# processors/validator.py

import os
from core.archive import detect_real_format
from core.result import StepResult


class ValidationResult:
    def __init__(self, path):
        self.path = path
        self.real_format = None     # "zip", "rar", None
        self.extension = None       # ".cbz" o ".cbr"
        self.errors = []
        self.warnings = []

    def summary(self):
        """Resumen compacto para mostrar en consola."""
        if self.errors:
            return f"ERROR: {', '.join(self.errors)}"
        if self.warnings:
            return f"AVISO: {', '.join(self.warnings)}"
        return "OK"

    def __str__(self):
        """Salida detallada (solo si el usuario la pide)."""
        msg = f"Validación de: {self.path}\n"
        msg += f"  Formato real: {self.real_format}\n"
        msg += f"  Extensión: {self.extension}\n"
        if self.errors:
            msg += "  Errores:\n"
            for e in self.errors:
                msg += f"    - {e}\n"
        if self.warnings:
            msg += "  Avisos:\n"
            for w in self.warnings:
                msg += f"    - {w}\n"
        return msg


def validate_comic(path) -> ValidationResult:
    """Modo standalone: comprueba formato e integridad. Para --validar en CLI."""
    result = ValidationResult(path)
    ext = os.path.splitext(path)[1].lower()
    result.extension = ext

    real = detect_real_format(path)
    result.real_format = real

    if real is None:
        result.errors.append("Archivo corrupto o ilegible")
        return result

    if ext == ".cbz" and real == "rar":
        result.warnings.append("Extensión incorrecta: debería ser .cbr")

    if ext == ".cbr" and real == "zip":
        result.warnings.append("Extensión incorrecta: debería ser .cbz")

    return result


def validate_archive(path: str) -> StepResult:
    """Para el pipeline: devuelve StepResult con errores/avisos de validación."""
    vr = validate_comic(path)
    return StepResult(
        step="validate",
        changed=False,
        details=[f"Formato real: {vr.real_format}, extensión: {vr.extension}"],
        warnings=list(vr.warnings),
        errors=list(vr.errors),
    )