helpers.py

from docx import Document
import json
import datetime
import tempfile
from pathlib import Path
from unidecode import unidecode
from langchain_community.document_loaders import JSONLoader, UnstructuredWordDocumentLoader, WebBaseLoader
from langchain_text_splitters import RecursiveCharacterTextSplitter, RecursiveJsonSplitter
from langchain_community.vectorstores import FAISS
from langchain_google_genai import GoogleGenerativeAIEmbeddings, ChatGoogleGenerativeAI
import google.generativeai as genai
from tqdm import tqdm
from pathlib import Path
import shutil
import requests
from bs4 import BeautifulSoup

async def get_urls_splits(url='https://nct.neu.edu.vn/', char='https://nct.neu.edu.vn/'):
    reqs = requests.get(url)
    soup = BeautifulSoup(reqs.text, 'html.parser')

    urls = []
    for link in soup.find_all('a', href=True):  # Chỉ lấy thẻ có 'href'
        href = link.get('href')
        if href.startswith(char):
            urls.append(href)
    return urls
    # docs = []
    # for page_url in url:
    #     loader = WebBaseLoader(web_paths=[page_url])
    #     async for doc in loader.alazy_load():
    #         docs.append(doc)

    #     assert len(docs) == 1
    #     # doc = docs[0]

    # return docs

# Ví dụ sử dụng
# nct_urls = get_nct_urls('https://nct.neu.edu.vn/')
# print(nct_urls)

def log_message(messages, filename="chat_log.txt"):
    """Ghi lịch sử tin nhắn vào file log"""
    with open(filename, "a", encoding="utf-8") as f:
        log_entry = {
            "timestamp": datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
            "conversation": messages
        }
        f.write(json.dumps(log_entry, ensure_ascii=False) + "\n")

def remove_tables_from_docx(file_path):
    """Tạo bản sao của file DOCX nhưng loại bỏ tất cả bảng bên trong."""
    doc = Document(file_path)
    new_doc = Document()

    for para in doc.paragraphs:
        new_doc.add_paragraph(para.text)

    # 📌 Lưu vào file tạm, đảm bảo đóng đúng cách
    with tempfile.NamedTemporaryFile(delete=False, suffix=".docx") as temp_file:
        temp_path = temp_file.name
        new_doc.save(temp_path)

    return temp_path  # ✅ Trả về đường dẫn file mới, không làm hỏng file gốc

def load_text_data(file_path):
    """Tải nội dung văn bản từ file DOCX (đã loại bảng)."""
    cleaned_file = remove_tables_from_docx(file_path)
    return UnstructuredWordDocumentLoader(cleaned_file).load()


def extract_tables_from_docx(file_path):
    doc = Document(file_path)
    tables = []
    all_paragraphs = [p.text.strip() for p in doc.paragraphs if p.text.strip()]  # Lấy tất cả đoạn văn bản không rỗng

    table_index = 0
    para_index = 0
    table_positions = []

    # Xác định vị trí của bảng trong tài liệu
    for element in doc.element.body:
        if element.tag.endswith("tbl"):
            table_positions.append((table_index, para_index))
            table_index += 1
        elif element.tag.endswith("p"):
            para_index += 1

    for idx, (table_idx, para_idx) in enumerate(table_positions):
        data = []
        for row in doc.tables[table_idx].rows:
            data.append([cell.text.strip() for cell in row.cells])

        if len(data) > 1:  # Chỉ lấy bảng có dữ liệu
            # Lấy 5 dòng trước và sau bảng
            related_start = max(0, para_idx - 5)
            related_end = min(len(all_paragraphs), para_idx + 5)
            related_text = all_paragraphs[related_start:related_end]
            tables.append({"table": idx + 1, "content": data, "related": related_text})
    return tables

def convert_to_json(tables):
    structured_data = {}

    for table in tables:
        headers = [unidecode(h) for h in table["content"][0]]  # Bỏ dấu ở headers
        rows = [[unidecode(cell) for cell in row] for row in table["content"][1:]]  # Bỏ dấu ở dữ liệu
        json_table = [dict(zip(headers, row)) for row in rows if len(row) == len(headers)]

        related_text = [unidecode(text) for text in table["related"]]  # Bỏ dấu ở văn bản liên quan

        structured_data[table["table"]] = {
            "content": json_table,
            "related": related_text
        }

    return json.dumps(structured_data, indent=4, ensure_ascii=False)


def save_json_to_file(json_data, output_path):
    with open(output_path, 'w', encoding='utf-8') as f:
        json.dump(json.loads(json_data), f, ensure_ascii=False, indent=4)

# def load_json_with_langchain(json_path):
#     loader = JSONLoader(file_path=json_path, jq_schema='.. | .content?', text_content=False)
#     data = loader.load()

#     # # Kiểm tra xem dữ liệu có bị lỗi không
#     # print("Sample Data:", data[:2])  # In thử 2 dòng đầu
#     return data

def load_json_manually(json_path):
    with open(json_path, 'r', encoding='utf-8') as f:
        data = json.load(f)
    return data

def load_table_data(file_path, output_json_path):
    tables = extract_tables_from_docx(file_path)
    json_output = convert_to_json(tables)
    save_json_to_file(json_output, output_json_path)

    table_data = load_json_manually(output_json_path)
    return table_data

def get_splits(file_path, output_json_path):
    table_data = load_table_data(file_path, output_json_path)
    text_data = load_text_data(file_path)

    # Chia nhỏ văn bản
    json_splitter = RecursiveJsonSplitter(max_chunk_size = 1000)
    text_splitter = RecursiveCharacterTextSplitter(chunk_size=1000, chunk_overlap=250)

    table_splits = json_splitter.create_documents(texts=[table_data])
    text_splits = text_splitter.split_documents(text_data)
    all_splits = table_splits + text_splits
    return all_splits

def get_json_splits_only(file_path):
    table_data = load_json_manually(file_path)

    def remove_accents(obj): #xoa dau tieng viet
        if isinstance(obj, str):
            return unidecode(obj)
        elif isinstance(obj, list):
            return [remove_accents(item) for item in obj]
        elif isinstance(obj, dict):
            return {remove_accents(k): remove_accents(v) for k, v in obj.items()}
        return obj

    cleaned_data = remove_accents(table_data)
    wrapped_data = {"data": cleaned_data} if isinstance(cleaned_data, list) else cleaned_data

    json_splitter = RecursiveJsonSplitter(max_chunk_size = 512)
    text_splitter = RecursiveCharacterTextSplitter(chunk_size=1000, chunk_overlap=250)

    table_splits = json_splitter.create_documents(texts=[wrapped_data])
    table_splits = text_splitter.split_documents(table_splits)

    return table_splits

def list_docx_files(folder_path):
    return [str(file) for file in Path(folder_path).rglob("*.docx")]

def prompt_order(queries):
    text = 'IMPORTANT: Here is the questions of user in order, use that and the context above to know the best answer:\n'
    i = 0
    for q in queries:
        i += 1
        text += f'Question {i}: {str(q)}\n'
    return text

# Define the augment_prompt function
def augment_prompt(query: str, k: int = 10):
    queries = []
    queries.append(query)

    retriever = vectorstore.as_retriever(search_kwargs={"k": k})
    results = retriever.invoke(query)

    if results:
        source_knowledge = "\n\n".join([doc.page_content for doc in results])
        return f"""Using the contexts below, answer the query.

Contexts:
{source_knowledge}

"""
    else:
        return f"No relevant context found.\n."

def get_answer(query, queries_list=None):
    if queries_list is None:
        queries_list = []

    messages = [
    {"role": "user", "parts": [{"text": "IMPORTANT: You are a super energetic, helpful, polite, Vietnamese-speaking assistant. If you can not see the answer in contexts, try to search it up online by yourself but remember to give the source."}]},
    {"role": "user", "parts": [{"text": augment_prompt(query)}]}
]
#     bonus = '''
# Bạn tham kháo thêm các nguồn thông tin tại:
# Trang thông tin điện tử: https://neu.edu.vn ; https://daotao.neu.edu.vn
# Trang mạng xã hội có thông tin tuyển sinh: https://www.facebook.com/ktqdNEU ; https://www.facebook.com/tvtsneu ;
# Email tuyển sinh: [email protected]
# Số điện thoại tuyển sinh: 0888.128.558
#   '''

    queries_list.append(query)
    queries = {"role": "user", "parts": [{"text": prompt_order(queries_list)}]}
    messages_with_queries = messages.copy()
    messages_with_queries.append(queries)
    # messages_with_queries.insert(0, queries)

  # Configure API key
    genai.configure(api_key=key)

  # Initialize the Gemini model
    model = genai.GenerativeModel("gemini-2.0-flash")

    response = model.generate_content(contents=messages_with_queries, stream=True)
    response_text = ""

    for chunk in response:
        response_text += chunk.text
        yield response_text

    messages.append({"role": "model", "parts": [{"text": response_text}]})

        # user_feedback = yield "\nNhập phản hồi của bạn (hoặc nhập 'q' để thoát): "
        # if user_feedback.lower() == "q":
        #     break

        # messages.append({"role": "user", "parts": [{"text": query}]})

    log_message(messages)