from django.contrib import admin
from django.contrib.auth.models import User, Group
from django.contrib.contenttypes.admin import GenericStackedInline, GenericTabularInline
from django.db.models import Q
from django.contrib.contenttypes.models import ContentType
from django.contrib.auth.admin import UserAdmin as AuthUserAdmin
from django.core.urlresolvers import reverse
from django.utils.html import format_html

from .forms import AdhesionForm
from .models import ProxyUser, Corporation, Adhesion
from accounts.models import Profile
from banking.admin import PaymentInline


class AdhesionInline(GenericTabularInline):
    model = Adhesion
    ct_field = 'adherent_type'
    ct_fk_field = 'adherent_id'
    form = AdhesionForm
    min_num = 1
    max_num = 1
    extra = 0

    def has_delete_permission(self, request, obj=None):
        return False


class ProfileInlineDjango(admin.StackedInline):
    model = Profile

    def has_add_permission(self, request):
        return False

    def has_delete_permission(self, request, obj=None):
        return False


class UserAdmin(AuthUserAdmin):
    list_display = AuthUserAdmin.list_display + ('adherent_id',)
    list_filter = (AuthUserAdmin.list_filter[2],) # actif
    inlines = (ProfileInlineDjango, AdhesionInline,)

    def adherent_id(self, user):
        adherent = user.profile.adhesion
        if adherent:
            return adherent.id
    adherent_id.short_description = 'Numéro d’adhérent'

    def get_fieldsets(self, request, obj=None):
        return (
            AuthUserAdmin.fieldsets[0],
            AuthUserAdmin.fieldsets[1],
            (AuthUserAdmin.fieldsets[2][0], {
                'classes': ('collapse',),
                'fields': ('is_active', 'is_staff', 'is_superuser',), # removing groups and user_permissions
            }),
            (AuthUserAdmin.fieldsets[3][0], {
                'classes': ('collapse',),
                'fields': AuthUserAdmin.fieldsets[3][1]['fields'],
            }),
        )

    def get_actions(self, request):
        actions = super().get_actions(request)
        if 'delete_selected' in actions:
            del actions['delete_selected']
        return actions

    def has_delete_permission(self, request, obj=None):
        return obj and not obj.profile.adhesion


class AdherentTypeFilter(admin.SimpleListFilter):
    title = 'type d’adhérent'
    parameter_name = 'type'

    def lookups(self, request, model_admin):
        return (
            ('physique', 'Personne physique'),
            ('morale', 'Personne morale'),
        )

    def queryset(self, request, queryset):
        if self.value() == 'physique':
            return queryset.filter(adherent_type__app_label='auth',
                                   adherent_type__model='user')
        if self.value() == 'morale':
            return queryset.filter(adherent_type__app_label='adhesions',
                                   adherent_type__model='corporation')


class AdhesionAdmin(admin.ModelAdmin):
    list_display = ('get_id', 'get_adherent_link', 'type',)
    list_filter = (AdherentTypeFilter,)
    fields = ('id',)
    readonly_fields = ('id',)
    search_fields = ('id',)
    #inlines = (PaymentInline,)

    def get_id(self, obj):
        return 'ADT%d' % obj.id
    get_id.short_description = 'Numéro d’adhérent'

    def get_adherent_link(self, obj):
        if obj.is_physical():
            model_name = 'proxyuser'
        else:
            model_name = 'corporation'
        url = reverse('admin:adhesions_%s_change' % model_name, args=(obj.adherent.id,))
        return format_html(u'<a href="{}">{}</a>', url, str(obj.adherent))
    get_adherent_link.short_description = 'Nom ou raison sociale'

    def get_search_results(self, request, queryset, search_term):
        queryset, use_distinct = super().get_search_results(request, queryset, search_term)
        users = User.objects.filter(
                    Q(username__icontains=search_term)
                    | Q(first_name__icontains=search_term)
                    | Q(last_name__icontains=search_term)
        )
        user_type = ContentType.objects.get_for_model(User)
        queryset |= Adhesion.objects.filter(adherent_type=user_type,
                                            adherent_id__in=users.values_list('pk'))
        corporations = Corporation.objects.filter(social_reason__icontains=search_term)
        corporation_type = ContentType.objects.get_for_model(Corporation)
        queryset |= Adhesion.objects.filter(adherent_type=corporation_type,
                                            adherent_id__in=corporations.values_list('pk'))
        return queryset, use_distinct

    def get_actions(self, request):
        actions = super().get_actions(request)
        if 'delete_selected' in actions:
            del actions['delete_selected']
        return actions

    def has_add_permission(self, request):
        return False

    def has_delete_permission(self, request, obj=None):
        return False


class CorporationAdmin(admin.ModelAdmin):
    list_display = ('social_reason', 'adherent_id')
    inlines = (AdhesionInline,)
    search_fields = ('social_reason',)
    filter_horizontal = ('members',)

    def adherent_id(self, corporation):
        adherent = corporation.adhesion
        if adherent:
            return adherent.id
    adherent_id.short_description = 'Numéro d’adhérent'

    def get_actions(self, request):
        actions = super().get_actions(request)
        if 'delete_selected' in actions:
            del actions['delete_selected']
        return actions

    def has_delete_permission(self, request, obj=None):
        return obj and not obj.adhesion


admin.site.unregister(User)
admin.site.unregister(Group)
admin.site.register(ProxyUser, UserAdmin)
admin.site.register(Corporation, CorporationAdmin)
admin.site.register(Adhesion, AdhesionAdmin)