import os
import re
import sys
from collections import defaultdict
import logging
from .samba_manager import SambaManager
from .config import Settings
from smb.smb_structs import OperationFailure

# --- Dedicated logger for ComicsManager ---
comics_logger = logging.getLogger('comics_manager')
comics_logger.setLevel(logging.INFO)
comics_logger.propagate = False
if not comics_logger.handlers:
    comics_log_handler = logging.FileHandler("logs/comics_organization.log", mode='a')
    comics_log_handler.setFormatter(logging.Formatter('%(asctime)s - %(levelname)s - %(message)s'))
    comics_logger.addHandler(comics_log_handler)
    comics_logger.addHandler(logging.StreamHandler())

# --- Disable noisy pysmb logger ---
# Temporarily set the pysmb logger levels to CRITICAL to silence its output.
# This needs to be set *after* basicConfig if pysmb initializes its loggers earlier.
try:
    logging.getLogger("smb").setLevel(logging.CRITICAL)
    logging.getLogger("smb.SMBConnection").setLevel(logging.CRITICAL)
except Exception:
    # Handle cases where the logger might not be fully initialized yet
    pass
# ---

class ComicsManager:
    def __init__(self, settings: Settings):
        self.settings = settings
        self.db = None # ComicsManager doesn't use DB
        self.samba_manager = SambaManager(
            settings.samba_server_ip,
            "isolation",
            settings.samba_username,
            settings.samba_password,
        )
        self.comics_root = "/comics/toberead"
        self.comics_dest_root = "/comics/manga"

    def _get_series_name(self, filename):
        base_name, _ = os.path.splitext(filename)
        # This regex is more aggressive at cleaning up chapter/volume numbers and other noise.
        # It looks for common patterns like 'ch.10', 'v02', '123', etc.
        pattern = re.compile(r'[-_\s]*(v(ol)?|c(h)?|chapter|issue|ep|episode)[-_\s]*\d+.*|[-_\s]+\d+$', re.IGNORECASE)
        match = pattern.search(base_name)
        if match:
            return base_name[:match.start()].strip('-_ ')
        return base_name.strip('-_ ')

    def organize_comics(self):
        comics_logger.info("Starting comics organization process...")
        try:
            items_in_toberead = self.samba_manager.list_path(self.comics_root)
            if "error" in items_in_toberead:
                raise Exception(f"Failed to list files in 'toberead': {items_in_toberead['error']}")

            series_chapters = defaultdict(list)
            for item in items_in_toberead:
                if not item["is_directory"]:
                    series_name = self._get_series_name(item["name"])
                    series_chapters[series_name].append(item)
            
            comics_logger.info(f"Found {len(series_chapters)} series to process.")

            for series_name, chapters in series_chapters.items():
                comics_logger.info(f"Processing series: {series_name}")
                # Ensure paths use forward slashes for Samba operations
                final_series_folder_path = f"{self.comics_dest_root}/{series_name}".replace("\", "/")
                
                try:
                    self.samba_manager.create_directory(final_series_folder_path)
                    comics_logger.info(f"Created directory: {final_series_folder_path}")
                except OperationFailure as e:
                    # Specific check for FILE_OBJECT_NAME_COLLISION if directory already exists
                    if "FILE_OBJECT_NAME_COLLISION" in str(e):
                        comics_logger.info(f"Directory {final_series_folder_path} already exists. Skipping creation.")
                    else:
                        comics_logger.error(f"Could not create directory {final_series_folder_path}: {e}")
                
                for chapter_item in chapters:
                    # Sanitize original path coming from list_path
                    original_path = chapter_item["path"].replace("\", "/")
                    original_filename = chapter_item["name"]
                    
                    path_to_move = ""
                    filename_to_move = ""

                    if original_filename.lower().endswith('.zip'):
                        cbz_filename = os.path.splitext(original_filename)[0] + '.cbz'
                        temp_cbz_path = f"{self.comics_root}/{cbz_filename}".replace("\", "/")
                        
                        try:
                            self.samba_manager.rename_file(original_path, temp_cbz_path)
                            path_to_move = temp_cbz_path
                            filename_to_move = cbz_filename
                            comics_logger.info(f"Renamed {original_filename} to {cbz_filename}")
                        except OperationFailure as e:
                            comics_logger.error(f"Failed to rename ZIP {original_filename} to CBZ: {e}")
                            continue # Skip to next chapter if rename fails
                    
                    elif original_filename.lower().endswith('.cbz'):
                        # If it's already a .cbz, it's ready to be moved
                        path_to_move = original_path
                        filename_to_move = original_filename
                    else:
                        comics_logger.warning(f"Skipping non-zip/cbz file: {original_filename}")
                        continue

                    # Final destination path for the CBZ file
                    final_cbz_path = f"{final_series_folder_path}/{filename_to_move}".replace("\", "/")
                    
                    try:
                        self.samba_manager.rename_file(path_to_move, final_cbz_path)
                        comics_logger.info(f"Moved {filename_to_move} to {final_series_folder_path}")
                    except OperationFailure as e:
                        comics_logger.error(f"Failed to move {filename_to_move} to {final_series_folder_path}: {e}")

        except Exception as e:
            comics_logger.error(f"An unexpected error occurred during comics organization: {e}", exc_info=True)
        
        finally:
            comics_logger.info("Comics organization process finished.")
            self.samba_manager.close()
            
        return