_utils/utils.py

from langchain_community.document_loaders import PyPDFLoader
import os
from langchain_openai import ChatOpenAI
from langchain_chroma import Chroma
from langchain_text_splitters import RecursiveCharacterTextSplitter
from langchain.chains.combine_documents import create_stuff_documents_chain
from langchain_core.prompts import ChatPromptTemplate
from langchain_huggingface import HuggingFaceEndpoint, HuggingFaceEmbeddings
from setup.environment import default_model
from uuid import uuid4
from langchain_core.output_parsers import JsonOutputParser
from langchain_core.pydantic_v1 import BaseModel, Field
from typing import List
import numpy as np
import openai
import pandas as pd

os.environ["LANGCHAIN_TRACING_V2"]="true"
os.environ["LANGCHAIN_ENDPOINT"]="https://api.smith.langchain.com"
os.environ.get("LANGCHAIN_API_KEY")
os.environ["LANGCHAIN_PROJECT"]="VELLA"
os.environ.get("OPENAI_API_KEY")
os.environ.get("HUGGINGFACEHUB_API_TOKEN")
embeddings_model = HuggingFaceEmbeddings(model_name="sentence-transformers/all-mpnet-base-v2")

allIds = []

def getPDF(file_paths):
  documentId = 0
  text_splitter = RecursiveCharacterTextSplitter(chunk_size=1000, chunk_overlap=200)
  pages = []
  for file in file_paths:
    loader = PyPDFLoader(file, extract_images=False)
    pagesDoc = loader.load_and_split(text_splitter)
    pages = pages + pagesDoc
    
  for page in pages:
    documentId = str(uuid4())
    allIds.append(documentId)
    page.id = documentId
  return pages

def create_retriever(documents, vectorstore):
  print('\n\n')
  print('documents: ', documents[:2])

  vectorstore.add_documents(documents=documents)

  retriever = vectorstore.as_retriever(
      # search_type="similarity",
      # search_kwargs={"k": 3},
  )
  
  return retriever

def create_prompt_llm_chain(system_prompt, modelParam):
  model = create_llm(modelParam)

  system_prompt = system_prompt + "\n\n" + "{context}"
  prompt = ChatPromptTemplate.from_messages(
      [
          ("system", system_prompt),
          ("human", "{input}"),
      ]
  )
  question_answer_chain = create_stuff_documents_chain(model, prompt)
  return question_answer_chain

def create_llm(modelParam):
  if modelParam == default_model:
    return ChatOpenAI(model=modelParam, max_tokens=16384)
  else:
    return HuggingFaceEndpoint(
        repo_id=modelParam,
        task="text-generation",
        max_new_tokens=1100,
        do_sample=False,
        huggingfacehub_api_token=os.environ.get("HUGGINGFACEHUB_API_TOKEN")
    )


class Resumo(BaseModel):
    nome_do_memorial: str = Field()
    argumentos: str = Field()
    jurisprudencia: str = Field()
    doutrina: str = Field()
    palavras_chave: List[str] = Field()

def create_prompt_llm_chain_summary(system_prompt, model_param):
  prompt_and_llm = create_prompt_and_llm(system_prompt, model_param)

  question_answer_chain = create_stuff_documents_chain(prompt_and_llm["model"], prompt_and_llm["prompt"])
  final_chain = question_answer_chain | JsonOutputParser(pydantic_object=Resumo)
  return final_chain

def process_embedding_summary(system_prompt, model_param, full_text):
  prompt_and_llm = create_prompt_and_llm(system_prompt, model_param)
  
  text_splitter=RecursiveCharacterTextSplitter(chunk_size=2000, chunk_overlap=200)
  docs = text_splitter.create_documents([full_text])
  embeddings=get_embeddings([doc.page_content for doc in docs])
  
  content_list = [doc.page_content for doc in docs]
  df = pd.DataFrame(content_list, columns=['page_content'])
  vectors = [embedding.embedding for embedding in embeddings]
  array = np.array(vectors)
  embeddings_series = pd.Series(list(array))
  df['embeddings'] = embeddings_series


def get_embeddings(text):
  response = openai.embeddings.create(
      model="text-embedding-3-small",
      input=text
  )
  return response.data

def create_prompt_and_llm(system_prompt, model_param):
  model = create_llm(model_param)
  
  system_prompt = system_prompt + "\n\n" + "{context}"
  prompt = ChatPromptTemplate.from_messages(
      [
          ("system", system_prompt),
          ("human", "{input}"),
      ]
  )
  return {"model": model, "prompt": prompt}

DEFAULT_SYSTEM_PROMPT = """

You are a highly knowledgeable legal assistant specializing in case summarization. Your task is to provide comprehensive and accurate summaries of legal cases while maintaining a professional and objective demeanor. Always approach each case with careful consideration and analytical rigor.

First, you will be given a document to analyze:

Next, you will summarize a content provided.

Before providing your summary, follow these steps:

1. Argumentation Mining: Conduct a cross-Document Argument Analysis to identify the main arguments, claims, and supporting evidence within the document. Focus on extracting the most relevant information related to the summary request.

2. Socratic Questioning: Reflect on your initial findings using the Socratic method. Ask yourself probing questions to challenge your assumptions and deepen your understanding of the document's content. For example:
 - What are the key points I've identified?
 - Are there any counterarguments or alternative perspectives I've overlooked?
 - How does this information relate to the specific summary request?
 - What additional context might be necessary to fully understand these points?

3. Maximal Marginal Relevance: Apply the principles of Maximal Marginal Relevance to ensure your summary includes diverse, relevant information while avoiding redundancy. Prioritize information that is both relevant to the summary request and adds new insights not already covered.

After completing these steps, generate the response with around 10000 characteres in BBcode format, as shown below: 

Example: :

{{
  "nome_do_memorial": "[Insira aqui o nome do memorial e número da equipe] ",
  
  "argumentos": "
  [b]Argumento 1:[/b] 
  Fundamento 1.1: [Descreva o fundamento de forma extensa e completa] 
  Fundamento 1.2: [Descreva o fundamento de forma extensa e completa] 
  [b]Argumento 2:[/b] 
  Fundamento 2.1: [Descreva o fundamento de forma extensa e completa] 
  Fundamento 2.2: [Descreva o fundamento de forma extensa e completa]",
  
  "jurisprudencia": "
  [b]Caso 1:[/b] [Nome e referência do caso] [i]Resumo:[/i] [Descrição extensa de como a jurisprudência se aplica] 
  [b]Caso 2:[/b] [Nome e referência do caso] [i]Resumo:[/i] [Descrição extensa de como a jurisprudência se aplica]",
  
  "doutrina": "
  [b]Autor 1:[/b] [Nome do autor] 
  "[Título da obra]" [i]Resumo:[/i] [Resumo da posição do autor] 
  [b]Autor 2:[/b] [Nome do autor] 
  "[Título da obra]" [i]Resumo:[/i] [Resumo da posição do autor]",
  
  "palavras-chave": "
  [Palavra-chave 1] 
  [Palavra-chave 2] 
  [Palavra-chave 3] 
  [Adicione outras palavras relevantes]"
}}


Remember:
- Always prioritize relevance to the summary request.
- Ensure your summary is well-structured and easy to understand.
- Do not include any personal opinions or information not present in the original document.
- If the summary request asks for a specific focus or perspective, make sure to address it directly.

Your goal is to provide a comprehensive yet concise summary that accurately represents the document's content while meeting the specific needs outlined in the summary request.

Do not pass in the response part of the instructions that you received
Generate the response with at least 10000 characteres
The content to be summarized is as follows:
"""