
# Copyright 2017-present Open Networking Foundation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


from django.contrib import admin

from services.hpc.models import *
from django import forms
from django.utils.safestring import mark_safe
from django.contrib.auth.admin import UserAdmin
from django.contrib.admin.widgets import FilteredSelectMultiple
from django.contrib.auth.forms import ReadOnlyPasswordHashField
from django.contrib.auth.signals import user_logged_in
from django.utils import timezone
from suit.widgets import LinkedSelect
from core.admin import ServiceAppAdmin,SliceInline,ServiceAttrAsTabInline, ReadOnlyAwareAdmin, XOSTabularInline, SliderWidget, ServicePrivilegeInline
from core.middleware import get_request

from functools import update_wrapper
from django.contrib.admin.views.main import ChangeList
from django.core.urlresolvers import reverse, NoReverseMatch
from django.contrib.admin.utils import quote

from filteredadmin import FilteredChangeList, FilteredAdmin, FilteredInline

class HpcServiceForm(forms.ModelForm):
    scale = forms.IntegerField(widget = SliderWidget, required=False)

    def __init__(self, *args, **kwargs):
        super(HpcServiceForm, self).__init__(*args, **kwargs)
        if ("instance" in kwargs) and (hasattr(kwargs["instance"], "scale")):
            self.fields['scale'].initial = kwargs["instance"].scale

    def save(self, *args, **kwargs):
        if self.cleaned_data['scale']:
             self.instance.scale = self.cleaned_data['scale']

        return super(HpcServiceForm, self).save(*args, **kwargs)

class HpcServiceAdmin(ReadOnlyAwareAdmin):
    model = HpcService
    verbose_name = "HPC Service"
    verbose_name_plural = "HPC Service"
    list_display = ("backend_status_icon", "name","enabled")
    list_display_links = ('backend_status_icon', 'name', )
    fieldsets = [(None, {'fields': ['backend_status_text', 'name','scale','enabled','versionNumber', 'description', "cmi_hostname", "hpc_port80", "watcher_hpc_network", "watcher_dnsredir_network", "watcher_dnsdemux_network"], 'classes':['suit-tab suit-tab-general']})]
    readonly_fields = ('backend_status_text', )
    inlines = [SliceInline,ServiceAttrAsTabInline,ServicePrivilegeInline]
    form = HpcServiceForm

    extracontext_registered_admins = True

    user_readonly_fields = ["name", "enabled", "versionNumber", "description"]

    suit_form_tabs =(('general', 'HPC Service Details'),
        ('administration', 'Administration'),
        ('tools', 'Tools'),
        ('slices','Slices'),
        ('serviceattrs','Additional Attributes'),
                ('serviceprivileges','Privileges'),
    )

    suit_form_includes = (('hpcadmin.html', 'top', 'administration'),
                          ('hpctools.html', 'top', 'tools') )

    def url_for_model_changelist(self, request, model):
       if not request.resolver_match.args:
           return reverse('admin:%s_%s_changelist' % (model._meta.app_label, model._meta.model_name), current_app=model._meta.app_label)
       else:
           obj_id = request.resolver_match.args[0]
           changelist_url = reverse('admin:%s_%s_filteredchangelist' % (model._meta.app_label, model._meta.model_name), args=(obj_id,), current_app=model._meta.app_label)
           return changelist_url

class HPCAdmin(FilteredAdmin):
   # Change the application breadcrumb to point to an HPC Service if one is
   # defined

   custom_app_breadcrumb_name = "Hpc"
   @property
   def custom_app_breadcrumb_url(self):
       services = HpcService.objects.all()
       if len(services)==1:
           return "/admin/hpc/hpcservice/%s/" % services[0].id
       else:
           return "/admin/hpc/hpcservice/"

class CDNPrefixInline(FilteredInline):
    model = CDNPrefix
    extra = 0
    suit_classes = 'suit-tab suit-tab-prefixes'
    fields = ('backend_status_icon', 'cdn_prefix_id', 'prefix', 'defaultOriginServer', 'enabled')
    readonly_fields = ('backend_status_icon', 'cdn_prefix_id',)

class OriginServerInline(FilteredInline):
    model = OriginServer
    extra = 0
    suit_classes = 'suit-tab suit-tab-origins'
    fields = ('backend_status_icon', 'origin_server_id', 'url')
    readonly_fields = ('backend_status_icon', 'origin_server_id')

class ContentProviderInline(FilteredInline):
    model = ContentProvider
    extra = 0
    suit_classes = 'suit-tab suit-tab-cps'
    fields = ('backend_status_icon', 'content_provider_id', 'name', 'enabled')
    readonly_fields = ('backend_status_icon', 'content_provider_id',)

class OriginServerAdmin(HPCAdmin):
    list_display = ('backend_status_icon', 'url','protocol','redirects','contentProvider','authenticated','enabled' )
    list_display_links = ('backend_status_icon', 'url', )

    fields = ('backend_status_text', 'url','protocol','redirects','contentProvider','authenticated','enabled','origin_server_id','description' )
    readonly_fields = ('backend_status_text', 'origin_server_id',)
    user_readonly_fields = ('url','protocol','redirects','contentProvider','authenticated','enabled','origin_server_id','description')

class ContentProviderForm(forms.ModelForm):
    users = forms.ModelMultipleChoiceField(
        queryset=User.objects.all(),
        required=False,
        help_text="Select which users can manage this ContentProvider",
        widget=FilteredSelectMultiple(
            verbose_name=('Users'), is_stacked=False
        )
    )

    class Meta:
        model = ContentProvider
        widgets = {
            'serviceProvider' : LinkedSelect
        }
        fields = '__all__'

    def __init__(self, *args, **kwargs):
      request = kwargs.pop('request', None)
      super(ContentProviderForm, self).__init__(*args, **kwargs)

      if self.instance and self.instance.pk:
        self.fields['users'].initial = self.instance.users.all()

class ContentProviderAdmin(HPCAdmin):
    form = ContentProviderForm
    list_display = ('backend_status_icon', 'name','description','enabled' )
    list_display_links = ('backend_status_icon', 'name', )
    readonly_fields = ('backend_status_text', )
    admin_readonly_fields = ('backend_status_text', )
    cp_readonly_fields = ('backend_status_text', 'name', 'enabled', 'serviceProvider', 'users')
    fieldsets = [ (None, {'fields': ['backend_status_text', 'name','enabled','description','serviceProvider','users'], 'classes':['suit-tab suit-tab-general']})]

    inlines = [CDNPrefixInline, OriginServerInline]

    user_readonly_fields = ('name','description','enabled','serviceProvider','users')

    suit_form_tabs = (('general','Details'),('prefixes','CDN Prefixes'), ('origins','Origin Servers'))

    def change_view(self,request, *args, **kwargs):
        if request.user.is_admin:
            self.readonly_fields = self.admin_readonly_fields
        else:
            self.readonly_fields = self.cp_readonly_fields

        return super(ContentProviderAdmin, self).change_view(request, *args, **kwargs)

    def has_add_permission(self, request):
        return request.user.is_admin

    def has_delete_permission(self, request, obj=None):
        return request.user.is_admin

class ServiceProviderAdmin(HPCAdmin):
    list_display = ('backend_status_icon', 'name', 'description', 'enabled')
    list_display_links = ('backend_status_icon', 'name', )
    fieldsets = [
        (None, {'fields': ['backend_status_text', 'name','description','enabled', 'hpcService'], 'classes':['suit-tab suit-tab-general']})]
#, ('Content Providers', {'fields':['contentProviders'],'classes':['suit-tab suit-tab-cps']})]

    readonly_fields = ('backend_status_text', )
    user_readonly_fields = ('name', 'description', 'enabled')

    suit_form_tabs = (('general','Details'),('cps','Content Providers'))
    inlines = [ContentProviderInline]

class CDNPrefixForm(forms.ModelForm):
    class Meta:
        widgets = {
            'contentProvider' : LinkedSelect
        }
        fields = '__all__'

class CDNPrefixAdmin(HPCAdmin):
    form = CDNPrefixForm
    list_display = ['backend_status_icon', 'prefix','contentProvider']
    list_display_links = ('backend_status_icon', 'prefix', )
    fields = ['backend_status_text', 'prefix', 'contentProvider', 'cdn_prefix_id', 'description', 'defaultOriginServer', 'enabled']
    readonly_fields = ('backend_status_text', )
    user_readonly_fields = ['prefix','contentProvider', "cdn_prefix_id", "description", "defaultOriginServer", "enabled"]

class SiteMapAdmin(HPCAdmin):
    model = SiteMap
    verbose_name = "Site Map"
    verbose_name_plural = "Site Map"
    list_display = ("backend_status_icon", "name", "contentProvider", "serviceProvider")
    list_display_links = ('backend_status_icon', 'name', )
    fields = ['backend_status_text', 'name', 'hpcService', 'cdnPrefix', 'contentProvider', 'serviceProvider', 'map', 'map_id']
    user_readonly_fields = ('backend_status_text', "name", "hpcService", "cdnPrefix", "contentProvider", "serviceProvider", "description", "map")
    readonly_fields = ('backend_status_text', )

class AccessMapAdmin(HPCAdmin):
    model = AccessMap
    verbose_name = "Access Map"
    verbose_name_plural = "Access Map"
    list_display = ("backend_status_icon", "name", "contentProvider")
    list_display_links = ('backend_status_icon', 'name', )
    user_readonly_fields = ('backend_status_text', "name", "contentProvider", "description", "map")
    readonly_fields = ('backend_status_text', )

class HpcHealthCheckAdmin(HPCAdmin):
    model = HpcHealthCheck
    verbose_name = "Health Check"
    verbose_name = "Health Checks"
    list_display = ["backend_status_icon", "resource_name", "kind"]
    list_display_links = ["backend_status_icon", "resource_name"]
    fields = ["backend_status_text", "hpcService", "resource_name", "kind", "result_contains", "result_min_size", "result_max_size"]
    readonly_fields = ["backend_status_text",]

admin.site.register(ServiceProvider, ServiceProviderAdmin)
admin.site.register(ContentProvider, ContentProviderAdmin)
admin.site.register(CDNPrefix, CDNPrefixAdmin)
admin.site.register(OriginServer,OriginServerAdmin)
admin.site.register(HpcService, HpcServiceAdmin)
admin.site.register(SiteMap, SiteMapAdmin)
admin.site.register(AccessMap, AccessMapAdmin)
admin.site.register(HpcHealthCheck, HpcHealthCheckAdmin)