from pathlib import Path

from dotenv import load_dotenv
from jinja2 import Environment, select_autoescape, FileSystemLoader
from pdfminer.pdfdocument import PDFDocument
from pdfminer.pdfparser import PDFParser

from config import (
    MENU_CRECHE_PDF_URL,
    MENU_TYPES,
    SIGNAL_SENDER,
    SIGNAL_RECIPIENTS,
    SIGNAL_API_URL,
)
from logging_conf import get_logger
from menus import Menus, MenuMessageFormatter
from message_sender import SignalMessager
from pdf_downloader import download
from result_file import ResultFile

load_dotenv()

logger = get_logger(__name__)


def read_pdf_metadata(pdf_file: Path):
    fp = open(pdf_file, "rb")
    parser = PDFParser(fp)
    doc = PDFDocument(parser)
    return doc.info


def main():
    logger.info(f"Téléchargement du menu à l'adresse {MENU_CRECHE_PDF_URL}...")
    menu_pdf_file = download(MENU_CRECHE_PDF_URL, file_name="menu.pdf")

    try:
        menus = Menus(menu_pdf_file)
    except IndexError as err:
        logger.error(err)
        menus = None

    logger.info("Extraction des métadonnées du PDF")
    pdf_metadata = read_pdf_metadata(menu_pdf_file)
    creation_date = pdf_metadata[0]["CreationDate"].decode("utf-8").removeprefix("D:")
    modification_date = pdf_metadata[0]["ModDate"].decode("utf-8").removeprefix("D:")
    logger.debug(
        f"Le PDF a été créé le {creation_date} et modifié le {modification_date}"
    )

    result_file = ResultFile(Path.home() / ".cache" / "menu_creche.txt")

    templates_path = Path(__file__).parent / "templates"
    env = Environment(
        loader=FileSystemLoader(templates_path), autoescape=select_autoescape()
    )
    message_formatter = MenuMessageFormatter(env)

    for menu_type in MENU_TYPES:
        if result_file.was_already_sent(creation_date, modification_date, menu_type):
            logger.info(f"Le menu {menu_type} du PDF a déjà été envoyé par le passé.")
            continue

        logger.debug(f"Création du message à envoyer pour le menu {menu_type}")
        message = message_formatter.create_message(menus, menu_type)

        logger.info(
            f"Envoi du message aux numéros {SIGNAL_RECIPIENTS} de la part de {SIGNAL_SENDER}"
        )
        logger.debug(f"Le message envoyé a pour contenu :\n\n{message}")
        signal_messager = SignalMessager(SIGNAL_API_URL, SIGNAL_SENDER)
        signal_messager.send_message(message, menu_pdf_file, SIGNAL_RECIPIENTS)

        result_file.write(creation_date, modification_date, menu_type)


if __name__ == "__main__":
    main()