# -*- mode: python; coding: utf-8 -*-
# Copyright (C) 2017-2019 by BDE ENS Paris-Saclay
# SPDX-License-Identifier: GPL-3.0-or-later

from django.contrib import admin
from django.contrib import messages
from django.contrib.auth.admin import UserAdmin as BaseUserAdmin
from django.contrib.auth.forms import PasswordResetForm
from django.urls import reverse
from django.utils.html import format_html
from django.utils.translation import ugettext_lazy as _
from reversion.admin import VersionAdmin

from med.admin import admin_site
from .forms import UserCreationAdminForm
from .models import Adhesion, Clef, User


class ClefAdmin(VersionAdmin):
    list_display = ('name', 'owner', 'comment')
    ordering = ('name',)
    search_fields = ('name', 'owner__username', 'comment')
    autocomplete_fields = ('owner',)


class AdhesionAdmin(VersionAdmin):
    list_display = ('starting_in', 'ending_in')
    autocomplete_fields = ('members',)


class IsMemberFilter(admin.SimpleListFilter):
    title = _('membership status')
    parameter_name = 'is_member'

    def lookups(self, request, model_admin):
        return (
            ('Yes', _('Yes')),
        )

    def queryset(self, request, queryset):
        value = self.value()
        if value == 'Yes':
            # Get current membership year and list all members
            last_adh_year = Adhesion.objects.all().order_by('starting_in') \
                .reverse().first()
            return last_adh_year.members
        return queryset


class UserAdmin(VersionAdmin, BaseUserAdmin):
    # Customize admin to add more fields
    fieldsets = (
        (None, {'fields': ('username', 'password')}),
        (_('Personal info'), {'fields': ('first_name', 'last_name', 'email',
                                         'telephone', 'address', 'comment')}),
        (_('Permissions'), {'fields': ('is_active', 'is_staff', 'is_superuser',
                                       'groups', 'user_permissions',
                                       'maxemprunt')}),
        (_('Important dates'), {'fields': ('last_login', 'date_joined')}),
    )
    list_display = ('username', 'email', 'first_name', 'last_name',
                    'maxemprunt', 'is_member', 'is_staff')
    list_filter = (IsMemberFilter, 'is_staff', 'is_superuser', 'is_active',
                   'groups')

    # Customize required initial fields
    add_form_template = 'admin/change_form.html'
    add_form = UserCreationAdminForm
    add_fieldsets = (
        (None, {
            'classes': ('wide',),
            'fields': ("username", "email", "first_name", "last_name",
                       "address", "telephone"),
        }),
    )

    def save_model(self, request, obj, form, change):
        """
        On creation, send a password init mail
        """
        super().save_model(request, obj, form, change)

        if not change:
            # Virtually fill the password reset form
            password_reset = PasswordResetForm(data={'email': obj.email})
            if password_reset.is_valid():
                password_reset.save(request=request,
                                    use_https=request.is_secure())
                messages.success(request, _("An email to set the password"
                                            " was sent."))
            else:
                messages.error(request, _("The email is invalid."))

    def is_member(self, obj):
        """
        Get current membership year and check if user is there
        """
        last_adh_year = Adhesion.objects.all().order_by('starting_in') \
            .reverse().first()
        is_member = last_adh_year and obj in last_adh_year.members.all()
        if is_member:
            return format_html(
                '<img src="/static/admin/img/icon-yes.svg" alt="True">'
            )
        else:
            # TODO permit adhere only if perms.users.add_user
            return format_html(
                '<img src="/static/admin/img/icon-no.svg" alt="False"> '
                '<a class="button" href="{}">{}</a>',
                reverse('users:adherer', args=[obj.pk]),
                _('Adhere')
            )

    is_member.short_description = _('is member')
    is_member.allow_tags = True


admin_site.register(User, UserAdmin)
admin_site.register(Adhesion, AdhesionAdmin)
admin_site.register(Clef, ClefAdmin)