"""Logging utilities (placeholder for legacy compatibility)."""
import json
import logging
from uuid import uuid4
from pathlib import Path
from threading import Lock
from datetime import datetime
from typing import Dict, Any, Optional

from .config import load_config

def save_logs(
    scheduler=None,
    json_dataset_path: Path = None,
    logs_data: Dict[str, Any] = None,
    feedback: str = None
) -> None:
    """
    Save logs (placeholder for legacy compatibility).
    
    Args:
        scheduler: HuggingFace scheduler (not used in refactored version)
        json_dataset_path: Path to JSON dataset
        logs_data: Log data dictionary
        feedback: User feedback
        
    Note:
        This is a placeholder function for backward compatibility.
        In the refactored version, logging would be handled differently.
    """
    if not is_logging_enabled():
        return
    try:
        current_time = datetime.now().timestamp()
        logs_data["time"] = str(current_time)
        if feedback:
            logs_data["feedback"] = feedback
            logs_data["record_id"] = str(uuid4())
        field_order = [
            "record_id",
            "session_id",
            "time",
            "session_duration_seconds",
            "client_location",
            "platform",
            "system_prompt",
            "sources",
            "reports",
            "subtype",
            "year",
            "question",
            "retriever",
            "endpoint_type",
            "reader",
            "docs",
            "answer",
            "feedback"
        ]
        ordered_logs = {k: logs_data.get(k) for k in field_order if k in logs_data}
        lock = getattr(scheduler, "lock", None)
        if lock is None:
            lock = Lock()
        with lock:
            with open(json_dataset_path, 'a') as f:
                json.dump(ordered_logs, f)
                f.write("\n")
                logging.info("logging done")
    except Exception as e:
        logging.error(f"Error saving logs: {e}")
        raise


def setup_logging(log_level: str = "INFO", log_file: str = None) -> None:
    """
    Set up logging configuration.
    
    Args:
        log_level: Logging level
        log_file: Optional log file path
    """
    if not is_logging_enabled():
        return
    
    # Configure logging
    logging.basicConfig(
        level=getattr(logging, log_level.upper()),
        format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
        handlers=[
            logging.StreamHandler(),
            logging.FileHandler(log_file) if log_file else logging.NullHandler()
        ]
    )


def log_query_response(
    query: str,
    response: str,
    metadata: Dict[str, Any] = None
) -> None:
    """
    Log query and response for analysis.
    
    Args:
        query: User query
        response: System response
        metadata: Additional metadata
    """
    if not is_logging_enabled():
        return
    
    logger = logging.getLogger(__name__)
    
    log_entry = {
        "query": query,
        "response_length": len(response),
        "metadata": metadata or {}
    }
    
    logger.info(f"Query processed: {log_entry}")


def log_error(error: Exception, context: Dict[str, Any] = None) -> None:
    """
    Log error with context.
    
    Args:
        error: Exception that occurred
        context: Additional context information
    """
    if not is_logging_enabled():
        return
    
    logger = logging.getLogger(__name__)
    
    error_info = {
        "error_type": type(error).__name__,
        "error_message": str(error),
        "context": context or {}
    }
    
    logger.error(f"Error occurred: {error_info}")


def log_performance_metrics(
    operation: str,
    duration: float,
    metadata: Dict[str, Any] = None
) -> None:
    """
    Log performance metrics.
    
    Args:
        operation: Name of the operation
        duration: Duration in seconds
        metadata: Additional metadata
    """
    if not is_logging_enabled():
        return
    
    logger = logging.getLogger(__name__)
    
    metrics = {
        "operation": operation,
        "duration_seconds": duration,
        "metadata": metadata or {}
    }
    
    logger.info(f"Performance metrics: {metrics}")


def is_session_enabled() -> bool:
    """
    Returns True if session management is enabled, False otherwise.
    Checks environment variable ENABLE_SESSION first, then config.
    """
    env = os.getenv("ENABLE_SESSION")
    if env is not None:
        return env.lower() in ("1", "true", "yes", "on")
    config = load_config()
    return config.get("features", {}).get("enable_session", True)


def is_logging_enabled() -> bool:
    """
    Returns True if logging is enabled, False otherwise.
    Checks environment variable ENABLE_LOGGING first, then config.
    """
    env = os.getenv("ENABLE_LOGGING")
    if env is not None:
        return env.lower() in ("1", "true", "yes", "on")
    config = load_config()
    return config.get("features", {}).get("enable_logging", True)