from django.shortcuts import render
from django.contrib.auth.decorators import permission_required
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.core.mail import send_mail
from django.conf import settings
from django.utils.translation import ugettext as _

import json
import requests
import logging
import html
import csv

from members.models import Member, Request, Payment
from members.forms import MemberForm, PaymentForm, ApplicationForm

# Logger function, you can use the same idea when implementing other loggers to other apps
from members.tables import MemberTable, PaymentTable, RequestTable

memberlogger = logging.getLogger(__name__)
logging.basicConfig(format='[%(levelname)s]%(asctime)s %(message)s', level=settings.LOGGERLEVEL, filename=settings.LOGPATH)


def validate_recaptcha(response):
    '''
    Recaptcha is used in member applications

    :param response:
    :return: Boolean, success or not
    '''

    values = {
        'secret': settings.GOOGLE_RECAPTCHA_SECRET_KEY,
        'response': response,
    }
    url = "https://www.google.com/recaptcha/api/siteverify"
    headers = {'Content-type': 'application/x-www-form-urlencoded'}
    resp = requests.post(url, values, headers=headers)
    try:
        result = json.loads(resp.text)
        memberlogger.info('Recaptcha response: {}'.format(result))
        return result["success"]
    except:
        return False


def send_mail_wrapper(subject, message):
    send_mail(subject,
              message,
              'no-reply@sahkoinsinoorikilta.fi',
              ['viestintamestari@sahkoinsinoorikilta.fi'],
              fail_silently=False)


def convert_table_to_html(table, request):
    '''
    This is a horrible hack for converting a table object to raw html.
    Even with extensive research I wasn't able to find a way to add a path
    prefix "e.g. /members/list" to the query strings "e.g. ?sort=foo", so I
    did it manually with string.replace.

    Note: When adding the html to a page, you need to run it through
    the "safe" filter. E.g. "{{ table|safe }}"

    :param table: Table object from members.tables
    :param request:  HttpRequest
    :return: Raw html string
    '''
    table_as_html = table.as_html(request)
    path = request.path

    fixed = table_as_html.replace(r'href="?', r'href="{}?'.format(path))
    return fixed


@ensure_csrf_cookie
@require_http_methods(["GET"])
@permission_required('members.change_member', login_url='/login')
def member_list(request, *args, **kwargs):
    members = Member.objects.all()

    table = MemberTable(members,
                        request=request,
                        exclude=['id'],
                        attrs={'class': 'table table-bordered table-hover'})

    table.paginate(page=request.GET.get('page', 1), per_page=25)
    table_html = convert_table_to_html(table, request)

    context = {
        'table': table_html,
        'member_count': len(members),
        'notification': request.GET.get('notification', None)
    }
    return render(request, 'member_list.html', context)


@ensure_csrf_cookie
@require_http_methods(["GET"])
@permission_required('members.change_member', login_url='/login')
def member_add(request, *args, **kwargs):
    form = MemberForm()
    return render(request, 'member_add.html', {'form': form})


@ensure_csrf_cookie
@require_http_methods(["GET"])
@permission_required('members.change_member', login_url='/login')
def member_delete_confirm(request, *args, **kwargs):
    i = kwargs.pop('index', None)
    if i is None:
        return render(request, 'error.html', {'error': _('No member id specified')})
    else:
        member = Member.objects.get(id=i)
        form = MemberForm(instance=member)
        return render(request, 'member_delete_confirm.html', {'member_id': i, 'form': form})


@ensure_csrf_cookie
@require_http_methods(["GET"])
@permission_required('members.change_member', login_url='/login')
def member_add_many(request, *args, **kwargs):
    return render(request, 'member_add_many.html', {})


@ensure_csrf_cookie
@require_http_methods(["POST"])
@permission_required('members.change_member', login_url='/login')
def member_submit(request, *args, **kwargs):
    form = MemberForm(request.POST)
    if form.is_valid():
        form.save()
        memberlogger.info("Saved new member to member register with the following info: {}".format(form))
        notification = "{} {} {}.".format(_("Successfully added member"),
                                          form.cleaned_data['last_name'],
                                          form.cleaned_data['first_name'])

        return HttpResponseRedirect('/members/list?notification={}'.format(html.escape(notification)))
    else:
        return render(request, 'error.html', {'error': form.errors})


@ensure_csrf_cookie
@require_http_methods(["POST"])
@permission_required('members.change_member', login_url='/login')
def member_update(request, *args, **kwargs):
    form = MemberForm(request.POST)
    if form.is_valid():
        id = request.POST['id']
        member = Member.objects.get(id=id)
        form = MemberForm(request.POST, instance=member)
        form.save()

        memberlogger.info("Updated member in member register with the following info: {}".format(form))
        notification = "{} {} {}.".format(_("Successfully updated member"),
                                          member.last_name, member.first_name)
        return HttpResponseRedirect('/members/list?notification={}'.format(html.escape(notification)))
    else:
        return render(request, 'error.html', {'error': _('Could not update member object')})


@ensure_csrf_cookie
@require_http_methods(["POST"])
@permission_required('members.change_member', login_url='/login')
def member_delete(request, *args, **kwargs):
    try:
        id = request.POST['id']
    except KeyError:
        return render(request, 'error.html', {'error': _('No member id specified')})

    try:
        member = Member.objects.get(id=id)
        notification = "{} {} {}.".format(_("Successfully deleted member"),
                                          member.last_name, member.first_name)
        member.delete()
        memberlogger.info("Delete member in member register with the following id: {}".format(id))
        return HttpResponseRedirect('/members/list?notification={}'.format(html.escape(notification)))
    except:
        return render(request, 'error.html', {'error': _('Could not delete member object')})


@ensure_csrf_cookie
@require_http_methods(["GET"])
@permission_required('members.change_member', login_url='/login')
def member_edit(request, *args, **kwargs):
    i = kwargs.pop('index', None)
    if i is None:
        return render(request, 'error.html', {'error': _('No member id specified')})
    else:
        member = Member.objects.get(id=i)
        form = MemberForm(instance=member)
        return render(request, 'member_edit.html', {'member_id': i, 'form': form})


@ensure_csrf_cookie
@require_http_methods(["GET"])
@permission_required('members.change_member', login_url='/login')
def application_list(request, *args, **kwargs):
    applications = Request.objects.all()
    application_count = len(applications)
    table = RequestTable(applications,
                         request=request,
                         exclude=['id'],
                         attrs={'class': 'table table-bordered table-hover'})

    table.paginate(page=request.GET.get('page', 1), per_page=25)
    table_html = convert_table_to_html(table, request)
    context = {
        'table': table_html,
        'application_count': application_count,
        'notification': request.GET.get('notification', None)
    }
    return render(request, 'application_list.html', context)


@ensure_csrf_cookie
@require_http_methods(["GET"])
@permission_required('members.change_member', login_url='/login')
def application_edit(request, *args, **kwargs):
    i = kwargs.pop('index', None)
    if i is None:
        return render(request, 'error.html', {'error': _('No application id specified')})
    else:
        application = Request.objects.get(id=i)
        form = ApplicationForm(instance=application)
        return render(request, 'application_edit.html', {'application_id': i, 'form': form})


@ensure_csrf_cookie
@require_http_methods(["POST"])
@permission_required('members.change_member', login_url='/login')
def application_accept(request, *args, **kwargs):
    form = ApplicationForm(request.POST)
    if form.is_valid():
        id = request.POST['id']
        application = Request.objects.get(id=id)

        member = application.to_member()
        member.save()
        application.delete()

        memberlogger.info("Accepted application in member register with the following info: {}".format(form))
        notification = "{} {}.".format(_("Successfully accepted application"), str(application))
        return HttpResponseRedirect('/members/list?notification={}'.format(html.escape(notification)))
    else:
        return render(request, 'error.html', {'error': _('Could not accept application object')})


@ensure_csrf_cookie
@require_http_methods(["POST"])
@permission_required('members.change_member', login_url='/login')
def application_delete(request, *args, **kwargs):
    try:
        id = request.POST['id']
    except KeyError:
        return render(request, 'error.html', {'error': _('No application id specified')})

    try:
        application = Request.objects.get(id=id)
        notification = "{} {}.".format(_("Successfully deleted application"), str(application))
        application.delete()
        memberlogger.info("Delete application in member register with the following id: {}".format(id))
        return HttpResponseRedirect('/members/applications?notification={}'.format(html.escape(notification)))
    except:
        return render(request, 'error.html', {'error': _('Could not delete application object')})


@ensure_csrf_cookie
@require_http_methods(["GET"])
@permission_required('members.change_member', login_url='/login')
def application_delete_confirm(request, *args, **kwargs):
    i = kwargs.pop('index', None)
    if i is None:
        return render(request, 'error.html', {'error': _('No application id specified')})
    else:
        application = Request.objects.get(id=i)
        form = ApplicationForm(instance=application)
        return render(request, 'application_delete_confirm.html', {'application_id': i, 'form': form})


@ensure_csrf_cookie
def application_form(request, *args, **kwargs):
    return render(request, 'application_index.html', {})


@ensure_csrf_cookie
def application_form_success(request, *args, **kwargs):
    return render(request, 'application_success.html', {})


@ensure_csrf_cookie
@require_http_methods(["GET"])
@permission_required('members.change_member', login_url='/login')
def payment_list(request, *args, **kwargs):
    payments = Payment.objects.all()

    table = PaymentTable(payments,
                         request=request,
                         exclude=['id'],
                         attrs={'class': 'table table-bordered table-hover'})

    table.paginate(page=request.GET.get('page', 1), per_page=25)
    table_html = convert_table_to_html(table, request)

    context = {
        'table': table_html,
        'payment_count': len(payments),
        'notification': request.GET.get('notification', None)
    }
    return render(request, 'payment_list.html', context)


@ensure_csrf_cookie
@require_http_methods(["GET"])
@permission_required('members.change_member', login_url='/login')
def payment_add(request, *args, **kwargs):
    form = PaymentForm()
    return render(request, 'payment_add.html', {'form': form})


@ensure_csrf_cookie
@require_http_methods(["POST"])
@permission_required('members.change_member', login_url='/login')
def payment_submit(request, *args, **kwargs):
    form = PaymentForm(request.POST)
    if form.is_valid():
        form.save()
        memberlogger.info("Saved new payment to member register with the following info: {}".format(form))
        notification = "{} {}.".format(_("Successfully added payment for member"),
                                       form.cleaned_data['member'])
        return HttpResponseRedirect('/members/payments?notification={}'.format(html.escape(notification)))
    else:
        return render(request, 'error.html', {'error': form.errors})


@ensure_csrf_cookie
@require_http_methods(["GET"])
@permission_required('members.change_member', login_url='/login')
def payment_edit(request, *args, **kwargs):
    i = kwargs.pop('index', None)
    if i is None:
        return render(request, 'error.html', {'error': _('No payment id specified')})
    else:
        payment = Payment.objects.get(id=i)
        form = PaymentForm(instance=payment)
        return render(request, 'payment_edit.html', {'payment_id': i, 'form': form})


@ensure_csrf_cookie
@require_http_methods(["GET"])
@permission_required('members.change_member', login_url='/login')
def payment_delete_confirm(request, *args, **kwargs):
    i = kwargs.pop('index', None)
    if i is None:
        return render(request, 'error.html', {'error': _('No payment id specified')})
    else:
        payment = Payment.objects.get(id=i)
        form = PaymentForm(instance=payment)
        return render(request, 'payment_delete_confirm.html', {'payment_id': i, 'form': form})


@ensure_csrf_cookie
@require_http_methods(["POST"])
@permission_required('members.change_member', login_url='/login')
def payment_delete(request, *args, **kwargs):
    try:
        id = request.POST['id']
    except KeyError:
        return render(request, 'error.html', {'error': _('No payment id specified')})

    try:
        payment = Payment.objects.get(id=id)
        notification = "{} {}.".format(_("Successfully deleted payment"), str(payment))
        payment.delete()
        memberlogger.info("Delete payment '{}' in member register".format(str(payment)))
        return HttpResponseRedirect('/members/payments?notification={}'.format(html.escape(notification)))
    except:
        return render(request, 'error.html', {'error': _('Could not delete payment object')})


@ensure_csrf_cookie
@require_http_methods(["POST"])
@permission_required('members.change_member', login_url='/login')
def payment_update(request, *args, **kwargs):
    form = PaymentForm(request.POST)
    if form.is_valid():
        id = request.POST['id']
        payment = Payment.objects.get(id=id)
        form = PaymentForm(request.POST, instance=payment)
        form.save()

        memberlogger.info("Updated member in member register with the following info: {}".format(form))
        notification = "{} {}.".format(_("Successfully updated payment"), str(payment))
        return HttpResponseRedirect('/members/payments?notification={}'.format(html.escape(notification)))
    else:
        return render(request, 'error.html', {'error': _('Could not update payment object')})


@ensure_csrf_cookie
@require_http_methods(["GET"])
@permission_required('members.change_member', login_url='/login')
def settings_page(request, *args, **kwargs):
    return render(request, 'settings.html', {})


@ensure_csrf_cookie
@require_http_methods(["POST"])
@permission_required('members.change_member', login_url='/login')
def import_csv(request, *args, **kwargs):
    try:
        data = request.POST['textfield']
    except:
        return render(request, 'error.html', {'error': _('Missing "textfield" POST request field')})

    success = Member.from_csv(data)
    if success:
        memberlogger.info('Imported CSV data:\n'.format(data))
        notification = "{}.".format(_("Successfully imported multiple members"))
        return HttpResponseRedirect('/members/list?notification={}'.format(html.escape(notification)))
    else:
        return render(request, 'error.html', {'error': _('Failed to import members')})


@ensure_csrf_cookie
@require_http_methods(["GET"])
@permission_required('members.change_member', login_url='/login')
def export_csv(request, *args, **kwargs):
    response = HttpResponse()
    response['Content-type'] = 'text/csv'
    response['Accept'] = 'text/csv'
    response['Content-Disposition'] = 'filename; filename=members.csv'
    writer = csv.writer(response, csv.excel)
    response.write(u'\ufeff'.encode('utf8'))  # BOM (optional...Excel needs it to open UTF-8 file properly)
    for obj in Member.objects.all():
        data = obj.as_array()
        field_list = map(lambda d: str(d), data)

        writer.writerow(field_list)

    return response