#!/usr/bin/env python3
# https://www.magdiblog.fr/gpio/teleinfo-edf-suivi-conso-de-votre-compteur-electrique/

import argparse
import json
import subprocess
import sys
import serial
import serial.tools.list_ports

parser = argparse.ArgumentParser(description='Téléinfo retriever.')
parser.add_argument("-f", "--format", help="Output format.",
                    type=str, choices=['human-readable', 'raw_json', 'custom_json'], default='human-readable')
args = parser.parse_args()

baudrate = 1200
port = None
    
def list_serial_ports():
    ports = serial.tools.list_ports.comports()
    for port, desc, hwid in sorted(ports):
        print("{}: {} [{}]".format(port, desc, hwid))

def find_serial_ports():
    ports = serial.tools.list_ports.comports()
    for port, desc, hwid in sorted(ports):
        if "Interface USB 1 TIC" in desc:
            return port

port = find_serial_ports()
if port is None:
    print("Unable to find serial port for Teleinfo please use one of the following")
    list_serial_ports()
    sys.exit(2)

tinfo = serial.Serial( port=port,
                       baudrate=baudrate,
                       parity=serial.PARITY_EVEN,
                       stopbits=serial.STOPBITS_ONE,
                       bytesize=serial.SEVENBITS )

# This can be used to detect overload warning frames
#while True:
#       c = tinfo.read(1)
#       #print(c, end='');
#       sys.stdout.write(c.decode('utf-8'))

for x in range(16):
  tinfo.read(1)

while tinfo.read(1)[0]!=0x03:
  pass

lines = []
fullframe = False
line = ""
# loop thru serial
while fullframe==False:
  c = tinfo.read(1)
  if c[0]==0x02:
    # Startframe character
    pass
  elif c[0]==0x03:
    # Endframe character
    fullframe = True
  elif c[0]==0x09:
    line += " "
  elif c[0]==0x0d:
    # Endline character
    lines.append(line)
  elif c[0]==0x0a:
    # Startline character
    line = ""
  else:
    line += c.decode("ascii")

res = dict()
for line in lines:
    l = line.split(' ')
    res[l[0]] = l[1]

if args.format == 'human-readable':
    print("Puissance apparente compteur : "+str(int(res['PAPP']))+"VA")
    # moins précis car Intensité arrondie à l'entier
    print("Puissance apparente calculée : "+str(int(res['IINST'])*230)+"VA")
    print("Puissance souscrite : 6kVA")
    print("Puissance max avant coupure (marge 30%) : 7,8kVA")
    print("Intensité : "+str(int(res['IINST']))+"A")
    print("Intensité abonnement : "+str(int(res['ISOUSC']))+"A")
    print("Consommation : "+str(int(res['BASE']))+"Wh")
elif args.format == 'raw_json':
    print(json.dumps(res))
elif args.format == 'custom_json':
    data = {}
    data['Modane_elec_main_power'] = int(res['PAPP'])
    data['Modane_elec_energy_index'] = int(res['BASE'])
    print(json.dumps(data))