# processors/validator.py

import os
import zipfile
import rarfile   # Necesita: pip install rarfile

IMAGE_EXTENSIONS = {".jpg", ".jpeg", ".png", ".webp"}
TRASH_FILES = {"thumbs.db", ".ds_store"}

class ValidationResult:
    def __init__(self, path):
        self.path = path
        self.is_valid = True
        self.errors = []
        self.warnings = []
        self.images = []

    def add_error(self, msg):
        self.is_valid = False
        self.errors.append(msg)

    def add_warning(self, msg):
        self.warnings.append(msg)

    def __str__(self):
        status = "OK" if self.is_valid else "ERROR"
        return f"[{status}] {self.path}"


def validate_comic(path):
    """
    Valida un archivo CBR/CBZ y devuelve un ValidationResult.
    """
    result = ValidationResult(path)
    ext = os.path.splitext(path)[1].lower()

    try:
        if ext == ".cbz":
            archive = zipfile.ZipFile(path, "r")
            file_list = archive.namelist()

        elif ext == ".cbr":
            archive = rarfile.RarFile(path, "r")
            file_list = archive.namelist()

        else:
            result.add_error("Extensión no reconocida")
            return result

    except Exception as e:
        result.add_error(f"No se pudo abrir el archivo: {e}")
        return result

    # Comprobar imágenes
    for f in file_list:
        name = f.lower()
        _, fext = os.path.splitext(name)

        if fext in IMAGE_EXTENSIONS:
            result.images.append(f)

        if os.path.basename(name) in TRASH_FILES:
            result.add_warning(f"Archivo basura encontrado: {f}")

    if not result.images:
        result.add_error("No contiene imágenes válidas")

    return result