#!/bin/python3
#
import re
import sys

try:
    src_file = sys.argv[1]
    dst_file = sys.argv[2]
except IndexError:
    print(sys.argv[0], "<src> <dst>")
    sys.exit(17)

try:
    with open(src_file, 'r') as fh:
        s = fh.read()
except (PermissionError, FileNotFoundError) as e:
    print("Unable to open", '"' + src_file + '"')
    sys.exit(18)

n = re.sub('^.*server: .*', '  server: mqtt://<mqtt_smarthome_hostname>', s, flags=re.MULTILINE)
n = re.sub('^.*user: .*', '  user: <mqtt_smarthome_username>', n, flags=re.MULTILINE)
n = re.sub('^.*password: .*', '  password: <mqtt_smarthome_password>', n, flags=re.MULTILINE)
n = re.sub('^.*auth_token: .*', '  auth_token: <zigbee_auth_token>', n, flags=re.MULTILINE)

try:
    with open(dst_file, 'w') as fh:
        fh.write(n)
except PermissionError:
    print("Unable to write", '"' + dst_file + '"')
    sys.exit(19)