import os

from gi.repository import GLib, Gtk


_manager = None


def get_recent_python_script_manager(xbel = None):
    """Provide the manager for the recently run Python scripts."""

    global _manager

    # As a first panel creation is forced by the Chrysalide core to register
    # its final GType, xbel is not defined at the first call of this function.
    # Thus relying on the definition of xbel is a better filter than relying
    # on the existence of _manager.
    #
    # In that special initial case, result is None

    if not(xbel is None):

        assert(_manager is None)

        _manager = Gtk.RecentManager(filename=xbel)

    return _manager


def remember_python_script(filename):
    """Register a Python script into the recents list."""

    uri = GLib.filename_to_uri(filename)

    recent_data = Gtk.RecentData()
    recent_data.app_name = 'Chrysalide Python plugin'
    recent_data.app_exec = 'chrysalide'
    recent_data.display_name = os.path.basename(filename)
    recent_data.description = 'Python script run inside Chrysalide'
    recent_data.mime_type = 'text/x-python'

    manager = get_recent_python_script_manager()
    manager.add_full(uri, recent_data)


def forget_python_script(filename):
    """Unregister a Python script from the recents list."""

    uri = GLib.filename_to_uri(filename)

    manager = get_recent_python_script_manager()
    manager.remove_item(uri)