from django.db.models import Count
from django.shortcuts import render, redirect
from django.contrib.auth import login, logout, authenticate
from django.views.decorators.http import require_http_methods
from django.views.decorators.csrf import ensure_csrf_cookie
from django.http import HttpResponse, HttpResponseRedirect
from django.contrib.auth.decorators import permission_required, login_required
from django.conf import settings
from django.core.mail import send_mail

import logging
import requests
from dealer.git import git

from members.views.utils import *
from kaehmy.models import Application, CustomRole, PresetRole, TelegramChannel
from kaehmy.forms import ApplicationForm, CommentForm
from kaehmy.tables import ExportTable
from webapp.utils import send_email


@ensure_csrf_cookie
@require_http_methods(["GET"])
def list_view(request, *args, **kwargs):
    """Kaehmy application list"""

    role_filter = request.GET.get('role', None)
    if role_filter is not None and str(role_filter) != '-1':
        applications = Application.objects.filter(custom_roles__id=role_filter) | Application.objects.filter(preset_roles__id=role_filter)
    else:
        applications = Application.objects.all()

    applications = applications.order_by('-timestamp')
    filter_options_preset = PresetRole.objects.annotate(form_count=Count('forms')).filter(form_count__gt=0)
    filter_options_preset_list = [(r.id, r.name, r.form_count) for r in filter_options_preset]
    filter_options_custom = CustomRole.objects.annotate(form_count=Count('forms')).filter(form_count__gt=0)
    filter_options_custom_list = [(r.id, r.name, r.form_count) for r in filter_options_custom]

    filter_options = filter_options_preset_list + filter_options_custom_list
    filter_options.sort(key=lambda f: f[1])

    context = {
        'applications': applications,
        'application_count': len(applications),
        'filter_options': filter_options
    }

    return render(request, 'kaehmy:list.html', context)


@ensure_csrf_cookie
@require_http_methods(["POST"])
def comment(request, *args, **kwargs):
    """POST endpoint for commenting"""

    form = CommentForm(request.POST)
    if form.is_valid():
        comment = form.save()
        email = comment.parent.email
        name = comment.name

        subject = 'Kaehmyysi tai kommenttiisi on vastattu!'
        body = ('{} on vastannut kaehmyhakemukseesi tai kommenttiisi kaehmypalvelussa.\r\n\r\n'
                'Käy lukemassa viesti osoitteessa http://sika.sahkoinsinoorikilta.fi/kaehmy').format(name.capitalize())

        send_email(email, subject, body)
        logging.debug(
            'Sent kaehmy comment email to recipient <{}>'.format(email))

        return redirect('/kaehmy')
    else:
        context = {
            'error': form.errors
        }
        return render(request, 'kaehmy:error.html', context)


@require_http_methods(["GET"])
def statistics_view(request, *args, **kwargs):
    """Kaehmys roles listed by applications"""

    applications = Application.objects.all()
    role_list = []

    preset_roles = PresetRole.objects.all()
    custom_roles = CustomRole.objects.all()

    for preset in preset_roles:
        people = [form.name for form in preset.forms.all()]
        role_list.append((preset.name, len(people), ', '.join(people)))
    for custom in custom_roles:
        people = [form.name for form in custom.forms.all()]
        role_list.append((custom.name, len(people), ', '.join(people)))

    context = {
        'applications': applications,
        'application_count': len(applications),
        'role_list': role_list
    }
    return render(request, 'kaehmy:statistics.html', context)


@require_http_methods(["GET"])
def view(request, *args, **kwargs):
    """Render Kaehmy form page."""
    form = ApplicationForm()
    return render(request, 'kaehmy:kaehmy.html', {'form': form})


@ensure_csrf_cookie
@require_http_methods(["POST"])
def submit(request, *args, **kwargs):
    """Submit Kaehmy form."""
    form = ApplicationForm(request.POST)
    if form.is_valid():
        application = form.save()
        custom_name = form.cleaned_data.get('custom_role_name')
        custom_is_board = form.cleaned_data.get('custom_role_is_board')

        if len(custom_name) > 0:
            custom_role = CustomRole(
                name=custom_name, is_board=custom_is_board)
            custom_role.save()
            application.custom_roles.add(custom_role)

        url = 'https://sika.sahkoinsinoorikilta.fi/kaehmy'

        email = form.cleaned_data.get('email', '')
        name = form.cleaned_data.get('name', 'Anonymous')
        subject = 'Arwokas kirjattu kirje mahdolliselle tulewalle kiltahenkilölle'
        body = ('Moikka {}!\r\n\r\nHienoa, että kilta kiinnostaa! Kaehmysi on vastaanotettu.\r\n'
                'Mahdollisista kommenteista tulee ilmoitus sähköpostitse.\r\n\r\n'
                'Käy katsomassa kaehmytilanne osoitteessa {}').format(name, url)

        send_email(email, subject, body)
        logging.debug('Sent kaehmy email to recipient <{}>'.format(email))

        CHAT_IDS = [channel.channel_id for channel in TelegramChannel.objects.all()]
        for chat_id in CHAT_IDS:
            tg_string = 'https://api.telegram.org/bot{}/sendMessage?chat_id={}&text={}'.format(
                settings.TELEGRAM_BOT_TOKEN,
                chat_id,
                'Uusi New kaehmy! {} -> {}'.format(name, url)
            )
            response = requests.get(tg_string).json()
            logging.debug('Telegram API response:\n{}'.format(response))
        logging.debug('Sent kaehmy announcement to {} channels.'.format(len(CHAT_IDS)))

    else:
        context = {
            'error': form.errors
        }
        return render(request, 'kaehmy:error.html', context)
    return HttpResponseRedirect('/kaehmy')


@require_http_methods(['GET'])
def export_view(request, *args, **kwargs):
    def make_table(queryset):
        table = ExportTable(queryset,
                                  request=request,
                                  exclude=['id'],
                                  attrs={'class': 'table table-bordered table-hover'})

        table.paginate(page=request.GET.get('page', 1), per_page=9999)
        table_html = convert_table_to_html(table, request)
        return table_html

    kaehmys = Application.objects.all()
    non_board = filter(lambda q: not q.has_any_board_role(), kaehmys)
    board = filter(lambda q: q.has_any_board_role(), kaehmys)

    context = {
        'non_board_table': make_table(non_board),
        'board_table': make_table(board),
    }
    return render(request, 'kaehmy:export.html', context)