from django.utils import timezone
from django.db import models
from django.conf import settings

from macaddress.fields import MACAddressField
import uuid
import glob
import os
from datetime import datetime


def getRandom():
    return str(uuid.uuid4().hex)


class Organization(models.Model):
    name = models.CharField(
            "Organization Name",
            max_length=300
            )

    users = models.ManyToManyField(
            settings.AUTH_USER_MODEL
            )

    userlimit = models.IntegerField(
            "User Limit",
            null=True,
            blank=True
            )

    def __str__(self):
        return self.name

    def orgausers(self):
        return self.users.filter(is_superuser=False)


class Network(models.Model):
    name = models.CharField(
            max_length=64,
            blank=True,
            null=True
            )

    extip = models.CharField(
            "External/Public IP",
            max_length=15,
            unique=True
            )

    intip = models.CharField(
            "Internal/Private IP",
            max_length=15,
            unique=True
            )

    organization = models.ManyToManyField(
            Organization
            )

    def __str__(self):
        return "%s" % self.intip + (" (%s)" % self.name if self.name else "")


class Model(models.Model):
    name = models.CharField(
            "Model Name",
            max_length=100,
            unique=True
            )

    extname = models.CharField(
            "Manufacturer Model Name",
            max_length=100
            )

    config = models.TextField(
            "OpenWRT Compile Config",
            blank=True,
            null=True
            )

    firmware = models.DateTimeField(
            "Last Firmware Change",
            auto_now=True
            )

    wwan = models.BooleanField(
            "Supports WWAN (External WiFi)",
            default=False
            )

    deprecated = models.BooleanField(
            "Outdated device type",
            default=False
            )

    def __str__(self):
        return self.name


class Wifi(models.Model):
    serial = models.CharField(
            "Device Serial Number",
            max_length=12,
            unique=True
            )

    organization = models.ForeignKey(
            Organization,
            on_delete=models.CASCADE
            )

    ssid = models.CharField(
            "WiFi SSID",
            max_length=32
            )

    bssid = models.CharField(
            "WiFi BSSID",
            max_length=64,
            blank=True,
            null=True
            )

    key = models.CharField(
            "WiFi key",
            max_length=32
            )

    ip = models.GenericIPAddressField(
            "Configuration IP",
            protocol="ipv4",
            blank=True,
            null=True
            )

    user = models.CharField(
            "Configuration User Name",
            max_length=32,
            blank=True,
            null=True
            )

    password = models.CharField(
            "Configuration Password",
            max_length=32,
            blank=True,
            null=True
            )

    def __str__(this):
        return "%s (%s)" % (this.serial, this.ssid)


class Device(models.Model):
    serial = models.CharField(
            "Device Serial Number",
            max_length=12,
            unique=True
            )

    name = models.CharField(
            "Common Name",
            max_length=100,
            default="",
            blank=True,
            null=True
            )

    model = models.ForeignKey(
            Model,
            on_delete=models.CASCADE
            )

    organization = models.ForeignKey(
            Organization,
            on_delete=models.CASCADE
            )

    network = models.ForeignKey(
            Network,
            on_delete=models.SET_NULL,
            blank=True,
            null=True
            )

    wifi = models.ManyToManyField(
            Wifi,
            blank=True
            )

    curip = models.GenericIPAddressField(
            "Current IP Address",
            protocol="ipv4",
            blank=True,
            null=True
            )

    lasttime = models.DateTimeField(
            "Last Received IP",
            blank=True,
            null=True,
            editable=False
            )

    lastbeat = models.DateTimeField(
            "Last Received Timestamp",
            blank=True,
            null=True,
            editable=False
            )

    secret = models.CharField(
            "Secret",
            default=getRandom,
            max_length=128
            )

    password = models.CharField(
            "Device Password",
            default=getRandom,
            max_length=128
            )

    vpnconfig = models.TextField(
            "VPN Configuration",
            blank=True,
            null=True,
            editable=False
            )

    update = models.BooleanField(
            "Trigger Firmware Update",
            default=False
            )

    reboot = models.BooleanField(
            "Trigger Reboot",
            default=False
            )

    changed = models.DateTimeField(
            "Last Change of Device Config",
            auto_now_add=True
            )

    wireless = models.DateTimeField(
            "Last Update of Wireless Config",
            blank=True,
            null=True,
            editable=False
            )

    ssid = models.CharField(
            "Broadcast SSID",
            max_length=32,
            blank=True,
            null=True
            )

    key = models.CharField(
            "Broadcast WPA2 Key",
            max_length=64,
            blank=True,
            null=True
            )

    mac = MACAddressField(
            "Device MAC",
            null=True,
            blank=True
            )

    def __str__(self):
        return "%s%s" % (self.serial, " (%s)" % self.ssid if self.ssid else "")

    def firmware(self):
        FWDIR = "/opt/vpnmanager/images/"

        try:
            fwfile = glob.glob(FWDIR + str(self.id) + ".bin")[0]
            tz = timezone.get_current_timezone()
            return datetime.fromtimestamp(os.path.getmtime(fwfile), tz)
        except Exception:
            return None

    def upgrade_available(self):
        if self.firmware():
            return self.firmware() < self.model.firmware
        return True


class DeviceLog(models.Model):
    ADD = 0
    REMOVE = 1
    NAME = 2
    NET = 3
    REBOOT = 4
    UPDATE = 5
    STATUS = 6
    INTERNALIP = 7
    WIFI = 8
    ORGA = 9

    ACTION_CHOICES = (
            (ADD, "ADD"),
            (REMOVE, "REMOVE"),
            (NAME, "NAME"),
            (NET, "NET"),
            (REBOOT, "REBOOT"),
            (UPDATE, "UPDATE"),
            (STATUS, "STATUS"),
            (INTERNALIP, "INTERNALIP"),
            (WIFI, "WIFI"),
            (ORGA, "ORGA")
            )

    objid = models.CharField(
            "Device ID",
            max_length=64
            )

    user = models.CharField(
            "User Name",
            max_length=128,
            null=True
            )

    date = models.DateTimeField(
            "Action Date",
            auto_now_add=True
            )

    action = models.IntegerField(
            "Action",
            choices=ACTION_CHOICES
            )

    oldvalue = models.CharField(
            "Old Value",
            max_length=256,
            blank=True,
            null=True
            )

    newvalue = models.CharField(
            "New Value",
            max_length=256,
            blank=True,
            null=True
            )


class UserLog(models.Model):
    ADD = 0
    REMOVE = 1
    NAME = 2
    MAIL = 3
    STAFF = 4
    SUPERUSER = 5
    ORGA = 6

    ACTION_CHOICES = (
            (ADD, "ADD"),
            (REMOVE, "REMOVE"),
            (NAME, "NAME"),
            (MAIL, "MAIL"),
            (STAFF, "STAFF"),
            (SUPERUSER, "SUPERUSER"),
            (ORGA, "ORGA")
            )

    objid = models.CharField(
            "Target User Name",
            max_length=64
            )

    user = models.CharField(
            "Source User Name",
            max_length=128,
            null=True
            )

    date = models.DateTimeField(
            "Action Date",
            auto_now_add=True
            )

    action = models.IntegerField(
            "Action",
            choices=ACTION_CHOICES
            )

    oldvalue = models.CharField(
            "Old Value",
            max_length=256,
            blank=True,
            null=True
            )

    newvalue = models.CharField(
            "New Value",
            max_length=256,
            blank=True,
            null=True
            )


class WifiLog(models.Model):
    ADD = 0
    REMOVE = 1
    NAME = 2
    SSID = 3
    KEY = 4
    ORGA = 5

    ACTION_CHOICES = (
            (ADD, "ADD"),
            (REMOVE, "REMOVE"),
            (NAME, "NAME"),
            (SSID, "SSID"),
            (KEY, "KEY"),
            (ORGA, "ORGA")
            )

    objid = models.CharField(
            "Wifi Name",
            max_length=64
            )

    user = models.CharField(
            "User Name",
            max_length=128,
            null=True
            )

    date = models.DateTimeField(
            "Action Date",
            auto_now_add=True
            )

    action = models.IntegerField(
            "Action",
            choices=ACTION_CHOICES
            )

    oldvalue = models.CharField(
            "Old Value",
            max_length=256,
            blank=True,
            null=True
            )

    newvalue = models.CharField(
            "New Value",
            max_length=256,
            blank=True,
            null=True
            )


class Notification(models.Model):
    NOTICE = 0
    ALERT = 1
    EMERGENCY = 2

    STATUS_CHOICES = (
            (NOTICE, "NOTICE"),
            (ALERT, "ALERT"),
            (EMERGENCY, "EMERGENCY")
            )

    status = models.IntegerField(
            "Status",
            choices=STATUS_CHOICES
            )

    text = models.CharField(
            "Notification Text",
            max_length=1024
            )

    expiry = models.DateTimeField(
            "Notification Expiry",
            null=True,
            blank=True
            )

    on_login = models.BooleanField(
            "Display Notification on Login Screen",
            default=False
            )


class UserStatus(models.Model):
    user = models.OneToOneField(
            settings.AUTH_USER_MODEL,
            on_delete=models.CASCADE
            )

    last_action = models.DateTimeField(
            null=True,
            blank=True
            )

    orga = models.ForeignKey(
            Organization,
            on_delete=models.SET_NULL,
            null=True
            )