from hashlib import md5
from random import randint
from uuid import uuid4

from django.forms import ModelForm
from django.contrib import admin

from oidc_provider.models import Client, Code, Token, RSAKey


class ClientForm(ModelForm):

    class Meta:
        model = Client
        exclude = []

    def __init__(self, *args, **kwargs):
        super(ClientForm, self).__init__(*args, **kwargs)
        self.fields['client_id'].required = False
        self.fields['client_id'].widget.attrs['disabled'] = 'true'
        self.fields['client_secret'].required = False
        self.fields['client_secret'].widget.attrs['disabled'] = 'true'

    def clean_client_id(self):
        instance = getattr(self, 'instance', None)
        if instance and instance.pk:
            return instance.client_id
        else:
            return str(randint(1, 999999)).zfill(6)

    def clean_client_secret(self):
        instance = getattr(self, 'instance', None)
        if instance and instance.pk:
            return instance.client_secret
        else:
            return md5(str(uuid4())).hexdigest()


@admin.register(Client)
class ClientAdmin(admin.ModelAdmin):
    
    form = ClientForm
    list_display = ['name', 'client_id', 'response_type', 'date_created']
    readonly_fields = ['date_created']
    search_fields = ['name']


@admin.register(Code)
class CodeAdmin(admin.ModelAdmin):
    
    def has_add_permission(self, request):
        return False


@admin.register(Token)
class TokenAdmin(admin.ModelAdmin):
    
    def has_add_permission(self, request):
        return False


@admin.register(RSAKey)
class RSAKeyAdmin(admin.ModelAdmin):

    readonly_fields = ['kid']