from django.shortcuts import render
from django.http import HttpResponse
from django.template import loader
from django.shortcuts import redirect
from django.conf import settings
from django.urls import reverse
from django.contrib.auth.models import Group

import pprint
import vyos

from .models import Instance

from django.contrib.auth.models import User
from django.contrib.auth.models import Group

from django.template.defaultfilters import register




@register.filter
def get_item(dictionary, key):
    return dictionary.get(key)



def index(request):
    if not request.user.is_authenticated:
        return redirect('%s?next=%s' % (reverse('registration-login'), request.path))
        
    #interfaces = vyos.get_interfaces()
    all_instances = vyos.instance_getall()
    hostname_default = vyos.get_hostname_prefered(request)


    template = loader.get_template('config/instance.html')
    context = { 
        #'interfaces': interfaces,
        'instances': all_instances,
        'hostname_default': hostname_default,
    }   
    return HttpResponse(template.render(context, request))


def users_list(request):
    if not request.user.is_authenticated:
        return redirect('%s?next=%s' % (reverse('registration-login'), request.path))
        
    #interfaces = vyos.get_interfaces()
    all_instances = vyos.instance_getall()
    hostname_default = vyos.get_hostname_prefered(request)
    users = User.objects.all()
    groups = Group.objects.all()

    group_show = []
    for group in groups:
        if group.name != "admin":
            group_show.append(group.name)


    has_group_add = False
    for el in request.POST:

        if el.startswith('group-') and request.POST[el]:
            pos = el.split("-", 1)
            
            el_username = pos[1]
            el_groupname = request.POST[el]
            
            # test also if username is member of admin or superuser, than this one should not being no group
            if el_groupname not in ['admin']:
                try:
                    el_userid = User.objects.get(username=el_username) 
                except User.DoesNotExist:
                    return redirect('config:users_list')

                try:
                    # remove any group user is inside, we support just only group per user
                    if el_userid.groups.exists():
                        for g in el_userid.groups.all():
                            el_userid.groups.remove(g)

                    el_groupadd = Group.objects.get(name=el_groupname) 
                    el_groupadd.user_set.add(el_userid)
                    has_group_add = has_group_add  + 1
                except Group.DoesNotExist:
                    return redirect('config:users_list')

    if has_group_add > 0:
        return redirect('config:users-list')


    user_groups = {}
    for user in users:
        user_groups_list = user.groups.all()
        if len(user_groups_list) > 0:
            user_groups[str(user)] = str(user_groups_list[0])
        else:
            user_groups[str(user)] = None

    template = loader.get_template('config/users_list.html')
    context = { 
        #'interfaces': interfaces,
        'instances': all_instances,
        'hostname_default': hostname_default,
        'users' : users,
        'groups': group_show,
        'user_groups': user_groups
    }   
    return HttpResponse(template.render(context, request))


def groups_list(request):
    if not request.user.is_authenticated:
        return redirect('%s?next=%s' % (reverse('registration-login'), request.path))


    #interfaces = vyos.get_interfaces()
    all_instances = vyos.instance_getall()
    hostname_default = vyos.get_hostname_prefered(request)
    groups = Group.objects.all()


    template = loader.get_template('config/groups_list.html')
    context = { 
        #'interfaces': interfaces,
        'instances': all_instances,
        'hostname_default': hostname_default,
        'groups' : groups,
    }   
    return HttpResponse(template.render(context, request))




def instances(request):
    if not request.user.is_authenticated:
        return redirect('%s?next=%s' % (reverse('registration-login'), request.path))
        
    all_instances = vyos.instance_getall()
    hostname_default = vyos.get_hostname_prefered(request)

    print(all_instances)

    if hostname_default == None:
        if all_instances.count() > 0:
            for i in all_instances:
                pprint.pprint(i.hostname)
                instance_default(request, i.hostname)
            
        else:
            return redirect('config:instance-add')

    template = loader.get_template('config/instances.html')
    context = { 
        'instances': all_instances,
        'hostname_default': hostname_default,

    }   
    return HttpResponse(template.render(context, request))

def instance_add(request):
    if not request.user.is_authenticated:
        return redirect('%s?next=%s' % (reverse('registration-login'), request.path))
        
    #interfaces = vyos.get_interfaces()
    all_instances = vyos.instance_getall()
    hostname_default = vyos.get_hostname_prefered(request)

    if len(request.POST) > 0:
        instance = Instance()
        instance.alias = request.POST['alias']
        instance.hostname = request.POST['hostname']
        instance.port = request.POST['port']
        instance.key = request.POST['key']
        if 'https' in request.POST:
            instance.https = request.POST['https']
        else:
            instance.https = False
        instance_id = instance.save()
        return redirect('config:instances')
    else:
        instance_id = 0

    template = loader.get_template('config/instance_add.html')
    context = { 
        'hostname_default': hostname_default,
        'instance_id': instance_id,
        'instances': all_instances,
    }   
    return HttpResponse(template.render(context, request))



def group_add(request):
    if not request.user.is_authenticated:
        return redirect('%s?next=%s' % (reverse('registration-login'), request.path))
        
    #interfaces = vyos.get_interfaces()
    all_instances = vyos.instance_getall()
    hostname_default = vyos.get_hostname_prefered(request)

    error_message = None

    if len(request.POST) > 0 and 'name' in request.POST:
        try:
            group_get = Group.objects.get(name=request.POST['name'])       
            error_message = 'Group already exists'
        except Group.DoesNotExist:
            group_create = Group(name=request.POST['name'])
            group_create.save()
            return redirect('config:groups-list')
    else:
        instance_id = 0

    template = loader.get_template('config/group_add.html')
    context = { 
        'hostname_default': hostname_default,
        'instance_id': instance_id,
        'instances': all_instances,
        'error_message' : error_message
    }   
    return HttpResponse(template.render(context, request)) 

    
def user_add(request):
    if not request.user.is_authenticated:
        return redirect('%s?next=%s' % (reverse('registration-login'), request.path))
        
    #interfaces = vyos.get_interfaces()
    all_instances = vyos.instance_getall()
    hostname_default = vyos.get_hostname_prefered(request)

    error_message = None

    count = 0
    name = ''
    if 'name' in request.POST:
        name = request.POST['name']
        count += 1

    username = ''
    if 'username' in request.POST:
        username = request.POST['username']
        count += 1

    password = ''
    if 'password' in request.POST:
        password = request.POST['password']
        count += 1

    email = ''
    if 'email' in request.POST:
        email = request.POST['email']                        
        count += 1

    if count >= 4:
        try:
            user = User.objects.get(username=username)       
            error_message = 'Username already exists'
        except User.DoesNotExist:
            user_create = User(
                username=username,
                email=email,
                password=password,
                last_name=name
            )
            user_create.save()
            return redirect('config:users-list')


    template = loader.get_template('config/user_add.html')
    context = { 
        'hostname_default': hostname_default,
        'instances': all_instances,
        'error_message' : error_message,
        'name' : name,
        'username' : username,
        'password' : password,
        'email' : email,

    }   
    return HttpResponse(template.render(context, request))    



def instance_conntry(request, hostname):
    if not request.user.is_authenticated:
        return redirect('%s?next=%s' % (reverse('registration-login'), request.path))
        
    all_instances = vyos.instance_getall()
    hostname_default = vyos.get_hostname_prefered(request)

    # permcheck
    instance = Instance.objects.get(hostname=hostname)
    connected = vyos.conntry(hostname)
    if connected == True:
        request.session['hostname'] = hostname


    template = loader.get_template('config/instance_conntry.html')
    context = { 
        'instance': instance,
        "connected": connected,
        'instances': all_instances,
        'hostname_default': hostname_default,
    }   
    return HttpResponse(template.render(context, request))


def instance_default(request, hostname):
    if not request.user.is_authenticated:
        return redirect('%s?next=%s' % (reverse('registration-login'), request.path))
        
    all_instances = vyos.instance_getall()

    # permcheck
    instance = Instance.objects.get(hostname=hostname)
    
    connected = vyos.conntry(hostname)
    # show some error when not connected
    if connected == True:
        request.session['hostname'] = hostname
        instance.main = True
        instance.save()

    return redirect('config:instances')



def instance_remove(request, hostname):
    if not request.user.is_authenticated:
        return redirect('%s?next=%s' % (reverse('registration-login'), request.path))
        
    all_instances = vyos.instance_getall()

    # permcheck
    instance = Instance.objects.get(hostname=hostname)
    
    hostname_default = vyos.get_hostname_prefered(request)

    #if hostname_default != hostname:
    instance.delete()

    return redirect('config:instances')