# File: /home/code/projects/manga-organizer-1/cbz-volume-combiner/cbz_volume_combiner/core.py
import os
from collections import defaultdict
from .parsing import parse_manga_filename

def organize_by_volume(cbz_files, extra_verbose=False):
    """Group CBZ files by manga name and volume."""
    volumes = defaultdict(lambda: defaultdict(list))
    unparsed_files = []
    
    for cbz_file in cbz_files:
        info = parse_manga_filename(cbz_file)
        if info:
            manga_key = info['manga_name'].lower()
            volumes[manga_key][info['volume']].append(info)
        else:
            unparsed_files.append(cbz_file)
    
    # Sort chapters within each volume
    for manga in volumes:
        for volume in volumes[manga]:
            volumes[manga][volume].sort(key=lambda x: x['chapter'])
    
    if extra_verbose and unparsed_files:
        print(f"\nWARNING: Could not parse {len(unparsed_files)} files:")
        for file in unparsed_files[:10]:  # Show first 10 only to avoid spam
            print(f"  - {os.path.basename(file)}")
        if len(unparsed_files) > 10:
            print(f"  ... and {len(unparsed_files) - 10} more")
    
    return volumes