import os
import os.path
import json
import yaml
from os import path
from typing import List
from Project import Project

class Context:
   __instance = None

   __projectList=[]
   __envorinments={}


   def envExists(self, env):
      if env in self.__environments:
         return True
      else:
         return False

   def getAllEnvironments(self):
      return self.__environments   

   def getEnvironment(self, env):
      if self.envExists(env):
         return self.__environments[env]
      else:
         raise ValueError('Environment not found: '+ env)   

   def __buildEnvorinment(self, environmentReader):
      self.__environments = environmentReader.read()

   def build(self, restFactory, environmentReader):
     # self.__buildProjectList(projects_root_path, restFactory)
      self.restFactory=restFactory
      self.__buildEnvorinment(environmentReader)
      
      

   @staticmethod 
   def getInstance():
      """ Static access method. """
      if Context.__instance == None:
         Context()
      return Context.__instance

   def __init__(self):
      """ Virtually private constructor. """
      if Context.__instance != None:
         raise Exception("This class is a singleton!")
      else:
         Context.__instance = self