UPSTREAM_TIMEOUT",
+      "AI sağlayıcısı zamanında yanıt vermedi. Lütfen tekrar deneyin.",
+    );
+  }
+
+  console.error("AI provider request failed", error);
+  return new DomainError(
+    "UPSTREAM_ERROR",
+    "AI sağlayıcısına ulaşılamadı. Sağlayıcı ayarlarını kontrol edip tekrar deneyin.",
+  );
+}