"""
passenger_wsgi.py
WSGI entry point for the DataBaser Flask application.

Located at: /home7/smarthoo/apps/databaser/app/passenger_wsgi.py

A symlink from /home7/smarthoo/public_html/databaser/passenger_wsgi.py
will point to this file so Passenger can load it.
"""
import sys
import os
import logging
from pathlib import Path
from logging.handlers import RotatingFileHandler

# ------------------------------------------------------------------------------
# 1) Configure logging with fallbacks
# ------------------------------------------------------------------------------
CURRENT_DIR = Path(__file__).resolve().parent
LOG_LOCATIONS = [
    CURRENT_DIR / "logs",
    CURRENT_DIR / "tmp",
    Path("/tmp")
]

def setup_logging():
    logger = logging.getLogger("passenger_wsgi")
    logger.setLevel(logging.INFO)
    
    # Add stderr handler as fallback
    stderr_handler = logging.StreamHandler(sys.stderr)
    stderr_handler.setFormatter(logging.Formatter("%(asctime)s [%(levelname)s] %(name)s - %(message)s"))
    logger.addHandler(stderr_handler)
    
    # Try each log location until one works
    for log_dir in LOG_LOCATIONS:
        try:
            if not log_dir.exists():
                log_dir.mkdir(mode=0o777, parents=True, exist_ok=True)
            
            log_file = log_dir / "passenger.log"
            handler = RotatingFileHandler(
                log_file,
                maxBytes=1_048_576,  # 1 MB
                backupCount=3,
                mode='a'  # Append mode
            )
            formatter = logging.Formatter("%(asctime)s [%(levelname)s] %(name)s - %(message)s")
            handler.setFormatter(formatter)
            logger.addHandler(handler)
            
            # Test write
            handler.stream.write("")
            handler.stream.flush()
            
            logger.info(f"Successfully set up logging to {log_file}")
            return logger
        except (OSError, IOError) as e:
            logger.warning(f"Could not set up logging in {log_dir}: {e}")
            continue
    
    logger.warning("Could not set up file logging, falling back to stderr only")
    return logger

logger = setup_logging()
logger.info("Starting passenger_wsgi.py...")

# ------------------------------------------------------------------------------
# 2) Ensure this directory is on sys.path
# ------------------------------------------------------------------------------
if str(CURRENT_DIR) not in sys.path:
    sys.path.insert(0, str(CURRENT_DIR))
    logger.info(f"Added {CURRENT_DIR} to sys.path")

# ------------------------------------------------------------------------------
# 3) Import the Flask `app` from app.py as `application`
# ------------------------------------------------------------------------------
try:
    from app import app as application
    logger.info("Flask app imported successfully from app.py!")
    logger.info(f"Registered routes: {[str(r) for r in application.url_map.iter_rules()]}")
except Exception as ex:
    logger.exception("Error loading Flask application", exc_info=ex)
    raise

# ------------------------------------------------------------------------------
# 4) The WSGI callable: Passenger will call `application(environ, start_response)`
#    automatically. If you want to log each request, wrap it or add a debug log.
# ------------------------------------------------------------------------------