import os
import sys
import argparse
import Object
import jwutils.log
import importlib
import inspect
import re

class Cmds(Object.Object): # export

    def __init__(self, description = '', filter = '^Cmd.*', modules=None):
        self.__description = description
        self.__filter = filter
        self.__modules = modules
        self.__parser = argparse.ArgumentParser(usage=os.path.basename(sys.argv[0]) + ' [command] [options]',
            formatter_class=argparse.ArgumentDefaultsHelpFormatter, description=self.__description)
        self.__parser.add_argument('--log-flags', help='Log flags', default='stderr,position,prio,color')
        self.__parser.add_argument('--log-level', help='Log level', default=jwutils.log.NOTICE)
        subparsers = self.__parser.add_subparsers(title='Available commands', metavar='')
        if self.__modules == None:
            self.__modules = [ '__main__' ]
        for m in self.__modules:
            if m != '__main__':
                importlib.import_module(m)
            for name, c in inspect.getmembers(sys.modules[m], inspect.isclass):
                if not re.match(self.__filter, name):
                    continue
                if inspect.isabstract(c):
                    continue
                c().add_parser(subparsers)

    def parser():
        return self.__parser

    def run(self):
        args = self.__parser.parse_args()
        jwutils.log.set_level(args.log_level)
        jwutils.log.set_flags(args.log_flags)
        args.func(args)

def run_sub_commands(description = '', filter = '^Cmd.*', modules=None): # export
    cmds = Cmds(description, filter, modules)
    cmds.run()