from django.contrib import admin
from imagekit import ImageSpec
from imagekit.admin import AdminThumbnail
from imagekit.cachefiles import ImageCacheFile
from imagekit.processors import ResizeToFill

from gallery.models import Album, City, Location, Photo


class AdminThumbnailSpec(ImageSpec):
    processors = [ResizeToFill(50, 50)]
    format = 'JPEG'
    options = {'quality': 60}


def cached_admin_thumb(instance):
    cached = ImageCacheFile(AdminThumbnailSpec(instance.photo))
    cached.generate()
    return cached


class CityAdmin(admin.ModelAdmin):
    list_display = ('name',)
    search_fields = ('name',)
    ordering = ('name',)
    list_per_page = 30


class LocationAdmin(admin.ModelAdmin):
    list_display = ('city', 'place')
    list_filter = ('city',)
    ordering = ('city__name',)
    search_fields = ('place', 'city__name',)
    list_per_page = 30


class AlbumAdmin(admin.ModelAdmin):
    prepopulated_fields = {'slug': ('name',)}
    list_display = ('__str__', 'location',  'album_date', 'is_public', )
    search_fields = ('name',)
    ordering = ('name',)
    list_per_page = 30
    list_editable = ('is_public', 'location')


class PhotoAdmin(admin.ModelAdmin):
    list_display = ('slug', 'album', 'admin_thumbnail',)
    list_display_links = ('slug',)
    readonly_fields = ['slug', 'taken_at', 'height', 'width', 'exif', ]
    admin_thumbnail = AdminThumbnail(image_field=cached_admin_thumb)


admin.site.register(City, CityAdmin)
admin.site.register(Location, LocationAdmin)
admin.site.register(Album, AlbumAdmin)
admin.site.register(Photo, PhotoAdmin)