import re
from sjrpc.client import SimpleRpcClient
from cccli import printer
from cccli.clierror import *

class Command(object):

    def __init__(self, argv, rpc):
        if len(argv) < 1:
            raise Exception("Empty command")
        self._argv = argv
        self._rpc = rpc

    def call(self):
        '''Run command'''
        if re.match("^[a-zA-Z0-9]+$", self._argv[0]):
            name = "cmd_%s"%self._argv[0]
            if hasattr(self, name):
                cmd = getattr(self, name)
                return cmd(self._argv)
        raise BadCommand(self._argv[0])

    def usage(self, cmdname, printf=None):
        '''Return usage of a command'''
        fname = "cmd_%s"%cmdname
        if hasattr(self, fname):
            if hasattr(getattr(self, fname), "usage"):
                s = getattr(getattr(self, fname), "usage")
                if printf != None:
                    printf(s)
                return s
            else:
                return "No usage"
        else:
            raise myError("No such command: %s"%cmdname)

    def cmd_exit(self, argv):
        '''Quit application with respect'''
        raise SystemExit()

    def cmd_list(self, argv):
        '''List something'''
        if len(argv) == 1:
            argv.append("hv")
        items = self._rpc.list(str.join("", argv[1:]))
        for item in items:
            for key, val in item.items():
                printer.out("%s: %s "%(key, val))
            printer.out("*"*80)

    def cmd_export(self, argv):
        '''List server exported methods'''
        for cmds in self._rpc.list_commands():
            printer.out("%s"%cmds["name"])