import os
import subprocess
from datetime import datetime

from aiogram.types import BufferedInputFile
from loguru import logger

from config import ADMIN_ID, BACK_DIR, DB_NAME, DB_PASSWORD, DB_USER


async def backup_database():
    from bot import bot

    USER = DB_USER
    HOST = "localhost"
    BACKUP_DIR = BACK_DIR
    DATE = datetime.now().strftime("%Y-%m-%d-%H%M%S")
    BACKUP_FILE = f"{BACKUP_DIR}/{DB_NAME}-backup-{DATE}.sql"

    os.environ["PGPASSWORD"] = DB_PASSWORD

    try:
        subprocess.run(
            ["pg_dump", "-U", USER, "-h", HOST, "-F", "c", "-f", BACKUP_FILE, DB_NAME],
            check=True,
        )
        logger.info(f"Бэкап базы данных создан: {BACKUP_FILE}")
    except subprocess.CalledProcessError as e:
        logger.error(f"Ошибка при создании бэкапа базы данных: {e}")
        return

    try:
        with open(BACKUP_FILE, "rb") as backup_file:
            backup_input_file = BufferedInputFile(
                backup_file.read(), filename=os.path.basename(BACKUP_FILE)
            )
            await bot.send_document(ADMIN_ID, backup_input_file)
        logger.info(f"Бэкап базы данных отправлен админу: {ADMIN_ID}")
    except Exception as e:
        logger.error(f"Ошибка при отправке бэкапа в Telegram: {e}")

    try:
        subprocess.run(
            [
                "find",
                BACKUP_DIR,
                "-type",
                "f",
                "-name",
                "*.sql",
                "-mtime",
                "+3",
                "-exec",
                "rm",
                "{}",
                ";",
            ],
            check=True,
        )
        logger.info("Старые бэкапы удалены.")
    except subprocess.CalledProcessError as e:
        logger.error(f"Ошибка при удалении старых бэкапов: {e}")

    del os.environ["PGPASSWORD"]