"""
Logging Configuration for Trasabilitate Application
Centralizes all logging setup for the application
"""

import logging
import logging.handlers
import os
import sys
from datetime import datetime

def setup_logging(app=None, log_dir='/srv/quality_app/logs'):
    """
    Configure comprehensive logging for the application
    
    Args:
        app: Flask app instance (optional)
        log_dir: Directory to store log files
    """
    
    # Ensure log directory exists
    os.makedirs(log_dir, exist_ok=True)
    
    # Create formatters
    detailed_formatter = logging.Formatter(
        '[%(asctime)s] [%(name)s] [%(levelname)s] %(filename)s:%(lineno)d - %(funcName)s() - %(message)s',
        datefmt='%Y-%m-%d %H:%M:%S'
    )
    
    simple_formatter = logging.Formatter(
        '[%(asctime)s] [%(levelname)s] %(message)s',
        datefmt='%Y-%m-%d %H:%M:%S'
    )
    
    # Create logger
    root_logger = logging.getLogger()
    root_logger.setLevel(logging.DEBUG)
    
    # Remove any existing handlers to avoid duplicates
    for handler in root_logger.handlers[:]:
        root_logger.removeHandler(handler)
    
    # ========================================================================
    # File Handler - All logs (DEBUG and above)
    # ========================================================================
    all_log_file = os.path.join(log_dir, f'application_{datetime.now().strftime("%Y%m%d")}.log')
    file_handler_all = logging.handlers.RotatingFileHandler(
        all_log_file,
        maxBytes=10 * 1024 * 1024,  # 10 MB
        backupCount=10
    )
    file_handler_all.setLevel(logging.DEBUG)
    file_handler_all.setFormatter(detailed_formatter)
    root_logger.addHandler(file_handler_all)
    
    # ========================================================================
    # File Handler - Error logs (ERROR and above)
    # ========================================================================
    error_log_file = os.path.join(log_dir, f'errors_{datetime.now().strftime("%Y%m%d")}.log')
    file_handler_errors = logging.handlers.RotatingFileHandler(
        error_log_file,
        maxBytes=5 * 1024 * 1024,  # 5 MB
        backupCount=5
    )
    file_handler_errors.setLevel(logging.ERROR)
    file_handler_errors.setFormatter(detailed_formatter)
    root_logger.addHandler(file_handler_errors)
    
    # ========================================================================
    # Console Handler - INFO and above (for Docker logs)
    # ========================================================================
    console_handler = logging.StreamHandler(sys.stdout)
    console_handler.setLevel(logging.INFO)
    console_handler.setFormatter(simple_formatter)
    root_logger.addHandler(console_handler)
    
    # ========================================================================
    # Database-specific logger
    # ========================================================================
    db_logger = logging.getLogger('trasabilitate.db')
    db_logger.setLevel(logging.DEBUG)
    
    db_log_file = os.path.join(log_dir, f'database_{datetime.now().strftime("%Y%m%d")}.log')
    db_file_handler = logging.handlers.RotatingFileHandler(
        db_log_file,
        maxBytes=10 * 1024 * 1024,  # 10 MB
        backupCount=10
    )
    db_file_handler.setLevel(logging.DEBUG)
    db_file_handler.setFormatter(detailed_formatter)
    db_logger.addHandler(db_file_handler)
    
    # ========================================================================
    # Routes-specific logger
    # ========================================================================
    routes_logger = logging.getLogger('trasabilitate.routes')
    routes_logger.setLevel(logging.DEBUG)
    
    routes_log_file = os.path.join(log_dir, f'routes_{datetime.now().strftime("%Y%m%d")}.log')
    routes_file_handler = logging.handlers.RotatingFileHandler(
        routes_log_file,
        maxBytes=10 * 1024 * 1024,  # 10 MB
        backupCount=10
    )
    routes_file_handler.setLevel(logging.DEBUG)
    routes_file_handler.setFormatter(detailed_formatter)
    routes_logger.addHandler(routes_file_handler)
    
    # ========================================================================
    # Settings-specific logger
    # ========================================================================
    settings_logger = logging.getLogger('trasabilitate.settings')
    settings_logger.setLevel(logging.DEBUG)
    
    settings_log_file = os.path.join(log_dir, f'settings_{datetime.now().strftime("%Y%m%d")}.log')
    settings_file_handler = logging.handlers.RotatingFileHandler(
        settings_log_file,
        maxBytes=5 * 1024 * 1024,  # 5 MB
        backupCount=5
    )
    settings_file_handler.setLevel(logging.DEBUG)
    settings_file_handler.setFormatter(detailed_formatter)
    settings_logger.addHandler(settings_file_handler)
    
    # Log initialization
    root_logger.info("=" * 80)
    root_logger.info("Trasabilitate Application - Logging Initialized")
    root_logger.info("=" * 80)
    root_logger.info(f"Log directory: {log_dir}")
    root_logger.info(f"Main log file: {all_log_file}")
    root_logger.info(f"Error log file: {error_log_file}")
    root_logger.info(f"Database log file: {db_log_file}")
    root_logger.info(f"Routes log file: {routes_log_file}")
    root_logger.info(f"Settings log file: {settings_log_file}")
    root_logger.info("=" * 80)
    
    return root_logger


def get_logger(name):
    """Get a logger with the given name"""
    return logging.getLogger(f'trasabilitate.{name}')