import sys
import os
from pathlib import Path
from datetime import datetime
from typing import Optional
from loguru import logger
from config import Settings

# Basic fallback logging configuration
logger.remove()
logger.add(sys.stderr, level="WARNING", format="{time:YYYY-MM-DD HH:mm:ss} | {level} | {message}")

def configure_logging(log_level: str = "INFO", log_dir: Optional[str] = None):
    """Configure structured logging for the application with fallback handling"""
    try:
        # Log that we're attempting to configure logging
        
        # Default log directory
        if not log_dir:
            log_dir = os.getenv("LOG_DIR", "logs")
        
        # Create log directory if it doesn't exist
        Path(log_dir).mkdir(parents=True, exist_ok=True)
        
        # Log file path with timestamp
        log_file = Path(log_dir) / f"jira-webhook-llm_{datetime.now().strftime('%Y%m%d_%H%M%S')}.log"
        
        # Remove any existing loggers
        logger.remove()
        
        # Add console logger
        logger.add(
            sys.stdout,
            level=log_level,
            format="{time:YYYY-MM-DD HH:mm:ss.SSS} | {level} | {extra[request_id]} | {message}",
            colorize=True,
            backtrace=True,
            diagnose=True
        )
        
        # Add file logger
        logger.add(
            str(log_file),
            level=log_level,
            format="{time:YYYY-MM-DD HH:mm:ss.SSS} | {level} | {extra[request_id]} | {message}",
            rotation="100 MB",
            retention="30 days",
            compression="zip",
            backtrace=True,
            diagnose=True
        )
        
        # Configure default extras
        # Configure thread-safe defaults
        logger.configure(
            extra={"request_id": "N/A"},
            patcher=lambda record: record["extra"].update(
                thread_id = record["thread"].id if hasattr(record.get("thread"), 'id') else "main"
            )
        )
        
        logger.info("Logging configured successfully")
        settings = Settings()
        # Removed duplicate logging_ready.set() call
        logger.debug("Signaled logging_ready event")
    except Exception as e:
        # Fallback to basic logging if configuration fails
        logger.remove()
        logger.add(sys.stderr, level="WARNING", format="{time:YYYY-MM-DD HH:mm:ss} | {level} | {message}")
        logger.error(f"Failed to configure logging: {str(e)}. Using fallback logging configuration.")
        settings = Settings()
        try:
            settings.logging_ready.set()
            logger.debug("Signaled logging_ready event")
        except Exception as inner_e:
            logger.error(f"Failed to signal logging_ready: {str(inner_e)}")
        raise  # Re-raise the original exception