import torch
from transformers import AutoTokenizer, AutoModelForCausalLM
from rag.search import search_context
import os

BASE_DIR = os.path.dirname(os.path.dirname(__file__))

MODEL_PATH = os.path.join(BASE_DIR, "model", "final")

tokenizer = AutoTokenizer.from_pretrained(
    MODEL_PATH,
    local_files_only=True,
    trust_remote_code=True,
    fix_mistral_regex=True
)

model = AutoModelForCausalLM.from_pretrained(
    MODEL_PATH,
    local_files_only=True,
    trust_remote_code=True,
    device_map="auto",
    dtype=torch.float16
)


def analyze(user_input: str):
    context = search_context(user_input)

    prompt = f"""
You are a cybersecurity malware analysis assistant.
Respond ONLY in valid JSON.
Use these fields exactly once:
- reasoning (array of strings)
- indicators (array)
- confidence (float 0-1)
- recommendation (string)
- mitre_attack (array)

Context:
{context}

Input:
{user_input}

Response:
"""

    inputs = tokenizer(prompt, return_tensors="pt").to(model.device)

    with torch.no_grad():
        output = model.generate(
            **inputs,
            max_new_tokens=256,
            do_sample=True,
            temperature=0.2,
            top_p=0.9
        )

    return tokenizer.decode(output[0], skip_special_tokens=True)