{
    "security" : "WEP",
    "SSID" : "Pilve4Welcome",
    "password" : "RetFlat4"
}

{
    "OPEN" : "auto lo\n\niface lo inet loopback\niface eth0 inet dhcp\n\nallow-hotplug wlan0\nauto wlan0\niface wlan0 inet dhcp\n\twireless-essid NAME\n\twireless-mode managed",
    "WPA" : "auto lo\n\niface lo inet loopback\niface eth0 inet dhcp\n\nallow-hotplug wlan0\nauto wlan0\niface wlan0 inet dhcp\n\twpa-ssid \"NAME\"\n\twpa-psk \"PASSWORD\"",
    "WPA_STATIC_IP" : "auto lo\n\niface lo inet loopback\niface eth0 inet dhcp\n\nallow-hotplug wlan0\nauto wlan0\n\twpa-ssid \"NAME\"\n\twpa-psk \"PASSWORD\"\naddress IP\nnetmask NETMASK\ngateway GATEWAY",
    "WEP" : "auto lo\n\niface lo inet loopback\niface eth0 inet dhcp\n\nallow-hotplug wlan0\nauto wlan0\niface wlan0 inet dhcp\n\twireless-essid NAME\n\twireless-key PASSWORD"
}

import json

class NetworkInterfaceChanger:
    def __init__():
        pass


def loadInterfaceScripts():
    pass


def change(type, name, psw):

    file = "NetworkInterfaceScripts.json"
    f = open("/etc/network/interfaces", "w")

    with open(file) as configFile:
        try:
            data = json.load(configFile)
        except ValueError:
            print('wrong JSON')


    text = data[type]
    text = text.replace("NAME", name)
    text = text.replace("PASSWORD", psw)

    f.write(text)
    f.close()

with open("Configuration/NetworkConfig.json") as cfgFile:
    param = json.load(cfgFile)
    change(param["security"], param["SSID"], param["password"])