# processors/cleaner.py

import os
import shutil
from core.constants import TRASH_FILES
from core.result import StepResult


def clean_directory(work_dir: str) -> StepResult:
    """
    Elimina TRASH_FILES del directorio ya extraído.
    Elimina tanto ficheros como directorios de basura (e.g. __MACOSX).
    Sin I/O de archivo de cómic; trabaja sobre el directorio temporal.
    """
    removed = []
    for root, dirs, files in os.walk(work_dir, topdown=False):
        for f in files:
            if f.lower() in TRASH_FILES:
                full = os.path.join(root, f)
                os.remove(full)
                removed.append(os.path.relpath(full, work_dir))
        for d in dirs:
            if d.lower() in TRASH_FILES:
                full = os.path.join(root, d)
                shutil.rmtree(full, ignore_errors=True)
                removed.append(os.path.relpath(full, work_dir) + "/")

    details = [f"Eliminado: {r}" for r in removed]
    return StepResult(
        step="clean",
        changed=bool(removed),
        details=details,
    )