# ~*~ coding: utf-8 ~*~

from __future__ import unicode_literals

import logging

from django.conf import settings
from django.contrib.auth import login as auth_login, logout as auth_logout
from django.contrib.messages.views import SuccessMessageMixin
from django.db.models import Q
from django.http import HttpResponseRedirect
from django.shortcuts import get_object_or_404, reverse, redirect
from django.utils.decorators import method_decorator
from django.utils.translation import ugettext as _
from django.urls import reverse_lazy
from django.views.decorators.cache import never_cache
from django.views.decorators.csrf import csrf_protect
from django.views.decorators.debug import sensitive_post_parameters
from django.views.generic.base import TemplateView
from django.views.generic.list import ListView
from django.views.generic.edit import CreateView, DeleteView, UpdateView, FormView
from django.views.generic.detail import DetailView

from common.utils import get_object_or_none

from .models import User, UserGroup
from .forms import UserCreateForm, UserUpdateForm, UserGroupForm, UserLoginForm
from .utils import AdminUserRequiredMixin, user_add_success_next, send_reset_password_mail


logger = logging.getLogger('jumpserver.users.views')


@method_decorator(sensitive_post_parameters(), name='dispatch')
@method_decorator(csrf_protect, name='dispatch')
@method_decorator(never_cache, name='dispatch')
class UserLoginView(FormView):
    template_name = 'users/login.html'
    form_class = UserLoginForm
    redirect_field_name = 'next'

    def get(self, request, *args, **kwargs):
        if request.user.is_staff:
            return redirect(request.POST.get(self.redirect_field_name, reverse('index')))
        return self.render_to_response(self.get_context_data(**kwargs))

    def form_valid(self, form):
        auth_login(self.request, form.get_user())
        return redirect(self.request.POST.get(self.redirect_field_name, reverse('index')))


@method_decorator(never_cache, name='dispatch')
class UserLogoutView(TemplateView):
    template_name = 'common/flash_message_standalone.html'

    def get(self, request, *args, **kwargs):
        auth_logout(request)
        return super(UserLogoutView, self).get(request)

    def get_context_data(self, **kwargs):
        context = {
            'title': _('Logout success'),
            'messages': _('Logout success, return login page'),
            'redirect_url': reverse('users:login'),
            'auto_redirect': True,
        }
        kwargs.update(context)
        return super(UserLogoutView, self).get_context_data(**kwargs)


class UserListView(AdminUserRequiredMixin, ListView):
    model = User
    paginate_by = settings.CONFIG.DISPLAY_PER_PAGE
    context_object_name = 'user_list'
    template_name = 'users/user_list.html'
    ordering = '-date_joined'

    def get_queryset(self):
        self.queryset = super(UserListView, self).get_queryset()
        self.keyword = keyword = self.request.GET.get('keyword', '')
        self.sort = sort = self.request.GET.get('sort')
        if keyword:
            self.queryset = self.queryset.filter(Q(username__icontains=keyword) |
                                                 Q(name__icontains=keyword))

        if sort:
            self.queryset = self.queryset.order_by(sort)
        return self.queryset

    def get_context_data(self, **kwargs):
        context = super(UserListView, self).get_context_data(**kwargs)
        context.update({'app': _('Users'), 'action': _('User list'), 'keyword': self.keyword})
        return context


class UserCreateView(AdminUserRequiredMixin, SuccessMessageMixin, CreateView):
    model = User
    form_class = UserCreateForm
    template_name = 'users/user_create.html'
    success_url = reverse_lazy('users:user-list')
    success_message = _('Create user <a href="%s">%s</a> success.')

    def get_context_data(self, **kwargs):
        context = super(UserCreateView, self).get_context_data(**kwargs)
        context.update({'app': _('Users'), 'action': _('Create user')})
        return context

    def form_valid(self, form):
        user = form.save(commit=False)
        user.created_by = self.request.user.username or 'System'
        user.save()
        user_add_success_next(user)
        return super(UserCreateView, self).form_valid(form)

    def get_success_message(self, cleaned_data):
        return self.success_message % (
            reverse_lazy('users:user-detail', kwargs={'pk': self.object.pk}),
            self.object.name,
        )


class UserUpdateView(AdminUserRequiredMixin, UpdateView):
    model = User
    form_class = UserUpdateForm
    template_name = 'users/user_update.html'
    context_object_name = 'user'
    success_url = reverse_lazy('users:user-list')

    def form_valid(self, form):
        username = self.object.username
        user = form.save(commit=False)
        user.username = username
        user.save()
        password = self.request.POST.get('password', '')
        if password:
            user.set_password(password)
        return super(UserUpdateView, self).form_valid(form)

    def form_invalid(self, form):
        print(form.errors)
        return super(UserUpdateView, self).form_invalid(form)

    def get_context_data(self, **kwargs):
        context = super(UserUpdateView, self).get_context_data(**kwargs)
        context.update({'app': _('Users'), 'action': _('Update user')})
        return context


class UserDeleteView(AdminUserRequiredMixin, DeleteView):
    model = User
    success_url = reverse_lazy('users:user-list')
    template_name = 'users/user_delete_confirm.html'


class UserDetailView(AdminUserRequiredMixin, DetailView):
    model = User
    template_name = 'users/user_detail.html'
    context_object_name = "user"

    def get_context_data(self, **kwargs):
        groups = [group for group in UserGroup.objects.iterator() if group not in self.object.groups.iterator()]
        context = {'app': _('Users'), 'action': _('User detail'), 'groups': groups}
        kwargs.update(context)
        return super(UserDetailView, self).get_context_data(**kwargs)


class UserGroupListView(AdminUserRequiredMixin, ListView):
    model = UserGroup
    paginate_by = settings.CONFIG.DISPLAY_PER_PAGE
    context_object_name = 'user_group_list'
    template_name = 'users/user_group_list.html'
    ordering = '-date_created'

    def get_queryset(self):
        self.queryset = super(UserGroupListView, self).get_queryset()
        self.keyword = keyword = self.request.GET.get('keyword', '')
        self.sort = sort = self.request.GET.get('sort')
        if keyword:
            self.queryset = self.queryset.filter(name__icontains=keyword)

        if sort:
            self.queryset = self.queryset.order_by(sort)
        return self.queryset

    def get_context_data(self, **kwargs):
        context = super(UserGroupListView, self).get_context_data(**kwargs)
        context.update({'app': _('Users'), 'action': _('User group list'), 'keyword': self.keyword})
        return context


class UserGroupCreateView(AdminUserRequiredMixin, CreateView):
    model = UserGroup
    form_class = UserGroupForm
    template_name = 'users/user_group_create.html'
    success_url = reverse_lazy('users:user-group-list')

    def get_context_data(self, **kwargs):
        context = super(UserGroupCreateView, self).get_context_data(**kwargs)
        users = User.objects.all()
        context.update({'app': _('Users'), 'action': _('Create user group'), 'users': users})
        return context

    def form_valid(self, form):
        user_group = form.save()
        users_id_list = self.request.POST.getlist('users', [])
        users = [get_object_or_404(User, id=user_id) for user_id in users_id_list]
        user_group.created_by = self.request.user.username or 'Admin'
        user_group.users.add(*tuple(users))
        user_group.save()
        return super(UserGroupCreateView, self).form_valid(form)


class UserGroupUpdateView(UpdateView):
    pass


class UserGroupDetailView(DetailView):
    pass


class UserGroupDeleteView(DeleteView):
    pass


class UserForgotPasswordView(TemplateView):
    template_name = 'users/forgot_password.html'

    def post(self, request, *args, **kwargs):
        email = request.POST.get('email')
        user = get_object_or_none(User, email=email)
        if not user:
            return self.get(request, errors=_('Email address invalid, input again'))
        else:
            send_reset_password_mail(user)
            return HttpResponseRedirect(reverse('users:forgot-password-sendmail-success'))


class UserForgotPasswordSendmailSuccessView(TemplateView):
    template_name = 'common/flash_message_standalone.html'

    def get_context_data(self, **kwargs):
        context = {
            'title': _('Send reset password message'),
            'messages': _('Send reset password mail success, login your mail box and follow it '),
            'redirect_url': reverse('users:login'),
        }
        kwargs.update(context)
        return super(UserForgotPasswordSendmailSuccessView, self).get_context_data(**kwargs)


class UserResetPasswordSuccessView(TemplateView):
    template_name = 'common/flash_message_standalone.html'

    def get_context_data(self, **kwargs):
        context = {
            'title': _('Reset password success'),
            'messages': _('Reset password success, return to login page'),
            'redirect_url': reverse('users:login'),
            'auto_redirect': True,
        }
        kwargs.update(context)
        return super(UserResetPasswordSuccessView, self).get_context_data(**kwargs)


class UserResetPasswordView(TemplateView):
    template_name = 'users/reset_password.html'

    def get(self, request, *args, **kwargs):
        token = request.GET.get('token')
        user = User.validate_reset_token(token)

        if not user:
            kwargs.update({'errors': _('Token invalid or expired')})
        return super(UserResetPasswordView, self).get(request, *args, **kwargs)

    def post(self, request, *args, **kwargs):
        password = request.POST.get('password')
        password_confirm = request.POST.get('password-confirm')
        token = request.GET.get('token')

        if password != password_confirm:
            return self.get(request, errors=_('Password not same'))

        user = User.validate_reset_token(token)
        if not user:
            return self.get(request, errors=_('Token invalid or expired'))

        user.reset_password(password)
        return HttpResponseRedirect(reverse('users:reset-password-success'))
