"""Parent class for writing units."""
from . import AccessKeyStore
import inspect
import json
import os
import subprocess

class Units(object):

    @staticmethod
    def prop(obj, path):
        # Helper method to extract nested property values
        nested_keys = path.split("/")
        val = obj
        for key in nested_keys:
            val = val.get(key, {})
        return val


    def __init__(self, debug=False):
        self.debug = debug

    def log(self, text):
        if self.debug:
            func_name = ""
            trace = inspect.stack()
            if len(trace) > 1 and len(trace[1]) > 2:
                func_name = trace[1][3] + ":"
            print "batesian:units:%s %s" % (func_name, text)

    def get_units(self, debug=False):
        unit_list = inspect.getmembers(self, predicate=inspect.ismethod)
        unit_dict = {}
        for (func_name, func) in unit_list:
            if not func_name.startswith("load_"):
                continue
            unit_key = func_name[len("load_"):]
            unit_dict[unit_key] = func()
            self.log("Generated unit '%s' : %s" % (
                unit_key, json.dumps(unit_dict[unit_key])[:50].replace(
                    "\n",""
                )
            ))
        return unit_dict