class TextFieldStyles:
    """Estilos centralizados para TextField."""

    @staticmethod
    def _on_focus(e):
        """Cambia el fondo al color de foco cuando el campo recibe el foco."""
        if not e.control.read_only:
            e.control.bgcolor = Colors.Focus.BGCOLOR
        e.control.update()

    @staticmethod
    def _on_blur(e):
        """Restaura el fondo original cuando el campo pierde el foco."""
        if e.control.read_only:
            e.control.bgcolor = Colors.ReadOnly.BGCOLOR
        else:
            e.control.bgcolor = Colors.FORM_BACKGROUND
        e.control.update()

    @staticmethod
    def default(
        label: str = None,
        hint_text: str = None,
        read_only: bool = False,
        disabled: bool = False,
        **kwargs
    ) -> dict:
        style = {
            "filled":True,
            "color": ft.Colors.BLACK,
            "border_color": Colors.PRIMARY,
            "border_width": 1,
            "border_radius": 5,
            "bgcolor": Colors.FORM_BACKGROUND,
            "focused_border_color": Colors.Focus.BORDER_COLOR,
            "focused_bgcolor": Colors.Focus.BGCOLOR,
            "counter_style": ft.TextStyle(color=ft.Colors.TRANSPARENT, size=0),
            "on_focus": TextFieldStyles._on_focus,
            "on_blur": TextFieldStyles._on_blur,
        }
        if read_only:
            style["bgcolor"] = Colors.ReadOnly.BGCOLOR
            style["read_only"] = True
        elif disabled:
            style["disabled"] = True

        if label:
            style["label"] = label
        if hint_text:
            style["hint_text"] = hint_text
        style.update(kwargs)
        return style

    @staticmethod
    def read_only(label: str = None, **kwargs) -> dict:
        return TextFieldStyles.default(label=label, read_only=True, **kwargs)

    @staticmethod
    def disabled(label: str = None, **kwargs) -> dict:
        return TextFieldStyles.default(label=label, disabled=True, **kwargs)

    @staticmethod
    def error(label: str = None, **kwargs) -> dict:
        style = TextFieldStyles.default(label=label, **kwargs)
        style["border_color"] = ft.Colors.RED_400
        return styl