import os
import requests
from utils import log

class LLMConnector:
    def __init__(self, service_config):
        self.service_config = service_config

    def call_spark(self, project_name, prompt, chat_history):
        project = self.service_config.get_project(project_name)
        if not project:
            raise Exception(f"Project not found: {project_name}")

        llm_config = project.get("llm", {})
        if not llm_config:
            raise Exception(f"LLM config missing for project: {project_name}")

        spark_url = self.service_config.llm_inference_service_url
        work_mode = self.service_config.work_mode
        cloud_token = self.service_config.get_auth_token()

        headers = {
            "Authorization": f"Bearer {cloud_token}",
            "Content-Type": "application/json"
        }

        payload = {
            "work_mode": work_mode,
            "cloud_token": cloud_token,
            "project_name": project_name,
            "project_version": project.get("project_version"),
            "repo_id": llm_config.get("repo_id"),
            "generation_config": llm_config.get("generation_config"),
            "use_fine_tune": llm_config.get("use_fine_tune"),
            "fine_tune_zip": llm_config.get("fine_tune_zip"),
            "user_input": chat_history[-1]["content"] if chat_history else "",
            "system_prompt": prompt,
            "context": chat_history
        }

        try:
            log(f"🚀 Sending request to Spark for project: {project_name}")
            response = requests.post(f"{spark_url}/generate", json=payload, headers=headers, timeout=60)
            response.raise_for_status()
            result = response.json()
            log("✅ Spark response received successfully.")
            return result.get("model_answer")
        except Exception as e:
            log(f"❌ Spark microservice error: {e}")
            return None