feat: ai letter + disabled fl

app/ai.py

@@ -0,0 +1,80 @@
+from __future__ import annotations
+
+import asyncio
+from pathlib import Path
+
+import requests
+
+from app.models import Offer
+
+
+class OfferReplyGenerator:
+    def __init__(
+        self,
+        api_base_url: str,
+        api_key: str,
+        model: str,
+        system_prompt_file: Path,
+        timeout_seconds: int,
+    ) -> None:
+        self._api_base_url = api_base_url.rstrip("/")
+        self._api_key = api_key
+        self._model = model
+        self._system_prompt = system_prompt_file.read_text(encoding="utf-8").strip()
+        self._timeout_seconds = timeout_seconds
+
+    async def generate_reply(self, offer: Offer) -> str:
+        return await asyncio.to_thread(self._generate_reply_sync, offer)
+
+    def _generate_reply_sync(self, offer: Offer) -> str:
+        response = requests.post(
+            f"{self._api_base_url}/chat/completions",
+            headers={
+                "Authorization": f"Bearer {self._api_key}",
+                "Content-Type": "application/json",
+            },
+            json={
+                "model": self._model,
+                "messages": [
+                    {"role": "system", "content": self._system_prompt},
+                    {"role": "user", "content": _build_offer_prompt(offer)},
+                ],
+            },
+            timeout=self._timeout_seconds,
+        )
+        response.raise_for_status()
+        payload = response.json()
+        choices = payload.get("choices") or []
+        if not choices:
+            raise ValueError("OpenAI-compatible API returned no choices")
+
+        message = choices[0].get("message") or {}
+        content = message.get("content")
+        if isinstance(content, str) and content.strip():
+            return content.strip()
+
+        if isinstance(content, list):
+            text_parts = [item.get("text", "") for item in content if isinstance(item, dict)]
+            text = "\n".join(part.strip() for part in text_parts if part and part.strip()).strip()
+            if text:
+                return text
+
+        raise ValueError("OpenAI-compatible API returned empty content")
+
+
+def _build_offer_prompt(offer: Offer) -> str:
+    seller_line = f"Исполнитель: @{offer.seller_username}\n" if offer.seller_username else ""
+    price_amount_line = f"Числовой бюджет: {offer.price_amount}\n" if offer.price_amount is not None else ""
+    return (
+        f"Подготовь сообщение для отклика на этот оффер.\n"
+        f"Источник: {offer.source}\n"
+        f"ID: {offer.external_id}\n"
+        f"Заголовок: {offer.title}\n"
+        f"Категория: {offer.category_id}\n"
+        f"Бюджет: {offer.price}\n"
+        f"{price_amount_line}"
+        f"Опубликовано: {offer.published_at}\n"
+        f"{seller_line}"
+        f"Описание:\n{offer.description}\n\n"
+        f"Ссылка: {offer.url}"
+    )