import os
import logging
from datetime import datetime

class LogService:
    def __init__(self, log_dir="logs"):
        self.log_dir = log_dir
        os.makedirs(self.log_dir, exist_ok=True)

        log_filename = os.path.join(self.log_dir, f"{datetime.now().strftime('%Y-%m-%d')}.log")
        
        # Tạo logger
        self.logger = logging.getLogger("TaskLogger")
        self.logger.setLevel(logging.INFO)
        self.logger.propagate = False

        # Xóa handler cũ để tránh duplicate log khi import nhiều lần
        if self.logger.handlers:
            self.logger.handlers.clear()

        # Ghi file
        file_handler = logging.FileHandler(log_filename, encoding="utf-8")
        file_handler.setLevel(logging.INFO)

        # In ra console
        console_handler = logging.StreamHandler()
        console_handler.setLevel(logging.INFO)

        # Format log
        formatter = logging.Formatter(
            '%(asctime)s - %(levelname)s - %(message)s',
            datefmt='%Y-%m-%d %H:%M:%S'
        )
        file_handler.setFormatter(formatter)
        console_handler.setFormatter(formatter)

        self.logger.addHandler(file_handler)
        self.logger.addHandler(console_handler)

    def info(self, message: str):
        self.logger.info(message)

    def error(self, message: str):
        self.logger.error(message)

    def warning(self, message: str):
        self.logger.warning(message)

# Singleton instance dùng chung toàn app
log_service = LogService()