from PyPDF2 import PdfReader
from openai import AzureOpenAI
import logging
import os

# Configure logging
logging.basicConfig(
    filename='extract_date.log',  # You can adjust the log file name here
    filemode='a',
    format='[%(asctime)s] [%(levelname)s] [%(filename)s] [%(lineno)s:%(funcName)s()] %(message)s',
    datefmt='%Y-%b-%d %H:%M:%S'
)
LOGGER = logging.getLogger(__name__)

log_level_env = 'INFO'  # You can adjust the log level here
log_level_dict = {
    'DEBUG': logging.DEBUG,
    'INFO': logging.INFO,
    'WARNING': logging.WARNING,
    'ERROR': logging.ERROR,
    'CRITICAL': logging.CRITICAL
}
if log_level_env in log_level_dict:
    log_level = log_level_dict[log_level_env]
else:
    log_level = log_level_dict['INFO']
LOGGER.setLevel(log_level)

class ExtractDateAndDuration:


    def __init__(self):
        """
        Initialize the ExtractDateAndDuration class.
        """
        # openai.api_type = os.getenv['api_type']
        # openai.api_base = os.getenv['api_base']
        # openai.api_version = os.getenv['api_version']
        # openai.api_key = os.getenv['api_key']
        pass
        

    def get_date_and_duration(self, contract_text: str) -> str:
        """
        Extract dates and durations from the provided contract text.

        Args:
            contract_text (str): The text of the contract to analyze.

        Returns:
            str: Extracted dates and durations.
        """
        try:
            client = AzureOpenAI(api_key=os.getenv("AZURE_OPENAI_KEY"),  
                                api_version="2023-07-01-preview",
                                azure_endpoint = os.getenv("AZURE_OPENAI_ENDPOINT")
                                 )
            
            conversation = [
                            {"role": "system", "content": "You are a helpful assistant."},
                            {"role": "user", "content": f"""Your task is Identify Dates and Durations Mentioned in the contract and extract that date and duration in key-value pair.
                        ```contract: {contract_text}```
                        format:
                          date:extracted date
                          Durations:extracted Durations           
                        """}
                        ]

            # Call OpenAI GPT-3.5-turbo
            chat_completion = client.chat.completions.create(
                model = "GPT-3",
                messages = conversation,
                max_tokens=1000,
                temperature=0
            )
            response = chat_completion.choices[0].message.content
            return response

        except Exception as e:
            LOGGER.error(f"An error occurred during text analysis: {str(e)}")

    def itrate_each_page(self, pdf_file_path: str):
        """
        Extract text from each page of a PDF document and process it.

        Args:
            pdf_file_path (str): The path to the PDF document.

        Returns:
            str: Extracted text from the PDF pages.
        """
        try:
            # Open the multi-page PDF using PdfReaderer
            pdf = PdfReader(pdf_file_path.name)

            extracted_date_duration = ""

            # Extract text from each page and pass it to the process_text function
            for page_number in range(len(pdf.pages)):
                # Extract text from the page
                page = pdf.pages[page_number]
                text = page.extract_text()

                # Pass the text to the process_text function for further processing
                extracted_date_duration += self.get_date_and_duration(text)
            return extracted_date_duration

        except Exception as e:
            LOGGER.error(f"An error occurred while processing the PDF document: {str(e)}")