import csv
import os
import os.path
from sys import argv
#from pathlib2 import Path

def write_to_csv(data):
    statinfo = None
    file_existed = os.path.isfile('matecomdata.csv')
    if (file_existed):
        statinfo = os.stat('matecomdata.csv')
    
    file = open("matecomdata.csv", 'a')
    #print (statinfo.st_size)
        
    if not file_existed or (file_existed and statinfo.st_size == 0):
        line = ""
        for key,value in data.iteritems():
            if len(line) == 0:
                line+=key
            else:
                line+=","+key
        file.write(line)
        file.write("\n")
    line = ""
    for key,value in data.iteritems():
        if len(line) == 0:
            line+=repr(value)
        else:
            #line+=","+value
            #line+=repr(value)
            line+=","+repr (value)
    file.write(line)
    file.write("\n")   

if __name__ == "__main__":
    data = {'daily_ah': '144.0', 'pv_current': '0', 'charger_mode': '00', 'error_mode': '000', 'pv_voltage': '18', 'aux_mode': '03', 'address': 'A', 'charge_current': '0.0', 'daily_kwh': '7.8', 'bat_voltage': '51.1'}
    write_to_csv(data)