import logging
import queue
import sys
import os
import datetime
import configparser

# --- Global Message Queue for GUI Communication ---
# All log messages and AHK output pass through this queue to the View.
message_queue = queue.Queue() 

# --- Custom QueueHandler for UI messages ---
class QueueHandler(logging.Handler):
    """
    Custom logging handler to push *only the raw message* to a queue,
    allowing the GUI to display it directly without additional formatting.
    """
    def __init__(self, message_queue):
        super().__init__()
        self.message_queue = message_queue

    def emit(self, record):
        # Use record.getMessage() to get the log message without formatters applied
        self.message_queue.put(record.getMessage()) 

# --- Configuration Constants for Logging ---
LOG_FILENAME_BASE = "JarvisKeyPressUtility"
CONFIG_FILE_NAME = "config.ini"

def setup_logging_from_config():
    """
    Sets up logging handlers (console and file) based on settings in config.ini.
    Creates a default config.ini if it doesn't exist.
    This function should be called once at application startup.
    """
    root_logger = logging.getLogger()
    
    # Clear existing handlers to prevent duplicates if function is called multiple times
    if root_logger.handlers:
        for handler in list(root_logger.handlers):
            root_logger.removeHandler(handler)

    config = configparser.ConfigParser()

    # Determine the execution directory for the config and log files
    if getattr(sys, 'frozen', False): # Running as a PyInstaller executable
        execution_dir = os.path.dirname(sys.executable)
    else: # Running as a Python script
        # When called from main.py, os.path.abspath(__file__) points to model/app_logger.py.
        # Need to go up two levels to reach project root where config.ini is expected.
        execution_dir = os.path.abspath(os.path.join(os.path.dirname(__file__), os.pardir))
    
    config_file_path = os.path.join(execution_dir, CONFIG_FILE_NAME)

    # Create default config.ini if it doesn't exist
    if not os.path.exists(config_file_path):
        config['Logging'] = {
            'file_log_level': 'DEBUG',  # Default to DEBUG for file
            'console_log_level': 'INFO' # Default to INFO for console
        }
        try:
            with open(config_file_path, 'w') as f:
                config.write(f)
            print(f"Created default '{CONFIG_FILE_NAME}' at '{config_file_path}'")
        except IOError as e:
            print(f"Error creating default config.ini at {config_file_path}: {e}")
            # Fallback to default levels if config file cannot be created
            file_log_level = logging.DEBUG
            console_log_level = logging.INFO
    else:
        config.read(config_file_path)
        # Get log levels from config, default to INFO if not found or invalid
        file_log_level_str = config.get('Logging', 'file_log_level', fallback='DEBUG').upper()
        console_log_level_str = config.get('Logging', 'console_log_level', fallback='INFO').upper()

        file_log_level = getattr(logging, file_log_level_str, logging.INFO)
        console_log_level = getattr(logging, console_log_level_str, logging.INFO)

    # Set the root logger level to the lowest (most verbose) level needed by any handler
    root_logger.setLevel(min(file_log_level, console_log_level, logging.WARNING)) 

    # 1. Console Handler: Outputs to stdout
    console_handler = logging.StreamHandler(sys.stdout)
    console_formatter = logging.Formatter('%(asctime)s - %(levelname)s - %(name)s - %(message)s')
    console_handler.setFormatter(console_formatter)
    console_handler.setLevel(console_log_level) # Set level for console output
    root_logger.addHandler(console_handler)

    # 2. File Handler: Outputs to a log file
    timestamp = datetime.datetime.now().strftime("%Y-%m-%d_%H-%M-%S")
    log_file_path = os.path.join(execution_dir, f"{LOG_FILENAME_BASE}_{timestamp}.log")
    
    file_handler = logging.FileHandler(log_file_path, encoding='utf-8')
    file_formatter = logging.Formatter('%(asctime)s - %(levelname)s - %(name)s - %(funcName)s - %(message)s')
    file_handler.setFormatter(file_formatter)
    file_handler.setLevel(file_log_level) # Set level for file output (e.g., DEBUG for all)
    root_logger.addHandler(file_handler)

    # 3. UI Queue Handler (for messages sent to Tkinter GUI)
    ui_queue_handler = QueueHandler(message_queue)
    ui_queue_handler.setLevel(logging.WARNING) # UI usually wants WARNING or higher messages by default
    root_logger.addHandler(ui_queue_handler)

    return log_file_path # Return path for initial log message in main