# -*- coding: utf-8 -*-
from __future__ import absolute_import

import datetime
import tempfile
import os

from django import forms
from django.contrib import admin
from django.contrib.admin.views.main import ChangeList
from django.core.files.storage import FileSystemStorage
from django.core.mail import EmailMessage
from django.db import models
from django.forms.models import BaseModelFormSet

from .models import (Article, Chapter, Account, Media, Child, Parent, Picture,
    Widget, DooHickey, Grommet, Whatsit, FancyDoodad, Category, Link,
    PrePopulatedPost, PrePopulatedSubPost, CustomArticle, Section,
    ModelWithStringPrimaryKey, Color, Thing, Actor, Inquisition, Sketch, Person,
    Persona, Subscriber, ExternalSubscriber, OldSubscriber, Vodcast, EmptyModel,
    Fabric, Gallery, Language, Recommendation, Recommender, Collector, Post,
    Gadget, Villain, SuperVillain, Plot, PlotDetails, CyclicOne, CyclicTwo,
    WorkHour, Reservation, FoodDelivery, RowLevelChangePermissionModel, Paper,
    CoverLetter, Story, OtherStory, Book, Promo, ChapterXtra1, Pizza, Topping,
    Album, Question, Answer, ComplexSortedPerson, PrePopulatedPostLargeSlug)


def callable_year(dt_value):
    return dt_value.year
callable_year.admin_order_field = 'date'


class ArticleInline(admin.TabularInline):
    model = Article


class ChapterInline(admin.TabularInline):
    model = Chapter


class ChapterXtra1Admin(admin.ModelAdmin):
    list_filter = ('chap',
                   'chap__title',
                   'chap__book',
                   'chap__book__name',
                   'chap__book__promo',
                   'chap__book__promo__name',)


class ArticleAdmin(admin.ModelAdmin):
    list_display = ('content', 'date', callable_year, 'model_year', 'modeladmin_year')
    list_filter = ('date', 'section')

    def changelist_view(self, request):
        "Test that extra_context works"
        return super(ArticleAdmin, self).changelist_view(
            request, extra_context={
                'extra_var': 'Hello!'
            }
        )

    def modeladmin_year(self, obj):
        return obj.date.year
    modeladmin_year.admin_order_field = 'date'
    modeladmin_year.short_description = None

    def delete_model(self, request, obj):
        EmailMessage(
            'Greetings from a deleted object',
            'I hereby inform you that some user deleted me',
            'from@example.com',
            ['to@example.com']
        ).send()
        return super(ArticleAdmin, self).delete_model(request, obj)

    def save_model(self, request, obj, form, change=True):
        EmailMessage(
            'Greetings from a created object',
            'I hereby inform you that some user created me',
            'from@example.com',
            ['to@example.com']
        ).send()
        return super(ArticleAdmin, self).save_model(request, obj, form, change)


class RowLevelChangePermissionModelAdmin(admin.ModelAdmin):
    def has_change_permission(self, request, obj=None):
        """ Only allow changing objects with even id number """
        return request.user.is_staff and (obj is not None) and (obj.id % 2 == 0)


class CustomArticleAdmin(admin.ModelAdmin):
    """
    Tests various hooks for using custom templates and contexts.
    """
    change_list_template = 'custom_admin/change_list.html'
    change_form_template = 'custom_admin/change_form.html'
    add_form_template = 'custom_admin/add_form.html'
    object_history_template = 'custom_admin/object_history.html'
    delete_confirmation_template = 'custom_admin/delete_confirmation.html'
    delete_selected_confirmation_template = 'custom_admin/delete_selected_confirmation.html'

    def changelist_view(self, request):
        "Test that extra_context works"
        return super(CustomArticleAdmin, self).changelist_view(
            request, extra_context={
                'extra_var': 'Hello!'
            }
        )


class ThingAdmin(admin.ModelAdmin):
    list_filter = ('color__warm', 'color__value')


class InquisitionAdmin(admin.ModelAdmin):
    list_display = ('leader', 'country', 'expected')


class SketchAdmin(admin.ModelAdmin):
    raw_id_fields = ('inquisition',)


class FabricAdmin(admin.ModelAdmin):
    list_display = ('surface',)
    list_filter = ('surface',)


class BasePersonModelFormSet(BaseModelFormSet):
    def clean(self):
        for person_dict in self.cleaned_data:
            person = person_dict.get('id')
            alive = person_dict.get('alive')
            if person and alive and person.name == "Grace Hopper":
                raise forms.ValidationError("Grace is not a Zombie")


class PersonAdmin(admin.ModelAdmin):
    list_display = ('name', 'gender', 'alive')
    list_editable = ('gender', 'alive')
    list_filter = ('gender',)
    search_fields = ('^name',)
    save_as = True

    def get_changelist_formset(self, request, **kwargs):
        return super(PersonAdmin, self).get_changelist_formset(request,
            formset=BasePersonModelFormSet, **kwargs)

    def queryset(self, request):
        # Order by a field that isn't in list display, to be able to test
        # whether ordering is preserved.
        return super(PersonAdmin, self).queryset(request).order_by('age')


class FooAccount(Account):
    """A service-specific account of type Foo."""
    servicename = u'foo'


class BarAccount(Account):
    """A service-specific account of type Bar."""
    servicename = u'bar'


class FooAccountAdmin(admin.StackedInline):
    model = FooAccount
    extra = 1


class BarAccountAdmin(admin.StackedInline):
    model = BarAccount
    extra = 1


class PersonaAdmin(admin.ModelAdmin):
    inlines = (
        FooAccountAdmin,
        BarAccountAdmin
    )


class SubscriberAdmin(admin.ModelAdmin):
    actions = ['mail_admin']

    def mail_admin(self, request, selected):
        EmailMessage(
            'Greetings from a ModelAdmin action',
            'This is the test email from a admin action',
            'from@example.com',
            ['to@example.com']
        ).send()


def external_mail(modeladmin, request, selected):
    EmailMessage(
        'Greetings from a function action',
        'This is the test email from a function action',
        'from@example.com',
        ['to@example.com']
    ).send()
external_mail.short_description = 'External mail (Another awesome action)'


def redirect_to(modeladmin, request, selected):
    from django.http import HttpResponseRedirect
    return HttpResponseRedirect('/some-where-else/')
redirect_to.short_description = 'Redirect to (Awesome action)'


class ExternalSubscriberAdmin(admin.ModelAdmin):
    actions = [redirect_to, external_mail]


class Podcast(Media):
    release_date = models.DateField()

    class Meta:
        ordering = ('release_date',) # overridden in PodcastAdmin


class PodcastAdmin(admin.ModelAdmin):
    list_display = ('name', 'release_date')
    list_editable = ('release_date',)
    date_hierarchy = 'release_date'
    ordering = ('name',)


class VodcastAdmin(admin.ModelAdmin):
    list_display = ('name', 'released')
    list_editable = ('released',)

    ordering = ('name',)


class ChildInline(admin.StackedInline):
    model = Child


class ParentAdmin(admin.ModelAdmin):
    model = Parent
    inlines = [ChildInline]

    list_editable = ('name',)

    def save_related(self, request, form, formsets, change):
        super(ParentAdmin, self).save_related(request, form, formsets, change)
        first_name, last_name = form.instance.name.split()
        for child in form.instance.child_set.all():
            if len(child.name.split()) < 2:
                child.name = child.name + ' ' + last_name
                child.save()


class EmptyModelAdmin(admin.ModelAdmin):
    def queryset(self, request):
        return super(EmptyModelAdmin, self).queryset(request).filter(pk__gt=1)


class OldSubscriberAdmin(admin.ModelAdmin):
    actions = None


temp_storage = FileSystemStorage(tempfile.mkdtemp(dir=os.environ['DJANGO_TEST_TEMP_DIR']))
UPLOAD_TO = os.path.join(temp_storage.location, 'test_upload')


class PictureInline(admin.TabularInline):
    model = Picture
    extra = 1


class GalleryAdmin(admin.ModelAdmin):
    inlines = [PictureInline]


class PictureAdmin(admin.ModelAdmin):
    pass


class LanguageAdmin(admin.ModelAdmin):
    list_display = ['iso', 'shortlist', 'english_name', 'name']
    list_editable = ['shortlist']


class RecommendationAdmin(admin.ModelAdmin):
    search_fields = ('=titletranslation__text', '=recommender__titletranslation__text',)


class WidgetInline(admin.StackedInline):
    model = Widget


class DooHickeyInline(admin.StackedInline):
    model = DooHickey


class GrommetInline(admin.StackedInline):
    model = Grommet


class WhatsitInline(admin.StackedInline):
    model = Whatsit


class FancyDoodadInline(admin.StackedInline):
    model = FancyDoodad


class CategoryAdmin(admin.ModelAdmin):
    list_display = ('id', 'collector', 'order')
    list_editable = ('order',)


class CategoryInline(admin.StackedInline):
    model = Category


class CollectorAdmin(admin.ModelAdmin):
    inlines = [
        WidgetInline, DooHickeyInline, GrommetInline, WhatsitInline,
        FancyDoodadInline, CategoryInline
    ]


class LinkInline(admin.TabularInline):
    model = Link
    extra = 1

    readonly_fields = ("posted",)


class SubPostInline(admin.TabularInline):
    model = PrePopulatedSubPost

    prepopulated_fields = {
        'subslug' : ('subtitle',)
    }

    def get_readonly_fields(self, request, obj=None):
        if obj and obj.published:
            return ('subslug',)
        return self.readonly_fields

    def get_prepopulated_fields(self, request, obj=None):
        if obj and obj.published:
            return {}
        return self.prepopulated_fields


class PrePopulatedPostAdmin(admin.ModelAdmin):
    list_display = ['title', 'slug']
    prepopulated_fields = {
        'slug' : ('title',)
    }

    inlines = [SubPostInline]

    def get_readonly_fields(self, request, obj=None):
        if obj and obj.published:
            return ('slug',)
        return self.readonly_fields

    def get_prepopulated_fields(self, request, obj=None):
        if obj and obj.published:
            return {}
        return self.prepopulated_fields


class PostAdmin(admin.ModelAdmin):
    list_display = ['title', 'public']
    readonly_fields = ('posted', 'awesomeness_level', 'coolness', 'value', lambda obj: "foo")

    inlines = [
        LinkInline
    ]

    def coolness(self, instance):
        if instance.pk:
            return "%d amount of cool." % instance.pk
        else:
            return "Unkown coolness."

    def value(self, instance):
        return 1000
    value.short_description = 'Value in $US'


class CustomChangeList(ChangeList):
    def get_query_set(self, request):
        return self.root_query_set.filter(pk=9999) # Does not exist


class GadgetAdmin(admin.ModelAdmin):
    def get_changelist(self, request, **kwargs):
        return CustomChangeList


class PizzaAdmin(admin.ModelAdmin):
    readonly_fields = ('toppings',)


class WorkHourAdmin(admin.ModelAdmin):
    list_display = ('datum', 'employee')
    list_filter = ('employee',)


class FoodDeliveryAdmin(admin.ModelAdmin):
    list_display=('reference', 'driver', 'restaurant')
    list_editable = ('driver', 'restaurant')


class PaperAdmin(admin.ModelAdmin):
    """
    A ModelAdmin with a custom queryset() method that uses only(), to test
    verbose_name display in messages shown after adding Paper instances.
    """

    def queryset(self, request):
        return super(PaperAdmin, self).queryset(request).only('title')


class CoverLetterAdmin(admin.ModelAdmin):
    """
    A ModelAdmin with a custom queryset() method that uses only(), to test
    verbose_name display in messages shown after adding CoverLetter instances.
    Note that the CoverLetter model defines a __unicode__ method.
    """

    def queryset(self, request):
        return super(CoverLetterAdmin, self).queryset(request).defer('date_written')


class StoryForm(forms.ModelForm):
    class Meta:
        widgets = {'title': forms.HiddenInput}


class StoryAdmin(admin.ModelAdmin):
    list_display = ('id', 'title', 'content')
    list_display_links = ('title',) # 'id' not in list_display_links
    list_editable = ('content', )
    form = StoryForm
    ordering = ["-pk"]


class OtherStoryAdmin(admin.ModelAdmin):
    list_display = ('id', 'title', 'content')
    list_display_links = ('title', 'id') # 'id' in list_display_links
    list_editable = ('content', )
    ordering = ["-pk"]


class ComplexSortedPersonAdmin(admin.ModelAdmin):
    list_display = ('name', 'age', 'is_employee', 'colored_name')
    ordering = ('name',)

    def colored_name(self, obj):
        return '<span style="color: #%s;">%s</span>' % ('ff00ff', obj.name)
    colored_name.allow_tags = True
    colored_name.admin_order_field = 'name'


class AlbumAdmin(admin.ModelAdmin):
    list_filter = ['title']


class WorkHourAdmin(admin.ModelAdmin):
    list_display = ('datum', 'employee')
    list_filter = ('employee',)


class PrePopulatedPostLargeSlugAdmin(admin.ModelAdmin): 
    prepopulated_fields = { 
        'slug' : ('title',) 
    } 
 
site = admin.AdminSite(name="admin")
site.register(Article, ArticleAdmin)
site.register(CustomArticle, CustomArticleAdmin)
site.register(Section, save_as=True, inlines=[ArticleInline])
site.register(ModelWithStringPrimaryKey)
site.register(Color)
site.register(Thing, ThingAdmin)
site.register(Actor)
site.register(Inquisition, InquisitionAdmin)
site.register(Sketch, SketchAdmin)
site.register(Person, PersonAdmin)
site.register(Persona, PersonaAdmin)
site.register(Subscriber, SubscriberAdmin)
site.register(ExternalSubscriber, ExternalSubscriberAdmin)
site.register(OldSubscriber, OldSubscriberAdmin)
site.register(Podcast, PodcastAdmin)
site.register(Vodcast, VodcastAdmin)
site.register(Parent, ParentAdmin)
site.register(EmptyModel, EmptyModelAdmin)
site.register(Fabric, FabricAdmin)
site.register(Gallery, GalleryAdmin)
site.register(Picture, PictureAdmin)
site.register(Language, LanguageAdmin)
site.register(Recommendation, RecommendationAdmin)
site.register(Recommender)
site.register(Collector, CollectorAdmin)
site.register(Category, CategoryAdmin)
site.register(Post, PostAdmin)
site.register(Gadget, GadgetAdmin)
site.register(Villain)
site.register(SuperVillain)
site.register(Plot)
site.register(PlotDetails)
site.register(CyclicOne)
site.register(CyclicTwo)
site.register(WorkHour, WorkHourAdmin)
site.register(Reservation)
site.register(FoodDelivery, FoodDeliveryAdmin)
site.register(RowLevelChangePermissionModel, RowLevelChangePermissionModelAdmin)
site.register(Paper, PaperAdmin)
site.register(CoverLetter, CoverLetterAdmin)
site.register(Story, StoryAdmin)
site.register(OtherStory, OtherStoryAdmin)

# We intentionally register Promo and ChapterXtra1 but not Chapter nor ChapterXtra2.
# That way we cover all four cases:
#     related ForeignKey object registered in admin
#     related ForeignKey object not registered in admin
#     related OneToOne object registered in admin
#     related OneToOne object not registered in admin
# when deleting Book so as exercise all four troublesome (w.r.t escaping
# and calling force_unicode to avoid problems on Python 2.3) paths through
# contrib.admin.util's get_deleted_objects function.
site.register(Book, inlines=[ChapterInline])
site.register(Promo)
site.register(ChapterXtra1, ChapterXtra1Admin)
site.register(Pizza, PizzaAdmin)
site.register(Topping)
site.register(Album, AlbumAdmin)
site.register(Question)
site.register(Answer)
site.register(PrePopulatedPost, PrePopulatedPostAdmin)
site.register(ComplexSortedPerson, ComplexSortedPersonAdmin)

# Register core models we need in our tests
from django.contrib.auth.models import User, Group
from django.contrib.auth.admin import UserAdmin, GroupAdmin
site.register(User, UserAdmin)
site.register(Group, GroupAdmin)
site.register(PrePopulatedPostLargeSlug, PrePopulatedPostLargeSlugAdmin) 
