import datetime
from django.shortcuts import render, get_object_or_404
from django.http import HttpResponseRedirect
from django.urls import reverse
#from django.views import generic
from django.contrib.auth.decorators import login_required, permission_required
from django.forms import modelformset_factory, inlineformset_factory
from website.settings import APPLICATION_NAME
from .models import Network, Host, Channel, User, Message, Action, Notice, TempChannelKey, Join, Kick
from .forms import NetworkForm, HostForm, ChannelForm

def default_keywords(additional_keywords=None):
    default_keywords = 'RotBot, robot, bot, irc, irc bot, irc robot, '
    if additional_keywords:
        additional_keywords = ', '.join(map(str, additional_keywords))
        return (default_keywords + additional_keywords)
    return (default_keywords)


def networks(request):
    networks = Network.objects.all()
    hosts = Host.objects.all()
    channels = Channel.objects.all()
    users = User.objects.all()
    messages = Message.objects.all()
    actions = Action.objects.all()
    notices = Notice.objects.all()
    joins = Join.objects.all()
    kicks = Kick.objects.all()

    context = {
        'title': 'RotBot',
        'icon': 'robot',
        'description': 'Index of RotBot, the IRC robot.',
        'keywords': default_keywords('index'),
        'networks': networks,
        'total_networks': shorten_number(networks.count()),
        'total_hosts': shorten_number(hosts.count()),
        'total_chanels': shorten_number(channels.count()),
        'total_users': shorten_number(users.count()),
        'total_messages': shorten_number(total_messages(messages)),
        'total_actions': shorten_number(total_messages(actions)),
        'total_notices': shorten_number(total_messages(notices)),
        'total_joins': shorten_number(joins.count()),
        'total_kicks': shorten_number(kicks.count()),
    }
    return render(request, 'rotbot/networks.html', context)


def network(request, network_slug):
    network = get_object_or_404(Network, slug=network_slug)
    hosts = Host.objects.filter(network=network)
    channels = Channel.objects.filter(network=network)
    users = User.objects.filter(network=network)
    messages = Message.objects.filter(network=network)
    actions = Action.objects.filter(network=network)
    notices = Notice.objects.filter(network=network)
    joins = Join.objects.all()
    kicks = Kick.objects.all()

    for host in hosts:
        host.connection_fails = host.connection_attempts - host.connection_succeeds

    context = {
        'parent_title': 'Networks',
        'parent_url': reverse('rotbot:networks'),
        'parent_icon': 'robot',
        'title': network.name,
        'icon': 'sitemap',
        'description': 'Details of ' + network.name,
        'keywords': default_keywords() + 'network.name, display, details',
        'network': network,
        'hosts': hosts,
        'channels': channels,
        'total_hosts': shorten_number(hosts.count()),
        'total_chanels': shorten_number(channels.count()),
        'total_users': shorten_number(users.count()),
        'total_messages': shorten_number(total_messages(messages)),
        'total_actions': shorten_number(total_messages(actions)),
        'total_notices': shorten_number(total_messages(notices)),
        'total_joins': shorten_number(joins.count()),
        'total_kicks': shorten_number(kicks.count()),
    }
    return render(request, 'rotbot/network.html', context)


@login_required
@permission_required('rotbot.change_network', raise_exception=True)
def edit_network(request, network_slug):
    network = get_object_or_404(Network, slug=network_slug)
    title = network.name
    HostFormSet = inlineformset_factory(Network, Host, form=HostForm)
    if request.method == 'POST':
        form = NetworkForm(request.POST, instance=network)
        formset = HostFormSet(request.POST, instance=network)
        if form.is_valid() and formset.is_valid():
            form.save()
            formset.save()
            return HttpResponseRedirect(reverse('rotbot:network', args=(network.slug,)))
    else:
        form = NetworkForm(instance=network)
        formset = HostFormSet(instance=network)
    context = {
        'parent_title': 'Networks',
        'parent_url': reverse('rotbot:networks'),
        'parent_icon': 'robot',
        'title': title,
        'icon': 'sitemap',
        'description': 'Edit ' + title,
        'keywords': default_keywords((title, 'edit')),
        'network_slug': network_slug,
        'form': form,
        'hostformset': formset,
    }
    return render(request, 'rotbot/edit_network.html', context)

@login_required
@permission_required('rotbot.add_network', raise_exception=True)
def add_network(request):
    HostFormSet = inlineformset_factory(Network, Host, form=HostForm)
    if request.method == 'POST':
        form = NetworkForm(request.POST)
        if form.is_valid():
            network = form.save()
            formset = HostFormSet(request.POST, instance=network)
            if formset.is_valid():
                formset.save()
                return HttpResponseRedirect(reverse('rotbot:network', args=(form.cleaned_data['slug'],)))
        else:
            formset = HostFormSet(queryset=Host.objects.none())
    else:   # Not a POST request.
        form = NetworkForm()
        formset = HostFormSet(queryset=Host.objects.none())
    context = {
        'parent_title': 'Networks',
        'parent_url': reverse('rotbot:networks'),
        'parent_icon': 'robot',
        'title': 'Add network',
        'icon': 'sitemap',
        'description': 'Add new irc network to ' + APPLICATION_NAME,
        'keywords': default_keywords() + 'add, add network',
        'form': form,
        'hostformset': formset,
    }
    return render(request, 'rotbot/add_network.html', context)


@login_required
@permission_required('rotbot.change_network', raise_exception=True)
def delete_network(request, network_slug):
    network = get_object_or_404(Network, slug=network_slug)
    network.delete()
    return HttpResponseRedirect(reverse('rotbot:networks'))

def channel(request, channel_slug):
    channel = get_object_or_404(Channel, slug=channel_slug)
    network = Network.objects.get(id=channel.network.id)
    messages = Message.objects.filter(channel=channel)
    actions = Action.objects.filter(channel=channel)
    notices = Notice.objects.filter(channel=channel)
    joins = Join.objects.filter(channel=channel)
    kicks = Kick.objects.filter(channel=channel)

    context = {
        'parent_title': network.name,
        'parent_url': reverse('rotbot:network', args=(network.slug,)),
        'parent_icon': 'sitemap',
        'title': channel.name,
        'icon': 'hashtag',
        'description': 'Details of channel %s on network %s' % (channel.name, network.name),
        'keywords': default_keywords() + '%s, %s' % (network.name, channel.name),
        'channel': channel,
        'network': network,
        'total_messages': shorten_number(total_messages(messages)),
        'total_actions': shorten_number(total_messages(actions)),
        'total_notices': shorten_number(total_messages(notices)),
        'total_joins': shorten_number(joins.count()),
        'total_kicks': shorten_number(kicks.count()),
    }
    return render(request, 'rotbot/channel.html', context)

@login_required
@permission_required('rotbot.change_channel', raise_exception=True)
def channel_settings(request, channel_slug):
    channel = get_object_or_404(Channel, slug=channel_slug)
    network = Network.objects.get(id=channel.network_id)

    if request.method == 'POST':
        form = ChannelForm(request.POST, instance=channel)
        if form.is_valid():
            form.save()
            return HttpResponseRedirect(reverse('rotbot:channel', args=(channel.slug,)))

    else:
        form = ChannelForm(instance=channel)

    context = {
        'parent_title': network.name,
        'parent_url': reverse('rotbot:network', args=(network.slug,)),
        'parent_icon': 'sitemap',
        'title': channel.name,
        'icon': 'hashtag',
        'description': 'Change settings for channel %s on network %s' % (channel.name, network.name),
        'keywords': default_keywords() + 'settings, %s, %s' % (network.name, channel.name),
        'channel_slug': channel.slug,
        'network_slug': network.slug,
        'form': form,
    }
    return render(request, 'rotbot/channel_settings.html', context)

def ircauth_channel_settings(request, temp_key):
    key = get_object_or_404(TempChannelKey, key=temp_key)
    channel = Channel.objects.get(id=key.channel_id)
    network = Network.objects.get(id=key.network_id)
    if key.created > datetime.datetime.now() - datetime.timedelta(minute=10):
        key_expired = False
    else:
        key_expired = True

    if request.method == 'POST':
        if recent_key:
            form = ChannelForm(request.POST, instance=channel)
            if form.is_valid():
                form.save()
                key.delete()
                return HttpResponseRedirect(reverse('rotbot:channel', args=(channel.slug,)))

    else:
        form = ChannelForm(instance=channel)
    context = {
        'parent_title': network.name,
        'parent_url': reverse('rotbot:network', args=(network.slug,)),
        'parent_icon': 'sitemap',
        'title': channel.name,
        'icon': 'hashtag',
        'description': 'Change settings for channel %s on network %s' % (channel.name, network.name),
        'keywords': default_keywords() + 'settings, %s, %s' % (network.name, channel.name),
        'channel_slug': channel.slug,
        'network_slug': network.slug,
        'form': form,
        'temp_key': temp_key,
        'key_expired': key_expired,
    }
    return render(request, 'rotbot/channel_settings.html', context)


def user(request, user_slug):
    user = get_object_or_404(User, slug=user_slug)
    network = Network.objects.get(id=user.network.id)
    messages = Message.objects.filter(user=user)
    actions = Action.objects.filter(user=user)
    notices = Notice.objects.filter(user=user)
    joins = Join.objects.filter(user=user)
    kicks = Kick.objects.filter(kicker=user)
    kicked = Kick.objects.filter(kicked=user)

    context = {
        'parent_title': network.name,
        'parent_url': reverse('rotbot:network', args=(network.slug,)),
        'parent_icon': 'sitemap',
        'title': user.name,
        'icon': 'hashtag',
        'description': 'Details of user %s on network %s' % (user.name, network.name),
        'keywords': default_keywords() + '%s, %s' % (network.name, user.name),
        'user': user,
        'network': network,
        'total_messages': shorten_number(total_messages(messages)),
        'total_actions': shorten_number(total_messages(actions)),
        'total_notices': shorten_number(total_messages(notices)),
        'total_joins': shorten_number(joins.count()),
        'total_kicks': shorten_number(kicked.count()),
        'total_kicked': shorten_number(kicked.count()),
    }
    return render(request, 'rotbot/user.html', context)

# Helpers
def total_messages(messages):
    total_messages = 0
    for message in messages:
        total_messages += message.amount
    return total_messages

def shorten_number (number):
    if len(str(number)) > 20:
        number = str(int(number /1000000000000000000)) +"E"
    elif len(str(number)) > 17:
        number = str(int(number /1000000000000000)) +"P"
    elif len(str(number)) > 14:
        number = str(int(number /1000000000000)) +"T"
    elif len(str(number)) > 11:
        number = str(int(number /1000000000)) +"G"
    elif len(str(number)) > 8:
        number = str(int(number /1000000)) +"M"
    elif len(str(number)) > 5:
        number = str(int(number /1000)) + "K"
    elif len(str(number)) > 4:
        number = str(int(number /100)) + "h"
    else:
        number = int(number)
    return str(number)