app.py

import gradio as gr
from huggingface_hub import InferenceClient

import pickle
import faiss
import numpy as np
import torch
import os
from transformers import AutoTokenizer, AutoModel
from openai import OpenAI
from dotenv import load_dotenv


load_dotenv()
api = os.getenv("OPENAI_API_KEY")
client = OpenAI(api_key=api)

# Load IndoLegalBERT
tokenizer = AutoTokenizer.from_pretrained("archi-ai/Indo-LegalBERT")
model = AutoModel.from_pretrained("archi-ai/Indo-LegalBERT")

# Pooling dengan mean pooling
def get_embedding(text):
    inputs = tokenizer(text, return_tensors="pt", truncation=True, max_length=512, padding="max_length")
    with torch.no_grad():
        outputs = model(**inputs)
        last_hidden = outputs.last_hidden_state
        mask = inputs["attention_mask"].unsqueeze(-1).expand(last_hidden.size()).float()
        masked = last_hidden * mask
        summed = torch.sum(masked, 1)
        counts = torch.clamp(mask.sum(1), min=1e-9)
        mean_pooled = summed / counts
        return mean_pooled.squeeze().numpy()

# Generate all embeddings
embeddings = np.array([get_embedding(text) for text in texts])


# 5. Simpan ke FAISS
dimension = embeddings.shape[1]
index = faiss.IndexFlatL2(dimension)
index.add(embeddings)

# 6. Simpan FAISS index dan metadata
faiss.write_index(index, "legal_index.faiss")
with open("legal_metadata.pkl", "wb") as f:
    pickle.dump(titles, f)

# 2. Load FAISS index dan metadata
index = faiss.read_index("legal_index.faiss")
with open("legal_metadata.pkl", "rb") as f:
    metadata = pickle.load(f)

# 4. Fungsi pencarian pasal hukum terkait
def search_laws(query, top_k=3):
    vec = get_embedding(query).reshape(1, -1)
    D, I = index.search(vec, top_k)
    results = []
    for i in I[0]:
        if i < len(metadata):
            results.append(f"- {metadata[i]}\n{texts[i]}")
    return results

# 5. Fungsi untuk membentuk prompt ke OpenAI
def build_prompt(query, contexts):
    context_text = "\n\n".join(contexts)
    return f"""
Anda adalah asisten hukum berbasis hukum Indonesia.

Permintaan pengguna:
\"{query}\"

Gunakan konteks hukum berikut:
{context_text}

Berikan penjelasan hukum yang sistematis dan profesional. Sebutkan pasal hukum jika ada.
"""

# 6. Fungsi untuk interaksi LLM (pakai GPT-3.5 Turbo)
openai.api_key = "YOUR_OPENAI_API_KEY"  # <- Ganti dengan API key milikmu

def ask_llm(query):
    contexts = search_laws(query)
    prompt = build_prompt(query, contexts)

    response = client.chat.completions.create(
        model="gpt-3.5-turbo",
        messages=[
            {"role": "system", "content": "Anda adalah ahli hukum Indonesia."},
            {"role": "user", "content": prompt}
        ],
        temperature=0.2,
       # max_tokens=512,
    )
    return response.choices[0].message.content

# Gradio UI
# Fungsi simulasi RAG Legal Agent
def rag_legal_analysis(document_text, issue_type):
    if issue_type == "Analisis Syarat Sah Perjanjian":
        return ask_llm(document_text)
    elif issue_type == "Deteksi Klausul Bermasalah":
        return ask_llm(document_text)
    elif issue_type == "Risiko Hukum Pihak Tertentu":
        return ask_llm(document_text)
    else:
        return "Silakan pilih jenis analisis hukum yang ingin dilakukan."

# Gradio UI
with gr.Blocks(title="Naraya Smart Legal Assitant") as demo:
    gr.Markdown("# 🤖 Naraya Smart Legal Assitant")
    gr.Markdown("Masukkan isi perjanjian atau kontrak, lalu pilih jenis analisis hukum.")

    document_input = gr.Textbox(
                        label="Isi Dokumen Kontrak", 
                        lines=10, 
                        placeholder="Masukkan isi kontrak di sini atau upload dokumen")
        #document_input = gr.MultimodalTextbox(
         #               interactive=True, 
          #              label="Isi Dokumen Kontrak", 
           #             lines=10, 
            #            placeholder="Masukkan isi kontrak di sini atau upload dokumen")
    issue_type = gr.Radio(
        label="Jenis Analisis Hukum",
        choices=[
            "Analisis Syarat Sah Perjanjian",
            "Deteksi Klausul Bermasalah",
            "Risiko Hukum Pihak Tertentu"
        ]
    )
    output = gr.Textbox(label="Hasil Analisis Hukum", lines=20)

    analyze_button = gr.Button("🔍 Analisa Sekarang")
    analyze_button.click(fn=rag_legal_analysis, inputs=[document_input, issue_type], outputs=output)    


if __name__ == "__main__":
    demo.launch()