# -*- coding: utf-8 -*-
import json
import os
import collections 

class StudyData():
    _instance=None
    """Class to write and save informations about process in the json"""
    def __init__(self):
        self.name_study = "Study"
	self.study_directory = ""
	self.compteur_run_process={}
	self.runs=collections.OrderedDict()
	
    @staticmethod
    def get_instance():
        if StudyData._instance is None:
            StudyData._instance=StudyData()
            return StudyData._instance
        else:
            return StudyData._instance
	    
    """Save on json with OrderedDict"""	    
    def save(self):
	self.dico=collections.OrderedDict([('name_study',self.name_study),('study_directory',self.study_directory),('compteur_run_process',self.compteur_run_process),('runs',self.runs)])
        json_string = json.dumps(self.dico, indent=4, separators=(',', ': '))
        with open(os.path.join(self.study_directory,self.name_study+'.json'), 'w') as f:
            f.write(unicode(json_string))

    """Load and put on self.__dict__ OrderedDict"""	 
    def load(self):
	try:
            with open(os.path.join(self.study_directory,self.name_study+'.json'), 'r') as json_data:
                self.__dict__ = json.load(json_data,object_pairs_hook=collections.OrderedDict)	
	#No file to load	
        except IOError:
	    pass
		
    """Get number of run process and iterate"""	    
    def inc_nb_run_process(self,name_process):
	if self.compteur_run_process.has_key(name_process):
	    valeur=self.compteur_run_process[name_process]
	    self.compteur_run_process[name_process]=valeur+1
	else:
	    self.compteur_run_process[name_process]=1