import warnings
import functools

# Initialize _future_flags with all future flags that are now always in
# effect.
_future_flags = {
    "renderer_defaults",
    "template_defaults",
    "extract_chart_studio",
    "remove_deprecations",
    "v4_subplots",
    "orca_defaults",
    "timezones",
    "trace_uids",
}


def _assert_plotly_not_imported():
    import sys

    if "plotly" in sys.modules:
        raise ImportError(
            """\
The _plotly_future_ module must be imported before the plotly module"""
        )


warnings.filterwarnings(
    "default", ".*?is deprecated, please use chart_studio*", DeprecationWarning
)


def _chart_studio_warning(submodule):
    warnings.warn(
        "The plotly.{submodule} module is deprecated, "
        "please use chart_studio.{submodule} instead".format(submodule=submodule),
        DeprecationWarning,
        stacklevel=2,
    )


def _chart_studio_error(submodule):
    raise ImportError(
        """
The plotly.{submodule} module is deprecated,
please install the chart-studio package and use the
chart_studio.{submodule} module instead. 
""".format(
            submodule=submodule
        )
    )


def _chart_studio_deprecation(fn):

    fn_name = fn.__name__
    fn_module = fn.__module__
    plotly_name = ".".join(["plotly"] + fn_module.split(".")[1:] + [fn_name])
    chart_studio_name = ".".join(
        ["chart_studio"] + fn_module.split(".")[1:] + [fn_name]
    )

    msg = """\
{plotly_name} is deprecated, please use {chart_studio_name}\
""".format(
        plotly_name=plotly_name, chart_studio_name=chart_studio_name
    )

    @functools.wraps(fn)
    def wrapper(*args, **kwargs):
        warnings.warn(msg, DeprecationWarning, stacklevel=2)

        return fn(*args, **kwargs)

    return wrapper


__all__ = ["_future_flags", "_chart_studio_error"]