"""
Contains commands for managing script parents.
"""
from src import scripthandler
from src.cmdtable import GLOBAL_CMD_TABLE

def clear_cached_scripts(command):
    """
    Show the currently cached scripts.
    """
    cache_dict = scripthandler.CACHED_SCRIPTS
    cache_size = len(cache_dict)
    cache_dict.clear()
    command.source_object.emit_to(
        "Script parent cached cleared (%d previously in cache)." % cache_size)
    
def show_cached_scripts(command):
    """
    Clears the cached scripts by deleting their keys from the script cache
    dictionary. The next time an object needs the previously loaded scripts,
    they are loaded again.
    """
    cache_dict = scripthandler.CACHED_SCRIPTS
    
    retval = "Currently Cached Script Parents\n"
    retval += "-" * 78
    for script in cache_dict.keys():
        retval += "\n " + script
    retval += "\n" + "-" * 78 + "\n"
    retval += "%d cached parents" % len(cache_dict)
    command.source_object.emit_to(retval)
    
def cmd_parent(command):
    """
    Figure out what form of the command the user is using and branch off
    accordingly.
    """
    if "showcache" in command.command_switches:
        show_cached_scripts(command)
        return
    
    if "clearcache" in command.command_switches:
        clear_cached_scripts(command)
        return
    
    command.source_object.emit_to("Must be specified with one of the following switches: showcache, clearcache")
GLOBAL_CMD_TABLE.add_command("@parent", cmd_parent,
                             priv_tuple=("genperms.builder")),